    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 *  Unless required by applicable law or agreed to in writing, software
    012 *  distributed under the License is distributed on an "AS IS" BASIS,
    013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 *  See the License for the specific language governing permissions and
    015 *  limitations under the License.
    016 */
    017
    018package org.apache.bcel.classfile;
    019
    020import java.io.DataInput;
    021import java.io.DataOutputStream;
    022import java.io.IOException;
    023
    024import org.apache.bcel.Const;
    025
    026/**
    027 * Represents the default value of a annotation for a method info.
    028 *
    029 * @since 6.0
    030 */
    031public class AnnotationDefault extends Attribute {
    032
    033    private ElementValue defaultValue;
    034
    035    /**
    036     * @param nameIndex Index pointing to the name <em>Code</em>
    037     * @param length Content length in bytes
    038     * @param input Input stream
    039     * @param constantPool Array of constants
    040     */
    041    AnnotationDefault(final int nameIndex, final int length, final DataInput input, final ConstantPool constantPool) throws IOException {
    042        this(nameIndex, length, (ElementValue) null, constantPool);
    043        defaultValue = ElementValue.readElementValue(input, constantPool);
    044    }
    045
    046    /**
    047     * @param nameIndex Index pointing to the name <em>Code</em>
    048     * @param length Content length in bytes
    049     * @param defaultValue the annotation's default value
    050     * @param constantPool Array of constants
    051     */
    052    public AnnotationDefault(final int nameIndex, final int length, final ElementValue defaultValue, final ConstantPool constantPool) {
    053        super(Const.ATTR_ANNOTATION_DEFAULT, nameIndex, length, constantPool);
    054        this.defaultValue = defaultValue;
    055    }
    056
    057    /**
    058     * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
    059     * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
    060     *
    061     * @param v Visitor object
    062     */
    063    @Override
    064    public void accept(final Visitor v) {
    065        v.visitAnnotationDefault(this);
    066    }
    067
    068    @Override
    069    public Attribute copy(final ConstantPool constantPool) {
    070        return (Attribute) clone();
    071    }
    072
    073    @Override
    074    public final void dump(final DataOutputStream dos) throws IOException {
    075        super.dump(dos);
    076        defaultValue.dump(dos);
    077    }
    078
    079    /**
    080     * @return the default value
    081     */
    082    public final ElementValue getDefaultValue() {
    083        return defaultValue;
    084    }
    085
    086    /**
    087     * @param defaultValue the default value of this methodinfo's annotation
    088     */
    089    public final void setDefaultValue(final ElementValue defaultValue) {
    090        this.defaultValue = defaultValue;
    091    }
    092}