001/*
002 * Forge Mod Loader
003 * Copyright (c) 2012-2013 cpw.
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser Public License v2.1
006 * which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
008 * 
009 * Contributors:
010 *     cpw - implementation
011 */
012
013package cpw.mods.fml.common.asm.transformers;
014
015import org.objectweb.asm.ClassReader;
016import org.objectweb.asm.ClassWriter;
017import org.objectweb.asm.Opcodes;
018import org.objectweb.asm.commons.RemappingClassAdapter;
019import org.objectweb.asm.tree.ClassNode;
020
021import cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper;
022import cpw.mods.fml.common.asm.transformers.deobf.FMLRemappingAdapter;
023import cpw.mods.fml.relauncher.IClassNameTransformer;
024import cpw.mods.fml.relauncher.IClassTransformer;
025
026public class DeobfuscationTransformer implements IClassTransformer, IClassNameTransformer {
027
028    @Override
029    public byte[] transform(String name, String transformedName, byte[] bytes)
030    {
031        if (bytes == null)
032        {
033            return null;
034        }
035        ClassReader classReader = new ClassReader(bytes);
036        ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS);
037        RemappingClassAdapter remapAdapter = new FMLRemappingAdapter(classWriter);
038        classReader.accept(remapAdapter, ClassReader.EXPAND_FRAMES);
039        return classWriter.toByteArray();
040    }
041
042    @Override
043    public String remapClassName(String name)
044    {
045        return FMLDeobfuscatingRemapper.INSTANCE.map(name.replace('.','/')).replace('/', '.');
046    }
047
048    @Override
049    public String unmapClassName(String name)
050    {
051        return FMLDeobfuscatingRemapper.INSTANCE.unmap(name.replace('.', '/')).replace('/','.');
052    }
053
054}