ASM: a very small and fast Java bytecode manipulation framework
Copyright (c) 2000-2011 INRIA, France Telecom
All rights reserved.
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modification, are permitted provided that the following conditions
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   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holders nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.objectweb.asm.tree;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.TypePath;

A node that represents a class.
Author:
Eric Bruneton/**
 * A node that represents a class.
 * 
 * @author Eric Bruneton
 */
public class ClassNode extends ClassVisitor {

    
The class version.
/**
     * The class version.
     */
    public int version;

    
The class's access flags (see Opcodes). This field also indicates if the class is deprecated. /**
     * The class's access flags (see {@link org.objectweb.asm.Opcodes}). This
     * field also indicates if the class is deprecated.
     */
    public int access;

    
The internal name of the class (see getInternalName). /**
     * The internal name of the class (see
     * {@link org.objectweb.asm.Type#getInternalName() getInternalName}).
     */
    public String name;

    
The signature of the class. May be null.
/**
     * The signature of the class. May be <tt>null</tt>.
     */
    public String signature;

    
The internal of name of the super class (see getInternalName). For interfaces, the super class is Object. May be null, but only for the Object class. /**
     * The internal of name of the super class (see
     * {@link org.objectweb.asm.Type#getInternalName() getInternalName}). For
     * interfaces, the super class is {@link Object}. May be <tt>null</tt>, but
     * only for the {@link Object} class.
     */
    public String superName;

    
The internal names of the class's interfaces (see getInternalName). This list is a list of String objects. /**
     * The internal names of the class's interfaces (see
     * {@link org.objectweb.asm.Type#getInternalName() getInternalName}). This
     * list is a list of {@link String} objects.
     */
    public List<String> interfaces;

    
The name of the source file from which this class was compiled. May be
null.
/**
     * The name of the source file from which this class was compiled. May be
     * <tt>null</tt>.
     */
    public String sourceFile;

    
Debug information to compute the correspondence between source and
compiled elements of the class. May be null.
/**
     * Debug information to compute the correspondence between source and
     * compiled elements of the class. May be <tt>null</tt>.
     */
    public String sourceDebug;

    
The internal name of the enclosing class of the class. May be
null.
/**
     * The internal name of the enclosing class of the class. May be
     * <tt>null</tt>.
     */
    public String outerClass;

    
The name of the method that contains the class, or null if the
class is not enclosed in a method.
/**
     * The name of the method that contains the class, or <tt>null</tt> if the
     * class is not enclosed in a method.
     */
    public String outerMethod;

    
The descriptor of the method that contains the class, or null if
the class is not enclosed in a method.
/**
     * The descriptor of the method that contains the class, or <tt>null</tt> if
     * the class is not enclosed in a method.
     */
    public String outerMethodDesc;

    
The runtime visible annotations of this class. This list is a list of AnnotationNode objects. May be null.
@associates
org.objectweb.asm.tree.AnnotationNode
@label
visible/**
     * The runtime visible annotations of this class. This list is a list of
     * {@link AnnotationNode} objects. May be <tt>null</tt>.
     * 
     * @associates org.objectweb.asm.tree.AnnotationNode
     * @label visible
     */
    public List<AnnotationNode> visibleAnnotations;

    
The runtime invisible annotations of this class. This list is a list of AnnotationNode objects. May be null.
@associates
org.objectweb.asm.tree.AnnotationNode
@label
invisible/**
     * The runtime invisible annotations of this class. This list is a list of
     * {@link AnnotationNode} objects. May be <tt>null</tt>.
     * 
     * @associates org.objectweb.asm.tree.AnnotationNode
     * @label invisible
     */
    public List<AnnotationNode> invisibleAnnotations;

    
The runtime visible type annotations of this class. This list is a list of TypeAnnotationNode objects. May be null.
@associates
org.objectweb.asm.tree.TypeAnnotationNode
@label
visible/**
     * The runtime visible type annotations of this class. This list is a list
     * of {@link TypeAnnotationNode} objects. May be <tt>null</tt>.
     * 
     * @associates org.objectweb.asm.tree.TypeAnnotationNode
     * @label visible
     */
    public List<TypeAnnotationNode> visibleTypeAnnotations;

    
The runtime invisible type annotations of this class. This list is a list of TypeAnnotationNode objects. May be null.
@associates
org.objectweb.asm.tree.TypeAnnotationNode
@label
invisible/**
     * The runtime invisible type annotations of this class. This list is a list
     * of {@link TypeAnnotationNode} objects. May be <tt>null</tt>.
     * 
     * @associates org.objectweb.asm.tree.TypeAnnotationNode
     * @label invisible
     */
    public List<TypeAnnotationNode> invisibleTypeAnnotations;

    
The non standard attributes of this class. This list is a list of Attribute objects. May be null.
@associates
org.objectweb.asm.Attribute/**
     * The non standard attributes of this class. This list is a list of
     * {@link Attribute} objects. May be <tt>null</tt>.
     * 
     * @associates org.objectweb.asm.Attribute
     */
    public List<Attribute> attrs;

    
Informations about the inner classes of this class. This list is a list of InnerClassNode objects. 
@associates
org.objectweb.asm.tree.InnerClassNode/**
     * Informations about the inner classes of this class. This list is a list
     * of {@link InnerClassNode} objects.
     * 
     * @associates org.objectweb.asm.tree.InnerClassNode
     */
    public List<InnerClassNode> innerClasses;

    
The fields of this class. This list is a list of FieldNode objects. 
@associates
org.objectweb.asm.tree.FieldNode/**
     * The fields of this class. This list is a list of {@link FieldNode}
     * objects.
     * 
     * @associates org.objectweb.asm.tree.FieldNode
     */
    public List<FieldNode> fields;

    
The methods of this class. This list is a list of MethodNode objects. 
@associates
org.objectweb.asm.tree.MethodNode/**
     * The methods of this class. This list is a list of {@link MethodNode}
     * objects.
     * 
     * @associates org.objectweb.asm.tree.MethodNode
     */
    public List<MethodNode> methods;

    
Constructs a new ClassNode. Subclasses must not use this
constructor. Instead, they must use the ClassNode(int) version. 
Throws:
IllegalStateException – 
            If a subclass calls this constructor./**
     * Constructs a new {@link ClassNode}. <i>Subclasses must not use this
     * constructor</i>. Instead, they must use the {@link #ClassNode(int)}
     * version.
     * 
     * @throws IllegalStateException
     *             If a subclass calls this constructor.
     */
    public ClassNode() {
        this(Opcodes.ASM5);
        if (getClass() != ClassNode.class) {
            throw new IllegalStateException();
        }
    }

    
Constructs a new ClassNode. 
Params:
api –  the ASM API version implemented by this visitor. Must be one of Opcodes.ASM4 or Opcodes.ASM5./**
     * Constructs a new {@link ClassNode}.
     * 
     * @param api
     *            the ASM API version implemented by this visitor. Must be one
     *            of {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
     */
    public ClassNode(final int api) {
        super(api);
        this.interfaces = new ArrayList<String>();
        this.innerClasses = new ArrayList<InnerClassNode>();
        this.fields = new ArrayList<FieldNode>();
        this.methods = new ArrayList<MethodNode>();
    }

    // ------------------------------------------------------------------------
    // Implementation of the ClassVisitor abstract class
    // ------------------------------------------------------------------------

    @Override
    public void visit(final int version, final int access, final String name,
            final String signature, final String superName,
            final String[] interfaces) {
        this.version = version;
        this.access = access;
        this.name = name;
        this.signature = signature;
        this.superName = superName;
        if (interfaces != null) {
            this.interfaces.addAll(Arrays.asList(interfaces));
        }
    }

    @Override
    public void visitSource(final String file, final String debug) {
        sourceFile = file;
        sourceDebug = debug;
    }

    @Override
    public void visitOuterClass(final String owner, final String name,
            final String desc) {
        outerClass = owner;
        outerMethod = name;
        outerMethodDesc = desc;
    }

    @Override
    public AnnotationVisitor visitAnnotation(final String desc,
            final boolean visible) {
        AnnotationNode an = new AnnotationNode(desc);
        if (visible) {
            if (visibleAnnotations == null) {
                visibleAnnotations = new ArrayList<AnnotationNode>(1);
            }
            visibleAnnotations.add(an);
        } else {
            if (invisibleAnnotations == null) {
                invisibleAnnotations = new ArrayList<AnnotationNode>(1);
            }
            invisibleAnnotations.add(an);
        }
        return an;
    }

    @Override
    public AnnotationVisitor visitTypeAnnotation(int typeRef,
            TypePath typePath, String desc, boolean visible) {
        TypeAnnotationNode an = new TypeAnnotationNode(typeRef, typePath, desc);
        if (visible) {
            if (visibleTypeAnnotations == null) {
                visibleTypeAnnotations = new ArrayList<TypeAnnotationNode>(1);
            }
            visibleTypeAnnotations.add(an);
        } else {
            if (invisibleTypeAnnotations == null) {
                invisibleTypeAnnotations = new ArrayList<TypeAnnotationNode>(1);
            }
            invisibleTypeAnnotations.add(an);
        }
        return an;
    }

    @Override
    public void visitAttribute(final Attribute attr) {
        if (attrs == null) {
            attrs = new ArrayList<Attribute>(1);
        }
        attrs.add(attr);
    }

    @Override
    public void visitInnerClass(final String name, final String outerName,
            final String innerName, final int access) {
        InnerClassNode icn = new InnerClassNode(name, outerName, innerName,
                access);
        innerClasses.add(icn);
    }

    @Override
    public FieldVisitor visitField(final int access, final String name,
            final String desc, final String signature, final Object value) {
        FieldNode fn = new FieldNode(access, name, desc, signature, value);
        fields.add(fn);
        return fn;
    }

    @Override
    public MethodVisitor visitMethod(final int access, final String name,
            final String desc, final String signature, final String[] exceptions) {
        MethodNode mn = new MethodNode(access, name, desc, signature,
                exceptions);
        methods.add(mn);
        return mn;
    }

    @Override
    public void visitEnd() {
    }

    // ------------------------------------------------------------------------
    // Accept method
    // ------------------------------------------------------------------------

    
Checks that this class node is compatible with the given ASM API version.
This methods checks that this node, and all its nodes recursively, do not
contain elements that were introduced in more recent versions of the ASM
API than the given version.
Params:
api –  an ASM API version. Must be one of Opcodes.ASM4 or Opcodes.ASM5./**
     * Checks that this class node is compatible with the given ASM API version.
     * This methods checks that this node, and all its nodes recursively, do not
     * contain elements that were introduced in more recent versions of the ASM
     * API than the given version.
     * 
     * @param api
     *            an ASM API version. Must be one of {@link Opcodes#ASM4} or
     *            {@link Opcodes#ASM5}.
     */
    public void check(final int api) {
        if (api == Opcodes.ASM4) {
            if (visibleTypeAnnotations != null
                    && visibleTypeAnnotations.size() > 0) {
                throw new RuntimeException();
            }
            if (invisibleTypeAnnotations != null
                    && invisibleTypeAnnotations.size() > 0) {
                throw new RuntimeException();
            }
            for (FieldNode f : fields) {
                f.check(api);
            }
            for (MethodNode m : methods) {
                m.check(api);
            }
        }
    }

    
Makes the given class visitor visit this class.
Params:
cv – 
           a class visitor./**
     * Makes the given class visitor visit this class.
     * 
     * @param cv
     *            a class visitor.
     */
    public void accept(final ClassVisitor cv) {
        // visits header
        String[] interfaces = new String[this.interfaces.size()];
        this.interfaces.toArray(interfaces);
        cv.visit(version, access, name, signature, superName, interfaces);
        // visits source
        if (sourceFile != null || sourceDebug != null) {
            cv.visitSource(sourceFile, sourceDebug);
        }
        // visits outer class
        if (outerClass != null) {
            cv.visitOuterClass(outerClass, outerMethod, outerMethodDesc);
        }
        // visits attributes
        int i, n;
        n = visibleAnnotations == null ? 0 : visibleAnnotations.size();
        for (i = 0; i < n; ++i) {
            AnnotationNode an = visibleAnnotations.get(i);
            an.accept(cv.visitAnnotation(an.desc, true));
        }
        n = invisibleAnnotations == null ? 0 : invisibleAnnotations.size();
        for (i = 0; i < n; ++i) {
            AnnotationNode an = invisibleAnnotations.get(i);
            an.accept(cv.visitAnnotation(an.desc, false));
        }
        n = visibleTypeAnnotations == null ? 0 : visibleTypeAnnotations.size();
        for (i = 0; i < n; ++i) {
            TypeAnnotationNode an = visibleTypeAnnotations.get(i);
            an.accept(cv.visitTypeAnnotation(an.typeRef, an.typePath, an.desc,
                    true));
        }
        n = invisibleTypeAnnotations == null ? 0 : invisibleTypeAnnotations
                .size();
        for (i = 0; i < n; ++i) {
            TypeAnnotationNode an = invisibleTypeAnnotations.get(i);
            an.accept(cv.visitTypeAnnotation(an.typeRef, an.typePath, an.desc,
                    false));
        }
        n = attrs == null ? 0 : attrs.size();
        for (i = 0; i < n; ++i) {
            cv.visitAttribute(attrs.get(i));
        }
        // visits inner classes
        for (i = 0; i < innerClasses.size(); ++i) {
            innerClasses.get(i).accept(cv);
        }
        // visits fields
        for (i = 0; i < fields.size(); ++i) {
            fields.get(i).accept(cv);
        }
        // visits methods
        for (i = 0; i < methods.size(); ++i) {
            methods.get(i).accept(cv);
        }
        // visits end
        cv.visitEnd();
    }
}