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jeremybenn |
/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000-2005 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.objectweb.asm.tree;
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import java.util.ArrayList;
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import java.util.List;
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import org.objectweb.asm.AnnotationVisitor;
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/**
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* A node that represents an annotationn.
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*
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* @author Eric Bruneton
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*/
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public class AnnotationNode implements AnnotationVisitor {
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/**
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* The class descriptor of the annotation class.
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*/
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public String desc;
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/**
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* The name value pairs of this annotation. Each name value pair is stored
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* as two consecutive elements in the list. The name is a {@link String},
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* and the value may be a {@link Byte}, {@link Boolean}, {@link Character},
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* {@link Short}, {@link Integer}, {@link Long}, {@link Float},
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* {@link Double}, {@link String} or {@link org.objectweb.asm.Type}, or an
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* two elements String array (for enumeration values), a
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* {@link AnnotationNode}, or a {@link List} of values of one of the
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* preceding types. The list may be <tt>null</tt> if there is no name
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* value pair.
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*/
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public List values;
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/**
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* Constructs a new {@link AnnotationNode}.
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*
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* @param desc the class descriptor of the annotation class.
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*/
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public AnnotationNode(final String desc) {
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this.desc = desc;
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}
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/**
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* Constructs a new {@link AnnotationNode} to visit an array value.
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*
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* @param values where the visited values must be stored.
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*/
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AnnotationNode(final List values) {
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this.values = values;
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}
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// ------------------------------------------------------------------------
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// Implementation of the AnnotationVisitor interface
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// ------------------------------------------------------------------------
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public void visit(final String name, final Object value) {
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if (values == null) {
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values = new ArrayList(this.desc != null ? 2 : 1);
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}
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if (this.desc != null) {
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values.add(name);
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}
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values.add(value);
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}
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public void visitEnum(
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final String name,
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final String desc,
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final String value)
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{
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if (values == null) {
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values = new ArrayList(this.desc != null ? 2 : 1);
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}
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if (this.desc != null) {
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values.add(name);
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}
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values.add(new String[] { desc, value });
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}
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public AnnotationVisitor visitAnnotation(
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final String name,
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final String desc)
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{
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if (values == null) {
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values = new ArrayList(this.desc != null ? 2 : 1);
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}
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if (this.desc != null) {
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values.add(name);
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}
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AnnotationNode annotation = new AnnotationNode(desc);
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values.add(annotation);
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return annotation;
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}
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public AnnotationVisitor visitArray(final String name) {
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if (values == null) {
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values = new ArrayList(this.desc != null ? 2 : 1);
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}
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if (this.desc != null) {
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values.add(name);
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}
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List array = new ArrayList();
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values.add(array);
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return new AnnotationNode(array);
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}
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public void visitEnd() {
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}
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// ------------------------------------------------------------------------
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// Accept methods
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// ------------------------------------------------------------------------
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/**
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* Makes the given visitor visit this annotation.
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*
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* @param av an annotation visitor.
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*/
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public void accept(final AnnotationVisitor av) {
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if (values != null) {
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for (int i = 0; i < values.size(); i += 2) {
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String name = (String) values.get(i);
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Object value = values.get(i + 1);
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accept(av, name, value);
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}
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}
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av.visitEnd();
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}
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/**
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* Makes the given visitor visit a given annotation value.
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*
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* @param av an annotation visitor.
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* @param name the value name.
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* @param value the actual value.
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*/
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static void accept(
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final AnnotationVisitor av,
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final String name,
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final Object value)
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{
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if (value instanceof String[]) {
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String[] typeconst = (String[]) value;
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av.visitEnum(name, typeconst[0], typeconst[1]);
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} else if (value instanceof AnnotationNode) {
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AnnotationNode an = (AnnotationNode) value;
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an.accept(av.visitAnnotation(name, an.desc));
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} else if (value instanceof List) {
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AnnotationVisitor v = av.visitArray(name);
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List array = (List) value;
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for (int j = 0; j < array.size(); ++j) {
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accept(v, null, array.get(j));
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}
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v.visitEnd();
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} else {
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av.visit(name, value);
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}
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}
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}
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