oops, don't depend on local procyon project

1 files changed, 141 insertions, 0 deletions

diff --git a/src/cuchaz/enigma/bytecode/ClassTranslator.java b/src/cuchaz/enigma/bytecode/ClassTranslator.java
new file mode 100644
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--- /dev/null
+++ b/src/cuchaz/enigma/bytecode/ClassTranslator.java
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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 javassist.CtBehavior;
+import javassist.CtClass;
+import javassist.CtField;
+import javassist.CtMethod;
+import javassist.bytecode.ConstPool;
+import javassist.bytecode.Descriptor;
+import javassist.bytecode.SourceFileAttribute;
+
+import com.google.common.collect.Maps;
+
+import cuchaz.enigma.mapping.BehaviorEntry;
+import cuchaz.enigma.mapping.BehaviorEntryFactory;
+import cuchaz.enigma.mapping.ClassEntry;
+import cuchaz.enigma.mapping.FieldEntry;
+import cuchaz.enigma.mapping.MethodEntry;
+import cuchaz.enigma.mapping.Translator;
+
+public class ClassTranslator {
+        
+        private Translator m_translator;
+        
+        public ClassTranslator(Translator translator) {
+                m_translator = translator;
+        }
+        
+        public void translate(CtClass c) {
+                
+                // NOTE: the order of these translations is very important
+                
+                // translate all the field and method references in the code by editing the constant pool
+                ConstPool constants = c.getClassFile().getConstPool();
+                ConstPoolEditor editor = new ConstPoolEditor(constants);
+                for (int i = 1; i < constants.getSize(); i++) {
+                        switch (constants.getTag(i)) {
+                                
+                                case ConstPool.CONST_Fieldref: {
+                                        
+                                        // translate the name
+                                        FieldEntry entry = new FieldEntry(
+                                                new ClassEntry(Descriptor.toJvmName(constants.getFieldrefClassName(i))),
+                                                constants.getFieldrefName(i)
+                                        );
+                                        FieldEntry translatedEntry = m_translator.translateEntry(entry);
+                                        
+                                        // translate the type
+                                        String type = constants.getFieldrefType(i);
+                                        String translatedType = m_translator.translateSignature(type);
+                                        
+                                        if (!entry.equals(translatedEntry) || !type.equals(translatedType)) {
+                                                editor.changeMemberrefNameAndType(i, translatedEntry.getName(), translatedType);
+                                        }
+                                }
+                                break;
+                                
+                                case ConstPool.CONST_Methodref:
+                                case ConstPool.CONST_InterfaceMethodref: {
+                                        
+                                        // translate the name and type
+                                        BehaviorEntry entry = BehaviorEntryFactory.create(
+                                                Descriptor.toJvmName(editor.getMemberrefClassname(i)),
+                                                editor.getMemberrefName(i),
+                                                editor.getMemberrefType(i)
+                                        );
+                                        BehaviorEntry translatedEntry = m_translator.translateEntry(entry);
+                                        
+                                        if (!entry.getName().equals(translatedEntry.getName()) || !entry.getSignature().equals(translatedEntry.getSignature())) {
+                                                editor.changeMemberrefNameAndType(i, translatedEntry.getName(), translatedEntry.getSignature());
+                                        }
+                                }
+                                break;
+                        }
+                }
+                
+                ClassEntry classEntry = new ClassEntry(Descriptor.toJvmName(c.getName()));
+                
+                // translate all the fields
+                for (CtField field : c.getDeclaredFields()) {
+                        
+                        // translate the name
+                        FieldEntry entry = new FieldEntry(classEntry, field.getName());
+                        String translatedName = m_translator.translate(entry);
+                        if (translatedName != null) {
+                                field.setName(translatedName);
+                        }
+                        
+                        // translate the type
+                        String translatedType = m_translator.translateSignature(field.getFieldInfo().getDescriptor());
+                        field.getFieldInfo().setDescriptor(translatedType);
+                }
+                
+                // translate all the methods and constructors
+                for (CtBehavior behavior : c.getDeclaredBehaviors()) {
+                        if (behavior instanceof CtMethod) {
+                                CtMethod method = (CtMethod)behavior;
+                                
+                                // translate the name
+                                MethodEntry entry = new MethodEntry(classEntry, method.getName(), method.getSignature());
+                                String translatedName = m_translator.translate(entry);
+                                if (translatedName != null) {
+                                        method.setName(translatedName);
+                                }
+                        }
+                        
+                        // translate the type
+                        String translatedSignature = m_translator.translateSignature(behavior.getMethodInfo().getDescriptor());
+                        behavior.getMethodInfo().setDescriptor(translatedSignature);
+                }
+                
+                // translate all the class names referenced in the code
+                // the above code only changed method/field/reference names and types, but not the class names themselves
+                Map<ClassEntry,ClassEntry> map = Maps.newHashMap();
+                for (ClassEntry obfClassEntry : ClassRenamer.getAllClassEntries(c)) {
+                        ClassEntry deobfClassEntry = m_translator.translateEntry(obfClassEntry);
+                        if (!obfClassEntry.equals(deobfClassEntry)) {
+                                map.put(obfClassEntry, deobfClassEntry);
+                        }
+                }
+                ClassRenamer.renameClasses(c, map);
+                
+                // translate the source file attribute too
+                ClassEntry deobfClassEntry = map.get(classEntry);
+                if (deobfClassEntry != null) {
+                        String sourceFile = Descriptor.toJvmName(deobfClassEntry.getOuterClassName()) + ".java";
+                        c.getClassFile().addAttribute(new SourceFileAttribute(constants, sourceFile));
+                }
+        }
+}