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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm.commons;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Type;
import org.objectweb.asm.signature.SignatureReader;
import org.objectweb.asm.signature.SignatureVisitor;
import org.objectweb.asm.signature.SignatureWriter;
/**
* A class responsible for remapping types and names. Subclasses can override the following methods:
*
*
*
{@link #map(String)} - map type
*
{@link #mapFieldName(String, String, String)} - map field name
*
{@link #mapMethodName(String, String, String)} - map method name
*
*
* @author Eugene Kuleshov
*/
public abstract class Remapper {
public String mapDesc(String desc) {
Type t = Type.getType(desc);
switch (t.getSort()) {
case Type.ARRAY:
String s = mapDesc(t.getElementType().getDescriptor());
for (int i = 0; i < t.getDimensions(); ++i) {
s = '[' + s;
}
return s;
case Type.OBJECT:
String newType = map(t.getInternalName());
if (newType != null) {
return 'L' + newType + ';';
}
}
return desc;
}
private Type mapType(Type t) {
switch (t.getSort()) {
case Type.ARRAY:
String s = mapDesc(t.getElementType().getDescriptor());
for (int i = 0; i < t.getDimensions(); ++i) {
s = '[' + s;
}
return Type.getType(s);
case Type.OBJECT:
s = map(t.getInternalName());
return s != null ? Type.getObjectType(s) : t;
case Type.METHOD:
return Type.getMethodType(mapMethodDesc(t.getDescriptor()));
}
return t;
}
public String mapType(String type) {
if (type == null) {
return null;
}
return mapType(Type.getObjectType(type)).getInternalName();
}
public String[] mapTypes(String[] types) {
String[] newTypes = null;
boolean needMapping = false;
for (int i = 0; i < types.length; i++) {
String type = types[i];
String newType = map(type);
if (newType != null && newTypes == null) {
newTypes = new String[types.length];
if (i > 0) {
System.arraycopy(types, 0, newTypes, 0, i);
}
needMapping = true;
}
if (needMapping) {
newTypes[i] = newType == null ? type : newType;
}
}
return needMapping ? newTypes : types;
}
public String mapMethodDesc(String desc) {
if ("()V".equals(desc)) {
return desc;
}
Type[] args = Type.getArgumentTypes(desc);
StringBuilder sb = new StringBuilder("(");
for (int i = 0; i < args.length; i++) {
sb.append(mapDesc(args[i].getDescriptor()));
}
Type returnType = Type.getReturnType(desc);
if (returnType == Type.VOID_TYPE) {
sb.append(")V");
return sb.toString();
}
sb.append(')').append(mapDesc(returnType.getDescriptor()));
return sb.toString();
}
public Object mapValue(Object value) {
if (value instanceof Type) {
return mapType((Type) value);
}
if (value instanceof Handle) {
Handle h = (Handle) value;
return new Handle(
h.getTag(),
mapType(h.getOwner()),
mapMethodName(h.getOwner(), h.getName(), h.getDesc()),
mapMethodDesc(h.getDesc()),
h.isInterface());
}
return value;
}
/**
* @param signature signature for mapper
* @param typeSignature true if signature is a FieldTypeSignature, such as the signature parameter
* of the ClassVisitor.visitField or MethodVisitor.visitLocalVariable methods
* @return signature rewritten as a string
*/
public String mapSignature(String signature, boolean typeSignature) {
if (signature == null) {
return null;
}
SignatureReader r = new SignatureReader(signature);
SignatureWriter w = new SignatureWriter();
SignatureVisitor a = createSignatureRemapper(w);
if (typeSignature) {
r.acceptType(a);
} else {
r.accept(a);
}
return w.toString();
}
/**
* Constructs a new remapper for signatures.
*
* @param v the SignatureVisitor the remapper must delegate to.
* @return the newly created remapper.
* @deprecated use {@link #createSignatureRemapper} instead.
*/
@Deprecated
protected SignatureVisitor createRemappingSignatureAdapter(SignatureVisitor v) {
return new SignatureRemapper(v, this);
}
/**
* Constructs a new remapper for signatures.
*
* @param v the SignatureVisitor the remapper must delegate to.
* @return the newly created remapper.
*/
protected SignatureVisitor createSignatureRemapper(SignatureVisitor v) {
return createRemappingSignatureAdapter(v);
}
/**
* Map method name to the new name. Subclasses can override.
*
* @param owner owner of the method.
* @param name name of the method.
* @param desc descriptor of the method.
* @return new name of the method
*/
public String mapMethodName(String owner, String name, String desc) {
return name;
}
/**
* Map invokedynamic method name to the new name. Subclasses can override.
*
* @param name name of the invokedynamic.
* @param desc descriptor of the invokedynamic.
* @return new invokdynamic name.
*/
public String mapInvokeDynamicMethodName(String name, String desc) {
return name;
}
/**
* Map field name to the new name. Subclasses can override.
*
* @param owner owner of the field.
* @param name name of the field
* @param desc descriptor of the field
* @return new name of the field.
*/
public String mapFieldName(String owner, String name, String desc) {
return name;
}
/**
* Map package name to the new name. Subclasses can override.
*
* @param name name of the package
* @return new name of the package
*/
public String mapPackageName(String name) {
String fakeName = map(name + ".FakeClassName");
int index;
return fakeName == null || (index = fakeName.lastIndexOf('.')) == -1
? name
: fakeName.substring(0, index);
}
/**
* Map module name to the new name. Subclasses can override.
*
* @param name name of the module
* @return new name of the module
*/
public String mapModuleName(String name) {
return name;
}
/**
* Map type name to the new name. Subclasses can override.
*
* @param typeName the type name
* @return new name, default implementation is the identity.
*/
public String map(String typeName) {
return typeName;
}
}
