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ASM, a very small and fast Java bytecode manipulation framework
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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.commons;

import org.objectweb.asm.AnnotationVisitor;
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 {@link ClassVisitor} for type remapping.
 * 
 * @author Eugene Kuleshov
 */
public class ClassRemapper extends ClassVisitor {

    protected final Remapper remapper;

    protected String className;

    public ClassRemapper(final ClassVisitor cv, final Remapper remapper) {
        this(Opcodes.ASM5, cv, remapper);
    }

    protected ClassRemapper(final int api, final ClassVisitor cv,
            final Remapper remapper) {
        super(api, cv);
        this.remapper = remapper;
    }

    @Override
    public void visit(int version, int access, String name, String signature,
            String superName, String[] interfaces) {
        this.className = name;
        super.visit(version, access, remapper.mapType(name), remapper
                .mapSignature(signature, false), remapper.mapType(superName),
                interfaces == null ? null : remapper.mapTypes(interfaces));
    }

    @Override
    public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
        AnnotationVisitor av = super.visitAnnotation(remapper.mapDesc(desc),
                visible);
        return av == null ? null : createAnnotationRemapper(av);
    }

    @Override
    public AnnotationVisitor visitTypeAnnotation(int typeRef,
            TypePath typePath, String desc, boolean visible) {
        AnnotationVisitor av = super.visitTypeAnnotation(typeRef, typePath,
                remapper.mapDesc(desc), visible);
        return av == null ? null : createAnnotationRemapper(av);
    }

    @Override
    public FieldVisitor visitField(int access, String name, String desc,
            String signature, Object value) {
        FieldVisitor fv = super.visitField(access,
                remapper.mapFieldName(className, name, desc),
                remapper.mapDesc(desc), remapper.mapSignature(signature, true),
                remapper.mapValue(value));
        return fv == null ? null : createFieldRemapper(fv);
    }

    @Override
    public MethodVisitor visitMethod(int access, String name, String desc,
            String signature, String[] exceptions) {
        String newDesc = remapper.mapMethodDesc(desc);
        MethodVisitor mv = super.visitMethod(access, remapper.mapMethodName(
                className, name, desc), newDesc, remapper.mapSignature(
                signature, false),
                exceptions == null ? null : remapper.mapTypes(exceptions));
        return mv == null ? null : createMethodRemapper(mv);
    }

    @Override
    public void visitInnerClass(String name, String outerName,
            String innerName, int access) {
        // TODO should innerName be changed?
        super.visitInnerClass(remapper.mapType(name), outerName == null ? null
                : remapper.mapType(outerName), innerName, access);
    }

    @Override
    public void visitOuterClass(String owner, String name, String desc) {
        super.visitOuterClass(remapper.mapType(owner), name == null ? null
                : remapper.mapMethodName(owner, name, desc),
                desc == null ? null : remapper.mapMethodDesc(desc));
    }

    protected FieldVisitor createFieldRemapper(FieldVisitor fv) {
        return new FieldRemapper(fv, remapper);
    }

    protected MethodVisitor createMethodRemapper(MethodVisitor mv) {
        return new MethodRemapper(mv, remapper);
    }

    protected AnnotationVisitor createAnnotationRemapper(AnnotationVisitor av) {
        return new AnnotationRemapper(av, remapper);
    }
}