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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 java.util.Stack;

import org.objectweb.asm.Opcodes;
import org.objectweb.asm.signature.SignatureVisitor;

/**
 * A {@link SignatureVisitor} adapter for type mapping.
 *
 * @author Eugene Kuleshov
 */
public class SignatureRemapper extends SignatureVisitor {

  private final SignatureVisitor v;

  private final Remapper remapper;

  private Stack classNames = new Stack();

  public SignatureRemapper(final SignatureVisitor v, final Remapper remapper) {
    this(Opcodes.ASM6, v, remapper);
  }

  protected SignatureRemapper(final int api, final SignatureVisitor v, final Remapper remapper) {
    super(api);
    this.v = v;
    this.remapper = remapper;
  }

  @Override
  public void visitClassType(String name) {
    classNames.push(name);
    v.visitClassType(remapper.mapType(name));
  }

  @Override
  public void visitInnerClassType(String name) {
    String outerClassName = classNames.pop();
    String className = outerClassName + '$' + name;
    classNames.push(className);
    String remappedOuter = remapper.mapType(outerClassName) + '$';
    String remappedName = remapper.mapType(className);
    int index =
        remappedName.startsWith(remappedOuter)
            ? remappedOuter.length()
            : remappedName.lastIndexOf('$') + 1;
    v.visitInnerClassType(remappedName.substring(index));
  }

  @Override
  public void visitFormalTypeParameter(String name) {
    v.visitFormalTypeParameter(name);
  }

  @Override
  public void visitTypeVariable(String name) {
    v.visitTypeVariable(name);
  }

  @Override
  public SignatureVisitor visitArrayType() {
    v.visitArrayType();
    return this;
  }

  @Override
  public void visitBaseType(char descriptor) {
    v.visitBaseType(descriptor);
  }

  @Override
  public SignatureVisitor visitClassBound() {
    v.visitClassBound();
    return this;
  }

  @Override
  public SignatureVisitor visitExceptionType() {
    v.visitExceptionType();
    return this;
  }

  @Override
  public SignatureVisitor visitInterface() {
    v.visitInterface();
    return this;
  }

  @Override
  public SignatureVisitor visitInterfaceBound() {
    v.visitInterfaceBound();
    return this;
  }

  @Override
  public SignatureVisitor visitParameterType() {
    v.visitParameterType();
    return this;
  }

  @Override
  public SignatureVisitor visitReturnType() {
    v.visitReturnType();
    return this;
  }

  @Override
  public SignatureVisitor visitSuperclass() {
    v.visitSuperclass();
    return this;
  }

  @Override
  public void visitTypeArgument() {
    v.visitTypeArgument();
  }

  @Override
  public SignatureVisitor visitTypeArgument(char wildcard) {
    v.visitTypeArgument(wildcard);
    return this;
  }

  @Override
  public void visitEnd() {
    v.visitEnd();
    classNames.pop();
  }
}