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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.ConstantDynamic;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Opcodes;
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.
*
* @author Eugene Kuleshov
*/
public abstract class Remapper {
/**
* Returns the given descriptor, remapped with {@link #map(String)}.
*
* @param descriptor a type descriptor.
* @return the given descriptor, with its [array element type] internal name remapped with {@link
* #map(String)} (if the descriptor corresponds to an array or object type, otherwise the
* descriptor is returned as is).
*/
public String mapDesc(final String descriptor) {
return mapType(Type.getType(descriptor)).getDescriptor();
}
/**
* Returns the given {@link Type}, remapped with {@link #map(String)} or {@link
* #mapMethodDesc(String)}.
*
* @param type a type, which can be a method type.
* @return the given type, with its [array element type] internal name remapped with {@link
* #map(String)} (if the type is an array or object type, otherwise the type is returned as
* is) or, of the type is a method type, with its descriptor remapped with {@link
* #mapMethodDesc(String)}.
*/
private Type mapType(final Type type) {
switch (type.getSort()) {
case Type.ARRAY:
StringBuilder remappedDescriptor = new StringBuilder();
for (int i = 0; i < type.getDimensions(); ++i) {
remappedDescriptor.append('[');
}
remappedDescriptor.append(mapType(type.getElementType()).getDescriptor());
return Type.getType(remappedDescriptor.toString());
case Type.OBJECT:
String remappedInternalName = map(type.getInternalName());
return remappedInternalName != null ? Type.getObjectType(remappedInternalName) : type;
case Type.METHOD:
return Type.getMethodType(mapMethodDesc(type.getDescriptor()));
default:
return type;
}
}
/**
* Returns the given internal name, remapped with {@link #map(String)}.
*
* @param internalName the internal name (or array type descriptor) of some (array) class.
* @return the given internal name, remapped with {@link #map(String)}.
*/
public String mapType(final String internalName) {
if (internalName == null) {
return null;
}
return mapType(Type.getObjectType(internalName)).getInternalName();
}
/**
* Returns the given internal names, remapped with {@link #map(String)}.
*
* @param internalNames the internal names (or array type descriptors) of some (array) classes.
* @return the given internal name, remapped with {@link #map(String)}.
*/
public String[] mapTypes(final String[] internalNames) {
String[] remappedInternalNames = null;
for (int i = 0; i < internalNames.length; ++i) {
String internalName = internalNames[i];
String remappedInternalName = mapType(internalName);
if (remappedInternalName != null) {
if (remappedInternalNames == null) {
remappedInternalNames = new String[internalNames.length];
System.arraycopy(internalNames, 0, remappedInternalNames, 0, internalNames.length);
}
remappedInternalNames[i] = remappedInternalName;
}
}
return remappedInternalNames != null ? remappedInternalNames : internalNames;
}
/**
* Returns the given method descriptor, with its argument and return type descriptors remapped
* with {@link #mapDesc(String)}.
*
* @param methodDescriptor a method descriptor.
* @return the given method descriptor, with its argument and return type descriptors remapped
* with {@link #mapDesc(String)}.
*/
public String mapMethodDesc(final String methodDescriptor) {
if ("()V".equals(methodDescriptor)) {
return methodDescriptor;
}
StringBuilder stringBuilder = new StringBuilder("(");
for (Type argumentType : Type.getArgumentTypes(methodDescriptor)) {
stringBuilder.append(mapType(argumentType).getDescriptor());
}
Type returnType = Type.getReturnType(methodDescriptor);
if (returnType == Type.VOID_TYPE) {
stringBuilder.append(")V");
} else {
stringBuilder.append(')').append(mapType(returnType).getDescriptor());
}
return stringBuilder.toString();
}
/**
* Returns the given value, remapped with this remapper. Possible values are {@link Boolean},
* {@link Byte}, {@link Short}, {@link Character}, {@link Integer}, {@link Long}, {@link Double},
* {@link Float}, {@link String}, {@link Type}, {@link Handle}, {@link ConstantDynamic} or arrays
* of primitive types .
*
* @param value an object. Only {@link Type}, {@link Handle} and {@link ConstantDynamic} values
* are remapped.
* @return the given value, remapped with this remapper.
*/
public Object mapValue(final Object value) {
if (value instanceof Type) {
return mapType((Type) value);
}
if (value instanceof Handle) {
Handle handle = (Handle) value;
return new Handle(
handle.getTag(),
mapType(handle.getOwner()),
mapMethodName(handle.getOwner(), handle.getName(), handle.getDesc()),
handle.getTag() <= Opcodes.H_PUTSTATIC
? mapDesc(handle.getDesc())
: mapMethodDesc(handle.getDesc()),
handle.isInterface());
}
if (value instanceof ConstantDynamic) {
ConstantDynamic constantDynamic = (ConstantDynamic) value;
int bootstrapMethodArgumentCount = constantDynamic.getBootstrapMethodArgumentCount();
Object[] remappedBootstrapMethodArguments = new Object[bootstrapMethodArgumentCount];
for (int i = 0; i < bootstrapMethodArgumentCount; ++i) {
remappedBootstrapMethodArguments[i] =
mapValue(constantDynamic.getBootstrapMethodArgument(i));
}
String descriptor = constantDynamic.getDescriptor();
return new ConstantDynamic(
mapInvokeDynamicMethodName(constantDynamic.getName(), descriptor),
mapDesc(descriptor),
(Handle) mapValue(constantDynamic.getBootstrapMethod()),
remappedBootstrapMethodArguments);
}
return value;
}
/**
* Returns the given signature, remapped with the {@link SignatureVisitor} returned by {@link
* #createSignatureRemapper(SignatureVisitor)}.
*
* @param signature a JavaTypeSignature, ClassSignature or MethodSignature.
* @param typeSignature whether the given signature is a JavaTypeSignature.
* @return signature the given signature, remapped with the {@link SignatureVisitor} returned by
* {@link #createSignatureRemapper(SignatureVisitor)}.
*/
public String mapSignature(final String signature, final boolean typeSignature) {
if (signature == null) {
return null;
}
SignatureReader signatureReader = new SignatureReader(signature);
SignatureWriter signatureWriter = new SignatureWriter();
SignatureVisitor signatureRemapper = createSignatureRemapper(signatureWriter);
if (typeSignature) {
signatureReader.acceptType(signatureRemapper);
} else {
signatureReader.accept(signatureRemapper);
}
return signatureWriter.toString();
}
/**
* Constructs a new remapper for signatures. The default implementation of this method returns a
* new {@link SignatureRemapper}.
*
* @param signatureVisitor the SignatureVisitor the remapper must delegate to.
* @return the newly created remapper.
* @deprecated use {@link #createSignatureRemapper} instead.
*/
@Deprecated
protected SignatureVisitor createRemappingSignatureAdapter(
final SignatureVisitor signatureVisitor) {
return createSignatureRemapper(signatureVisitor);
}
/**
* Constructs a new remapper for signatures. The default implementation of this method returns a
* new {@link SignatureRemapper}.
*
* @param signatureVisitor the SignatureVisitor the remapper must delegate to.
* @return the newly created remapper.
*/
protected SignatureVisitor createSignatureRemapper(final SignatureVisitor signatureVisitor) {
return new SignatureRemapper(signatureVisitor, this);
}
/**
* Maps an inner class name to its new name. The default implementation of this method provides a
* strategy that will work for inner classes produced by Java, but not necessarily other
* languages. Subclasses can override.
*
* @param name the fully-qualified internal name of the inner class.
* @param ownerName the internal name of the owner class of the inner class.
* @param innerName the internal name of the inner class.
* @return the new inner name of the inner class.
*/
public String mapInnerClassName(
final String name, final String ownerName, final String innerName) {
final String remappedInnerName = this.mapType(name);
if (remappedInnerName.contains("$")) {
return remappedInnerName.substring(remappedInnerName.lastIndexOf('$') + 1);
} else {
return innerName;
}
}
/**
* Maps a method name to its new name. The default implementation of this method returns the given
* name, unchanged. Subclasses can override.
*
* @param owner the internal name of the owner class of the method.
* @param name the name of the method.
* @param descriptor the descriptor of the method.
* @return the new name of the method.
*/
public String mapMethodName(final String owner, final String name, final String descriptor) {
return name;
}
/**
* Maps an invokedynamic or a constant dynamic method name to its new name. The default
* implementation of this method returns the given name, unchanged. Subclasses can override.
*
* @param name the name of the method.
* @param descriptor the descriptor of the method.
* @return the new name of the method.
*/
public String mapInvokeDynamicMethodName(final String name, final String descriptor) {
return name;
}
/**
* Maps a field name to its new name. The default implementation of this method returns the given
* name, unchanged. Subclasses can override.
*
* @param owner the internal name of the owner class of the field.
* @param name the name of the field.
* @param descriptor the descriptor of the field.
* @return the new name of the field.
*/
public String mapFieldName(final String owner, final String name, final String descriptor) {
return name;
}
/**
* Maps a package name to its new name. The default implementation of this method returns the
* given name, unchanged. Subclasses can override.
*
* @param name the fully qualified name of the package (using dots).
* @return the new name of the package.
*/
public String mapPackageName(final String name) {
return name;
}
/**
* Maps a module name to its new name. The default implementation of this method returns the given
* name, unchanged. Subclasses can override.
*
* @param name the fully qualified name (using dots) of a module.
* @return the new name of the module.
*/
public String mapModuleName(final String name) {
return name;
}
/**
* Maps the internal name of a class to its new name. The default implementation of this method
* returns the given name, unchanged. Subclasses can override.
*
* @param internalName the internal name of a class.
* @return the new internal name.
*/
public String map(final String internalName) {
return internalName;
}
}
