/*
 * Copyright 2014 - 2019 Rafael Winterhalter
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.bytebuddy.implementation;

import net.bytebuddy.build.HashCodeAndEqualsPlugin;
import net.bytebuddy.description.enumeration.EnumerationDescription;
import net.bytebuddy.description.field.FieldDescription;
import net.bytebuddy.description.field.FieldList;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.method.ParameterDescription;
import net.bytebuddy.description.method.ParameterList;
import net.bytebuddy.description.type.TypeDefinition;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.dynamic.scaffold.FieldLocator;
import net.bytebuddy.dynamic.scaffold.InstrumentedType;
import net.bytebuddy.dynamic.scaffold.MethodGraph;
import net.bytebuddy.implementation.bytecode.*;
import net.bytebuddy.implementation.bytecode.assign.Assigner;
import net.bytebuddy.implementation.bytecode.collection.ArrayAccess;
import net.bytebuddy.implementation.bytecode.collection.ArrayFactory;
import net.bytebuddy.implementation.bytecode.constant.*;
import net.bytebuddy.implementation.bytecode.member.FieldAccess;
import net.bytebuddy.implementation.bytecode.member.MethodInvocation;
import net.bytebuddy.implementation.bytecode.member.MethodReturn;
import net.bytebuddy.implementation.bytecode.member.MethodVariableAccess;
import net.bytebuddy.matcher.ElementMatcher;
import net.bytebuddy.utility.CompoundList;
import net.bytebuddy.utility.JavaConstant;
import net.bytebuddy.utility.JavaType;
import net.bytebuddy.utility.RandomString;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.*;
import java.util.concurrent.Callable;

import static net.bytebuddy.matcher.ElementMatchers.*;

This Implementation allows the invocation of a specified method while providing explicit arguments to this method. /**
 * This {@link Implementation} allows the invocation of a specified method while
 * providing explicit arguments to this method.
 */
@HashCodeAndEqualsPlugin.Enhance
public class MethodCall implements Implementation.Composable {

    
The method locator to use.
/**
     * The method locator to use.
     */
    protected final MethodLocator.Factory methodLocator;

    
The target handler to use.
/**
     * The target handler to use.
     */
    protected final TargetHandler.Factory targetHandler;

    
The argument loader to load arguments onto the operand stack in their application order.
/**
     * The argument loader to load arguments onto the operand stack in their application order.
     */
    protected final List<ArgumentLoader.Factory> argumentLoaders;

    
The method invoker to use.
/**
     * The method invoker to use.
     */
    protected final MethodInvoker.Factory methodInvoker;

    
The termination handler to use.
/**
     * The termination handler to use.
     */
    protected final TerminationHandler.Factory terminationHandler;

    
The assigner to use.
/**
     * The assigner to use.
     */
    protected final Assigner assigner;

    
Indicates if dynamic type castings should be attempted for incompatible assignments.
/**
     * Indicates if dynamic type castings should be attempted for incompatible assignments.
     */
    protected final Assigner.Typing typing;

    
Creates a new method call implementation.
Params:
methodLocator –      The method locator to use.
targetHandler –      The target handler to use.
argumentLoaders –    The argument loader to load arguments onto the operand stack in their application order.
methodInvoker –      The method invoker to use.
terminationHandler – The termination handler to use.
assigner –           The assigner to use.
typing –             Indicates if dynamic type castings should be attempted for incompatible assignments./**
     * Creates a new method call implementation.
     *
     * @param methodLocator      The method locator to use.
     * @param targetHandler      The target handler to use.
     * @param argumentLoaders    The argument loader to load arguments onto the operand stack in their application order.
     * @param methodInvoker      The method invoker to use.
     * @param terminationHandler The termination handler to use.
     * @param assigner           The assigner to use.
     * @param typing             Indicates if dynamic type castings should be attempted for incompatible assignments.
     */
    protected MethodCall(MethodLocator.Factory methodLocator,
                         TargetHandler.Factory targetHandler,
                         List<ArgumentLoader.Factory> argumentLoaders,
                         MethodInvoker.Factory methodInvoker,
                         TerminationHandler.Factory terminationHandler,
                         Assigner assigner,
                         Assigner.Typing typing) {
        this.methodLocator = methodLocator;
        this.targetHandler = targetHandler;
        this.argumentLoaders = argumentLoaders;
        this.methodInvoker = methodInvoker;
        this.terminationHandler = terminationHandler;
        this.assigner = assigner;
        this.typing = typing;
    }

    
Invokes the given method. Without further specification, the method is invoked without any arguments on the instance of the instrumented class or statically, if the given method is static. 
Params:
method – The method to invoke.
Returns:
A method call implementation that invokes the given method without providing any arguments./**
     * Invokes the given method. Without further specification, the method is invoked without any arguments on
     * the instance of the instrumented class or statically, if the given method is {@code static}.
     *
     * @param method The method to invoke.
     * @return A method call implementation that invokes the given method without providing any arguments.
     */
    public static WithoutSpecifiedTarget invoke(Method method) {
        return invoke(new MethodDescription.ForLoadedMethod(method));
    }

    

Invokes the given constructor on the instance of the instrumented type.


Important: A constructor invocation can only be applied within another constructor to invoke the super constructor or an auxiliary constructor. To construct a new instance, use construct(Constructor<?>). 
Params:
constructor – The constructor to invoke.
Returns:
A method call implementation that invokes the given constructor without providing any arguments./**
     * <p>
     * Invokes the given constructor on the instance of the instrumented type.
     * </p>
     * <p>
     * <b>Important</b>: A constructor invocation can only be applied within another constructor to invoke the super constructor or an auxiliary
     * constructor. To construct a new instance, use {@link MethodCall#construct(Constructor)}.
     * </p>
     *
     * @param constructor The constructor to invoke.
     * @return A method call implementation that invokes the given constructor without providing any arguments.
     */
    public static WithoutSpecifiedTarget invoke(Constructor<?> constructor) {
        return invoke(new MethodDescription.ForLoadedConstructor(constructor));
    }

    
 Invokes the given method. If the method description describes a constructor, it is automatically invoked as a special method invocation on the instance of the instrumented type. The same is true for private methods. Finally, static methods are invoked statically. 

Important: A constructor invocation can only be applied within another constructor to invoke the super constructor or an auxiliary constructor. To construct a new instance, use construct(MethodDescription). 
Params:
methodDescription – The method to invoke.
Returns:
A method call implementation that invokes the given method without providing any arguments./**
     * <p>
     * Invokes the given method. If the method description describes a constructor, it is automatically invoked as
     * a special method invocation on the instance of the instrumented type. The same is true for {@code private}
     * methods. Finally, {@code static} methods are invoked statically.
     * </p>
     * <p>
     * <b>Important</b>: A constructor invocation can only be applied within another constructor to invoke the super constructor or an auxiliary
     * constructor. To construct a new instance, use {@link MethodCall#construct(MethodDescription)}.
     * </p>
     *
     * @param methodDescription The method to invoke.
     * @return A method call implementation that invokes the given method without providing any arguments.
     */
    public static WithoutSpecifiedTarget invoke(MethodDescription methodDescription) {
        return invoke(new MethodLocator.ForExplicitMethod(methodDescription));
    }

    
Invokes a unique virtual method or constructor of the instrumented type that is matched by the specified matcher.
Params:
matcher – The matcher to identify the method to invoke.
Returns:
A method call for the uniquely identified method./**
     * Invokes a unique virtual method or constructor of the instrumented type that is matched by the specified matcher.
     *
     * @param matcher The matcher to identify the method to invoke.
     * @return A method call for the uniquely identified method.
     */
    public static WithoutSpecifiedTarget invoke(ElementMatcher<? super MethodDescription> matcher) {
        return invoke(matcher, MethodGraph.Compiler.DEFAULT);
    }

    
Invokes a unique virtual method or constructor of the instrumented type that is matched by the specified matcher.
Params:
matcher –             The matcher to identify the method to invoke.
methodGraphCompiler – The method graph compiler to use.
Returns:
A method call for the uniquely identified method./**
     * Invokes a unique virtual method or constructor of the instrumented type that is matched by the specified matcher.
     *
     * @param matcher             The matcher to identify the method to invoke.
     * @param methodGraphCompiler The method graph compiler to use.
     * @return A method call for the uniquely identified method.
     */
    public static WithoutSpecifiedTarget invoke(ElementMatcher<? super MethodDescription> matcher, MethodGraph.Compiler methodGraphCompiler) {
        return invoke(new MethodLocator.ForElementMatcher.Factory(matcher, methodGraphCompiler));
    }

    
Invokes a method using the provided method locator.
Params:
methodLocator – The method locator to apply for locating the method to invoke given the instrumented
                     method.
Returns:
A method call implementation that uses the provided method locator for resolving the method
to be invoked./**
     * Invokes a method using the provided method locator.
     *
     * @param methodLocator The method locator to apply for locating the method to invoke given the instrumented
     *                      method.
     * @return A method call implementation that uses the provided method locator for resolving the method
     * to be invoked.
     */
    public static WithoutSpecifiedTarget invoke(MethodLocator.Factory methodLocator) {
        return new WithoutSpecifiedTarget(methodLocator);
    }

    
Invokes the instrumented method recursively. Invoking this method on the same instance causes a StackOverflowError due to infinite recursion. 
Returns:
A method call that invokes the method being instrumented./**
     * Invokes the instrumented method recursively. Invoking this method on the same instance causes a {@link StackOverflowError} due to
     * infinite recursion.
     *
     * @return A method call that invokes the method being instrumented.
     */
    public static WithoutSpecifiedTarget invokeSelf() {
        return new WithoutSpecifiedTarget(MethodLocator.ForInstrumentedMethod.INSTANCE);
    }

    
Invokes the instrumented method as a super method call on the instance itself. This is a shortcut for invokeSelf().onSuper(). 
Returns:
A method call that invokes the method being instrumented as a super method call./**
     * Invokes the instrumented method as a super method call on the instance itself. This is a shortcut for {@code invokeSelf().onSuper()}.
     *
     * @return A method call that invokes the method being instrumented as a super method call.
     */
    public static MethodCall invokeSuper() {
        return invokeSelf().onSuper();
    }

    
Implements a method by invoking the provided Callable. The return value of the provided object is casted to the implemented method's return type, if necessary. 
Params:
callable – The callable to invoke when a method is intercepted.
Returns:
A composable method implementation that invokes the given callable./**
     * Implements a method by invoking the provided {@link Callable}. The return value of the provided object is casted to the implemented method's
     * return type, if necessary.
     *
     * @param callable The callable to invoke when a method is intercepted.
     * @return A composable method implementation that invokes the given callable.
     */
    public static Composable call(Callable<?> callable) {
        try {
            return invoke(Callable.class.getMethod("call")).on(callable, Callable.class).withAssigner(Assigner.DEFAULT, Assigner.Typing.DYNAMIC);
        } catch (NoSuchMethodException exception) {
            throw new IllegalStateException("Could not locate Callable::call method", exception);
        }
    }

    
Implements a method by invoking the provided Runnable. If the instrumented method returns a value, null is returned. 
Params:
runnable – The runnable to invoke when a method is intercepted.
Returns:
A composable method implementation that invokes the given runnable./**
     * Implements a method by invoking the provided {@link Runnable}. If the instrumented method returns a value, {@code null} is returned.
     *
     * @param runnable The runnable to invoke when a method is intercepted.
     * @return A composable method implementation that invokes the given runnable.
     */
    public static Composable run(Runnable runnable) {
        try {
            return invoke(Runnable.class.getMethod("run")).on(runnable, Runnable.class).withAssigner(Assigner.DEFAULT, Assigner.Typing.DYNAMIC);
        } catch (NoSuchMethodException exception) {
            throw new IllegalStateException("Could not locate Runnable::run method", exception);
        }
    }

    
Invokes the given constructor in order to create an instance.
Params:
constructor – The constructor to invoke.
Returns:
A method call that invokes the given constructor without providing any arguments./**
     * Invokes the given constructor in order to create an instance.
     *
     * @param constructor The constructor to invoke.
     * @return A method call that invokes the given constructor without providing any arguments.
     */
    public static MethodCall construct(Constructor<?> constructor) {
        return construct(new MethodDescription.ForLoadedConstructor(constructor));
    }

    
Invokes the given constructor in order to create an instance.
Params:
methodDescription – A description of the constructor to invoke.
Returns:
A method call that invokes the given constructor without providing any arguments./**
     * Invokes the given constructor in order to create an instance.
     *
     * @param methodDescription A description of the constructor to invoke.
     * @return A method call that invokes the given constructor without providing any arguments.
     */
    public static MethodCall construct(MethodDescription methodDescription) {
        if (!methodDescription.isConstructor()) {
            throw new IllegalArgumentException("Not a constructor: " + methodDescription);
        }
        return new MethodCall(new MethodLocator.ForExplicitMethod(methodDescription),
                TargetHandler.ForConstructingInvocation.Factory.INSTANCE,
                Collections.<ArgumentLoader.Factory>emptyList(),
                MethodInvoker.ForContextualInvocation.Factory.INSTANCE,
                TerminationHandler.Simple.RETURNING,
                Assigner.DEFAULT,
                Assigner.Typing.STATIC);
    }

    
Defines a number of arguments to be handed to the method that is being invoked by this implementation. Any wrapper type instances for primitive values, instances of String or null are loaded directly onto the operand stack. This might corrupt referential identity for these values. Any other values are stored within a static field that is added to the instrumented type. 
Params:
argument – The arguments to provide to the method that is being called in their order.
Returns:
A method call that hands the provided arguments to the invoked method./**
     * Defines a number of arguments to be handed to the method that is being invoked by this implementation. Any
     * wrapper type instances for primitive values, instances of {@link java.lang.String} or {@code null} are loaded
     * directly onto the operand stack. This might corrupt referential identity for these values. Any other values
     * are stored within a {@code static} field that is added to the instrumented type.
     *
     * @param argument The arguments to provide to the method that is being called in their order.
     * @return A method call that hands the provided arguments to the invoked method.
     */
    public MethodCall with(Object... argument) {
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(argument.length);
        for (Object anArgument : argument) {
            argumentLoaders.add(ArgumentLoader.ForStackManipulation.of(anArgument));
        }
        return with(argumentLoaders);
    }

    
Defines the given types to be provided as arguments to the invoked method where the represented types
are stored in the generated class's constant pool.
Params:
typeDescription – The type descriptions to provide as arguments.
Returns:
A method call that hands the provided arguments to the invoked method./**
     * Defines the given types to be provided as arguments to the invoked method where the represented types
     * are stored in the generated class's constant pool.
     *
     * @param typeDescription The type descriptions to provide as arguments.
     * @return A method call that hands the provided arguments to the invoked method.
     */
    public MethodCall with(TypeDescription... typeDescription) {
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(typeDescription.length);
        for (TypeDescription aTypeDescription : typeDescription) {
            argumentLoaders.add(new ArgumentLoader.ForStackManipulation(ClassConstant.of(aTypeDescription), Class.class));
        }
        return with(argumentLoaders);
    }

    
Defines the given enumeration values to be provided as arguments to the invoked method where the values
are read from the enumeration class on demand.
Params:
enumerationDescription – The enumeration descriptions to provide as arguments.
Returns:
A method call that hands the provided arguments to the invoked method./**
     * Defines the given enumeration values to be provided as arguments to the invoked method where the values
     * are read from the enumeration class on demand.
     *
     * @param enumerationDescription The enumeration descriptions to provide as arguments.
     * @return A method call that hands the provided arguments to the invoked method.
     */
    public MethodCall with(EnumerationDescription... enumerationDescription) {
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(enumerationDescription.length);
        for (EnumerationDescription anEnumerationDescription : enumerationDescription) {
            argumentLoaders.add(new ArgumentLoader.ForStackManipulation(FieldAccess.forEnumeration(anEnumerationDescription), anEnumerationDescription.getEnumerationType()));
        }
        return with(argumentLoaders);
    }

    
Defines the given Java instances to be provided as arguments to the invoked method where the given
instances are stored in the generated class's constant pool.
Params:
javaConstant – The Java instances to provide as arguments.
Returns:
A method call that hands the provided arguments to the invoked method./**
     * Defines the given Java instances to be provided as arguments to the invoked method where the given
     * instances are stored in the generated class's constant pool.
     *
     * @param javaConstant The Java instances to provide as arguments.
     * @return A method call that hands the provided arguments to the invoked method.
     */
    public MethodCall with(JavaConstant... javaConstant) {
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(javaConstant.length);
        for (JavaConstant aJavaConstant : javaConstant) {
            argumentLoaders.add(new ArgumentLoader.ForStackManipulation(new JavaConstantValue(aJavaConstant), aJavaConstant.getType()));
        }
        return with(argumentLoaders);
    }

    
Defines a number of arguments to be handed to the method that is being invoked by this implementation. Any value is stored within a field in order to preserve referential identity. As an exception, the null value is not stored within a field. 
Params:
argument – The arguments to provide to the method that is being called in their order.
Returns:
A method call that hands the provided arguments to the invoked method./**
     * Defines a number of arguments to be handed to the method that is being invoked by this implementation. Any
     * value is stored within a field in order to preserve referential identity. As an exception, the {@code null}
     * value is not stored within a field.
     *
     * @param argument The arguments to provide to the method that is being called in their order.
     * @return A method call that hands the provided arguments to the invoked method.
     */
    public MethodCall withReference(Object... argument) {
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(argument.length);
        for (Object anArgument : argument) {
            argumentLoaders.add(anArgument == null
                    ? ArgumentLoader.ForNullConstant.INSTANCE
                    : new ArgumentLoader.ForInstance.Factory(anArgument));
        }
        return with(argumentLoaders);
    }

    
Defines a number of arguments of the instrumented method by their parameter indices to be handed
to the invoked method as an argument.
Params:
index – The parameter indices of the instrumented method to be handed to the invoked method as an
             argument in their order. The indices are zero-based.
Returns:
A method call that hands the provided arguments to the invoked method./**
     * Defines a number of arguments of the instrumented method by their parameter indices to be handed
     * to the invoked method as an argument.
     *
     * @param index The parameter indices of the instrumented method to be handed to the invoked method as an
     *              argument in their order. The indices are zero-based.
     * @return A method call that hands the provided arguments to the invoked method.
     */
    public MethodCall withArgument(int... index) {
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(index.length);
        for (int anIndex : index) {
            if (anIndex < 0) {
                throw new IllegalArgumentException("Negative index: " + anIndex);
            }
            argumentLoaders.add(new ArgumentLoader.ForMethodParameter.Factory(anIndex));
        }
        return with(argumentLoaders);
    }

    
Adds all arguments of the instrumented method as arguments to the invoked method to this method call.
Returns:
A method call that hands all arguments of the instrumented method to the invoked method./**
     * Adds all arguments of the instrumented method as arguments to the invoked method to this method call.
     *
     * @return A method call that hands all arguments of the instrumented method to the invoked method.
     */
    public MethodCall withAllArguments() {
        return with(ArgumentLoader.ForMethodParameter.OfInstrumentedMethod.INSTANCE);
    }

    
Adds an array containing all arguments of the instrumented method to this method call.
Returns:
A method call that adds an array containing all arguments of the instrumented method to the invoked method./**
     * Adds an array containing all arguments of the instrumented method to this method call.
     *
     * @return A method call that adds an array containing all arguments of the instrumented method to the invoked method.
     */
    public MethodCall withArgumentArray() {
        return with(ArgumentLoader.ForMethodParameterArray.ForInstrumentedMethod.INSTANCE);
    }

    
 Creates a method call where the parameter with index is expected to be an array and where each element of the array is expected to represent an argument for the method being invoked. 

Note: This is typically used in combination with dynamic type assignments which is activated via withAssigner(Assigner, Typing) using a Typing.DYNAMIC. 
Params:
index – The index of the parameter.
Returns:
A method call that loads size elements from the array handed to the instrumented method as argument index./**
     * <p>
     * Creates a method call where the parameter with {@code index} is expected to be an array and where each element of the array
     * is expected to represent an argument for the method being invoked.
     * </p>
     * <p>
     * <b>Note</b>: This is typically used in combination with dynamic type assignments which is activated via
     * {@link MethodCall#withAssigner(Assigner, Assigner.Typing)} using a {@link Assigner.Typing#DYNAMIC}.
     * </p>
     *
     * @param index The index of the parameter.
     * @return A method call that loads {@code size} elements from the array handed to the instrumented method as argument {@code index}.
     */
    public MethodCall withArgumentArrayElements(int index) {
        if (index < 0) {
            throw new IllegalArgumentException("A parameter index cannot be negative: " + index);
        }
        return with(new ArgumentLoader.ForMethodParameterArrayElement.OfInvokedMethod(index));
    }

    
 Creates a method call where the parameter with index is expected to be an array and where size elements are loaded from the array as arguments for the invoked method. 

Note: This is typically used in combination with dynamic type assignments which is activated via withAssigner(Assigner, Typing) using a Typing.DYNAMIC. 
Params:
index – The index of the parameter.
size –  The amount of elements to load from the array.
Returns:
A method call that loads size elements from the array handed to the instrumented method as argument index./**
     * <p>
     * Creates a method call where the parameter with {@code index} is expected to be an array and where {@code size} elements are loaded
     * from the array as arguments for the invoked method.
     * </p>
     * <p>
     * <b>Note</b>: This is typically used in combination with dynamic type assignments which is activated via
     * {@link MethodCall#withAssigner(Assigner, Assigner.Typing)} using a {@link Assigner.Typing#DYNAMIC}.
     * </p>
     *
     * @param index The index of the parameter.
     * @param size  The amount of elements to load from the array.
     * @return A method call that loads {@code size} elements from the array handed to the instrumented method as argument {@code index}.
     */
    public MethodCall withArgumentArrayElements(int index, int size) {
        return withArgumentArrayElements(index, 0, size);
    }

    
 Creates a method call where the parameter with index is expected to be an array and where size elements are loaded from the array as arguments for the invoked method. The first element is loaded from index start. 

Note: This is typically used in combination with dynamic type assignments which is activated via withAssigner(Assigner, Typing) using a Typing.DYNAMIC. 
Params:
index – The index of the parameter.
start – The first array index to consider.
size –  The amount of elements to load from the array with increasing index from start.
Returns:
A method call that loads size elements from the array handed to the instrumented method as argument index./**
     * <p>
     * Creates a method call where the parameter with {@code index} is expected to be an array and where {@code size} elements are loaded
     * from the array as arguments for the invoked method. The first element is loaded from index {@code start}.
     * </p>
     * <p>
     * <b>Note</b>: This is typically used in combination with dynamic type assignments which is activated via
     * {@link MethodCall#withAssigner(Assigner, Assigner.Typing)} using a {@link Assigner.Typing#DYNAMIC}.
     * </p>
     *
     * @param index The index of the parameter.
     * @param start The first array index to consider.
     * @param size  The amount of elements to load from the array with increasing index from {@code start}.
     * @return A method call that loads {@code size} elements from the array handed to the instrumented method as argument {@code index}.
     */
    public MethodCall withArgumentArrayElements(int index, int start, int size) {
        if (index < 0) {
            throw new IllegalArgumentException("A parameter index cannot be negative: " + index);
        } else if (start < 0) {
            throw new IllegalArgumentException("An array index cannot be negative: " + start);
        } else if (size == 0) {
            return this;
        } else if (size < 0) {
            throw new IllegalArgumentException("Size cannot be negative: " + size);
        }
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(size);
        for (int position = 0; position < size; position++) {
            argumentLoaders.add(new ArgumentLoader.ForMethodParameterArrayElement.OfParameter(index, start + position));
        }
        return with(argumentLoaders);
    }

    
Assigns the this reference to the next parameter. 
Returns:
This method call where the next parameter is a assigned a reference to the this reference of the instance of the intercepted method./**
     * Assigns the {@code this} reference to the next parameter.
     *
     * @return This method call where the next parameter is a assigned a reference to the {@code this} reference
     * of the instance of the intercepted method.
     */
    public MethodCall withThis() {
        return with(ArgumentLoader.ForThisReference.Factory.INSTANCE);
    }

    
Assigns the Class value of the instrumented type. 
Returns:
This method call where the next parameter is a assigned a reference to the Class value of the instrumented type./**
     * Assigns the {@link java.lang.Class} value of the instrumented type.
     *
     * @return This method call where the next parameter is a assigned a reference to the {@link java.lang.Class}
     * value of the instrumented type.
     */
    public MethodCall withOwnType() {
        return with(ArgumentLoader.ForInstrumentedType.Factory.INSTANCE);
    }

    
Defines a method call which fetches a value from a list of existing fields.
Params:
name – The names of the fields.
Returns:
A method call which assigns the next parameters to the values of the given fields./**
     * Defines a method call which fetches a value from a list of existing fields.
     *
     * @param name The names of the fields.
     * @return A method call which assigns the next parameters to the values of the given fields.
     */
    public MethodCall withField(String... name) {
        return withField(FieldLocator.ForClassHierarchy.Factory.INSTANCE, name);
    }

    
Defines a method call which fetches a value from a list of existing fields.
Params:
fieldLocatorFactory – The field locator factory to use.
name –                The names of the fields.
Returns:
A method call which assigns the next parameters to the values of the given fields./**
     * Defines a method call which fetches a value from a list of existing fields.
     *
     * @param fieldLocatorFactory The field locator factory to use.
     * @param name                The names of the fields.
     * @return A method call which assigns the next parameters to the values of the given fields.
     */
    public MethodCall withField(FieldLocator.Factory fieldLocatorFactory, String... name) {
        List<ArgumentLoader.Factory> argumentLoaders = new ArrayList<ArgumentLoader.Factory>(name.length);
        for (String aName : name) {
            argumentLoaders.add(new ArgumentLoader.ForField.Factory(aName, fieldLocatorFactory));
        }
        return with(argumentLoaders);
    }

    
Defines a method call which fetches a value from a method call.
Params:
methodCall – The method call to use.
Returns:
A method call which assigns the parameter to the result of the given method call./**
     * Defines a method call which fetches a value from a method call.
     *
     * @param methodCall The method call to use.
     * @return A method call which assigns the parameter to the result of the given method call.
     */
    public MethodCall withMethodCall(MethodCall methodCall) {
        return with(new ArgumentLoader.ForMethodCall.Factory(methodCall));
    }

    
Adds a stack manipulation as an assignment to the next parameter.
Params:
stackManipulation – The stack manipulation loading the value.
type –              The type of the argument being loaded.
Returns:
A method call that adds the stack manipulation as the next argument to the invoked method./**
     * Adds a stack manipulation as an assignment to the next parameter.
     *
     * @param stackManipulation The stack manipulation loading the value.
     * @param type              The type of the argument being loaded.
     * @return A method call that adds the stack manipulation as the next argument to the invoked method.
     */
    public MethodCall with(StackManipulation stackManipulation, Type type) {
        return with(stackManipulation, TypeDefinition.Sort.describe(type));
    }

    
Adds a stack manipulation as an assignment to the next parameter.
Params:
stackManipulation – The stack manipulation loading the value.
typeDefinition –    The type of the argument being loaded.
Returns:
A method call that adds the stack manipulation as the next argument to the invoked method./**
     * Adds a stack manipulation as an assignment to the next parameter.
     *
     * @param stackManipulation The stack manipulation loading the value.
     * @param typeDefinition    The type of the argument being loaded.
     * @return A method call that adds the stack manipulation as the next argument to the invoked method.
     */
    public MethodCall with(StackManipulation stackManipulation, TypeDefinition typeDefinition) {
        return with(new ArgumentLoader.ForStackManipulation(stackManipulation, typeDefinition));
    }

    
Defines a method call that resolves arguments by the supplied argument loader factories.
Params:
argumentLoader – The argument loaders to apply to the subsequent arguments of the
Returns:
A method call that adds the arguments of the supplied argument loaders to the invoked method./**
     * Defines a method call that resolves arguments by the supplied argument loader factories.
     *
     * @param argumentLoader The argument loaders to apply to the subsequent arguments of the
     * @return A method call that adds the arguments of the supplied argument loaders to the invoked method.
     */
    public MethodCall with(ArgumentLoader.Factory... argumentLoader) {
        return with(Arrays.asList(argumentLoader));
    }

    
Defines a method call that resolves arguments by the supplied argument loader factories.
Params:
argumentLoaders – The argument loaders to apply to the subsequent arguments of the
Returns:
A method call that adds the arguments of the supplied argument loaders to the invoked method./**
     * Defines a method call that resolves arguments by the supplied argument loader factories.
     *
     * @param argumentLoaders The argument loaders to apply to the subsequent arguments of the
     * @return A method call that adds the arguments of the supplied argument loaders to the invoked method.
     */
    public MethodCall with(List<? extends ArgumentLoader.Factory> argumentLoaders) {
        return new MethodCall(methodLocator,
                targetHandler,
                CompoundList.of(this.argumentLoaders, argumentLoaders),
                methodInvoker,
                terminationHandler,
                assigner,
                typing);
    }

    
Sets the result of the method call as a value of the specified field. If the instrumented method does not return void, this instrumentation must be chained with another instrumentation. 
Params:
field – The field to set.
Returns:
A new instance of this method call that sets the resulting value as the specified field's value./**
     * Sets the result of the method call as a value of the specified field. If the instrumented method does not
     * return {@code void}, this instrumentation must be chained with another instrumentation.
     *
     * @param field The field to set.
     * @return A new instance of this method call that sets the resulting value as the specified field's value.
     */
    public FieldSetting setsField(Field field) {
        return setsField(new FieldDescription.ForLoadedField(field));
    }

    
Sets the result of the method call as a value of the specified field. If the instrumented method does not return void, this instrumentation must be chained with another instrumentation. 
Params:
fieldDescription – The field to set.
Returns:
A new instance of this method call that sets the resulting value as the specified field's value./**
     * Sets the result of the method call as a value of the specified field. If the instrumented method does not
     * return {@code void}, this instrumentation must be chained with another instrumentation.
     *
     * @param fieldDescription The field to set.
     * @return A new instance of this method call that sets the resulting value as the specified field's value.
     */
    public FieldSetting setsField(FieldDescription fieldDescription) {
        return new FieldSetting(new MethodCall(methodLocator,
                targetHandler,
                argumentLoaders,
                methodInvoker,
                new TerminationHandler.FieldSetting.Explicit(fieldDescription),
                assigner,
                typing));
    }

    
Sets the result of the method call as a value of the specified field. If the instrumented method does not return void, this instrumentation must be chained with another instrumentation. 
Params:
matcher – A matcher that locates a field in the instrumented type's hierarchy.
Returns:
A new instance of this method call that sets the resulting value as the specified field's value./**
     * Sets the result of the method call as a value of the specified field. If the instrumented method does not
     * return {@code void}, this instrumentation must be chained with another instrumentation.
     *
     * @param matcher A matcher that locates a field in the instrumented type's hierarchy.
     * @return A new instance of this method call that sets the resulting value as the specified field's value.
     */
    public FieldSetting setsField(ElementMatcher<? super FieldDescription> matcher) {
        return new FieldSetting(new MethodCall(methodLocator,
                targetHandler,
                argumentLoaders,
                methodInvoker,
                new TerminationHandler.FieldSetting.Implicit(matcher),
                assigner,
                typing));
    }

    
Defines an assigner to be used for assigning values to the parameters of the invoked method. This assigner is also used for assigning the invoked method's return value to the return type of the instrumented method, if this method is not chained with andThen(Implementation) such that a return value of this method call is discarded. 
Params:
assigner – The assigner to use.
typing –   Indicates if dynamic type castings should be attempted for incompatible assignments.
Returns:
This method call using the provided assigner./**
     * Defines an assigner to be used for assigning values to the parameters of the invoked method. This assigner
     * is also used for assigning the invoked method's return value to the return type of the instrumented method,
     * if this method is not chained with
     * {@link net.bytebuddy.implementation.MethodCall#andThen(Implementation)} such
     * that a return value of this method call is discarded.
     *
     * @param assigner The assigner to use.
     * @param typing   Indicates if dynamic type castings should be attempted for incompatible assignments.
     * @return This method call using the provided assigner.
     */
    public Composable withAssigner(Assigner assigner, Assigner.Typing typing) {
        return new MethodCall(methodLocator,
                targetHandler,
                argumentLoaders,
                methodInvoker,
                terminationHandler,
                assigner,
                typing);
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    public Implementation andThen(Implementation implementation) {
        return new Implementation.Compound(new MethodCall(methodLocator,
                targetHandler,
                argumentLoaders,
                methodInvoker,
                TerminationHandler.Simple.DROPPING,
                assigner,
                typing), implementation);
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    public Composable andThen(Composable implementation) {
        return new Implementation.Compound.Composable(new MethodCall(methodLocator,
                targetHandler,
                argumentLoaders,
                methodInvoker,
                TerminationHandler.Simple.DROPPING,
                assigner,
                typing), implementation);
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    public InstrumentedType prepare(InstrumentedType instrumentedType) {
        for (InstrumentedType.Prepareable prepareable : argumentLoaders) {
            instrumentedType = prepareable.prepare(instrumentedType);
        }
        return targetHandler.prepare(instrumentedType);
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    public ByteCodeAppender appender(Target implementationTarget) {
        return new Appender(implementationTarget, terminationHandler.make(implementationTarget.getInstrumentedType()));
    }

    
A method locator is responsible for identifying the method that is to be invoked by a MethodCall. /**
     * A method locator is responsible for identifying the method that is to be invoked
     * by a {@link net.bytebuddy.implementation.MethodCall}.
     */
    public interface MethodLocator {

        
Resolves the method to be invoked.
Params:
targetType –         The type the method is called on.
instrumentedMethod – The method being instrumented.
Returns:
The method to invoke./**
         * Resolves the method to be invoked.
         *
         * @param targetType         The type the method is called on.
         * @param instrumentedMethod The method being instrumented.
         * @return The method to invoke.
         */
        MethodDescription resolve(TypeDescription targetType, MethodDescription instrumentedMethod);

        
A factory for creating a method locator.
/**
         * A factory for creating a method locator.
         */
        interface Factory {

            
Creates a method locator for a given instrumented type.
Params:
instrumentedType – The instrumented type.
Returns:
A suitable method locator./**
             * Creates a method locator for a given instrumented type.
             *
             * @param instrumentedType The instrumented type.
             * @return A suitable method locator.
             */
            MethodLocator make(TypeDescription instrumentedType);
        }

        
A method locator that simply returns the intercepted method.
/**
         * A method locator that simply returns the intercepted method.
         */
        enum ForInstrumentedMethod implements MethodLocator, Factory {

            
The singleton instance.
/**
             * The singleton instance.
             */
            INSTANCE;

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public MethodLocator make(TypeDescription instrumentedType) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public MethodDescription resolve(TypeDescription targetType, MethodDescription instrumentedMethod) {
                return instrumentedMethod;
            }
        }

        
Invokes a given method.
/**
         * Invokes a given method.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForExplicitMethod implements MethodLocator, Factory {

            
The method to be invoked.
/**
             * The method to be invoked.
             */
            private final MethodDescription methodDescription;

            
Creates a new method locator for a given method.
Params:
methodDescription – The method to be invoked./**
             * Creates a new method locator for a given method.
             *
             * @param methodDescription The method to be invoked.
             */
            protected ForExplicitMethod(MethodDescription methodDescription) {
                this.methodDescription = methodDescription;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public MethodLocator make(TypeDescription instrumentedType) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public MethodDescription resolve(TypeDescription targetType, MethodDescription instrumentedMethod) {
                return methodDescription;
            }
        }

        
A method locator that identifies a unique virtual method.
/**
         * A method locator that identifies a unique virtual method.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForElementMatcher implements MethodLocator {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
The matcher to use.
/**
             * The matcher to use.
             */
            private final ElementMatcher<? super MethodDescription> matcher;

            
The method graph compiler to use.
/**
             * The method graph compiler to use.
             */
            private final MethodGraph.Compiler methodGraphCompiler;

            
Creates a new method locator for an element matcher.
Params:
instrumentedType –    The instrumented type.
matcher –             The matcher to use.
methodGraphCompiler – The method graph compiler to use./**
             * Creates a new method locator for an element matcher.
             *
             * @param instrumentedType    The instrumented type.
             * @param matcher             The matcher to use.
             * @param methodGraphCompiler The method graph compiler to use.
             */
            protected ForElementMatcher(TypeDescription instrumentedType, ElementMatcher<? super MethodDescription> matcher, MethodGraph.Compiler methodGraphCompiler) {
                this.instrumentedType = instrumentedType;
                this.matcher = matcher;
                this.methodGraphCompiler = methodGraphCompiler;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public MethodDescription resolve(TypeDescription targetType, MethodDescription instrumentedMethod) {
                List<MethodDescription> candidates = CompoundList.<MethodDescription>of(
                        instrumentedType.getSuperClass().getDeclaredMethods().filter(isConstructor().and(matcher)),
                        methodGraphCompiler.compile(targetType, instrumentedType).listNodes().asMethodList().filter(matcher));
                if (candidates.size() == 1) {
                    return candidates.get(0);
                } else {
                    throw new IllegalStateException(instrumentedType + " does not define exactly one virtual method or constructor for " + matcher);
                }
            }

            
A factory for a method locator that uses a matcher on the instrumented type's available methods for identifing a target method.
/**
             * A factory for a method locator that uses a matcher on the instrumented type's available methods for identifing a target method.
             */
            @HashCodeAndEqualsPlugin.Enhance
            public static class Factory implements MethodLocator.Factory {

                
The matcher to use.
/**
                 * The matcher to use.
                 */
                private final ElementMatcher<? super MethodDescription> matcher;

                
The method graph compiler to use.
/**
                 * The method graph compiler to use.
                 */
                private final MethodGraph.Compiler methodGraphCompiler;

                
Creates a factory for a method locator that identifies a method using a matcher.
Params:
matcher –             The matcher to use.
methodGraphCompiler – The method graph compiler to use./**
                 * Creates a factory for a method locator that identifies a method using a matcher.
                 *
                 * @param matcher             The matcher to use.
                 * @param methodGraphCompiler The method graph compiler to use.
                 */
                public Factory(ElementMatcher<? super MethodDescription> matcher, MethodGraph.Compiler methodGraphCompiler) {
                    this.matcher = matcher;
                    this.methodGraphCompiler = methodGraphCompiler;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public MethodLocator make(TypeDescription instrumentedType) {
                    return new ForElementMatcher(instrumentedType, matcher, methodGraphCompiler);
                }
            }
        }
    }

    
An argument loader is responsible for loading an argument for an invoked method
onto the operand stack.
/**
     * An argument loader is responsible for loading an argument for an invoked method
     * onto the operand stack.
     */
    public interface ArgumentLoader {

        
Loads the argument that is represented by this instance onto the operand stack.
Params:
target –   The target parameter.
assigner – The assigner to be used.
typing –   Indicates if dynamic type castings should be attempted for incompatible assignments.
Returns:
The stack manipulation that loads the represented argument onto the stack./**
         * Loads the argument that is represented by this instance onto the operand stack.
         *
         * @param target   The target parameter.
         * @param assigner The assigner to be used.
         * @param typing   Indicates if dynamic type castings should be attempted for incompatible assignments.
         * @return The stack manipulation that loads the represented argument onto the stack.
         */
        StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing);

        
An argument provider is responsible for providing an argument loader for each argument to supply to a method.
/**
         * An argument provider is responsible for providing an argument loader for each argument to supply to a method.
         */
        interface ArgumentProvider {

            
Resolves this provider to an argument loader for each provided argument.
Params:
instrumentedMethod – The instrumented method.
invokedMethod –      The invoked method.
Returns:
A list of provided argument loaders./**
             * Resolves this provider to an argument loader for each provided argument.
             *
             * @param instrumentedMethod The instrumented method.
             * @param invokedMethod      The invoked method.
             * @return A list of provided argument loaders.
             */
            List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod);
        }

        
A factory that produces ArgumentLoaders for a given instrumented method. /**
         * A factory that produces {@link ArgumentLoader}s for a given instrumented method.
         */
        interface Factory extends InstrumentedType.Prepareable {

            
Creates an argument provider for the supplied implementation target.
Params:
implementationTarget – The implementation target to use.
Returns:
An appropriate argument provider./**
             * Creates an argument provider for the supplied implementation target.
             *
             * @param implementationTarget The implementation target to use.
             * @return An appropriate argument provider.
             */
            ArgumentProvider make(Implementation.Target implementationTarget);
        }

        
An argument loader that loads the null value onto the operand stack. /**
         * An argument loader that loads the {@code null} value onto the operand stack.
         */
        enum ForNullConstant implements ArgumentLoader, ArgumentProvider, Factory {

            
The singleton instance.
/**
             * The singleton instance.
             */
            INSTANCE;

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public InstrumentedType prepare(InstrumentedType instrumentedType) {
                return instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public ArgumentProvider make(Implementation.Target implementationTarget) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                return Collections.<ArgumentLoader>singletonList(this);
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                if (target.getType().isPrimitive()) {
                    throw new IllegalStateException("Cannot assign null to " + target);
                }
                return NullConstant.INSTANCE;
            }
        }

        
An argument loader that assigns the this reference to a parameter. /**
         * An argument loader that assigns the {@code this} reference to a parameter.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForThisReference implements ArgumentLoader, ArgumentProvider {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
Creates an argument loader that supplies the this instance as an argument. 
Params:
instrumentedType – The instrumented type./**
             * Creates an argument loader that supplies the {@code this} instance as an argument.
             *
             * @param instrumentedType The instrumented type.
             */
            public ForThisReference(TypeDescription instrumentedType) {
                this.instrumentedType = instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                if (instrumentedMethod.isStatic()) {
                    throw new IllegalStateException(instrumentedMethod + " is static and cannot supply an invoker instance");
                }
                return Collections.<ArgumentLoader>singletonList(this);
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                StackManipulation stackManipulation = new StackManipulation.Compound(
                        MethodVariableAccess.loadThis(),
                        assigner.assign(instrumentedType.asGenericType(), target.getType(), typing));
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign " + instrumentedType + " to " + target);
                }
                return stackManipulation;
            }

            
A factory for an argument loader that supplies the this value as an argument. /**
             * A factory for an argument loader that supplies the {@code this} value as an argument.
             */
            public enum Factory implements ArgumentLoader.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return new ForThisReference(implementationTarget.getInstrumentedType());
                }
            }
        }

        
Loads the instrumented type onto the operand stack.
/**
         * Loads the instrumented type onto the operand stack.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForInstrumentedType implements ArgumentLoader, ArgumentProvider {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
Creates an argument loader for supporting the instrumented type as a type constant as an argument.
Params:
instrumentedType – The instrumented type./**
             * Creates an argument loader for supporting the instrumented type as a type constant as an argument.
             *
             * @param instrumentedType The instrumented type.
             */
            public ForInstrumentedType(TypeDescription instrumentedType) {
                this.instrumentedType = instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                return Collections.<ArgumentLoader>singletonList(this);
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                StackManipulation stackManipulation = new StackManipulation.Compound(
                        ClassConstant.of(instrumentedType),
                        assigner.assign(TypeDescription.Generic.OfNonGenericType.ForLoadedType.CLASS, target.getType(), typing));
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign Class value to " + target);
                }
                return stackManipulation;
            }

            
A factory for an argument loader that supplies the instrumented type as an argument.
/**
             * A factory for an argument loader that supplies the instrumented type as an argument.
             */
            public enum Factory implements ArgumentLoader.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return new ForInstrumentedType(implementationTarget.getInstrumentedType());
                }
            }
        }

        
Loads a parameter of the instrumented method onto the operand stack.
/**
         * Loads a parameter of the instrumented method onto the operand stack.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForMethodParameter implements ArgumentLoader {

            
The index of the parameter to be loaded onto the operand stack.
/**
             * The index of the parameter to be loaded onto the operand stack.
             */
            private final int index;

            
The instrumented method.
/**
             * The instrumented method.
             */
            private final MethodDescription instrumentedMethod;

            
Creates an argument loader for a parameter of the instrumented method.
Params:
index –              The index of the parameter to be loaded onto the operand stack.
instrumentedMethod – The instrumented method./**
             * Creates an argument loader for a parameter of the instrumented method.
             *
             * @param index              The index of the parameter to be loaded onto the operand stack.
             * @param instrumentedMethod The instrumented method.
             */
            public ForMethodParameter(int index, MethodDescription instrumentedMethod) {
                this.index = index;
                this.instrumentedMethod = instrumentedMethod;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                ParameterDescription parameterDescription = instrumentedMethod.getParameters().get(index);
                StackManipulation stackManipulation = new StackManipulation.Compound(
                        MethodVariableAccess.load(parameterDescription),
                        assigner.assign(parameterDescription.getType(), target.getType(), typing));
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign " + parameterDescription + " to " + target + " for " + instrumentedMethod);
                }
                return stackManipulation;
            }

            
A factory for argument loaders that supplies all arguments of the instrumented method as arguments.
/**
             * A factory for argument loaders that supplies all arguments of the instrumented method as arguments.
             */
            protected enum OfInstrumentedMethod implements ArgumentLoader.Factory, ArgumentProvider {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return this;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                    List<ArgumentLoader> argumentLoaders = new ArrayList<ArgumentLoader>(instrumentedMethod.getParameters().size());
                    for (ParameterDescription parameterDescription : instrumentedMethod.getParameters()) {
                        argumentLoaders.add(new ForMethodParameter(parameterDescription.getIndex(), instrumentedMethod));
                    }
                    return argumentLoaders;
                }
            }

            
A factory for an argument loader that supplies a method parameter as an argument.
/**
             * A factory for an argument loader that supplies a method parameter as an argument.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements ArgumentLoader.Factory, ArgumentProvider {

                
The index of the parameter to be loaded onto the operand stack.
/**
                 * The index of the parameter to be loaded onto the operand stack.
                 */
                private final int index;

                
Creates a factory for an argument loader that supplies a method parameter as an argument.
Params:
index – The index of the parameter to supply./**
                 * Creates a factory for an argument loader that supplies a method parameter as an argument.
                 *
                 * @param index The index of the parameter to supply.
                 */
                public Factory(int index) {
                    this.index = index;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return this;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                    if (index >= instrumentedMethod.getParameters().size()) {
                        throw new IllegalStateException(instrumentedMethod + " does not have a parameter with index " + index);
                    }
                    return Collections.<ArgumentLoader>singletonList(new ForMethodParameter(index, instrumentedMethod));
                }
            }
        }

        
Loads an array containing all arguments of a method.
/**
         * Loads an array containing all arguments of a method.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForMethodParameterArray implements ArgumentLoader {

            
The parameters to load.
/**
             * The parameters to load.
             */
            private final ParameterList<?> parameters;

            
Creates an argument loader that loads the supplied parameters onto the operand stack.
Params:
parameters – The parameters to load./**
             * Creates an argument loader that loads the supplied parameters onto the operand stack.
             *
             * @param parameters The parameters to load.
             */
            public ForMethodParameterArray(ParameterList<?> parameters) {
                this.parameters = parameters;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                TypeDescription.Generic componentType;
                if (target.getType().represents(Object.class)) {
                    componentType = TypeDescription.Generic.OBJECT;
                } else if (target.getType().isArray()) {
                    componentType = target.getType().getComponentType();
                } else {
                    throw new IllegalStateException("Cannot set method parameter array for non-array type: " + target);
                }
                List<StackManipulation> stackManipulations = new ArrayList<StackManipulation>(parameters.size());
                for (ParameterDescription parameter : parameters) {
                    StackManipulation stackManipulation = new StackManipulation.Compound(
                            MethodVariableAccess.load(parameter),
                            assigner.assign(parameter.getType(), componentType, typing)
                    );
                    if (stackManipulation.isValid()) {
                        stackManipulations.add(stackManipulation);
                    } else {
                        throw new IllegalStateException("Cannot assign " + parameter + " to " + componentType);
                    }
                }
                return new StackManipulation.Compound(ArrayFactory.forType(componentType).withValues(stackManipulations));
            }

            
A factory that creates an arguments loader that loads all parameters of the instrumented method contained in an array.
/**
             * A factory that creates an arguments loader that loads all parameters of the instrumented method contained in an array.
             */
            public enum ForInstrumentedMethod implements Factory, ArgumentProvider {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return this;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                    return Collections.<ArgumentLoader>singletonList(new ForMethodParameterArray(instrumentedMethod.getParameters()));
                }
            }
        }

        
An argument loader that loads an element of a parameter of an array type.
/**
         * An argument loader that loads an element of a parameter of an array type.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForMethodParameterArrayElement implements ArgumentLoader {

            
The parameter to load the array from.
/**
             * The parameter to load the array from.
             */
            private final ParameterDescription parameterDescription;

            
The array index to load.
/**
             * The array index to load.
             */
            private final int index;

            
Creates an argument loader for a parameter of the instrumented method where an array element is assigned to the invoked method.
Params:
parameterDescription – The parameter from which to load an array element.
index –                The array index to load./**
             * Creates an argument loader for a parameter of the instrumented method where an array element is assigned to the invoked method.
             *
             * @param parameterDescription The parameter from which to load an array element.
             * @param index                The array index to load.
             */
            public ForMethodParameterArrayElement(ParameterDescription parameterDescription, int index) {
                this.parameterDescription = parameterDescription;
                this.index = index;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                StackManipulation stackManipulation = new StackManipulation.Compound(
                        MethodVariableAccess.load(parameterDescription),
                        IntegerConstant.forValue(index),
                        ArrayAccess.of(parameterDescription.getType().getComponentType()).load(),
                        assigner.assign(parameterDescription.getType().getComponentType(), target.getType(), typing)
                );
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign " + parameterDescription.getType().getComponentType() + " to " + target);
                }
                return stackManipulation;
            }

            
Creates an argument loader for an array element that of a specific parameter.
/**
             * Creates an argument loader for an array element that of a specific parameter.
             */
            @HashCodeAndEqualsPlugin.Enhance
            public static class OfParameter implements ArgumentLoader.Factory, ArgumentProvider {

                
The parameter index.
/**
                 * The parameter index.
                 */
                private final int index;

                
The array index to load.
/**
                 * The array index to load.
                 */
                private final int arrayIndex;

                
Creates a factory for an argument loader that loads a given parameter's array value.
Params:
index –      The index of the parameter.
arrayIndex – The array index to load./**
                 * Creates a factory for an argument loader that loads a given parameter's array value.
                 *
                 * @param index      The index of the parameter.
                 * @param arrayIndex The array index to load.
                 */
                public OfParameter(int index, int arrayIndex) {
                    this.index = index;
                    this.arrayIndex = arrayIndex;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return this;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                    if (instrumentedMethod.getParameters().size() <= index) {
                        throw new IllegalStateException(instrumentedMethod + " does not declare a parameter with index " + index);
                    } else if (!instrumentedMethod.getParameters().get(index).getType().isArray()) {
                        throw new IllegalStateException("Cannot access an item from non-array parameter " + instrumentedMethod.getParameters().get(index));
                    }
                    return Collections.<ArgumentLoader>singletonList(new ForMethodParameterArrayElement(instrumentedMethod.getParameters().get(index), arrayIndex));
                }
            }

            
An argument loader factory that loads an array element from a parameter for each argument of the invoked method.
/**
             * An argument loader factory that loads an array element from a parameter for each argument of the invoked method.
             */
            @HashCodeAndEqualsPlugin.Enhance
            public static class OfInvokedMethod implements ArgumentLoader.Factory, ArgumentProvider {

                
The parameter index.
/**
                 * The parameter index.
                 */
                private final int index;

                
Creates an argument loader factory for an invoked method.
Params:
index – The parameter index./**
                 * Creates an argument loader factory for an invoked method.
                 *
                 * @param index The parameter index.
                 */
                public OfInvokedMethod(int index) {
                    this.index = index;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return this;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                    if (instrumentedMethod.getParameters().size() <= index) {
                        throw new IllegalStateException(instrumentedMethod + " does not declare a parameter with index " + index);
                    } else if (!instrumentedMethod.getParameters().get(index).getType().isArray()) {
                        throw new IllegalStateException("Cannot access an item from non-array parameter " + instrumentedMethod.getParameters().get(index));
                    }
                    List<ArgumentLoader> argumentLoaders = new ArrayList<ArgumentLoader>(instrumentedMethod.getParameters().size());
                    for (int index = 0; index < invokedMethod.getParameters().size(); index++) {
                        argumentLoaders.add(new ForMethodParameterArrayElement(instrumentedMethod.getParameters().get(this.index), index++));
                    }
                    return argumentLoaders;
                }
            }
        }

        
Loads a value onto the operand stack that is stored in a static field.
/**
         * Loads a value onto the operand stack that is stored in a static field.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForInstance implements ArgumentLoader, ArgumentProvider {

            
The description of the field.
/**
             * The description of the field.
             */
            private final FieldDescription fieldDescription;

            
Creates an argument loader that supplies the value of a static field as an argument.
Params:
fieldDescription – The description of the field./**
             * Creates an argument loader that supplies the value of a static field as an argument.
             *
             * @param fieldDescription The description of the field.
             */
            public ForInstance(FieldDescription fieldDescription) {
                this.fieldDescription = fieldDescription;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                return Collections.<ArgumentLoader>singletonList(this);
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                StackManipulation stackManipulation = new StackManipulation.Compound(
                        FieldAccess.forField(fieldDescription).read(),
                        assigner.assign(fieldDescription.getType(), target.getType(), typing));
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign " + fieldDescription.getType() + " to " + target);
                }
                return stackManipulation;
            }

            
A factory that supplies the value of a static field as an argument.
/**
             * A factory that supplies the value of a static field as an argument.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements ArgumentLoader.Factory {

                
The name prefix of the field to store the argument.
/**
                 * The name prefix of the field to store the argument.
                 */
                private static final String FIELD_PREFIX = "methodCall";

                
The value to be stored in the field.
/**
                 * The value to be stored in the field.
                 */
                private final Object value;

                
The name of the field.
/**
                 * The name of the field.
                 */
                @HashCodeAndEqualsPlugin.ValueHandling(HashCodeAndEqualsPlugin.ValueHandling.Sort.IGNORE)
                private final String name;

                
Creates a factory that loads the value of a static field as an argument.
Params:
value – The value to supply as an argument./**
                 * Creates a factory that loads the value of a static field as an argument.
                 *
                 * @param value The value to supply as an argument.
                 */
                public Factory(Object value) {
                    this.value = value;
                    name = FIELD_PREFIX + "$" + RandomString.make();
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType
                            .withField(new FieldDescription.Token(name,
                                    Opcodes.ACC_SYNTHETIC | Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC,
                                    TypeDescription.Generic.OfNonGenericType.ForLoadedType.of(value.getClass())))
                            .withInitializer(new LoadedTypeInitializer.ForStaticField(name, value));
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentProvider make(Implementation.Target implementationTarget) {
                    return new ForInstance(implementationTarget.getInstrumentedType().getDeclaredFields().filter(named(name)).getOnly());
                }
            }
        }

        
Loads the value of an existing field onto the operand stack.
/**
         * Loads the value of an existing field onto the operand stack.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForField implements ArgumentLoader {

            
The field containing the loaded value.
/**
             * The field containing the loaded value.
             */
            private final FieldDescription fieldDescription;

            
The instrumented method.
/**
             * The instrumented method.
             */
            private final MethodDescription instrumentedMethod;

            
Creates a new argument loader for loading an existing field.
Params:
fieldDescription –   The field containing the loaded value.
instrumentedMethod – The instrumented method./**
             * Creates a new argument loader for loading an existing field.
             *
             * @param fieldDescription   The field containing the loaded value.
             * @param instrumentedMethod The instrumented method.
             */
            public ForField(FieldDescription fieldDescription, MethodDescription instrumentedMethod) {
                this.fieldDescription = fieldDescription;
                this.instrumentedMethod = instrumentedMethod;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                if (!fieldDescription.isStatic() && instrumentedMethod.isStatic()) {
                    throw new IllegalStateException("Cannot access non-static " + fieldDescription + " from " + instrumentedMethod);
                }
                StackManipulation stackManipulation = new StackManipulation.Compound(
                        fieldDescription.isStatic()
                                ? StackManipulation.Trivial.INSTANCE
                                : MethodVariableAccess.loadThis(),
                        FieldAccess.forField(fieldDescription).read(),
                        assigner.assign(fieldDescription.getType(), target.getType(), typing)
                );
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign " + fieldDescription + " to " + target);
                }
                return stackManipulation;
            }

            
An argument provider for a field access.
/**
             * An argument provider for a field access.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class ArgumentProvider implements ArgumentLoader.ArgumentProvider {

                
The field being accessed.
/**
                 * The field being accessed.
                 */
                private final FieldDescription fieldDescription;

                
Creates a new argument provider for a field access.
Params:
fieldDescription – The field being accessed./**
                 * Creates a new argument provider for a field access.
                 *
                 * @param fieldDescription The field being accessed.
                 */
                protected ArgumentProvider(FieldDescription fieldDescription) {
                    this.fieldDescription = fieldDescription;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                    return Collections.<ArgumentLoader>singletonList(new ForField(fieldDescription, instrumentedMethod));
                }
            }

            
A factory for an argument loaded that loads the value of an existing field as an argument.
/**
             * A factory for an argument loaded that loads the value of an existing field as an argument.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements ArgumentLoader.Factory {

                
The name of the field.
/**
                 * The name of the field.
                 */
                private final String name;

                
The field locator to use.
/**
                 * The field locator to use.
                 */
                private final FieldLocator.Factory fieldLocatorFactory;

                
Creates a new argument loader for an existing field.
Params:
name –                The name of the field.
fieldLocatorFactory – The field locator to use./**
                 * Creates a new argument loader for an existing field.
                 *
                 * @param name                The name of the field.
                 * @param fieldLocatorFactory The field locator to use.
                 */
                public Factory(String name, FieldLocator.Factory fieldLocatorFactory) {
                    this.name = name;
                    this.fieldLocatorFactory = fieldLocatorFactory;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentLoader.ArgumentProvider make(Implementation.Target implementationTarget) {
                    FieldLocator.Resolution resolution = fieldLocatorFactory.make(implementationTarget.getInstrumentedType()).locate(name);
                    if (!resolution.isResolved()) {
                        throw new IllegalStateException("Could not locate field '" + name + "' on " + implementationTarget.getInstrumentedType());
                    }
                    return new ArgumentProvider(resolution.getField());
                }
            }
        }

        
Loads the return value of a method call onto the operand stack.
/**
         * Loads the return value of a method call onto the operand stack.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForMethodCall implements ArgumentLoader {

            
The method call's appender.
/**
             * The method call's appender.
             */
            private final Appender appender;

            
The invoked method.
/**
             * The invoked method.
             */
            private final MethodDescription methodDescription;

            
The instrumented method.
/**
             * The instrumented method.
             */
            private final MethodDescription instrumentedMethod;

            
The resolved target handler to use.
/**
             * The resolved target handler to use.
             */
            private final TargetHandler.Resolved targetHandler;

            
Creates a new argument loader for loading a method call's return value.
Params:
appender –           The method call's appender.
methodDescription –  The invoked method.
instrumentedMethod – The instrumented method.
targetHandler –      The resolved target handler to use./**
             * Creates a new argument loader for loading a method call's return value.
             *
             * @param appender           The method call's appender.
             * @param methodDescription  The invoked method.
             * @param instrumentedMethod The instrumented method.
             * @param targetHandler      The resolved target handler to use.
             */
            public ForMethodCall(Appender appender, MethodDescription methodDescription, MethodDescription instrumentedMethod, TargetHandler.Resolved targetHandler) {
                this.appender = appender;
                this.methodDescription = methodDescription;
                this.instrumentedMethod = instrumentedMethod;
                this.targetHandler = targetHandler;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                StackManipulation stackManipulation = new StackManipulation.Compound(appender.toStackManipulation(instrumentedMethod,
                        methodDescription,
                        targetHandler), assigner.assign(methodDescription.getReturnType(), target.getType(), typing));
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign return type of " + methodDescription + " to " + target);
                }
                return stackManipulation;
            }

            
An argument provider for a method call.
/**
             * An argument provider for a method call.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class ArgumentProvider implements ArgumentLoader.ArgumentProvider {

                
The method call's appender.
/**
                 * The method call's appender.
                 */
                private final Appender appender;

                
Creates a new argument provider for a method call.
Params:
appender – The method call's appender./**
                 * Creates a new argument provider for a method call.
                 *
                 * @param appender The method call's appender.
                 */
                protected ArgumentProvider(Appender appender) {
                    this.appender = appender;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                    TargetHandler.Resolved targetHandler = appender.targetHandler.resolve(instrumentedMethod);
                    return Collections.<ArgumentLoader>singletonList(new ForMethodCall(appender,
                            appender.toInvokedMethod(instrumentedMethod, targetHandler),
                            instrumentedMethod,
                            targetHandler));
                }
            }

            
A factory for an argument loaded that loads the return value of a method call as an argument.
/**
             * A factory for an argument loaded that loads the return value of a method call as an argument.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements ArgumentLoader.Factory {

                
The method call to use.
/**
                 * The method call to use.
                 */
                private final MethodCall methodCall;

                
Creates a new argument loader for an existing method call.
Params:
methodCall – The method call to use./**
                 * Creates a new argument loader for an existing method call.
                 *
                 * @param methodCall The method call to use.
                 */
                public Factory(MethodCall methodCall) {
                    this.methodCall = methodCall;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return methodCall.prepare(instrumentedType);
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public ArgumentLoader.ArgumentProvider make(Implementation.Target implementationTarget) {
                    return new ArgumentProvider(methodCall.new Appender(implementationTarget, TerminationHandler.Simple.IGNORING));
                }
            }
        }

        
Loads a stack manipulation resulting in a specific type as an argument.
/**
         * Loads a stack manipulation resulting in a specific type as an argument.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForStackManipulation implements ArgumentLoader, ArgumentProvider, Factory {

            
The stack manipulation to load.
/**
             * The stack manipulation to load.
             */
            private final StackManipulation stackManipulation;

            
The type of the resulting value.
/**
             * The type of the resulting value.
             */
            private final TypeDefinition typeDefinition;

            
Creates an argument loader that loads a stack manipulation as an argument.
Params:
stackManipulation – The stack manipulation to load.
type –              The type of the resulting value./**
             * Creates an argument loader that loads a stack manipulation as an argument.
             *
             * @param stackManipulation The stack manipulation to load.
             * @param type              The type of the resulting value.
             */
            public ForStackManipulation(StackManipulation stackManipulation, Type type) {
                this(stackManipulation, TypeDescription.Generic.Sort.describe(type));
            }

            
Creates an argument loader that loads a stack manipulation as an argument.
Params:
stackManipulation – The stack manipulation to load.
typeDefinition –    The type of the resulting value./**
             * Creates an argument loader that loads a stack manipulation as an argument.
             *
             * @param stackManipulation The stack manipulation to load.
             * @param typeDefinition    The type of the resulting value.
             */
            public ForStackManipulation(StackManipulation stackManipulation, TypeDefinition typeDefinition) {
                this.stackManipulation = stackManipulation;
                this.typeDefinition = typeDefinition;
            }

            
Creates an argument loader that loads the supplied value as a constant. If the value cannot be represented
in the constant pool, a field is created to store the value.
Params:
value – The value to load as an argument or null.
Returns:
An appropriate argument loader./**
             * Creates an argument loader that loads the supplied value as a constant. If the value cannot be represented
             * in the constant pool, a field is created to store the value.
             *
             * @param value The value to load as an argument or {@code null}.
             * @return An appropriate argument loader.
             */
            public static ArgumentLoader.Factory of(Object value) {
                if (value == null) {
                    return ForNullConstant.INSTANCE;
                } else if (value instanceof String) {
                    return new ForStackManipulation(new TextConstant((String) value), String.class);
                } else if (value instanceof Boolean) {
                    return new ForStackManipulation(IntegerConstant.forValue((Boolean) value), boolean.class);
                } else if (value instanceof Byte) {
                    return new ForStackManipulation(IntegerConstant.forValue((Byte) value), byte.class);
                } else if (value instanceof Short) {
                    return new ForStackManipulation(IntegerConstant.forValue((Short) value), short.class);
                } else if (value instanceof Character) {
                    return new ForStackManipulation(IntegerConstant.forValue((Character) value), char.class);
                } else if (value instanceof Integer) {
                    return new ForStackManipulation(IntegerConstant.forValue((Integer) value), int.class);
                } else if (value instanceof Long) {
                    return new ForStackManipulation(LongConstant.forValue((Long) value), long.class);
                } else if (value instanceof Float) {
                    return new ForStackManipulation(FloatConstant.forValue((Float) value), float.class);
                } else if (value instanceof Double) {
                    return new ForStackManipulation(DoubleConstant.forValue((Double) value), double.class);
                } else if (value instanceof Class) {
                    return new ForStackManipulation(ClassConstant.of(TypeDescription.ForLoadedType.of((Class<?>) value)), Class.class);
                } else if (JavaType.METHOD_HANDLE.isInstance(value)) {
                    return new ForStackManipulation(new JavaConstantValue(JavaConstant.MethodHandle.ofLoaded(value)), JavaType.METHOD_HANDLE.getTypeStub());
                } else if (JavaType.METHOD_TYPE.isInstance(value)) {
                    return new ForStackManipulation(new JavaConstantValue(JavaConstant.MethodType.ofLoaded(value)), JavaType.METHOD_TYPE.getTypeStub());
                } else if (value instanceof Enum<?>) {
                    EnumerationDescription enumerationDescription = new EnumerationDescription.ForLoadedEnumeration((Enum<?>) value);
                    return new ForStackManipulation(FieldAccess.forEnumeration(enumerationDescription), enumerationDescription.getEnumerationType());
                } else {
                    return new ForInstance.Factory(value);
                }
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public InstrumentedType prepare(InstrumentedType instrumentedType) {
                return instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public ArgumentProvider make(Implementation.Target implementationTarget) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public List<ArgumentLoader> resolve(MethodDescription instrumentedMethod, MethodDescription invokedMethod) {
                return Collections.<ArgumentLoader>singletonList(this);
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(ParameterDescription target, Assigner assigner, Assigner.Typing typing) {
                StackManipulation assignment = assigner.assign(typeDefinition.asGenericType(), target.getType(), typing);
                if (!assignment.isValid()) {
                    throw new IllegalStateException("Cannot assign " + target + " to " + typeDefinition);
                }
                return new StackManipulation.Compound(stackManipulation, assignment);
            }
        }
    }

    
A target handler is responsible for invoking a method for a MethodCall. /**
     * A target handler is responsible for invoking a method for a
     * {@link net.bytebuddy.implementation.MethodCall}.
     */
    protected interface TargetHandler {

        
Resolves this target handler.
Params:
instrumentedMethod – The instrumented method.
Returns:
The resolved target handler./**
         * Resolves this target handler.
         *
         * @param instrumentedMethod The instrumented method.
         * @return The resolved target handler.
         */
        Resolved resolve(MethodDescription instrumentedMethod);

        
A resolved target handler.
/**
         * A resolved target handler.
         */
        interface Resolved {

            
Returns the target's type description.
Returns:
The target's type description./**
             * Returns the target's type description.
             *
             * @return The target's type description.
             */
            TypeDescription getTypeDescription();

            
Creates a stack manipulation to represent this resolved target handler.
Params:
invokedMethod – The invoked method.
assigner –      The assigner to use.
typing –        The typing to apply.
Returns:
A stack manipulation that implements this target handler./**
             * Creates a stack manipulation to represent this resolved target handler.
             *
             * @param invokedMethod The invoked method.
             * @param assigner      The assigner to use.
             * @param typing        The typing to apply.
             * @return A stack manipulation that implements this target handler.
             */
            StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing);
        }

        
A factory for creating a target handler.
/**
         * A factory for creating a target handler.
         */
        interface Factory extends InstrumentedType.Prepareable {

            
Creates a target handler for a given implementation target.
Params:
implementationTarget – The implementation target to use.
Returns:
The target handler to use./**
             * Creates a target handler for a given implementation target.
             *
             * @param implementationTarget The implementation target to use.
             * @return The target handler to use.
             */
            TargetHandler make(Implementation.Target implementationTarget);
        }

        
A simple target handler that applies a given stack manipulation.
/**
         * A simple target handler that applies a given stack manipulation.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class Simple implements TargetHandler, Factory, Resolved {

            
The type resolved by the stack manipulation.
/**
             * The type resolved by the stack manipulation.
             */
            private final TypeDescription typeDescription;

            
The stack manipulation that loads a target for the method call.
/**
             * The stack manipulation that loads a target for the method call.
             */
            private final StackManipulation stackManipulation;

            
Creates a simple target handler.
Params:
typeDescription –   The type resolved by the stack manipulation.
stackManipulation – The stack manipulation that loads a target for the method call./**
             * Creates a simple target handler.
             *
             * @param typeDescription   The type resolved by the stack manipulation.
             * @param stackManipulation The stack manipulation that loads a target for the method call.
             */
            protected Simple(TypeDescription typeDescription, StackManipulation stackManipulation) {
                this.typeDescription = typeDescription;
                this.stackManipulation = stackManipulation;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TargetHandler make(Target implementationTarget) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public InstrumentedType prepare(InstrumentedType instrumentedType) {
                return instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public Resolved resolve(MethodDescription instrumentedMethod) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TypeDescription getTypeDescription() {
                return typeDescription;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing) {
                return stackManipulation;
            }
        }

        
A target handler that invokes a method either on the instance of the instrumented
type or as a static method.
/**
         * A target handler that invokes a method either on the instance of the instrumented
         * type or as a static method.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForSelfOrStaticInvocation implements TargetHandler {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
Creates a new target handler for a static or self-declared invocation.
Params:
instrumentedType – The instrumented type./**
             * Creates a new target handler for a static or self-declared invocation.
             *
             * @param instrumentedType The instrumented type.
             */
            protected ForSelfOrStaticInvocation(TypeDescription instrumentedType) {
                this.instrumentedType = instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TargetHandler.Resolved resolve(MethodDescription instrumentedMethod) {
                return new Resolved(instrumentedType, instrumentedMethod);
            }

            
A resolved target handler for a static or self-declared invocation.
/**
             * A resolved target handler for a static or self-declared invocation.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Resolved implements TargetHandler.Resolved {

                
The instrumented type.
/**
                 * The instrumented type.
                 */
                private final TypeDescription instrumentedType;

                
The instrumented method.
/**
                 * The instrumented method.
                 */
                private final MethodDescription instrumentedMethod;

                
Creates a resolved target handler for a static or self-declared invocation.
Params:
instrumentedType –   The instrumented type.
instrumentedMethod – The instrumented method./**
                 * Creates a resolved target handler for a static or self-declared invocation.
                 *
                 * @param instrumentedType   The instrumented type.
                 * @param instrumentedMethod The instrumented method.
                 */
                protected Resolved(TypeDescription instrumentedType,
                                   MethodDescription instrumentedMethod) {
                    this.instrumentedType = instrumentedType;
                    this.instrumentedMethod = instrumentedMethod;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TypeDescription getTypeDescription() {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing) {
                    if (instrumentedMethod.isStatic() && !invokedMethod.isStatic() && !invokedMethod.isConstructor()) {
                        throw new IllegalStateException("Cannot invoke " + invokedMethod + " from " + instrumentedMethod);
                    } else if (invokedMethod.isConstructor() && (!instrumentedMethod.isConstructor()
                            || !instrumentedType.equals(invokedMethod.getDeclaringType().asErasure())
                            && !instrumentedType.getSuperClass().asErasure().equals(invokedMethod.getDeclaringType().asErasure()))) {
                        throw new IllegalStateException("Cannot invoke " + invokedMethod + " from " + instrumentedMethod + " in " + instrumentedType);
                    }
                    return new StackManipulation.Compound(
                            invokedMethod.isStatic()
                                    ? StackManipulation.Trivial.INSTANCE
                                    : MethodVariableAccess.loadThis(),
                            invokedMethod.isConstructor()
                                    ? Duplication.SINGLE
                                    : StackManipulation.Trivial.INSTANCE
                    );
                }
            }

            
A factory for invoking a static method or a self-declared method.
/**
             * A factory for invoking a static method or a self-declared method.
             */
            protected enum Factory implements TargetHandler.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TargetHandler make(Implementation.Target implementationTarget) {
                    return new ForSelfOrStaticInvocation(implementationTarget.getInstrumentedType());
                }
            }
        }

        
Invokes a method in order to construct a new instance.
/**
         * Invokes a method in order to construct a new instance.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForConstructingInvocation implements TargetHandler, Resolved {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
Creates a new target handle constructor invocation.
Params:
instrumentedType – The instrumented type./**
             * Creates a new target handle constructor invocation.
             *
             * @param instrumentedType The instrumented type.
             */
            protected ForConstructingInvocation(TypeDescription instrumentedType) {
                this.instrumentedType = instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public Resolved resolve(MethodDescription instrumentedMethod) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TypeDescription getTypeDescription() {
                return instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing) {
                return new StackManipulation.Compound(TypeCreation.of(invokedMethod.getDeclaringType().asErasure()), Duplication.SINGLE);
            }

            
A target handler factory for a constructor invocation.
/**
             * A target handler factory for a constructor invocation.
             */
            enum Factory implements TargetHandler.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TargetHandler make(Implementation.Target implementationTarget) {
                    return new ForConstructingInvocation(implementationTarget.getInstrumentedType());
                }
            }
        }

        
A target handler that invokes a method on an instance that is stored in a static field.
/**
         * A target handler that invokes a method on an instance that is stored in a static field.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForValue implements TargetHandler, Resolved {

            
A description of the field that contains the value.
/**
             * A description of the field that contains the value.
             */
            private final FieldDescription.InDefinedShape fieldDescription;

            
Creates a new target handler for a field value.
Params:
fieldDescription – A description of the field that contains the value./**
             * Creates a new target handler for a field value.
             *
             * @param fieldDescription A description of the field that contains the value.
             */
            protected ForValue(FieldDescription.InDefinedShape fieldDescription) {
                this.fieldDescription = fieldDescription;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public Resolved resolve(MethodDescription instrumentedMethod) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TypeDescription getTypeDescription() {
                return fieldDescription.getType().asErasure();
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing) {
                StackManipulation stackManipulation = assigner.assign(fieldDescription.getType(), invokedMethod.getDeclaringType().asGenericType(), typing);
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + fieldDescription);
                }
                return new StackManipulation.Compound(
                        FieldAccess.forField(fieldDescription).read(),
                        stackManipulation
                );
            }

            
A factory for a target handler that loads a specific value.
/**
             * A factory for a target handler that loads a specific value.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements TargetHandler.Factory {

                
The name prefix of the field to store the instance.
/**
                 * The name prefix of the field to store the instance.
                 */
                private static final String FIELD_PREFIX = "invocationTarget";

                
The target on which the method is to be invoked.
/**
                 * The target on which the method is to be invoked.
                 */
                private final Object target;

                
The type of the field.
/**
                 * The type of the field.
                 */
                private final TypeDescription.Generic fieldType;

                
The name of the field to store the target.
/**
                 * The name of the field to store the target.
                 */
                @HashCodeAndEqualsPlugin.ValueHandling(HashCodeAndEqualsPlugin.ValueHandling.Sort.IGNORE)
                private final String name;

                
Creates a new target handler for a static field.
Params:
target –    The target on which the method is to be invoked.
fieldType – The type of the field./**
                 * Creates a new target handler for a static field.
                 *
                 * @param target    The target on which the method is to be invoked.
                 * @param fieldType The type of the field.
                 */
                protected Factory(Object target, TypeDescription.Generic fieldType) {
                    this.target = target;
                    this.fieldType = fieldType;
                    name = FIELD_PREFIX + "$" + RandomString.make();
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType
                            .withField(new FieldDescription.Token(name,
                                    Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC | Opcodes.ACC_VOLATILE | Opcodes.ACC_SYNTHETIC,
                                    fieldType))
                            .withInitializer(new LoadedTypeInitializer.ForStaticField(name, target));
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TargetHandler make(Implementation.Target implementationTarget) {
                    return new ForValue(implementationTarget.getInstrumentedType().getDeclaredFields().filter(named(name)).getOnly());
                }
            }
        }

        
Creates a target handler that stores the instance to invoke a method on in an instance field.
/**
         * Creates a target handler that stores the instance to invoke a method on in an instance field.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForField implements TargetHandler, Resolved {

            
A description of the field that is the target.
/**
             * A description of the field that is the target.
             */
            private final FieldDescription fieldDescription;

            
Creates a new target handler for a field description.
Params:
fieldDescription – A description of the field that is the target./**
             * Creates a new target handler for a field description.
             *
             * @param fieldDescription A description of the field that is the target.
             */
            protected ForField(FieldDescription fieldDescription) {
                this.fieldDescription = fieldDescription;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public Resolved resolve(MethodDescription instrumentedMethod) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TypeDescription getTypeDescription() {
                return fieldDescription.getType().asErasure();
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing) {
                if (!invokedMethod.isInvokableOn(fieldDescription.getType().asErasure())) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + fieldDescription);
                }
                StackManipulation stackManipulation = assigner.assign(fieldDescription.getType(), invokedMethod.getDeclaringType().asGenericType(), typing);
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + fieldDescription);
                }
                return new StackManipulation.Compound(invokedMethod.isStatic() || fieldDescription.isStatic()
                        ? StackManipulation.Trivial.INSTANCE
                        : MethodVariableAccess.loadThis(),
                        FieldAccess.forField(fieldDescription).read(), stackManipulation);
            }

            
A location of a field.
/**
             * A location of a field.
             */
            protected interface Location {

                
Resolves the field to invoke the method upon.
Params:
instrumentedType – The instrumented type.
Returns:
The field to invoke the method upon./**
                 * Resolves the field to invoke the method upon.
                 *
                 * @param instrumentedType The instrumented type.
                 * @return The field to invoke the method upon.
                 */
                FieldDescription resolve(TypeDescription instrumentedType);

                
An implicit field location.
/**
                 * An implicit field location.
                 */
                @HashCodeAndEqualsPlugin.Enhance
                class ForImplicitField implements Location {

                    
The name of the field.
/**
                     * The name of the field.
                     */
                    private final String name;

                    
The field locator factory to use.
/**
                     * The field locator factory to use.
                     */
                    private final FieldLocator.Factory fieldLocatorFactory;

                    
Creates an implicit field location.
Params:
name –                The name of the field.
fieldLocatorFactory – The field locator factory to use./**
                     * Creates an implicit field location.
                     *
                     * @param name                The name of the field.
                     * @param fieldLocatorFactory The field locator factory to use.
                     */
                    protected ForImplicitField(String name, FieldLocator.Factory fieldLocatorFactory) {
                        this.name = name;
                        this.fieldLocatorFactory = fieldLocatorFactory;
                    }

                    
{@inheritDoc}
/**
                     * {@inheritDoc}
                     */
                    public FieldDescription resolve(TypeDescription instrumentedType) {
                        FieldLocator.Resolution resolution = fieldLocatorFactory.make(instrumentedType).locate(name);
                        if (!resolution.isResolved()) {
                            throw new IllegalStateException("Could not locate field name " + name + " on " + instrumentedType);
                        }
                        return resolution.getField();
                    }
                }

                
An explicit field location.
/**
                 * An explicit field location.
                 */
                @HashCodeAndEqualsPlugin.Enhance
                class ForExplicitField implements Location {

                    
The field to resolve.
/**
                     * The field to resolve.
                     */
                    private final FieldDescription fieldDescription;

                    
Creates an explicit field location.
Params:
fieldDescription – The field to resolve./**
                     * Creates an explicit field location.
                     *
                     * @param fieldDescription The field to resolve.
                     */
                    protected ForExplicitField(FieldDescription fieldDescription) {
                        this.fieldDescription = fieldDescription;
                    }

                    
{@inheritDoc}
/**
                     * {@inheritDoc}
                     */
                    public FieldDescription resolve(TypeDescription instrumentedType) {
                        if (!fieldDescription.isStatic() && !instrumentedType.isAssignableTo(fieldDescription.getType().asErasure())) {
                            throw new IllegalStateException("Cannot access " + fieldDescription + " from " + instrumentedType);
                        }
                        return fieldDescription;
                    }
                }
            }

            
A factory for a field access.
/**
             * A factory for a field access.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements TargetHandler.Factory {

                
The field's location.
/**
                 * The field's location.
                 */
                private final Location location;

                
Creates a new target handler factory for a field location.
Params:
location – The field's location./**
                 * Creates a new target handler factory for a field location.
                 *
                 * @param location The field's location.
                 */
                protected Factory(Location location) {
                    this.location = location;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return instrumentedType;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TargetHandler make(Implementation.Target implementationTarget) {
                    FieldDescription fieldDescription = location.resolve(implementationTarget.getInstrumentedType());
                    if (!fieldDescription.isStatic() && !implementationTarget.getInstrumentedType().isAssignableTo(fieldDescription.getDeclaringType().asErasure())) {
                        throw new IllegalStateException("Cannot access " + fieldDescription + " from " + implementationTarget.getInstrumentedType());
                    }
                    return new ForField(fieldDescription);
                }
            }
        }

        
A target handler that loads the parameter of the given index as the target object.
/**
         * A target handler that loads the parameter of the given index as the target object.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForMethodParameter implements TargetHandler, Factory {

            
The index of the instrumented method's parameter that is the target of the method invocation.
/**
             * The index of the instrumented method's parameter that is the target of the method invocation.
             */
            private final int index;

            
Creates a new target handler for the instrumented method's argument.
Params:
index – The index of the instrumented method's parameter that is the target of the method invocation./**
             * Creates a new target handler for the instrumented method's argument.
             *
             * @param index The index of the instrumented method's parameter that is the target of the method invocation.
             */
            protected ForMethodParameter(int index) {
                this.index = index;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public InstrumentedType prepare(InstrumentedType instrumentedType) {
                return instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TargetHandler make(Implementation.Target implementationTarget) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TargetHandler.Resolved resolve(MethodDescription instrumentedMethod) {
                if (instrumentedMethod.getParameters().size() < index) {
                    throw new IllegalArgumentException(instrumentedMethod + " does not have a parameter with index " + index);
                }
                return new Resolved(instrumentedMethod.getParameters().get(index));
            }

            
A resolved target handler for a method parameter.
/**
             * A resolved target handler for a method parameter.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Resolved implements TargetHandler.Resolved {

                
The parameter that is the target of the method call.
/**
                 * The parameter that is the target of the method call.
                 */
                private final ParameterDescription parameterDescription;

                
Creates a new resolved target handler for a parameter.
Params:
parameterDescription – The parameter that is the target of the method call./**
                 * Creates a new resolved target handler for a parameter.
                 *
                 * @param parameterDescription The parameter that is the target of the method call.
                 */
                protected Resolved(ParameterDescription parameterDescription) {
                    this.parameterDescription = parameterDescription;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TypeDescription getTypeDescription() {
                    return parameterDescription.getType().asErasure();
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing) {
                    StackManipulation stackManipulation = assigner.assign(parameterDescription.getType(), invokedMethod.getDeclaringType().asGenericType(), typing);
                    if (!stackManipulation.isValid()) {
                        throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + parameterDescription.getType());
                    }
                    return new StackManipulation.Compound(MethodVariableAccess.load(parameterDescription), stackManipulation);
                }
            }
        }

        
A target handler that executes the method and uses it's return value as the target object.
/**
         * A target handler that executes the method and uses it's return value as the target object.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForMethodCall implements TargetHandler {

            
The appender that is the target of the using method call.
/**
             * The appender that is the target of the using method call.
             */
            private final Appender appender;

            
Creates a new target handler for another method call.
Params:
appender – The appender that is the target of the using method call./**
             * Creates a new target handler for another method call.
             *
             * @param appender The appender that is the target of the using method call.
             */
            protected ForMethodCall(Appender appender) {
                this.appender = appender;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TargetHandler.Resolved resolve(MethodDescription instrumentedMethod) {
                TargetHandler.Resolved targetHandler = appender.targetHandler.resolve(instrumentedMethod);
                return new Resolved(appender, appender.toInvokedMethod(instrumentedMethod, targetHandler), instrumentedMethod,
                        targetHandler);
            }

            
A resolved target handler for a method call.
/**
             * A resolved target handler for a method call.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Resolved implements TargetHandler.Resolved {

                
The appender to use.
/**
                 * The appender to use.
                 */
                private final Appender appender;

                
The invoked method.
/**
                 * The invoked method.
                 */
                private final MethodDescription methodDescription;

                
The instrumented method.
/**
                 * The instrumented method.
                 */
                private final MethodDescription instrumentedMethod;

                
The target handler to use.
/**
                 * The target handler to use.
                 */
                private final TargetHandler.Resolved targetHandler;

                
Creates a resolved target handler for a method call.
Params:
appender –           The appender to use.
methodDescription –  The invoked method.
instrumentedMethod – The instrumented method.
targetHandler –      The target handler to use./**
                 * Creates a resolved target handler for a method call.
                 *
                 * @param appender           The appender to use.
                 * @param methodDescription  The invoked method.
                 * @param instrumentedMethod The instrumented method.
                 * @param targetHandler      The target handler to use.
                 */
                protected Resolved(Appender appender, MethodDescription methodDescription, MethodDescription instrumentedMethod, TargetHandler.Resolved targetHandler) {
                    this.appender = appender;
                    this.methodDescription = methodDescription;
                    this.instrumentedMethod = instrumentedMethod;
                    this.targetHandler = targetHandler;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TypeDescription getTypeDescription() {
                    return methodDescription.getReturnType().asErasure();
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public StackManipulation toStackManipulation(MethodDescription invokedMethod, Assigner assigner, Assigner.Typing typing) {
                    StackManipulation stackManipulation = assigner.assign(methodDescription.getReturnType(), invokedMethod.getDeclaringType().asGenericType(), typing);
                    if (!stackManipulation.isValid()) {
                        throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + methodDescription.getReturnType());
                    }
                    return new StackManipulation.Compound(appender.toStackManipulation(instrumentedMethod,
                            methodDescription,
                            targetHandler), stackManipulation);
                }
            }

            
Creates a factory for invoking a method on the return type of another method.
/**
             * Creates a factory for invoking a method on the return type of another method.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements TargetHandler.Factory {

                
The method call to invoke.
/**
                 * The method call to invoke.
                 */
                private final MethodCall methodCall;

                
Creates a new factory for invoking another method call as a method target.
Params:
methodCall – The method call to invoke./**
                 * Creates a new factory for invoking another method call as a method target.
                 *
                 * @param methodCall The method call to invoke.
                 */
                public Factory(MethodCall methodCall) {
                    this.methodCall = methodCall;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public InstrumentedType prepare(InstrumentedType instrumentedType) {
                    return methodCall.prepare(instrumentedType);
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TargetHandler make(Implementation.Target implementationTarget) {
                    return new ForMethodCall(methodCall.new Appender(implementationTarget, TerminationHandler.Simple.IGNORING));
                }
            }
        }
    }

    
A method invoker is responsible for creating a method invocation that is to be applied by a MethodCall. /**
     * A method invoker is responsible for creating a method invocation that is to be applied by a
     * {@link net.bytebuddy.implementation.MethodCall}.
     */
    protected interface MethodInvoker {

        
Invokes the method.
Params:
invokedMethod –        The method to be invoked.
implementationTarget – The implementation target of the instrumented instance.
Returns:
A stack manipulation that represents the method invocation./**
         * Invokes the method.
         *
         * @param invokedMethod        The method to be invoked.
         * @param implementationTarget The implementation target of the instrumented instance.
         * @return A stack manipulation that represents the method invocation.
         */
        StackManipulation toStackManipulation(MethodDescription invokedMethod, Implementation.Target implementationTarget);

        
A factory for creating a method invoker.
/**
         * A factory for creating a method invoker.
         */
        interface Factory {

            
Creates a method invoker.
Params:
instrumentedType – The instrumented type.
Returns:
The method invoker to use./**
             * Creates a method invoker.
             *
             * @param instrumentedType The instrumented type.
             * @return The method invoker to use.
             */
            MethodInvoker make(TypeDescription instrumentedType);
        }

        
Applies a contextual invocation of the provided method, i.e. a static invocation for static methods,
a special invocation for constructors and private methods and a virtual invocation for any other method.
/**
         * Applies a contextual invocation of the provided method, i.e. a static invocation for static methods,
         * a special invocation for constructors and private methods and a virtual invocation for any other method.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForContextualInvocation implements MethodInvoker {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
Creates a new method invoker for a contextual invocation.
Params:
instrumentedType – The instrumented type./**
             * Creates a new method invoker for a contextual invocation.
             *
             * @param instrumentedType The instrumented type.
             */
            protected ForContextualInvocation(TypeDescription instrumentedType) {
                this.instrumentedType = instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Implementation.Target implementationTarget) {
                if (invokedMethod.isVirtual() && !invokedMethod.isInvokableOn(instrumentedType)) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + instrumentedType);
                }
                return invokedMethod.isVirtual()
                        ? MethodInvocation.invoke(invokedMethod).virtual(instrumentedType)
                        : MethodInvocation.invoke(invokedMethod);
            }

            
A factory for creating a contextual method invoker.
/**
             * A factory for creating a contextual method invoker.
             */
            enum Factory implements MethodInvoker.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public MethodInvoker make(TypeDescription instrumentedType) {
                    return new ForContextualInvocation(instrumentedType);
                }
            }
        }

        
Applies a virtual invocation on a given type.
/**
         * Applies a virtual invocation on a given type.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForVirtualInvocation implements MethodInvoker {

            
The type description to virtually invoke the method upon.
/**
             * The type description to virtually invoke the method upon.
             */
            private final TypeDescription typeDescription;

            
Creates a new method invoking for a virtual method invocation.
Params:
typeDescription – The type description to virtually invoke the method upon./**
             * Creates a new method invoking for a virtual method invocation.
             *
             * @param typeDescription The type description to virtually invoke the method upon.
             */
            protected ForVirtualInvocation(TypeDescription typeDescription) {
                this.typeDescription = typeDescription;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Implementation.Target implementationTarget) {
                if (!invokedMethod.isInvokableOn(typeDescription)) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + typeDescription);
                }
                return MethodInvocation.invoke(invokedMethod).virtual(typeDescription);
            }

            
A method invoker for a virtual method that uses an implicit target type.
/**
             * A method invoker for a virtual method that uses an implicit target type.
             */
            protected enum WithImplicitType implements MethodInvoker, MethodInvoker.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public MethodInvoker make(TypeDescription instrumentedType) {
                    return this;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public StackManipulation toStackManipulation(MethodDescription invokedMethod, Implementation.Target implementationTarget) {
                    if (!invokedMethod.isAccessibleTo(implementationTarget.getInstrumentedType()) || !invokedMethod.isVirtual()) {
                        throw new IllegalStateException("Cannot invoke " + invokedMethod + " virtually");
                    }
                    return MethodInvocation.invoke(invokedMethod);
                }
            }

            
A method invoker factory for a virtual method invocation.
/**
             * A method invoker factory for a virtual method invocation.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Factory implements MethodInvoker.Factory {

                
The type on which the virtual method is invoked.
/**
                 * The type on which the virtual method is invoked.
                 */
                private final TypeDescription typeDescription;

                
Creates a new method invoker factory for a virtual method call.
Params:
typeDescription – The type on which the virtual method is invoked./**
                 * Creates a new method invoker factory for a virtual method call.
                 *
                 * @param typeDescription The type on which the virtual method is invoked.
                 */
                protected Factory(TypeDescription typeDescription) {
                    this.typeDescription = typeDescription;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public MethodInvoker make(TypeDescription instrumentedType) {
                    if (!typeDescription.asErasure().isAccessibleTo(instrumentedType)) {
                        throw new IllegalStateException(typeDescription + " is not accessible to " + instrumentedType);
                    }
                    return new ForVirtualInvocation(typeDescription);
                }
            }
        }

        
Applies a super method invocation of the provided method.
/**
         * Applies a super method invocation of the provided method.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForSuperMethodInvocation implements MethodInvoker {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
Creates a method invoker for a super method invocation.
Params:
instrumentedType – The instrumented type./**
             * Creates a method invoker for a super method invocation.
             *
             * @param instrumentedType The instrumented type.
             */
            protected ForSuperMethodInvocation(TypeDescription instrumentedType) {
                this.instrumentedType = instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Implementation.Target implementationTarget) {
                if (!invokedMethod.isInvokableOn(implementationTarget.getOriginType().asErasure())) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " as super method of " + instrumentedType);
                }
                StackManipulation stackManipulation = implementationTarget.invokeDominant(invokedMethod.asSignatureToken());
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " as a super method");
                }
                return stackManipulation;
            }

            
A method invoker factory for a super method invocation.
/**
             * A method invoker factory for a super method invocation.
             */
            enum Factory implements MethodInvoker.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public MethodInvoker make(TypeDescription instrumentedType) {
                    if (instrumentedType.getSuperClass() == null) {
                        throw new IllegalStateException("Cannot invoke super method for " + instrumentedType);
                    }
                    return new ForSuperMethodInvocation(instrumentedType);
                }
            }
        }

        
Invokes a method as a Java 8 default method.
/**
         * Invokes a method as a Java 8 default method.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class ForDefaultMethodInvocation implements MethodInvoker {

            
The instrumented type.
/**
             * The instrumented type.
             */
            private final TypeDescription instrumentedType;

            
Creates a new method invoker for a default method invocation.
Params:
instrumentedType – The instrumented type./**
             * Creates a new method invoker for a default method invocation.
             *
             * @param instrumentedType The instrumented type.
             */
            protected ForDefaultMethodInvocation(TypeDescription instrumentedType) {
                this.instrumentedType = instrumentedType;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, Implementation.Target implementationTarget) {
                if (!invokedMethod.isInvokableOn(instrumentedType)) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " as default method of " + instrumentedType);
                }
                StackManipulation stackManipulation = implementationTarget.invokeDefault(invokedMethod.asSignatureToken(), invokedMethod.getDeclaringType().asErasure());
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot invoke " + invokedMethod + " on " + instrumentedType);
                }
                return stackManipulation;
            }

            
A factory for creating a method invoker for a default method invocation.
/**
             * A factory for creating a method invoker for a default method invocation.
             */
            enum Factory implements MethodInvoker.Factory {

                
The singleton instance.
/**
                 * The singleton instance.
                 */
                INSTANCE;

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public MethodInvoker make(TypeDescription instrumentedType) {
                    return new ForDefaultMethodInvocation(instrumentedType);
                }
            }
        }
    }

    
A termination handler is responsible to handle the return value of a method that is invoked via a MethodCall. /**
     * A termination handler is responsible to handle the return value of a method that is invoked via a
     * {@link net.bytebuddy.implementation.MethodCall}.
     */
    protected interface TerminationHandler {

        
Returns a preparing stack manipulation to apply prior to the method call.
Returns:
The stack manipulation to apply prior to the method call./**
         * Returns a preparing stack manipulation to apply prior to the method call.
         *
         * @return The stack manipulation to apply prior to the method call.
         */
        StackManipulation prepare();

        
Returns a stack manipulation that handles the method return.
Params:
invokedMethod –      The method that was invoked by the method call.
instrumentedMethod – The method being intercepted.
assigner –           The assigner to be used.
typing –             Indicates if dynamic type castings should be attempted for incompatible assignments.
Returns:
A stack manipulation that handles the method return./**
         * Returns a stack manipulation that handles the method return.
         *
         * @param invokedMethod      The method that was invoked by the method call.
         * @param instrumentedMethod The method being intercepted.
         * @param assigner           The assigner to be used.
         * @param typing             Indicates if dynamic type castings should be attempted for incompatible assignments.
         * @return A stack manipulation that handles the method return.
         */
        StackManipulation toStackManipulation(MethodDescription invokedMethod, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing);

        
A factory for creating a termination handler.
/**
         * A factory for creating a termination handler.
         */
        interface Factory {

            
Creates a termination handler for a given instrumented type.
Params:
instrumentedType – The instrumented type.
Returns:
A termination handler to apply for the instrumented type./**
             * Creates a termination handler for a given instrumented type.
             *
             * @param instrumentedType The instrumented type.
             * @return A termination handler to apply for the instrumented type.
             */
            TerminationHandler make(TypeDescription instrumentedType);
        }

        
Simple termination handler implementations.
/**
         * Simple termination handler implementations.
         */
        enum Simple implements TerminationHandler, Factory {

            
A termination handler that returns the invoked method's return value.
/**
             * A termination handler that returns the invoked method's return value.
             */
            RETURNING {
                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public StackManipulation toStackManipulation(MethodDescription invokedMethod, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
                    StackManipulation stackManipulation = assigner.assign(invokedMethod.isConstructor()
                            ? invokedMethod.getDeclaringType().asGenericType()
                            : invokedMethod.getReturnType(), instrumentedMethod.getReturnType(), typing);
                    if (!stackManipulation.isValid()) {
                        throw new IllegalStateException("Cannot return " + invokedMethod.getReturnType() + " from " + instrumentedMethod);
                    }
                    return new StackManipulation.Compound(stackManipulation, MethodReturn.of(instrumentedMethod.getReturnType()));
                }
            },

            
A termination handler that drops the invoked method's return value.
/**
             * A termination handler that drops the invoked method's return value.
             */
            DROPPING {
                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public StackManipulation toStackManipulation(MethodDescription invokedMethod, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
                    return Removal.of(invokedMethod.isConstructor()
                            ? invokedMethod.getDeclaringType()
                            : invokedMethod.getReturnType());
                }
            },

            
A termination handler that does not apply any change.
/**
             * A termination handler that does not apply any change.
             */
            IGNORING {
                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public StackManipulation toStackManipulation(MethodDescription invokedMethod, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
                    return StackManipulation.Trivial.INSTANCE;
                }
            };

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public TerminationHandler make(TypeDescription instrumentedType) {
                return this;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation prepare() {
                return StackManipulation.Trivial.INSTANCE;
            }
        }

        
A termination handler that sets a field.
/**
         * A termination handler that sets a field.
         */
        @HashCodeAndEqualsPlugin.Enhance
        class FieldSetting implements TerminationHandler {

            
The field to set.
/**
             * The field to set.
             */
            private final FieldDescription fieldDescription;

            
Creates a new field-setting termination handler.
Params:
fieldDescription – The field to set./**
             * Creates a new field-setting termination handler.
             *
             * @param fieldDescription The field to set.
             */
            protected FieldSetting(FieldDescription fieldDescription) {
                this.fieldDescription = fieldDescription;
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation prepare() {
                return fieldDescription.isStatic()
                        ? StackManipulation.Trivial.INSTANCE
                        : MethodVariableAccess.loadThis();
            }

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public StackManipulation toStackManipulation(MethodDescription invokedMethod, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
                StackManipulation stackManipulation = assigner.assign(invokedMethod.getReturnType(), fieldDescription.getType(), typing);
                if (!stackManipulation.isValid()) {
                    throw new IllegalStateException("Cannot assign result of " + invokedMethod + " to " + fieldDescription);
                }
                return new StackManipulation.Compound(stackManipulation, FieldAccess.forField(fieldDescription).write());
            }

            
A factory for a field-setting termination handler that locates a given field.
/**
             * A factory for a field-setting termination handler that locates a given field.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Explicit implements TerminationHandler.Factory {

                
The matcher being used for locating a field.
/**
                 * The matcher being used for locating a field.
                 */
                private final FieldDescription fieldDescription;

                
Creates a factory for a field-setting termination handler.
Params:
fieldDescription – The field to set./**
                 * Creates a factory for a field-setting termination handler.
                 *
                 * @param fieldDescription The field to set.
                 */
                protected Explicit(FieldDescription fieldDescription) {
                    this.fieldDescription = fieldDescription;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TerminationHandler make(TypeDescription instrumentedType) {
                    if (!fieldDescription.isStatic() && !instrumentedType.isAssignableTo(fieldDescription.getDeclaringType().asErasure())) {
                        throw new IllegalStateException("Cannot set " + fieldDescription + " from " + instrumentedType);
                    } else if (!fieldDescription.isAccessibleTo(instrumentedType)) {
                        throw new IllegalStateException("Cannot access " + fieldDescription + " from " + instrumentedType);
                    }
                    return new FieldSetting(fieldDescription);
                }
            }

            
A factory for a field-setting termination handler that uses a matcher to locate the target field on the insturmented type.
/**
             * A factory for a field-setting termination handler that uses a matcher to locate the target field on the insturmented type.
             */
            @HashCodeAndEqualsPlugin.Enhance
            protected static class Implicit implements TerminationHandler.Factory {

                
The matcher being used for locating a field.
/**
                 * The matcher being used for locating a field.
                 */
                private final ElementMatcher<? super FieldDescription> matcher;

                
Creates a factory for a field-setting termination handler.
Params:
matcher – The matcher being used for locating a field./**
                 * Creates a factory for a field-setting termination handler.
                 *
                 * @param matcher The matcher being used for locating a field.
                 */
                protected Implicit(ElementMatcher<? super FieldDescription> matcher) {
                    this.matcher = matcher;
                }

                
{@inheritDoc}
/**
                 * {@inheritDoc}
                 */
                public TerminationHandler make(TypeDescription instrumentedType) {
                    TypeDefinition current = instrumentedType;
                    do {
                        FieldList<?> candidates = current.getDeclaredFields().filter(isAccessibleTo(instrumentedType).and(matcher));
                        if (candidates.size() == 1) {
                            return new FieldSetting(candidates.getOnly());
                        } else if (candidates.size() == 2) {
                            throw new IllegalStateException(matcher + " is ambigous and resolved: " + candidates);
                        }
                        current = current.getSuperClass();
                    } while (current != null);
                    throw new IllegalStateException(matcher + " does not locate any accessible fields for " + instrumentedType);
                }
            }
        }
    }

    
Represents a MethodCall that invokes a method without specifying an invocation method. Some methods can for example be invoked both virtually or as a super method invocation. Similarly, interface methods can be invoked virtually or as an explicit invocation of a default method. If no explicit invocation type is set, a method is always invoked virtually unless the method represents a static methods or a constructor. /**
     * Represents a {@link net.bytebuddy.implementation.MethodCall} that invokes a method without specifying
     * an invocation method. Some methods can for example be invoked both virtually or as a super method invocation.
     * Similarly, interface methods can be invoked virtually or as an explicit invocation of a default method. If
     * no explicit invocation type is set, a method is always invoked virtually unless the method
     * represents a static methods or a constructor.
     */
    public static class WithoutSpecifiedTarget extends MethodCall {

        
Creates a new method call without a specified target.
Params:
methodLocator – The method locator to use./**
         * Creates a new method call without a specified target.
         *
         * @param methodLocator The method locator to use.
         */
        protected WithoutSpecifiedTarget(MethodLocator.Factory methodLocator) {
            super(methodLocator,
                    TargetHandler.ForSelfOrStaticInvocation.Factory.INSTANCE,
                    Collections.<ArgumentLoader.Factory>emptyList(),
                    MethodInvoker.ForContextualInvocation.Factory.INSTANCE,
                    TerminationHandler.Simple.RETURNING,
                    Assigner.DEFAULT,
                    Assigner.Typing.STATIC);
        }

        
Invokes the specified method on the given instance.
Params:
target – The object on which the method is to be invoked upon.
Returns:
A method call that invokes the provided method on the given object./**
         * Invokes the specified method on the given instance.
         *
         * @param target The object on which the method is to be invoked upon.
         * @return A method call that invokes the provided method on the given object.
         */
        @SuppressWarnings("unchecked")
        public MethodCall on(Object target) {
            return on(target, (Class) target.getClass());
        }

        
Invokes the specified method on the given instance.
Params:
target – The object on which the method is to be invoked upon.
type –   The object's type.
Type parameters:
<T> –    The type of the object.
Returns:
A method call that invokes the provided method on the given object./**
         * Invokes the specified method on the given instance.
         *
         * @param target The object on which the method is to be invoked upon.
         * @param type   The object's type.
         * @param <T>    The type of the object.
         * @return A method call that invokes the provided method on the given object.
         */
        public <T> MethodCall on(T target, Class<? super T> type) {
            return new MethodCall(methodLocator,
                    new TargetHandler.ForValue.Factory(target, TypeDescription.Generic.OfNonGenericType.ForLoadedType.of(type)),
                    argumentLoaders,
                    new MethodInvoker.ForVirtualInvocation.Factory(TypeDescription.ForLoadedType.of(type)),
                    terminationHandler,
                    assigner,
                    typing);
        }

        
Invokes the specified method on an instance that is loaded by the provided stack manipulation.
Params:
stackManipulation – The stack manipulation that loads the instance that the method is invoked upon.
type –              The type of the loaded instance.
Returns:
A method call that invokes the provided method on the value of the provided stack manipulation./**
         * Invokes the specified method on an instance that is loaded by the provided stack manipulation.
         *
         * @param stackManipulation The stack manipulation that loads the instance that the method is invoked upon.
         * @param type              The type of the loaded instance.
         * @return A method call that invokes the provided method on the value of the provided stack manipulation.
         */
        public MethodCall on(StackManipulation stackManipulation, Class<?> type) {
            return on(stackManipulation, TypeDescription.ForLoadedType.of(type));
        }

        
Invokes the specified method on an instance that is loaded by the provided stack manipulation.
Params:
stackManipulation – The stack manipulation that loads the instance that the method is invoked upon.
typeDescription –   The type of the loaded instance.
Returns:
A method call that invokes the provided method on the value of the provided stack manipulation./**
         * Invokes the specified method on an instance that is loaded by the provided stack manipulation.
         *
         * @param stackManipulation The stack manipulation that loads the instance that the method is invoked upon.
         * @param typeDescription   The type of the loaded instance.
         * @return A method call that invokes the provided method on the value of the provided stack manipulation.
         */
        public MethodCall on(StackManipulation stackManipulation, TypeDescription typeDescription) {
            return new MethodCall(methodLocator,
                    new TargetHandler.Simple(typeDescription, stackManipulation),
                    argumentLoaders,
                    new MethodInvoker.ForVirtualInvocation.Factory(typeDescription),
                    terminationHandler,
                    assigner,
                    typing);
        }

        
Invokes the specified method on the instrumented method's argument of the given index.
Params:
index – The index of the method's argument on which the specified method should be invoked.
Returns:
A method call that invokes the provided method on the given method argument./**
         * Invokes the specified method on the instrumented method's argument of the given index.
         *
         * @param index The index of the method's argument on which the specified method should be invoked.
         * @return A method call that invokes the provided method on the given method argument.
         */
        public MethodCall onArgument(int index) {
            if (index < 0) {
                throw new IllegalArgumentException("An argument index cannot be negative: " + index);
            }
            return new MethodCall(methodLocator,
                    new TargetHandler.ForMethodParameter(index),
                    argumentLoaders,
                    MethodInvoker.ForVirtualInvocation.WithImplicitType.INSTANCE,
                    terminationHandler,
                    assigner,
                    typing);
        }

        
Invokes a method on the object stored in the specified field.
Params:
name – The name of the field.
Returns:
A method call that invokes the given method on an instance that is read from a field./**
         * Invokes a method on the object stored in the specified field.
         *
         * @param name The name of the field.
         * @return A method call that invokes the given method on an instance that is read from a field.
         */
        public MethodCall onField(String name) {
            return onField(name, FieldLocator.ForClassHierarchy.Factory.INSTANCE);
        }

        
Invokes a method on the object stored in the specified field.
Params:
name –                The name of the field.
fieldLocatorFactory – The field locator factory to use for locating the field.
Returns:
A method call that invokes the given method on an instance that is read from a field./**
         * Invokes a method on the object stored in the specified field.
         *
         * @param name                The name of the field.
         * @param fieldLocatorFactory The field locator factory to use for locating the field.
         * @return A method call that invokes the given method on an instance that is read from a field.
         */
        public MethodCall onField(String name, FieldLocator.Factory fieldLocatorFactory) {
            return new MethodCall(methodLocator,
                    new TargetHandler.ForField.Factory(new TargetHandler.ForField.Location.ForImplicitField(name, fieldLocatorFactory)),
                    argumentLoaders,
                    MethodInvoker.ForVirtualInvocation.WithImplicitType.INSTANCE,
                    terminationHandler,
                    assigner,
                    typing);
        }

        
Invokes a method on the object stored in the specified field.
Params:
field – The field on which to invoke the method upon.
Returns:
A method call that invokes the given method on an instance that is read from a field./**
         * Invokes a method on the object stored in the specified field.
         *
         * @param field The field on which to invoke the method upon.
         * @return A method call that invokes the given method on an instance that is read from a field.
         */
        public MethodCall onField(Field field) {
            return onField(new FieldDescription.ForLoadedField(field));
        }

        
Invokes a method on the object stored in the specified field.
Params:
fieldDescription – The field on which to invoke the method upon.
Returns:
A method call that invokes the given method on an instance that is read from a field./**
         * Invokes a method on the object stored in the specified field.
         *
         * @param fieldDescription The field on which to invoke the method upon.
         * @return A method call that invokes the given method on an instance that is read from a field.
         */
        public MethodCall onField(FieldDescription fieldDescription) {
            return new MethodCall(methodLocator,
                    new TargetHandler.ForField.Factory(new TargetHandler.ForField.Location.ForExplicitField(fieldDescription)),
                    argumentLoaders,
                    MethodInvoker.ForVirtualInvocation.WithImplicitType.INSTANCE,
                    terminationHandler,
                    assigner,
                    typing);
        }

        
Invokes a method on the method call's return value.
Params:
methodCall – The method call that return's value is to be used in this method call
Returns:
A method call that invokes the given method on an instance that is returned from a method call./**
         * Invokes a method on the method call's return value.
         *
         * @param methodCall The method call that return's value is to be used in this method call
         * @return A method call that invokes the given method on an instance that is returned from a method call.
         */
        public MethodCall onMethodCall(MethodCall methodCall) {
            return new MethodCall(methodLocator,
                    new TargetHandler.ForMethodCall.Factory(methodCall),
                    argumentLoaders,
                    MethodInvoker.ForVirtualInvocation.WithImplicitType.INSTANCE,
                    terminationHandler,
                    assigner,
                    typing);
        }

        
Invokes the given method by a super method invocation on the instance of the instrumented type.
Note that the super method is resolved depending on the type of implementation when this method is called.
In case that a subclass is created, the super type is invoked. If a type is rebased, the rebased method
is invoked if such a method exists.
Returns:
A method call where the given method is invoked as a super method invocation./**
         * Invokes the given method by a super method invocation on the instance of the instrumented type.
         * Note that the super method is resolved depending on the type of implementation when this method is called.
         * In case that a subclass is created, the super type is invoked. If a type is rebased, the rebased method
         * is invoked if such a method exists.
         *
         * @return A method call where the given method is invoked as a super method invocation.
         */
        public MethodCall onSuper() {
            return new MethodCall(methodLocator,
                    TargetHandler.ForSelfOrStaticInvocation.Factory.INSTANCE,
                    argumentLoaders,
                    MethodInvoker.ForSuperMethodInvocation.Factory.INSTANCE,
                    terminationHandler,
                    assigner,
                    typing);
        }

        
Invokes the given method by a Java 8 default method invocation on the instance of the instrumented type.
Returns:
A method call where the given method is invoked as a super method invocation./**
         * Invokes the given method by a Java 8 default method invocation on the instance of the instrumented type.
         *
         * @return A method call where the given method is invoked as a super method invocation.
         */
        public MethodCall onDefault() {
            return new MethodCall(methodLocator,
                    TargetHandler.ForSelfOrStaticInvocation.Factory.INSTANCE,
                    argumentLoaders,
                    MethodInvoker.ForDefaultMethodInvocation.Factory.INSTANCE,
                    terminationHandler,
                    assigner,
                    typing);
        }
    }

    
A MethodCall that sets the call's result as the value of a field. /**
     * A {@link MethodCall} that sets the call's result as the value of a field.
     */
    @HashCodeAndEqualsPlugin.Enhance
    public static class FieldSetting implements Composable {

        
The represented method call.
/**
         * The represented method call.
         */
        private final MethodCall methodCall;

        
Creates a new field setting method call.
Params:
methodCall – The represented method call./**
         * Creates a new field setting method call.
         *
         * @param methodCall The represented method call.
         */
        protected FieldSetting(MethodCall methodCall) {
            this.methodCall = methodCall;
        }

        
Defines an assigner to be used for assigning values to the parameters of the invoked method. This assigner
is also used for assigning the invoked method's return value to the field being set.
Params:
assigner – The assigner to use.
typing –   Indicates if dynamic type castings should be attempted for incompatible assignments.
Returns:
This field-setting method call using the provided assigner./**
         * Defines an assigner to be used for assigning values to the parameters of the invoked method. This assigner
         * is also used for assigning the invoked method's return value to the field being set.
         *
         * @param assigner The assigner to use.
         * @param typing   Indicates if dynamic type castings should be attempted for incompatible assignments.
         * @return This field-setting method call using the provided assigner.
         */
        public Composable withAssigner(Assigner assigner, Assigner.Typing typing) {
            return new FieldSetting((MethodCall) methodCall.withAssigner(assigner, typing));
        }

        
{@inheritDoc}
/**
         * {@inheritDoc}
         */
        public InstrumentedType prepare(InstrumentedType instrumentedType) {
            return methodCall.prepare(instrumentedType);
        }

        
{@inheritDoc}
/**
         * {@inheritDoc}
         */
        public ByteCodeAppender appender(Target implementationTarget) {
            return new ByteCodeAppender.Compound(methodCall.appender(implementationTarget), Appender.INSTANCE);
        }

        
{@inheritDoc}
/**
         * {@inheritDoc}
         */
        public Implementation andThen(Implementation implementation) {
            return new Compound(methodCall, implementation);
        }

        
{@inheritDoc}
/**
         * {@inheritDoc}
         */
        public Composable andThen(Composable implementation) {
            return new Compound.Composable(methodCall, implementation);
        }

        
A byte code appender to implement a field-setting method call.
/**
         * A byte code appender to implement a field-setting method call.
         */
        protected enum Appender implements ByteCodeAppender {

            
The singleton instance.
/**
             * The singleton instance.
             */
            INSTANCE;

            
{@inheritDoc}
/**
             * {@inheritDoc}
             */
            public Size apply(MethodVisitor methodVisitor, Context implementationContext, MethodDescription instrumentedMethod) {
                if (!instrumentedMethod.getReturnType().represents(void.class)) {
                    throw new IllegalStateException("Instrumented method " + instrumentedMethod + " does not return void for field setting method call");
                }
                return new Size(MethodReturn.VOID.apply(methodVisitor, implementationContext).getMaximalSize(), instrumentedMethod.getStackSize());
            }
        }
    }

    
The appender being used to implement a MethodCall. /**
     * The appender being used to implement a {@link net.bytebuddy.implementation.MethodCall}.
     */
    @HashCodeAndEqualsPlugin.Enhance(includeSyntheticFields = true)
    protected class Appender implements ByteCodeAppender {

        
The implementation target.
/**
         * The implementation target.
         */
        private final Implementation.Target implementationTarget;

        
The method locator to use.
/**
         * The method locator to use.
         */
        private final MethodLocator methodLocator;

        
The argument providers to use.
/**
         * The argument providers to use.
         */
        private final List<ArgumentLoader.ArgumentProvider> argumentProviders;

        
The method invoker to use.
/**
         * The method invoker to use.
         */
        private final MethodInvoker methodInvoker;

        
The target handler to use.
/**
         * The target handler to use.
         */
        private final TargetHandler targetHandler;

        
The termination handler to use.
/**
         * The termination handler to use.
         */
        private final TerminationHandler terminationHandler;

        
Creates a new appender.
Params:
implementationTarget – The implementation target.
terminationHandler –   The termination handler to use./**
         * Creates a new appender.
         *
         * @param implementationTarget The implementation target.
         * @param terminationHandler   The termination handler to use.
         */
        protected Appender(Target implementationTarget, TerminationHandler terminationHandler) {
            this.implementationTarget = implementationTarget;
            methodLocator = MethodCall.this.methodLocator.make(implementationTarget.getInstrumentedType());
            argumentProviders = new ArrayList<ArgumentLoader.ArgumentProvider>(argumentLoaders.size());
            for (ArgumentLoader.Factory factory : argumentLoaders) {
                argumentProviders.add(factory.make(implementationTarget));
            }
            methodInvoker = MethodCall.this.methodInvoker.make(implementationTarget.getInstrumentedType());
            targetHandler = MethodCall.this.targetHandler.make(implementationTarget);
            this.terminationHandler = terminationHandler;
        }

        
{@inheritDoc}
/**
         * {@inheritDoc}
         */
        public Size apply(MethodVisitor methodVisitor, Context implementationContext, MethodDescription instrumentedMethod) {
            TargetHandler.Resolved targetHandler = this.targetHandler.resolve(instrumentedMethod);
            return new Size(new StackManipulation.Compound(terminationHandler.prepare(), toStackManipulation(instrumentedMethod,
                    toInvokedMethod(instrumentedMethod, targetHandler),
                    targetHandler)).apply(methodVisitor, implementationContext).getMaximalSize(), instrumentedMethod.getStackSize());
        }

        
Resolves this appender to the method being invoked.
Params:
instrumentedMethod – The instrumented method.
targetHandler –      The resolved target handler to base the stack manipulation upon.
Returns:
The invoked method./**
         * Resolves this appender to the method being invoked.
         *
         * @param instrumentedMethod The instrumented method.
         * @param targetHandler      The resolved target handler to base the stack manipulation upon.
         * @return The invoked method.
         */
        protected MethodDescription toInvokedMethod(MethodDescription instrumentedMethod, TargetHandler.Resolved targetHandler) {
            return methodLocator.resolve(targetHandler.getTypeDescription(), instrumentedMethod);
        }

        
Resolves this appender to a stack manipulation.
Params:
instrumentedMethod – The instrumented method.
invokedMethod –      The invoked method.
targetHandler –      The resolved target handler to base the stack manipulation upon.
Returns:
A stack manipulation that represents this method call./**
         * Resolves this appender to a stack manipulation.
         *
         * @param instrumentedMethod The instrumented method.
         * @param invokedMethod      The invoked method.
         * @param targetHandler      The resolved target handler to base the stack manipulation upon.
         * @return A stack manipulation that represents this method call.
         */
        protected StackManipulation toStackManipulation(MethodDescription instrumentedMethod, MethodDescription invokedMethod, TargetHandler.Resolved targetHandler) {
            List<ArgumentLoader> argumentLoaders = new ArrayList<ArgumentLoader>();
            for (ArgumentLoader.ArgumentProvider argumentProvider : argumentProviders) {
                argumentLoaders.addAll(argumentProvider.resolve(instrumentedMethod, invokedMethod));
            }
            ParameterList<?> parameters = invokedMethod.getParameters();
            if (parameters.size() != argumentLoaders.size()) {
                throw new IllegalStateException(invokedMethod + " does not accept " + argumentLoaders.size() + " arguments");
            }
            Iterator<? extends ParameterDescription> parameterIterator = parameters.iterator();
            List<StackManipulation> argumentInstructions = new ArrayList<StackManipulation>(argumentLoaders.size());
            for (ArgumentLoader argumentLoader : argumentLoaders) {
                argumentInstructions.add(argumentLoader.toStackManipulation(parameterIterator.next(), assigner, typing));
            }
            return new StackManipulation.Compound(
                    targetHandler.toStackManipulation(invokedMethod, assigner, typing),
                    new StackManipulation.Compound(argumentInstructions),
                    methodInvoker.toStackManipulation(invokedMethod, implementationTarget),
                    terminationHandler.toStackManipulation(invokedMethod, instrumentedMethod, assigner, typing)
            );
        }
    }
}