ASM: a very small and fast Java bytecode manipulation framework
Copyright (c) 2000-2007 INRIA, France Telecom
All rights reserved.
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modification, are permitted provided that the following conditions
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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.
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2007 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.glassfish.pfl.objectweb.asm.tree;

import java.util.ArrayList;
import java.util.List;

import org.glassfish.pfl.objectweb.asm.AnnotationVisitor;

A node that represents an annotationn.
Author:
Eric Bruneton/**
 * A node that represents an annotationn.
 * 
 * @author Eric Bruneton
 */
public class AnnotationNode implements AnnotationVisitor {

    
The class descriptor of the annotation class.
/**
     * The class descriptor of the annotation class.
     */
    public String desc;

    
The name value pairs of this annotation. Each name value pair is stored as two consecutive elements in the list. The name is a String, and the value may be a Byte, Boolean, Character, Short, Integer, Long, Float, Double, String or Type, or an two elements String array (for enumeration values), a AnnotationNode, or a List of values of one of the preceding types. The list may be null if there is no name
value pair.
/**
     * The name value pairs of this annotation. Each name value pair is stored
     * as two consecutive elements in the list. The name is a {@link String},
     * and the value may be a {@link Byte}, {@link Boolean}, {@link Character},
     * {@link Short}, {@link Integer}, {@link Long}, {@link Float},
     * {@link Double}, {@link String} or {@link org.objectweb.asm.Type}, or an
     * two elements String array (for enumeration values), a
     * {@link AnnotationNode}, or a {@link List} of values of one of the
     * preceding types. The list may be <tt>null</tt> if there is no name
     * value pair.
     */
    public List values;

    
Constructs a new AnnotationNode. 
Params:
desc – the class descriptor of the annotation class./**
     * Constructs a new {@link AnnotationNode}.
     * 
     * @param desc the class descriptor of the annotation class.
     */
    public AnnotationNode(final String desc) {
        this.desc = desc;
    }

    
Constructs a new AnnotationNode to visit an array value. 
Params:
values – where the visited values must be stored./**
     * Constructs a new {@link AnnotationNode} to visit an array value.
     * 
     * @param values where the visited values must be stored.
     */
    AnnotationNode(final List values) {
        this.values = values;
    }

    // ------------------------------------------------------------------------
    // Implementation of the AnnotationVisitor interface
    // ------------------------------------------------------------------------

    public void visit(final String name, final Object value) {
        if (values == null) {
            values = new ArrayList(this.desc != null ? 2 : 1);
        }
        if (this.desc != null) {
            values.add(name);
        }
        values.add(value);
    }

    public void visitEnum(
        final String name,
        final String desc,
        final String value)
    {
        if (values == null) {
            values = new ArrayList(this.desc != null ? 2 : 1);
        }
        if (this.desc != null) {
            values.add(name);
        }
        values.add(new String[] { desc, value });
    }

    public AnnotationVisitor visitAnnotation(
        final String name,
        final String desc)
    {
        if (values == null) {
            values = new ArrayList(this.desc != null ? 2 : 1);
        }
        if (this.desc != null) {
            values.add(name);
        }
        AnnotationNode annotation = new AnnotationNode(desc);
        values.add(annotation);
        return annotation;
    }

    public AnnotationVisitor visitArray(final String name) {
        if (values == null) {
            values = new ArrayList(this.desc != null ? 2 : 1);
        }
        if (this.desc != null) {
            values.add(name);
        }
        List array = new ArrayList();
        values.add(array);
        return new AnnotationNode(array);
    }

    public void visitEnd() {
    }

    // ------------------------------------------------------------------------
    // Accept methods
    // ------------------------------------------------------------------------

    
Makes the given visitor visit this annotation.
Params:
av – an annotation visitor. Maybe null./**
     * Makes the given visitor visit this annotation.
     * 
     * @param av an annotation visitor. Maybe <tt>null</tt>.
     */
    public void accept(final AnnotationVisitor av) {
        if (av != null) {
            if (values != null) {
                for (int i = 0; i < values.size(); i += 2) {
                    String name = (String) values.get(i);
                    Object value = values.get(i + 1);
                    accept(av, name, value);
                }
            }
            av.visitEnd();
        }
    }

    
Makes the given visitor visit a given annotation value.
Params:
av – an annotation visitor. Maybe null.
name – the value name.
value – the actual value./**
     * Makes the given visitor visit a given annotation value.
     * 
     * @param av an annotation visitor. Maybe <tt>null</tt>.
     * @param name the value name.
     * @param value the actual value.
     */
    static void accept(
        final AnnotationVisitor av,
        final String name,
        final Object value)
    {
        if (av != null) {
            if (value instanceof String[]) {
                String[] typeconst = (String[]) value;
                av.visitEnum(name, typeconst[0], typeconst[1]);
            } else if (value instanceof AnnotationNode) {
                AnnotationNode an = (AnnotationNode) value;
                an.accept(av.visitAnnotation(name, an.desc));
            } else if (value instanceof List) {
                AnnotationVisitor v = av.visitArray(name);
                List array = (List) value;
                for (int j = 0; j < array.size(); ++j) {
                    accept(v, null, array.get(j));
                }
                v.visitEnd();
            } else {
                av.visit(name, value);
            }
        }
    }
}