/***
* 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 scouter.org.objectweb.asm.commons;
import scouter.org.objectweb.asm.Handle;
import scouter.org.objectweb.asm.Type;
import scouter.org.objectweb.asm.signature.SignatureReader;
import scouter.org.objectweb.asm.signature.SignatureVisitor;
import scouter.org.objectweb.asm.signature.SignatureWriter;
/**
* A class responsible for remapping types and names. Subclasses can override
* the following methods:
*
* <ul>
* <li>{@link #map(String)} - map type</li>
* <li>{@link #mapFieldName(String, String, String)} - map field name</li>
* <li>{@link #mapMethodName(String, String, String)} - map method name</li>
* </ul>
*
* @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()));
}
return value;
}
/**
*
* @param typeSignature
* true if signature is a FieldTypeSignature, such as the
* signature parameter of the ClassVisitor.visitField or
* MethodVisitor.visitLocalVariable methods
*/
public String mapSignature(String signature, boolean typeSignature) {
if (signature == null) {
return null;
}
SignatureReader r = new SignatureReader(signature);
SignatureWriter w = new SignatureWriter();
SignatureVisitor a = createRemappingSignatureAdapter(w);
if (typeSignature) {
r.acceptType(a);
} else {
r.accept(a);
}
return w.toString();
}
protected SignatureVisitor createRemappingSignatureAdapter(
SignatureVisitor v) {
return new RemappingSignatureAdapter(v, this);
}
/**
* 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 type name to the new name. Subclasses can override.
*/
public String map(String typeName) {
return typeName;
}
}