ASM Based Class Translator (#1)

* Initial port to ASM

* Package updates

* Annotation + inner class translation

* Fix inner class mapping

* More bytecode translation

* Signature refactoring

* Fix highlighting of mapped names

* Fix parameter name offset

* Fix anonymous class generation

* Fix issues with inner class signature transformation

* Fix bridged method detection

* Fix compile issues

* Resolve all failed tests

* Apply deobfuscated name to transformed classes

* Fix class signatures not being translated

* Fix frame array type translation

* Fix frame array type translation

* Fix array translation in method calls

* Fix method reference and bridge detection

* Fix handling of null deobf mappings

* Parameter translation in interfaces

* Fix enum parameter index offset

* Fix parsed local variable indexing

* Fix stackoverflow on rebuilding method names

* Ignore invalid decompiled variable indices

* basic source jar

* Output directly to file on source export

* Make decompile parallel

* fix incorrect super calls

* Use previous save state to delete old mapping files

* Fix old mappings not properly being removed

* Fix old mappings not properly being removed

* make isMethodProvider public

(cherry picked from commit ebad6a9)

* speed up Deobfuscator's getSources by using a single TranslatingTypeloader and caching the ClassLoaderTypeloader

* ignore .idea project folders

* move SynchronizedTypeLoader to a non-inner

* fix signature remap of inners for now

* index & resolve method/field references for usages view

* Allow reader/writer subclasses to provide the underlying file operations

* fix giving obf classes a name not removing them from the panel

* buffer the ParsedJar class entry inputstream, allow use with a jarinputstream

* make CachingClasspathTypeLoader public

* make CachingClasspathTypeLoader public

* support enum switches with obfuscated SwitchMaps

1 files changed, 131 insertions, 79 deletions

diff --git a/src/main/java/cuchaz/enigma/mapping/ClassMapping.java b/src/main/java/cuchaz/enigma/mapping/ClassMapping.java
index 51751ca..8f3f2b2 100644
--- a/src/main/java/cuchaz/enigma/mapping/ClassMapping.java
+++ b/src/main/java/cuchaz/enigma/mapping/ClassMapping.java
@@ -12,6 +12,9 @@
 package cuchaz.enigma.mapping;
 
 import com.google.common.collect.Maps;
+import cuchaz.enigma.mapping.entry.ClassEntry;
+import cuchaz.enigma.mapping.entry.FieldEntry;
+import cuchaz.enigma.mapping.entry.MethodEntry;
 import cuchaz.enigma.throwables.MappingConflict;
 
 import java.util.ArrayList;
@@ -34,7 +37,6 @@ public class ClassMapping implements Comparable<ClassMapping> {
         private Map<String, MethodMapping> methodsByDeobf;
         private boolean isDirty;
         private Mappings.EntryModifier modifier;
-        private boolean deobfInner;
 
         public ClassMapping(String obfFullName) {
                 this(obfFullName, null, Mappings.EntryModifier.UNCHANGED);
@@ -81,6 +83,10 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 return deobfName;
         }
 
+        public String getTranslatedName(TranslationDirection direction) {
+                return direction.choose(deobfName, obfFullName);
+        }
+
         //// INNER CLASSES ////////
 
         public void setDeobfName(String val) {
@@ -191,21 +197,21 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 return fieldsByObf.values();
         }
 
-        public boolean containsObfField(String obfName, Type obfType) {
-                return fieldsByObf.containsKey(getFieldKey(obfName, obfType));
+        public boolean containsObfField(String obfName, TypeDescriptor obfDesc) {
+                return fieldsByObf.containsKey(getFieldKey(obfName, obfDesc));
         }
 
-        public boolean containsDeobfField(String deobfName, Type deobfType) {
-                return fieldsByDeobf.containsKey(getFieldKey(deobfName, deobfType));
+        public boolean containsDeobfField(String deobfName, TypeDescriptor deobfDesc) {
+                return fieldsByDeobf.containsKey(getFieldKey(deobfName, deobfDesc));
         }
 
         public void addFieldMapping(FieldMapping fieldMapping) {
-                String obfKey = getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfType());
+                String obfKey = getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfDesc());
                 if (fieldsByObf.containsKey(obfKey)) {
                         throw new Error("Already have mapping for " + obfFullName + "." + obfKey);
                 }
                 if (fieldMapping.getDeobfName() != null) {
-                        String deobfKey = getFieldKey(fieldMapping.getDeobfName(), fieldMapping.getObfType());
+                        String deobfKey = getFieldKey(fieldMapping.getDeobfName(), fieldMapping.getObfDesc());
                         if (fieldsByDeobf.containsKey(deobfKey)) {
                                 throw new Error("Already have mapping for " + deobfName + "." + deobfKey);
                         }
@@ -218,63 +224,67 @@ public class ClassMapping implements Comparable<ClassMapping> {
         }
 
         public void removeFieldMapping(FieldMapping fieldMapping) {
-                boolean obfWasRemoved = fieldsByObf.remove(getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfType())) != null;
+                boolean obfWasRemoved = fieldsByObf.remove(getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfDesc())) != null;
                 assert (obfWasRemoved);
                 if (fieldMapping.getDeobfName() != null) {
-                        boolean deobfWasRemoved = fieldsByDeobf.remove(getFieldKey(fieldMapping.getDeobfName(), fieldMapping.getObfType())) != null;
+                        boolean deobfWasRemoved = fieldsByDeobf.remove(getFieldKey(fieldMapping.getDeobfName(), fieldMapping.getObfDesc())) != null;
                         assert (deobfWasRemoved);
                 }
                 this.isDirty = true;
         }
 
-        public FieldMapping getFieldByObf(String obfName, Type obfType) {
-                return fieldsByObf.get(getFieldKey(obfName, obfType));
+        public FieldMapping getFieldByObf(String obfName, TypeDescriptor obfDesc) {
+                return fieldsByObf.get(getFieldKey(obfName, obfDesc));
+        }
+
+        public FieldMapping getFieldByObf(FieldEntry field) {
+                return getFieldByObf(field.getName(), field.getDesc());
         }
 
-        public FieldMapping getFieldByDeobf(String deobfName, Type obfType) {
-                return fieldsByDeobf.get(getFieldKey(deobfName, obfType));
+        public FieldMapping getFieldByDeobf(String deobfName, TypeDescriptor obfDesc) {
+                return fieldsByDeobf.get(getFieldKey(deobfName, obfDesc));
         }
 
-        public String getObfFieldName(String deobfName, Type obfType) {
-                FieldMapping fieldMapping = fieldsByDeobf.get(getFieldKey(deobfName, obfType));
+        public String getObfFieldName(String deobfName, TypeDescriptor obfDesc) {
+                FieldMapping fieldMapping = fieldsByDeobf.get(getFieldKey(deobfName, obfDesc));
                 if (fieldMapping != null) {
                         return fieldMapping.getObfName();
                 }
                 return null;
         }
 
-        public String getDeobfFieldName(String obfName, Type obfType) {
-                FieldMapping fieldMapping = fieldsByObf.get(getFieldKey(obfName, obfType));
+        public String getDeobfFieldName(String obfName, TypeDescriptor obfDesc) {
+                FieldMapping fieldMapping = fieldsByObf.get(getFieldKey(obfName, obfDesc));
                 if (fieldMapping != null) {
                         return fieldMapping.getDeobfName();
                 }
                 return null;
         }
 
-        private String getFieldKey(String name, Type type) {
+        private String getFieldKey(String name, TypeDescriptor desc) {
                 if (name == null) {
                         throw new IllegalArgumentException("name cannot be null!");
                 }
-                if (type == null) {
-                        throw new IllegalArgumentException("type cannot be null!");
+                if (desc == null) {
+                        throw new IllegalArgumentException("desc cannot be null!");
                 }
-                return name + ":" + type;
+                return name + ":" + desc;
         }
 
-        public void setFieldName(String obfName, Type obfType, String deobfName) {
+        public void setFieldName(String obfName, TypeDescriptor obfDesc, String deobfName) {
                 assert (deobfName != null);
-                FieldMapping fieldMapping = fieldsByObf.get(getFieldKey(obfName, obfType));
+                FieldMapping fieldMapping = fieldsByObf.get(getFieldKey(obfName, obfDesc));
                 if (fieldMapping == null) {
-                        fieldMapping = new FieldMapping(obfName, obfType, deobfName, Mappings.EntryModifier.UNCHANGED);
-                        boolean obfWasAdded = fieldsByObf.put(getFieldKey(obfName, obfType), fieldMapping) == null;
+                        fieldMapping = new FieldMapping(obfName, obfDesc, deobfName, Mappings.EntryModifier.UNCHANGED);
+                        boolean obfWasAdded = fieldsByObf.put(getFieldKey(obfName, obfDesc), fieldMapping) == null;
                         assert (obfWasAdded);
                 } else {
-                        boolean wasRemoved = fieldsByDeobf.remove(getFieldKey(fieldMapping.getDeobfName(), obfType)) != null;
+                        boolean wasRemoved = fieldsByDeobf.remove(getFieldKey(fieldMapping.getDeobfName(), obfDesc)) != null;
                         assert (wasRemoved);
                 }
                 fieldMapping.setDeobfName(deobfName);
                 if (deobfName != null) {
-                        boolean wasAdded = fieldsByDeobf.put(getFieldKey(deobfName, obfType), fieldMapping) == null;
+                        boolean wasAdded = fieldsByDeobf.put(getFieldKey(deobfName, obfDesc), fieldMapping) == null;
                         assert (wasAdded);
                 }
                 this.isDirty = true;
@@ -282,13 +292,13 @@ public class ClassMapping implements Comparable<ClassMapping> {
 
         //// METHODS ////////
 
-        public void setFieldObfNameAndType(String oldObfName, Type obfType, String newObfName, Type newObfType) {
+        public void setFieldObfNameAndType(String oldObfName, TypeDescriptor obfDesc, String newObfName, TypeDescriptor newObfDesc) {
                 assert (newObfName != null);
-                FieldMapping fieldMapping = fieldsByObf.remove(getFieldKey(oldObfName, obfType));
+                FieldMapping fieldMapping = fieldsByObf.remove(getFieldKey(oldObfName, obfDesc));
                 assert (fieldMapping != null);
                 fieldMapping.setObfName(newObfName);
-                fieldMapping.setObfType(newObfType);
-                boolean obfWasAdded = fieldsByObf.put(getFieldKey(newObfName, newObfType), fieldMapping) == null;
+                fieldMapping.setObfDesc(newObfDesc);
+                boolean obfWasAdded = fieldsByObf.put(getFieldKey(newObfName, newObfDesc), fieldMapping) == null;
                 assert (obfWasAdded);
                 this.isDirty = true;
         }
@@ -298,23 +308,23 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 return methodsByObf.values();
         }
 
-        public boolean containsObfMethod(String obfName, Signature obfSignature) {
-                return methodsByObf.containsKey(getMethodKey(obfName, obfSignature));
+        public boolean containsObfMethod(String obfName, MethodDescriptor obfDescriptor) {
+                return methodsByObf.containsKey(getMethodKey(obfName, obfDescriptor));
         }
 
-        public boolean containsDeobfMethod(String deobfName, Signature obfSignature) {
-                return methodsByDeobf.containsKey(getMethodKey(deobfName, obfSignature));
+        public boolean containsDeobfMethod(String deobfName, MethodDescriptor obfDescriptor) {
+                return methodsByDeobf.containsKey(getMethodKey(deobfName, obfDescriptor));
         }
 
         public void addMethodMapping(MethodMapping methodMapping) {
-                String obfKey = getMethodKey(methodMapping.getObfName(), methodMapping.getObfSignature());
+                String obfKey = getMethodKey(methodMapping.getObfName(), methodMapping.getObfDesc());
                 if (methodsByObf.containsKey(obfKey)) {
                         throw new Error("Already have mapping for " + obfFullName + "." + obfKey);
                 }
                 boolean wasAdded = methodsByObf.put(obfKey, methodMapping) == null;
                 assert (wasAdded);
-                if (methodMapping.getDeobfName() != null) {
-                        String deobfKey = getMethodKey(methodMapping.getDeobfName(), methodMapping.getObfSignature());
+                if (!methodMapping.isObfuscated()) {
+                        String deobfKey = getMethodKey(methodMapping.getDeobfName(), methodMapping.getObfDesc());
                         if (methodsByDeobf.containsKey(deobfKey)) {
                                 throw new Error("Already have mapping for " + deobfName + "." + deobfKey);
                         }
@@ -326,44 +336,48 @@ public class ClassMapping implements Comparable<ClassMapping> {
         }
 
         public void removeMethodMapping(MethodMapping methodMapping) {
-                boolean obfWasRemoved = methodsByObf.remove(getMethodKey(methodMapping.getObfName(), methodMapping.getObfSignature())) != null;
+                boolean obfWasRemoved = methodsByObf.remove(getMethodKey(methodMapping.getObfName(), methodMapping.getObfDesc())) != null;
                 assert (obfWasRemoved);
-                if (methodMapping.getDeobfName() != null) {
-                        boolean deobfWasRemoved = methodsByDeobf.remove(getMethodKey(methodMapping.getDeobfName(), methodMapping.getObfSignature())) != null;
+                if (!methodMapping.isObfuscated()) {
+                        boolean deobfWasRemoved = methodsByDeobf.remove(getMethodKey(methodMapping.getDeobfName(), methodMapping.getObfDesc())) != null;
                         assert (deobfWasRemoved);
                 }
                 this.isDirty = true;
         }
 
-        public MethodMapping getMethodByObf(String obfName, Signature obfSignature) {
-                return methodsByObf.get(getMethodKey(obfName, obfSignature));
+        public MethodMapping getMethodByObf(String obfName, MethodDescriptor obfDescriptor) {
+                return methodsByObf.get(getMethodKey(obfName, obfDescriptor));
+        }
+
+        public MethodMapping getMethodByObf(MethodEntry method) {
+                return getMethodByObf(method.getName(), method.getDesc());
         }
 
-        public MethodMapping getMethodByDeobf(String deobfName, Signature obfSignature) {
-                return methodsByDeobf.get(getMethodKey(deobfName, obfSignature));
+        public MethodMapping getMethodByDeobf(String deobfName, MethodDescriptor obfDescriptor) {
+                return methodsByDeobf.get(getMethodKey(deobfName, obfDescriptor));
         }
 
-        private String getMethodKey(String name, Signature signature) {
+        private String getMethodKey(String name, MethodDescriptor descriptor) {
                 if (name == null) {
                         throw new IllegalArgumentException("name cannot be null!");
                 }
-                if (signature == null) {
-                        throw new IllegalArgumentException("signature cannot be null!");
+                if (descriptor == null) {
+                        throw new IllegalArgumentException("descriptor cannot be null!");
                 }
-                return name + signature;
+                return name + descriptor;
         }
 
-        public void setMethodName(String obfName, Signature obfSignature, String deobfName) {
-                MethodMapping methodMapping = methodsByObf.get(getMethodKey(obfName, obfSignature));
+        public void setMethodName(String obfName, MethodDescriptor obfDescriptor, String deobfName) {
+                MethodMapping methodMapping = methodsByObf.get(getMethodKey(obfName, obfDescriptor));
                 if (methodMapping == null) {
-                        methodMapping = createMethodMapping(obfName, obfSignature);
-                } else if (methodMapping.getDeobfName() != null) {
-                        boolean wasRemoved = methodsByDeobf.remove(getMethodKey(methodMapping.getDeobfName(), methodMapping.getObfSignature())) != null;
+                        methodMapping = createMethodMapping(obfName, obfDescriptor);
+                } else if (!methodMapping.isObfuscated()) {
+                        boolean wasRemoved = methodsByDeobf.remove(getMethodKey(methodMapping.getDeobfName(), methodMapping.getObfDesc())) != null;
                         assert (wasRemoved);
                 }
                 methodMapping.setDeobfName(deobfName);
                 if (deobfName != null) {
-                        boolean wasAdded = methodsByDeobf.put(getMethodKey(deobfName, obfSignature), methodMapping) == null;
+                        boolean wasAdded = methodsByDeobf.put(getMethodKey(deobfName, obfDescriptor), methodMapping) == null;
                         assert (wasAdded);
                 }
                 this.isDirty = true;
@@ -371,35 +385,35 @@ public class ClassMapping implements Comparable<ClassMapping> {
 
         //// ARGUMENTS ////////
 
-        public void setMethodObfNameAndSignature(String oldObfName, Signature obfSignature, String newObfName, Signature newObfSignature) {
+        public void setMethodObfNameAndSignature(String oldObfName, MethodDescriptor obfDescriptor, String newObfName, MethodDescriptor newObfDescriptor) {
                 assert (newObfName != null);
-                MethodMapping methodMapping = methodsByObf.remove(getMethodKey(oldObfName, obfSignature));
+                MethodMapping methodMapping = methodsByObf.remove(getMethodKey(oldObfName, obfDescriptor));
                 assert (methodMapping != null);
                 methodMapping.setObfName(newObfName);
-                methodMapping.setObfSignature(newObfSignature);
-                boolean obfWasAdded = methodsByObf.put(getMethodKey(newObfName, newObfSignature), methodMapping) == null;
+                methodMapping.setObfDescriptor(newObfDescriptor);
+                boolean obfWasAdded = methodsByObf.put(getMethodKey(newObfName, newObfDescriptor), methodMapping) == null;
                 assert (obfWasAdded);
                 this.isDirty = true;
         }
 
-        public void setArgumentName(String obfMethodName, Signature obfMethodSignature, int argumentIndex, String argumentName) {
+        public void setArgumentName(String obfMethodName, MethodDescriptor obfMethodDescriptor, int argumentIndex, String argumentName) {
                 assert (argumentName != null);
-                MethodMapping methodMapping = methodsByObf.get(getMethodKey(obfMethodName, obfMethodSignature));
+                MethodMapping methodMapping = methodsByObf.get(getMethodKey(obfMethodName, obfMethodDescriptor));
                 if (methodMapping == null) {
-                        methodMapping = createMethodMapping(obfMethodName, obfMethodSignature);
+                        methodMapping = createMethodMapping(obfMethodName, obfMethodDescriptor);
                 }
-                methodMapping.setArgumentName(argumentIndex, argumentName);
+                methodMapping.setLocalVariableName(argumentIndex, argumentName);
                 this.isDirty = true;
         }
 
-        public void removeArgumentName(String obfMethodName, Signature obfMethodSignature, int argumentIndex) {
-                methodsByObf.get(getMethodKey(obfMethodName, obfMethodSignature)).removeArgumentName(argumentIndex);
+        public void removeArgumentName(String obfMethodName, MethodDescriptor obfMethodDescriptor, int argumentIndex) {
+                methodsByObf.get(getMethodKey(obfMethodName, obfMethodDescriptor)).removeLocalVariableName(argumentIndex);
                 this.isDirty = true;
         }
 
-        private MethodMapping createMethodMapping(String obfName, Signature obfSignature) {
-                MethodMapping methodMapping = new MethodMapping(obfName, obfSignature);
-                boolean wasAdded = methodsByObf.put(getMethodKey(obfName, obfSignature), methodMapping) == null;
+        private MethodMapping createMethodMapping(String obfName, MethodDescriptor obfDescriptor) {
+                MethodMapping methodMapping = new MethodMapping(obfName, obfDescriptor);
+                boolean wasAdded = methodsByObf.put(getMethodKey(obfName, obfDescriptor), methodMapping) == null;
                 assert (wasAdded);
                 this.isDirty = true;
                 return methodMapping;
@@ -459,24 +473,24 @@ public class ClassMapping implements Comparable<ClassMapping> {
 
                 // rename field types
                 for (FieldMapping fieldMapping : new ArrayList<>(fieldsByObf.values())) {
-                        String oldFieldKey = getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfType());
+                        String oldFieldKey = getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfDesc());
                         if (fieldMapping.renameObfClass(oldObfClassName, newObfClassName)) {
                                 boolean wasRemoved = fieldsByObf.remove(oldFieldKey) != null;
                                 assert (wasRemoved);
                                 boolean wasAdded = fieldsByObf
-                                        .put(getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfType()), fieldMapping) == null;
+                                        .put(getFieldKey(fieldMapping.getObfName(), fieldMapping.getObfDesc()), fieldMapping) == null;
                                 assert (wasAdded);
                         }
                 }
 
                 // rename method signatures
                 for (MethodMapping methodMapping : new ArrayList<>(methodsByObf.values())) {
-                        String oldMethodKey = getMethodKey(methodMapping.getObfName(), methodMapping.getObfSignature());
+                        String oldMethodKey = getMethodKey(methodMapping.getObfName(), methodMapping.getObfDesc());
                         if (methodMapping.renameObfClass(oldObfClassName, newObfClassName)) {
                                 boolean wasRemoved = methodsByObf.remove(oldMethodKey) != null;
                                 assert (wasRemoved);
                                 boolean wasAdded = methodsByObf
-                                        .put(getMethodKey(methodMapping.getObfName(), methodMapping.getObfSignature()), methodMapping) == null;
+                                        .put(getMethodKey(methodMapping.getObfName(), methodMapping.getObfDesc()), methodMapping) == null;
                                 assert (wasAdded);
                         }
                 }
@@ -490,9 +504,9 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 return false;
         }
 
-        public boolean containsArgument(BehaviorEntry obfBehaviorEntry, String name) {
-                MethodMapping methodMapping = methodsByObf.get(getMethodKey(obfBehaviorEntry.getName(), obfBehaviorEntry.getSignature()));
-                return methodMapping != null && methodMapping.containsArgument(name);
+        public boolean containsArgument(MethodEntry obfMethodEntry, String name) {
+                MethodMapping methodMapping = methodsByObf.get(getMethodKey(obfMethodEntry.getName(), obfMethodEntry.getDesc()));
+                return methodMapping != null && methodMapping.containsLocalVariable(name);
         }
 
         public ClassEntry getObfEntry() {
@@ -503,6 +517,14 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 return deobfFullName != null ? new ClassEntry(deobfFullName) : null;
         }
 
+        public boolean isObfuscated() {
+                return this.deobfName == null || this.deobfName.equals(this.obfFullName);
+        }
+
+        public String getSaveName() {
+                return this.isObfuscated() ? this.obfFullName : this.deobfName;
+        }
+
         public boolean isDirty() {
                 return isDirty;
         }
@@ -511,6 +533,10 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 this.isDirty = false;
         }
 
+        public void markDirty() {
+                this.isDirty = true;
+        }
+
         public Mappings.EntryModifier getModifier() {
                 return modifier;
         }
@@ -521,9 +547,9 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 this.modifier = modifier;
         }
 
-        public void setFieldModifier(String obfName, Type obfType, Mappings.EntryModifier modifier) {
-                FieldMapping fieldMapping = fieldsByObf.computeIfAbsent(getFieldKey(obfName, obfType),
-                        k -> new FieldMapping(obfName, obfType, null, Mappings.EntryModifier.UNCHANGED));
+        public void setFieldModifier(String obfName, TypeDescriptor obfDesc, Mappings.EntryModifier modifier) {
+                FieldMapping fieldMapping = fieldsByObf.computeIfAbsent(getFieldKey(obfName, obfDesc),
+                        k -> new FieldMapping(obfName, obfDesc, null, Mappings.EntryModifier.UNCHANGED));
 
                 if (fieldMapping.getModifier() != modifier) {
                         fieldMapping.setModifier(modifier);
@@ -531,7 +557,7 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 }
         }
 
-        public void setMethodModifier(String obfName, Signature sig, Mappings.EntryModifier modifier) {
+        public void setMethodModifier(String obfName, MethodDescriptor sig, Mappings.EntryModifier modifier) {
                 MethodMapping methodMapping = methodsByObf.computeIfAbsent(getMethodKey(obfName, sig),
                         k -> new MethodMapping(obfName, sig, null, Mappings.EntryModifier.UNCHANGED));
 
@@ -546,4 +572,30 @@ public class ClassMapping implements Comparable<ClassMapping> {
                 this.deobfFullName = deobName;
                 return this;
         }
+
+        public ClassMapping copy() {
+                ClassMapping copied = new ClassMapping(this.obfFullName);
+                copied.obfSimpleName= this.obfSimpleName;
+                copied.modifier = this.modifier;
+                copied.deobfFullName = this.deobfFullName;
+                copied.deobfName = this.deobfName;
+                copied.innerClassesByDeobf = this.innerClassesByDeobf;
+                copied.innerClassesByObfFull = this.innerClassesByObfFull;
+                copied.innerClassesByObfSimple = this.innerClassesByObfSimple;
+                copied.fieldsByObf = this.fieldsByObf;
+                copied.fieldsByDeobf = this.fieldsByDeobf;
+                copied.methodsByObf = this.methodsByObf;
+                copied.methodsByDeobf = this.methodsByDeobf;
+                return copied;
+        }
+
+        @Override
+        public int hashCode() {
+                return this.obfFullName.hashCode();
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+                return obj instanceof ClassMapping && ((ClassMapping) obj).obfFullName.equals(this.obfFullName);
+        }
 }