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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.convert;
import java.util.Arrays;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.jar.JarFile;
import com.google.common.collect.BiMap;
import com.google.common.collect.Maps;
import cuchaz.enigma.analysis.JarIndex;
import cuchaz.enigma.convert.ClassNamer.SidedClassNamer;
import cuchaz.enigma.mapping.ClassEntry;
import cuchaz.enigma.mapping.Mappings;
public class MappingsConverter {
public static Matches computeMatches(JarFile sourceJar, JarFile destJar, Mappings mappings) {
// index jars
System.out.println("Indexing source jar...");
JarIndex sourceIndex = new JarIndex();
sourceIndex.indexJar(sourceJar, false);
System.out.println("Indexing dest jar...");
JarIndex destIndex = new JarIndex();
destIndex.indexJar(destJar, false);
// compute the matching
ClassMatching matching = computeMatching(sourceJar, sourceIndex, destJar, destIndex);
return new Matches(matching.matches());
}
public static ClassMatching computeMatching(JarFile sourceJar, JarIndex sourceIndex, JarFile destJar, JarIndex destIndex) {
System.out.println("Iteratively matching classes");
ClassMatching lastMatching = null;
int round = 0;
SidedClassNamer sourceNamer = null;
SidedClassNamer destNamer = null;
for (boolean useReferences : Arrays.asList(false, true)) {
int numUniqueMatchesLastTime = 0;
if (lastMatching != null) {
numUniqueMatchesLastTime = lastMatching.uniqueMatches().size();
}
while (true) {
System.out.println("Round " + (++round) + "...");
// init the matching with identity settings
ClassMatching matching = new ClassMatching(
new ClassIdentifier(sourceJar, sourceIndex, sourceNamer, useReferences),
new ClassIdentifier(destJar, destIndex, destNamer, useReferences)
);
if (lastMatching == null) {
// search all classes
matching.match(sourceIndex.getObfClassEntries(), destIndex.getObfClassEntries());
} else {
// we already know about these matches
matching.addKnownMatches(lastMatching.uniqueMatches());
// search unmatched and ambiguously-matched classes
matching.match(lastMatching.unmatchedSourceClasses(), lastMatching.unmatchedDestClasses());
for (ClassMatch match : lastMatching.ambiguousMatches()) {
matching.match(match.sourceClasses, match.destClasses);
}
}
System.out.println(matching);
BiMap<ClassEntry,ClassEntry> uniqueMatches = matching.uniqueMatches();
// did we match anything new this time?
if (uniqueMatches.size() > numUniqueMatchesLastTime) {
numUniqueMatchesLastTime = uniqueMatches.size();
lastMatching = matching;
} else {
break;
}
// update the namers
ClassNamer namer = new ClassNamer(uniqueMatches);
sourceNamer = namer.getSourceNamer();
destNamer = namer.getDestNamer();
}
}
return lastMatching;
}
public static void convertMappings(Mappings mappings, BiMap<ClassEntry,ClassEntry> changes) {
// sort the changes so classes are renamed in the correct order
// ie. if we have the mappings a->b, b->c, we have to apply b->c before a->b
LinkedHashMap<ClassEntry,ClassEntry> sortedChanges = Maps.newLinkedHashMap();
int numChangesLeft = changes.size();
while (!changes.isEmpty()) {
Iterator<Map.Entry<ClassEntry,ClassEntry>> iter = changes.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<ClassEntry,ClassEntry> change = iter.next();
if (changes.containsKey(change.getValue())) {
sortedChanges.put(change.getKey(), change.getValue());
iter.remove();
}
}
// did we remove any changes?
if (numChangesLeft - changes.size() > 0) {
// keep going
numChangesLeft = changes.size();
} else {
// can't sort anymore. There must be a loop
break;
}
}
if (!changes.isEmpty()) {
throw new Error("Unable to sort class changes! There must be a cycle.");
}
// convert the mappings in the correct class order
for (Map.Entry<ClassEntry,ClassEntry> entry : sortedChanges.entrySet()) {
mappings.renameObfClass(entry.getKey().getName(), entry.getValue().getName());
}
}
/* TODO: after we get a mapping, check to see that the other entries match
public static void checkMethods() {
// check the method matches
System.out.println("Checking methods...");
for (ClassMapping classMapping : mappings.classes()) {
ClassEntry classEntry = new ClassEntry(classMapping.getObfFullName());
for (MethodMapping methodMapping : classMapping.methods()) {
// skip constructors
if (methodMapping.getObfName().equals("<init>")) {
continue;
}
MethodEntry methodEntry = new MethodEntry(
classEntry,
methodMapping.getObfName(),
methodMapping.getObfSignature()
);
if (!destIndex.containsObfBehavior(methodEntry)) {
System.err.println("WARNING: method doesn't match: " + methodEntry);
// TODO: show methods if needed
// show the available methods
System.err.println("\tAvailable dest methods:");
CtClass c = destLoader.loadClass(classMapping.getObfFullName());
for (CtBehavior behavior : c.getDeclaredBehaviors()) {
System.err.println("\t\t" + EntryFactory.getBehaviorEntry(behavior));
}
System.err.println("\tAvailable source methods:");
c = sourceLoader.loadClass(matchedClassNames.inverse().get(classMapping.getObfFullName()));
for (CtBehavior behavior : c.getDeclaredBehaviors()) {
System.err.println("\t\t" + EntryFactory.getBehaviorEntry(behavior));
}
}
}
}
System.out.println("Done!");
}
*/
}
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