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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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