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/*******************************************************************************
* Copyright (c) 2014 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Public License v3.0
* which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/gpl.html
*
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma.bytecode;
import java.util.Map;
import java.util.Set;
import javassist.ClassMap;
import javassist.CtBehavior;
import javassist.CtClass;
import javassist.bytecode.ConstPool;
import javassist.bytecode.Descriptor;
import javassist.bytecode.InnerClassesAttribute;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import cuchaz.enigma.mapping.ClassEntry;
import cuchaz.enigma.mapping.SignatureUpdater;
import cuchaz.enigma.mapping.SignatureUpdater.ClassNameUpdater;
public class ClassRenamer
{
public static void renameClasses( CtClass c, Map<ClassEntry,ClassEntry> map )
{
// build the map used by javassist
ClassMap nameMap = new ClassMap();
for( Map.Entry<ClassEntry,ClassEntry> entry : map.entrySet() )
{
nameMap.put( entry.getKey().getName(), entry.getValue().getName() );
}
c.replaceClassName( nameMap );
// replace simple names in the InnerClasses attribute too
ConstPool constants = c.getClassFile().getConstPool();
InnerClassesAttribute attr = (InnerClassesAttribute)c.getClassFile().getAttribute( InnerClassesAttribute.tag );
if( attr != null )
{
for( int i=0; i<attr.tableLength(); i++ )
{
ClassEntry classEntry = new ClassEntry( Descriptor.toJvmName( attr.innerClass( i ) ) );
if( attr.innerNameIndex( i ) != 0 )
{
attr.setInnerNameIndex( i, constants.addUtf8Info( classEntry.getInnerClassName() ) );
}
/* DEBUG
System.out.println( String.format( "\tDEOBF: %s-> ATTR: %s,%s,%s",
classEntry,
attr.outerClass( i ),
attr.innerClass( i ),
attr.innerName( i )
) );
*/
}
}
}
public static Set<ClassEntry> getAllClassEntries( final CtClass c )
{
// get the classes that javassist knows about
final Set<ClassEntry> entries = Sets.newHashSet();
ClassMap map = new ClassMap( )
{
@Override
public Object get( Object obj )
{
if( obj instanceof String )
{
String str = (String)obj;
// javassist throws a lot of weird things at this map
// I either have to implement my on class scanner, or just try to filter out the weirdness
// I'm opting to filter out the weirdness for now
// skip anything with generic arguments
if( str.indexOf( '<' ) >= 0 || str.indexOf( '>' ) >= 0 || str.indexOf( ';' ) >= 0 )
{
return null;
}
// convert path/to/class.inner to path/to/class$inner
str = str.replace( '.', '$' );
// remember everything else
entries.add( new ClassEntry( str ) );
}
return null;
}
private static final long serialVersionUID = -202160293602070641L;
};
c.replaceClassName( map );
return entries;
}
public static void moveAllClassesOutOfDefaultPackage( CtClass c, String newPackageName )
{
// rename all classes
Map<ClassEntry,ClassEntry> map = Maps.newHashMap();
for( ClassEntry classEntry : ClassRenamer.getAllClassEntries( c ) )
{
if( classEntry.isInDefaultPackage() )
{
map.put( classEntry, new ClassEntry( newPackageName + "/" + classEntry.getName() ) );
}
}
ClassRenamer.renameClasses( c, map );
// TEMP
for( ClassEntry classEntry : ClassRenamer.getAllClassEntries( c ) )
{
if( classEntry.isInDefaultPackage() )
{
throw new Error( "!!! " + classEntry );
}
}
// TEMP
for( CtBehavior behavior : c.getDeclaredBehaviors() )
{
if( behavior.getSignature() == null )
{
continue;
}
SignatureUpdater.update( behavior.getSignature(), new ClassNameUpdater( )
{
@Override
public String update( String className )
{
ClassEntry classEntry = new ClassEntry( className );
if( classEntry.isInDefaultPackage() )
{
throw new Error( "!!! " + className );
}
return className;
}
} );
}
}
}
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