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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.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.ClassNameReplacer;
import cuchaz.enigma.mapping.ParameterizedType;
import cuchaz.enigma.mapping.Translator;
import cuchaz.enigma.mapping.Type;
public class ClassRenamer {
public static void renameClasses(CtClass c, final Translator translator) {
renameClasses(c, new ClassNameReplacer() {
@Override
public String replace(String className) {
ClassEntry entry = translator.translateEntry(new ClassEntry(className));
if (entry != null) {
return entry.getName();
}
return null;
}
});
}
public static void moveAllClassesOutOfDefaultPackage(CtClass c, final String newPackageName) {
renameClasses(c, new ClassNameReplacer() {
@Override
public String replace(String className) {
ClassEntry entry = new ClassEntry(className);
if (entry.isInDefaultPackage()) {
return newPackageName + "/" + entry.getName();
}
return null;
}
});
}
public static void moveAllClassesIntoDefaultPackage(CtClass c, final String oldPackageName) {
renameClasses(c, new ClassNameReplacer() {
@Override
public String replace(String className) {
ClassEntry entry = new ClassEntry(className);
if (entry.getPackageName().equals(oldPackageName)) {
return entry.getSimpleName();
}
return null;
}
});
}
public static void renameClasses(CtClass c, ClassNameReplacer replacer) {
Map<ParameterizedType,ParameterizedType> map = Maps.newHashMap();
for (ParameterizedType type : ClassRenamer.getAllClassTypes(c)) {
ParameterizedType renamedType = new ParameterizedType(type, replacer);
if (!type.equals(renamedType)) {
map.put(type, renamedType);
}
}
renameTypes(c, map);
}
public static Set<ParameterizedType> getAllClassTypes(final CtClass c) {
// TODO: might have to scan SignatureAttributes directly because javassist is buggy
// get the class types that javassist knows about
final Set<ParameterizedType> types = Sets.newHashSet();
ClassMap map = new ClassMap() {
@Override
public Object get(Object obj) {
if (obj instanceof String) {
String str = (String)obj;
// sometimes javasist gives us dot-separated classes... whadda hell?
str = str.replace('.', '/');
// skip weird types
boolean hasNestedParams = str.indexOf('<') >= 0 && str.indexOf('<', str.indexOf('<')+1) >= 0;
boolean hasWeirdChars = str.indexOf('*') >= 0 || str.indexOf('-') >= 0 || str.indexOf('+') >= 0;
if (hasNestedParams || hasWeirdChars) {
// TEMP
System.out.println("Skipped translating: " + str);
return null;
}
ParameterizedType type = new ParameterizedType(new Type("L" + str + ";"));
assert(type.isClass());
// TEMP
try {
type.getClassEntry();
} catch (Throwable t) {
// bad type
// TEMP
System.out.println("Skipped translating: " + str);
return null;
}
types.add(type);
}
return null;
}
private static final long serialVersionUID = -202160293602070641L;
};
c.replaceClassName(map);
return types;
}
public static void renameTypes(CtClass c, Map<ParameterizedType,ParameterizedType> map) {
// convert the type map to a javassist class map
ClassMap nameMap = new ClassMap();
for (Map.Entry<ParameterizedType,ParameterizedType> entry : map.entrySet()) {
String source = entry.getKey().toString();
String dest = entry.getValue().toString();
// don't forget to chop off the L ... ;
// javassist doesn't want it there
source = source.substring(1, source.length() - 1);
dest = dest.substring(1, dest.length() - 1);
nameMap.put(source, dest);
}
// replace!!
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++) {
// get the inner class full name (which has already been translated)
ClassEntry classEntry = new ClassEntry(Descriptor.toJvmName(attr.innerClass(i)));
if (attr.innerNameIndex(i) != 0) {
// update the inner name
attr.setInnerNameIndex(i, constants.addUtf8Info(classEntry.getInnermostClassName()));
}
/* DEBUG
System.out.println(String.format("\tDEOBF: %s-> ATTR: %s,%s,%s", classEntry, attr.outerClass(i), attr.innerClass(i), attr.innerName(i)));
*/
}
}
}
}
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