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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.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.ModuleVisitor;
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.ASM6, 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 ModuleVisitor visitModule(String name, int flags, String version) {
    ModuleVisitor mv = super.visitModule(remapper.mapModuleName(name), flags, version);
    return mv == null ? null : createModuleRemapper(mv);
  }

  @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 void visitAttribute(Attribute attr) {
    if (attr instanceof ModuleHashesAttribute) {
      ModuleHashesAttribute hashesAttr = new ModuleHashesAttribute();
      List modules = hashesAttr.modules;
      for (int i = 0; i < modules.size(); i++) {
        modules.set(i, remapper.mapModuleName(modules.get(i)));
      }
    }
    super.visitAttribute(attr);
  }

  @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(api, fv, remapper);
  }

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

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

  protected ModuleVisitor createModuleRemapper(ModuleVisitor mv) {
    return new ModuleRemapper(api, mv, remapper);
  }
}