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
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
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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.optimizer;

import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.TypePath;

An MethodVisitor that collects the Constants of the methods it visits. 
Author:
Eric Bruneton/**
 * An {@link MethodVisitor} that collects the {@link Constant}s of the methods
 * it visits.
 * 
 * @author Eric Bruneton
 */
public class MethodConstantsCollector extends MethodVisitor {

    private final ConstantPool cp;

    public MethodConstantsCollector(final MethodVisitor mv,
            final ConstantPool cp) {
        super(Opcodes.ASM5, mv);
        this.cp = cp;
    }

    @Override
    public void visitParameter(String name, int access) {
        cp.newUTF8("MethodParameters");
        if (name != null) {
            cp.newUTF8(name);
        }
        mv.visitParameter(name, access);
    }

    @Override
    public AnnotationVisitor visitAnnotationDefault() {
        cp.newUTF8("AnnotationDefault");
        return new AnnotationConstantsCollector(mv.visitAnnotationDefault(), cp);
    }

    @Override
    public AnnotationVisitor visitAnnotation(final String desc,
            final boolean visible) {
        cp.newUTF8(desc);
        if (visible) {
            cp.newUTF8("RuntimeVisibleAnnotations");
        } else {
            cp.newUTF8("RuntimeInvisibleAnnotations");
        }
        return new AnnotationConstantsCollector(mv.visitAnnotation(desc,
                visible), cp);
    }

    @Override
    public AnnotationVisitor visitTypeAnnotation(int typeRef,
            TypePath typePath, String desc, boolean visible) {
        cp.newUTF8(desc);
        if (visible) {
            cp.newUTF8("RuntimeVisibleTypeAnnotations");
        } else {
            cp.newUTF8("RuntimeInvisibleTypeAnnotations");
        }
        return new AnnotationConstantsCollector(mv.visitAnnotation(desc,
                visible), cp);
    }

    @Override
    public AnnotationVisitor visitParameterAnnotation(final int parameter,
            final String desc, final boolean visible) {
        cp.newUTF8(desc);
        if (visible) {
            cp.newUTF8("RuntimeVisibleParameterAnnotations");
        } else {
            cp.newUTF8("RuntimeInvisibleParameterAnnotations");
        }
        return new AnnotationConstantsCollector(mv.visitParameterAnnotation(
                parameter, desc, visible), cp);
    }

    @Override
    public void visitTypeInsn(final int opcode, final String type) {
        cp.newClass(type);
        mv.visitTypeInsn(opcode, type);
    }

    @Override
    public void visitFieldInsn(final int opcode, final String owner,
            final String name, final String desc) {
        cp.newField(owner, name, desc);
        mv.visitFieldInsn(opcode, owner, name, desc);
    }

    @Override
    public void visitMethodInsn(final int opcode, final String owner,
            final String name, final String desc, final boolean itf) {
        cp.newMethod(owner, name, desc, itf);
        mv.visitMethodInsn(opcode, owner, name, desc, itf);
    }

    @Override
    public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
            Object... bsmArgs) {
        cp.newInvokeDynamic(name, desc, bsm, bsmArgs);
        mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    }

    @Override
    public void visitLdcInsn(final Object cst) {
        cp.newConst(cst);
        mv.visitLdcInsn(cst);
    }

    @Override
    public void visitMultiANewArrayInsn(final String desc, final int dims) {
        cp.newClass(desc);
        mv.visitMultiANewArrayInsn(desc, dims);
    }

    @Override
    public AnnotationVisitor visitInsnAnnotation(int typeRef,
            TypePath typePath, String desc, boolean visible) {
        cp.newUTF8(desc);
        if (visible) {
            cp.newUTF8("RuntimeVisibleTypeAnnotations");
        } else {
            cp.newUTF8("RuntimeInvisibleTypeAnnotations");
        }
        return new AnnotationConstantsCollector(mv.visitInsnAnnotation(typeRef,
                typePath, desc, visible), cp);
    }

    @Override
    public void visitTryCatchBlock(final Label start, final Label end,
            final Label handler, final String type) {
        if (type != null) {
            cp.newClass(type);
        }
        mv.visitTryCatchBlock(start, end, handler, type);
    }

    @Override
    public AnnotationVisitor visitTryCatchAnnotation(int typeRef,
            TypePath typePath, String desc, boolean visible) {
        cp.newUTF8(desc);
        if (visible) {
            cp.newUTF8("RuntimeVisibleTypeAnnotations");
        } else {
            cp.newUTF8("RuntimeInvisibleTypeAnnotations");
        }
        return new AnnotationConstantsCollector(mv.visitTryCatchAnnotation(
                typeRef, typePath, desc, visible), cp);
    }

    @Override
    public void visitLocalVariable(final String name, final String desc,
            final String signature, final Label start, final Label end,
            final int index) {
        if (signature != null) {
            cp.newUTF8("LocalVariableTypeTable");
            cp.newUTF8(name);
            cp.newUTF8(signature);
        }
        cp.newUTF8("LocalVariableTable");
        cp.newUTF8(name);
        cp.newUTF8(desc);
        mv.visitLocalVariable(name, desc, signature, start, end, index);
    }

    @Override
    public AnnotationVisitor visitLocalVariableAnnotation(int typeRef,
            TypePath typePath, Label[] start, Label[] end, int[] index,
            String desc, boolean visible) {
        cp.newUTF8(desc);
        if (visible) {
            cp.newUTF8("RuntimeVisibleTypeAnnotations");
        } else {
            cp.newUTF8("RuntimeInvisibleTypeAnnotations");
        }
        return new AnnotationConstantsCollector(
                mv.visitLocalVariableAnnotation(typeRef, typePath, start, end,
                        index, desc, visible), cp);
    }

    @Override
    public void visitLineNumber(final int line, final Label start) {
        cp.newUTF8("LineNumberTable");
        mv.visitLineNumber(line, start);
    }

    @Override
    public void visitMaxs(final int maxStack, final int maxLocals) {
        cp.newUTF8("Code");
        mv.visitMaxs(maxStack, maxLocals);
    }
}