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/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* 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:
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* 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
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* 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 jdk.internal.org.objectweb.asm;
A visitor to visit a Java field. The methods of this class must be called in the following order: ( visitAnnotation | visitTypeAnnotation | visitAttribute )*
visitEnd. Author: Eric Bruneton
/**
* 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 Opcodes.ASM4, Opcodes.ASM5, Opcodes.ASM6 or Opcodes.ASM7. /**
* The ASM API version implemented by this visitor. The value of this field must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
*/
protected final int api;
The field visitor to which this visitor must delegate method calls. May be null. /** The field visitor to which this visitor must delegate method calls. May be null. */
protected FieldVisitor fv;
Constructs a new FieldVisitor. Params: - api – the ASM API version implemented by this visitor. Must be one of
Opcodes.ASM4, Opcodes.ASM5, Opcodes.ASM6 or Opcodes.ASM7.
/**
* Constructs a new {@link FieldVisitor}.
*
* @param api the ASM API version implemented by this visitor. Must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
*/
public FieldVisitor(final int api) {
this(api, null);
}
Constructs a new FieldVisitor. Params: - api – the ASM API version implemented by this visitor. Must be one of
Opcodes.ASM4, Opcodes.ASM5, Opcodes.ASM6 or Opcodes.ASM7. - fieldVisitor – the field visitor to which this visitor must delegate method calls. May be
null.
/**
* Constructs a new {@link FieldVisitor}.
*
* @param api the ASM API version implemented by this visitor. Must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
* @param fieldVisitor the field visitor to which this visitor must delegate method calls. May be
* null.
*/
public FieldVisitor(final int api, final FieldVisitor fieldVisitor) {
if (api != Opcodes.ASM6 && api != Opcodes.ASM5 && api != Opcodes.ASM4 && api != Opcodes.ASM7) {
throw new IllegalArgumentException();
}
this.api = api;
this.fv = fieldVisitor;
}
Visits an annotation of the field.
Params: - descriptor – the class descriptor of the annotation class.
- visible – true if the annotation is visible at runtime.
Returns: a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.
/**
* 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.
Params: - typeRef – a reference to the annotated type. The sort of this type reference must be
TypeReference.FIELD. See TypeReference. - typePath – the path to the annotated type argument, wildcard bound, array element type, or static inner type within 'typeRef'. May be null if the annotation targets 'typeRef' as a whole.
- descriptor – the class descriptor of the annotation class.
- visible – true if the annotation is visible at runtime.
Returns: a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.
/**
* 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.
Params: - attribute – an attribute.
/**
* 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.
/**
* 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();
}
}
}