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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.AnnotationVisitor;
import org.objectweb.asm.Opcodes;
/**
* An {@link AnnotationVisitor} that remaps types with a {@link Remapper}.
*
* @author Eugene Kuleshov
*/
public class AnnotationRemapper extends AnnotationVisitor {
/**
* The descriptor of the visited annotation. May be {@literal null}, for instance for
* AnnotationDefault.
*/
protected final String descriptor;
/** The remapper used to remap the types in the visited annotation. */
protected final Remapper remapper;
/**
* Constructs a new {@link AnnotationRemapper}. Subclasses must not use this constructor.
* Instead, they must use the {@link #AnnotationRemapper(int,AnnotationVisitor,Remapper)} version.
*
* @param annotationVisitor the annotation visitor this remapper must delegate to.
* @param remapper the remapper to use to remap the types in the visited annotation.
* @deprecated use {@link #AnnotationRemapper(String, AnnotationVisitor, Remapper)} instead.
*/
@Deprecated
public AnnotationRemapper(final AnnotationVisitor annotationVisitor, final Remapper remapper) {
this(/* descriptor = */ null, annotationVisitor, remapper);
}
/**
* Constructs a new {@link AnnotationRemapper}. Subclasses must not use this constructor.
* Instead, they must use the {@link #AnnotationRemapper(int,String,AnnotationVisitor,Remapper)}
* version.
*
* @param descriptor the descriptor of the visited annotation. May be {@literal null}.
* @param annotationVisitor the annotation visitor this remapper must delegate to.
* @param remapper the remapper to use to remap the types in the visited annotation.
*/
public AnnotationRemapper(
final String descriptor, final AnnotationVisitor annotationVisitor, final Remapper remapper) {
this(/* latest api = */ Opcodes.ASM9, descriptor, annotationVisitor, remapper);
}
/**
* Constructs a new {@link AnnotationRemapper}.
*
* @param api the ASM API version supported by this remapper. Must be one of the {@code
* ASM}x values in {@link Opcodes}.
* @param annotationVisitor the annotation visitor this remapper must delegate to.
* @param remapper the remapper to use to remap the types in the visited annotation.
* @deprecated use {@link #AnnotationRemapper(int, String, AnnotationVisitor, Remapper)} instead.
*/
@Deprecated
protected AnnotationRemapper(
final int api, final AnnotationVisitor annotationVisitor, final Remapper remapper) {
this(api, /* descriptor = */ null, annotationVisitor, remapper);
}
/**
* Constructs a new {@link AnnotationRemapper}.
*
* @param api the ASM API version supported by this remapper. Must be one of the {@code
* ASM}x values in {@link Opcodes}.
* @param descriptor the descriptor of the visited annotation. May be {@literal null}.
* @param annotationVisitor the annotation visitor this remapper must delegate to.
* @param remapper the remapper to use to remap the types in the visited annotation.
*/
protected AnnotationRemapper(
final int api,
final String descriptor,
final AnnotationVisitor annotationVisitor,
final Remapper remapper) {
super(api, annotationVisitor);
this.descriptor = descriptor;
this.remapper = remapper;
}
@Override
public void visit(final String name, final Object value) {
super.visit(mapAnnotationAttributeName(name), remapper.mapValue(value));
}
@Override
public void visitEnum(final String name, final String descriptor, final String value) {
super.visitEnum(mapAnnotationAttributeName(name), remapper.mapDesc(descriptor), value);
}
@Override
public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
AnnotationVisitor annotationVisitor =
super.visitAnnotation(mapAnnotationAttributeName(name), remapper.mapDesc(descriptor));
if (annotationVisitor == null) {
return null;
} else {
return annotationVisitor == av
? this
: createAnnotationRemapper(descriptor, annotationVisitor);
}
}
@Override
public AnnotationVisitor visitArray(final String name) {
AnnotationVisitor annotationVisitor = super.visitArray(mapAnnotationAttributeName(name));
if (annotationVisitor == null) {
return null;
} else {
return annotationVisitor == av
? this
: createAnnotationRemapper(/* descriptor = */ null, annotationVisitor);
}
}
/**
* Constructs a new remapper for annotations. The default implementation of this method returns a
* new {@link AnnotationRemapper}.
*
* @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
* @return the newly created remapper.
* @deprecated use {@link #createAnnotationRemapper(String, AnnotationVisitor)} instead.
*/
@Deprecated
protected AnnotationVisitor createAnnotationRemapper(final AnnotationVisitor annotationVisitor) {
return new AnnotationRemapper(api, /* descriptor = */ null, annotationVisitor, remapper);
}
/**
* Constructs a new remapper for annotations. The default implementation of this method returns a
* new {@link AnnotationRemapper}.
*
* @param descriptor the descriptor of the visited annotation.
* @param annotationVisitor the AnnotationVisitor the remapper must delegate to.
* @return the newly created remapper.
*/
protected AnnotationVisitor createAnnotationRemapper(
final String descriptor, final AnnotationVisitor annotationVisitor) {
return new AnnotationRemapper(api, descriptor, annotationVisitor, remapper)
.orDeprecatedValue(createAnnotationRemapper(annotationVisitor));
}
/**
* Returns either this object, or the given one. If the given object is equal to the object
* returned by the default implementation of the deprecated createAnnotationRemapper method,
* meaning that this method has not been overridden (or only in minor ways, for instance to add
* logging), then we can return this object instead, supposed to have been created by the new
* createAnnotationRemapper method. Otherwise we must return the given object.
*
* @param deprecatedAnnotationVisitor the result of a call to the deprecated
* createAnnotationRemapper method.
* @return either this object, or the given one.
*/
final AnnotationVisitor orDeprecatedValue(final AnnotationVisitor deprecatedAnnotationVisitor) {
if (deprecatedAnnotationVisitor.getClass() == getClass()) {
AnnotationRemapper deprecatedAnnotationRemapper =
(AnnotationRemapper) deprecatedAnnotationVisitor;
if (deprecatedAnnotationRemapper.api == api
&& deprecatedAnnotationRemapper.av == av
&& deprecatedAnnotationRemapper.remapper == remapper) {
return this;
}
}
return deprecatedAnnotationVisitor;
}
/**
* Maps an annotation attribute name with the remapper. Returns the original name unchanged if the
* descriptor of the annotation is {@literal null}.
*
* @param name the name of the annotation attribute.
* @return the new name of the annotation attribute.
*/
private String mapAnnotationAttributeName(final String name) {
if (descriptor == null) {
return name;
}
return remapper.mapAnnotationAttributeName(descriptor, name);
}
}
