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.DataOutputStream;
021import java.io.IOException;
022
023import org.apache.bcel.Const;
024
025/**
026 * an annotation's element value pair
027 *
028 * @since 6.0
029 */
030public class ElementValuePair
031{
032    private final ElementValue elementValue;
033
034    private final ConstantPool constantPool;
035
036    private final int elementNameIndex;
037
038    public ElementValuePair(final int elementNameIndex, final ElementValue elementValue,
039            final ConstantPool constantPool)
040    {
041        this.elementValue = elementValue;
042        this.elementNameIndex = elementNameIndex;
043        this.constantPool = constantPool;
044    }
045
046    public String getNameString()
047    {
048        final ConstantUtf8 c = (ConstantUtf8) constantPool.getConstant(
049                elementNameIndex, Const.CONSTANT_Utf8);
050        return c.getBytes();
051    }
052
053    public final ElementValue getValue()
054    {
055        return elementValue;
056    }
057
058    public int getNameIndex()
059    {
060        return elementNameIndex;
061    }
062
063    public String toShortString()
064    {
065        final StringBuilder result = new StringBuilder();
066        result.append(getNameString()).append("=").append(
067                getValue().toShortString());
068        return result.toString();
069    }
070
071    protected void dump(final DataOutputStream dos) throws IOException {
072        dos.writeShort(elementNameIndex); // u2 name of the element
073        elementValue.dump(dos);
074    }
075}