// 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 net.bytebuddy.jar.asm;
/**
* A visitor to visit a Java field. The methods of this class must be called in the following order:
* ( <tt>visitAnnotation</tt> | <tt>visitTypeAnnotation</tt> | <tt>visitAttribute</tt> )*
* <tt>visitEnd</tt>.
*
* @author Eric Bruneton
*/
public abstract class
FieldVisitor {
/**
* 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_EXPERIMENTAL}.
*/
protected final int
api;
/** The field visitor to which this visitor must delegate method calls. May be null. */
protected
FieldVisitor fv;
/**
* 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_EXPERIMENTAL}.
*/
public
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 {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link
* Opcodes#ASM7_EXPERIMENTAL}.
* @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_EXPERIMENTAL) {
throw new
IllegalArgumentException();
}
this.
api =
api;
this.
fv =
fieldVisitor;
}
/**
* Visits an annotation of the field.
*
* @param descriptor the class descriptor of the annotation class.
* @param visible <tt>true</tt> if the annotation is visible at runtime.
* @return a visitor to visit the annotation values, or <tt>null</tt> 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 <tt>null</tt> if the annotation targets
* 'typeRef' as a whole.
* @param descriptor the class descriptor of the annotation class.
* @param visible <tt>true</tt> if the annotation is visible at runtime.
* @return a visitor to visit the annotation values, or <tt>null</tt> 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();
}
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();
}
}
}