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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.analysis;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import javassist.CtBehavior;
import javassist.CtClass;
import javassist.CtField;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import cuchaz.enigma.mapping.ArgumentEntry;
import cuchaz.enigma.mapping.BehaviorEntry;
import cuchaz.enigma.mapping.ClassEntry;
import cuchaz.enigma.mapping.Entry;
import cuchaz.enigma.mapping.FieldEntry;
import cuchaz.enigma.mapping.EntryFactory;
import cuchaz.enigma.mapping.Translator;
public class TranslationIndex implements Serializable {
private static final long serialVersionUID = 738687982126844179L;
private Map<ClassEntry,ClassEntry> m_superclasses;
private Multimap<ClassEntry,FieldEntry> m_fieldEntries;
private Multimap<ClassEntry,BehaviorEntry> m_behaviorEntries;
public TranslationIndex() {
m_superclasses = Maps.newHashMap();
m_fieldEntries = HashMultimap.create();
m_behaviorEntries = HashMultimap.create();
}
public TranslationIndex(TranslationIndex other, Translator translator) {
// translate the superclasses
m_superclasses = Maps.newHashMap();
for (Map.Entry<ClassEntry,ClassEntry> mapEntry : other.m_superclasses.entrySet()) {
m_superclasses.put(
translator.translateEntry(mapEntry.getKey()),
translator.translateEntry(mapEntry.getValue())
);
}
// translate the fields
m_fieldEntries = HashMultimap.create();
for (Map.Entry<ClassEntry,FieldEntry> mapEntry : other.m_fieldEntries.entries()) {
m_fieldEntries.put(
translator.translateEntry(mapEntry.getKey()),
translator.translateEntry(mapEntry.getValue())
);
}
m_behaviorEntries = HashMultimap.create();
for (Map.Entry<ClassEntry,BehaviorEntry> mapEntry : other.m_behaviorEntries.entries()) {
m_behaviorEntries.put(
translator.translateEntry(mapEntry.getKey()),
translator.translateEntry(mapEntry.getValue())
);
}
}
public void indexClass(CtClass c) {
ClassEntry classEntry = EntryFactory.getClassEntry(c);
// add the superclass
ClassEntry superclassEntry = EntryFactory.getSuperclassEntry(c);
if (!isJre(classEntry) && superclassEntry != null && !isJre(superclassEntry)) {
m_superclasses.put(classEntry, superclassEntry);
}
// add fields
for (CtField field : c.getDeclaredFields()) {
FieldEntry fieldEntry = EntryFactory.getFieldEntry(field);
m_fieldEntries.put(fieldEntry.getClassEntry(), fieldEntry);
}
// add behaviors
for (CtBehavior behavior : c.getDeclaredBehaviors()) {
BehaviorEntry behaviorEntry = EntryFactory.getBehaviorEntry(behavior);
m_behaviorEntries.put(behaviorEntry.getClassEntry(), behaviorEntry);
}
}
public void renameClasses(Map<String,String> renames) {
EntryRenamer.renameClassesInMap(renames, m_superclasses);
EntryRenamer.renameClassesInMultimap(renames, m_fieldEntries);
EntryRenamer.renameClassesInMultimap(renames, m_behaviorEntries);
}
public ClassEntry getSuperclass(ClassEntry classEntry) {
return m_superclasses.get(classEntry);
}
public List<ClassEntry> getAncestry(ClassEntry classEntry) {
List<ClassEntry> ancestors = Lists.newArrayList();
while (classEntry != null) {
classEntry = getSuperclass(classEntry);
if (classEntry != null) {
ancestors.add(classEntry);
}
}
return ancestors;
}
public List<ClassEntry> getSubclass(ClassEntry classEntry) {
// linear search is fast enough for now
List<ClassEntry> subclasses = Lists.newArrayList();
for (Map.Entry<ClassEntry,ClassEntry> entry : m_superclasses.entrySet()) {
ClassEntry subclass = entry.getKey();
ClassEntry superclass = entry.getValue();
if (classEntry.equals(superclass)) {
subclasses.add(subclass);
}
}
return subclasses;
}
public void getSubclassesRecursively(Set<ClassEntry> out, ClassEntry classEntry) {
for (ClassEntry subclassEntry : getSubclass(classEntry)) {
out.add(subclassEntry);
getSubclassesRecursively(out, subclassEntry);
}
}
public void getSubclassNamesRecursively(Set<String> out, ClassEntry classEntry) {
for (ClassEntry subclassEntry : getSubclass(classEntry)) {
out.add(subclassEntry.getName());
getSubclassNamesRecursively(out, subclassEntry);
}
}
public boolean entryExists(Entry entry) {
if (entry instanceof FieldEntry) {
return fieldExists((FieldEntry)entry);
} else if (entry instanceof BehaviorEntry) {
return behaviorExists((BehaviorEntry)entry);
} else if (entry instanceof ArgumentEntry) {
return behaviorExists(((ArgumentEntry)entry).getBehaviorEntry());
}
throw new IllegalArgumentException("Cannot check existence for " + entry.getClass());
}
public boolean fieldExists(FieldEntry fieldEntry) {
return m_fieldEntries.containsEntry(fieldEntry.getClassEntry(), fieldEntry);
}
public boolean behaviorExists(BehaviorEntry behaviorEntry) {
return m_behaviorEntries.containsEntry(behaviorEntry.getClassEntry(), behaviorEntry);
}
public ClassEntry resolveEntryClass(Entry entry) {
if (entry instanceof ClassEntry) {
return (ClassEntry)entry;
}
// this entry could refer to a method on a class where the method is not actually implemented
// travel up the inheritance tree to find the closest implementation
while (!entryExists(entry)) {
// is there a parent class?
ClassEntry superclassEntry = getSuperclass(entry.getClassEntry());
if (superclassEntry == null) {
// this is probably a method from a class in a library
// we can't trace the implementation up any higher unless we index the library
return null;
}
// move up to the parent class
entry = entry.cloneToNewClass(superclassEntry);
}
return entry.getClassEntry();
}
private boolean isJre(ClassEntry classEntry) {
String packageName = classEntry.getPackageName();
return packageName != null && (packageName.startsWith("java") || packageName.startsWith("javax"));
}
public void write(OutputStream out)
throws IOException {
GZIPOutputStream gzipout = new GZIPOutputStream(out);
ObjectOutputStream oout = new ObjectOutputStream(gzipout);
oout.writeObject(m_superclasses);
oout.writeObject(m_fieldEntries);
oout.writeObject(m_behaviorEntries);
gzipout.finish();
}
@SuppressWarnings("unchecked")
public void read(InputStream in)
throws IOException {
try {
ObjectInputStream oin = new ObjectInputStream(new GZIPInputStream(in));
m_superclasses = (HashMap<ClassEntry,ClassEntry>)oin.readObject();
m_fieldEntries = (HashMultimap<ClassEntry,FieldEntry>)oin.readObject();
m_behaviorEntries = (HashMultimap<ClassEntry,BehaviorEntry>)oin.readObject();
} catch (ClassNotFoundException ex) {
throw new Error(ex);
}
}
}
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