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/*
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 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
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package jdk.internal.org.objectweb.asm.signature;

import jdk.internal.org.objectweb.asm.Opcodes;

A visitor to visit a generic signature. The methods of this interface must be called in one of the three following orders (the last one is the only valid order for a SignatureVisitor that is returned by a method of this interface):
  • ClassSignature = ( visitFormalTypeParameter visitClassBound? visitInterfaceBound* )* (visitSuperclass visitInterface* )
  • MethodSignature = ( visitFormalTypeParameter visitClassBound? visitInterfaceBound* )* (visitParameterType* visitReturnType visitExceptionType* )
  • TypeSignature = visitBaseType | visitTypeVariable | visitArrayType | ( visitClassType visitTypeArgument* ( visitInnerClassType visitTypeArgument* )* visitEnd ) )
Author:Thomas Hallgren, Eric Bruneton
/** * A visitor to visit a generic signature. The methods of this interface must be called in one of * the three following orders (the last one is the only valid order for a {@link SignatureVisitor} * that is returned by a method of this interface): * * <ul> * <li><i>ClassSignature</i> = ( {@code visitFormalTypeParameter} {@code visitClassBound}? {@code * visitInterfaceBound}* )* ({@code visitSuperclass} {@code visitInterface}* ) * <li><i>MethodSignature</i> = ( {@code visitFormalTypeParameter} {@code visitClassBound}? {@code * visitInterfaceBound}* )* ({@code visitParameterType}* {@code visitReturnType} {@code * visitExceptionType}* ) * <li><i>TypeSignature</i> = {@code visitBaseType} | {@code visitTypeVariable} | {@code * visitArrayType} | ( {@code visitClassType} {@code visitTypeArgument}* ( {@code * visitInnerClassType} {@code visitTypeArgument}* )* {@code visitEnd} ) ) * </ul> * * @author Thomas Hallgren * @author Eric Bruneton */
public abstract class SignatureVisitor {
Wildcard for an "extends" type argument.
/** Wildcard for an "extends" type argument. */
public static final char EXTENDS = '+';
Wildcard for a "super" type argument.
/** Wildcard for a "super" type argument. */
public static final char SUPER = '-';
Wildcard for a normal type argument.
/** Wildcard for a normal type argument. */
public static final char INSTANCEOF = '=';
The ASM API version implemented by this visitor. The value of this field must be one of Opcodes.ASM4, Opcodes.ASM5, Opcodes.ASM6 or Opcodes.ASM7.
/** * The ASM API version implemented by this visitor. The value of this field must be one of {@link * Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}. */
protected final int api;
Constructs a new SignatureVisitor.
Params:
/** * Constructs a new {@link SignatureVisitor}. * * @param api the ASM API version implemented by this visitor. Must be one of {@link * Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}. */
@SuppressWarnings("deprecation") public SignatureVisitor(final int api) { if (api != Opcodes.ASM8 && api != Opcodes.ASM7 && api != Opcodes.ASM6 && api != Opcodes.ASM5 && api != Opcodes.ASM4 && api != Opcodes.ASM9_EXPERIMENTAL) { throw new IllegalArgumentException("Unsupported api " + api); } this.api = api; }
Visits a formal type parameter.
Params:
  • name – the name of the formal parameter.
/** * Visits a formal type parameter. * * @param name the name of the formal parameter. */
public void visitFormalTypeParameter(final String name) {}
Visits the class bound of the last visited formal type parameter.
Returns:a non null visitor to visit the signature of the class bound.
/** * Visits the class bound of the last visited formal type parameter. * * @return a non null visitor to visit the signature of the class bound. */
public SignatureVisitor visitClassBound() { return this; }
Visits an interface bound of the last visited formal type parameter.
Returns:a non null visitor to visit the signature of the interface bound.
/** * Visits an interface bound of the last visited formal type parameter. * * @return a non null visitor to visit the signature of the interface bound. */
public SignatureVisitor visitInterfaceBound() { return this; }
Visits the type of the super class.
Returns:a non null visitor to visit the signature of the super class type.
/** * Visits the type of the super class. * * @return a non null visitor to visit the signature of the super class type. */
public SignatureVisitor visitSuperclass() { return this; }
Visits the type of an interface implemented by the class.
Returns:a non null visitor to visit the signature of the interface type.
/** * Visits the type of an interface implemented by the class. * * @return a non null visitor to visit the signature of the interface type. */
public SignatureVisitor visitInterface() { return this; }
Visits the type of a method parameter.
Returns:a non null visitor to visit the signature of the parameter type.
/** * Visits the type of a method parameter. * * @return a non null visitor to visit the signature of the parameter type. */
public SignatureVisitor visitParameterType() { return this; }
Visits the return type of the method.
Returns:a non null visitor to visit the signature of the return type.
/** * Visits the return type of the method. * * @return a non null visitor to visit the signature of the return type. */
public SignatureVisitor visitReturnType() { return this; }
Visits the type of a method exception.
Returns:a non null visitor to visit the signature of the exception type.
/** * Visits the type of a method exception. * * @return a non null visitor to visit the signature of the exception type. */
public SignatureVisitor visitExceptionType() { return this; }
Visits a signature corresponding to a primitive type.
Params:
  • descriptor – the descriptor of the primitive type, or 'V' for void .
/** * Visits a signature corresponding to a primitive type. * * @param descriptor the descriptor of the primitive type, or 'V' for {@code void} . */
public void visitBaseType(final char descriptor) {}
Visits a signature corresponding to a type variable.
Params:
  • name – the name of the type variable.
/** * Visits a signature corresponding to a type variable. * * @param name the name of the type variable. */
public void visitTypeVariable(final String name) {}
Visits a signature corresponding to an array type.
Returns:a non null visitor to visit the signature of the array element type.
/** * Visits a signature corresponding to an array type. * * @return a non null visitor to visit the signature of the array element type. */
public SignatureVisitor visitArrayType() { return this; }
Starts the visit of a signature corresponding to a class or interface type.
Params:
  • name – the internal name of the class or interface.
/** * Starts the visit of a signature corresponding to a class or interface type. * * @param name the internal name of the class or interface. */
public void visitClassType(final String name) {}
Visits an inner class.
Params:
  • name – the local name of the inner class in its enclosing class.
/** * Visits an inner class. * * @param name the local name of the inner class in its enclosing class. */
public void visitInnerClassType(final String name) {}
Visits an unbounded type argument of the last visited class or inner class type.
/** Visits an unbounded type argument of the last visited class or inner class type. */
public void visitTypeArgument() {}
Visits a type argument of the last visited class or inner class type.
Params:
  • wildcard – '+', '-' or '='.
Returns:a non null visitor to visit the signature of the type argument.
/** * Visits a type argument of the last visited class or inner class type. * * @param wildcard '+', '-' or '='. * @return a non null visitor to visit the signature of the type argument. */
public SignatureVisitor visitTypeArgument(final char wildcard) { return this; }
Ends the visit of a signature corresponding to a class or interface type.
/** Ends the visit of a signature corresponding to a class or interface type. */
public void visitEnd() {} }