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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
// 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 aj.org.objectweb.asm;
/**
* A visitor to visit a Java field. The methods of this class must be called in the following order:
* ( {@code visitAnnotation} | {@code visitTypeAnnotation} | {@code visitAttribute} )* {@code
* visitEnd}.
*
* @author Eric Bruneton
*/
public abstract class FieldVisitor {
/**
* The ASM API version implemented by this visitor. The value of this field must be one of the
* {@code ASM}x values in {@link Opcodes}.
*/
protected final int api;
/** The field visitor to which this visitor must delegate method calls. May be {@literal null}. */
protected FieldVisitor fv;
/**
* Constructs a new {@link FieldVisitor}.
*
* @param api the ASM API version implemented by this visitor. Must be one of the {@code
* ASM}x values in {@link Opcodes}.
*/
protected FieldVisitor(final int api) {
this(api, null);
}
/**
* Constructs a new {@link FieldVisitor}.
*
* @param api the ASM API version implemented by this visitor. Must be one of the {@code
* ASM}x values in {@link Opcodes}.
* @param fieldVisitor the field visitor to which this visitor must delegate method calls. May be
* null.
*/
protected FieldVisitor(final int api, final FieldVisitor fieldVisitor) {
if (api != Opcodes.ASM9
&& api != Opcodes.ASM8
&& api != Opcodes.ASM7
&& api != Opcodes.ASM6
&& api != Opcodes.ASM5
&& api != Opcodes.ASM4
&& api != Opcodes.ASM10_EXPERIMENTAL) {
throw new IllegalArgumentException("Unsupported api " + api);
}
if (api == Opcodes.ASM10_EXPERIMENTAL) {
Constants.checkAsmExperimental(this);
}
this.api = api;
this.fv = fieldVisitor;
}
/**
* The field visitor to which this visitor must delegate method calls. May be {@literal null}.
*
* @return the field visitor to which this visitor must delegate method calls, or {@literal null}.
*/
public FieldVisitor getDelegate() {
return fv;
}
/**
* Visits an annotation of the field.
*
* @param descriptor the class descriptor of the annotation class.
* @param visible {@literal true} if the annotation is visible at runtime.
* @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
* interested in visiting this annotation.
*/
public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
if (fv != null) {
return fv.visitAnnotation(descriptor, visible);
}
return null;
}
/**
* Visits an annotation on the type of the field.
*
* @param typeRef a reference to the annotated type. The sort of this type reference must be
* {@link TypeReference#FIELD}. See {@link TypeReference}.
* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
* static inner type within 'typeRef'. May be {@literal null} if the annotation targets
* 'typeRef' as a whole.
* @param descriptor the class descriptor of the annotation class.
* @param visible {@literal true} if the annotation is visible at runtime.
* @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
* interested in visiting this annotation.
*/
public AnnotationVisitor visitTypeAnnotation(
final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
if (api < Opcodes.ASM5) {
throw new UnsupportedOperationException("This feature requires ASM5");
}
if (fv != null) {
return fv.visitTypeAnnotation(typeRef, typePath, descriptor, visible);
}
return null;
}
/**
* Visits a non standard attribute of the field.
*
* @param attribute an attribute.
*/
public void visitAttribute(final Attribute attribute) {
if (fv != null) {
fv.visitAttribute(attribute);
}
}
/**
* Visits the end of the field. This method, which is the last one to be called, is used to inform
* the visitor that all the annotations and attributes of the field have been visited.
*/
public void visitEnd() {
if (fv != null) {
fv.visitEnd();
}
}
}