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 */
017package org.apache.bcel.classfile;
018
019import java.io.DataOutputStream;
020import java.io.IOException;
021
022/**
023 * An annotation's element value pair.
024 *
025 * @since 6.0
026 */
027public class ElementValuePair {
028
029    static final ElementValuePair[] EMPTY_ARRAY = {};
030
031    private final ElementValue elementValue;
032
033    private final ConstantPool constantPool;
034
035    private final int elementNameIndex;
036
037    public ElementValuePair(final int elementNameIndex, final ElementValue elementValue, final ConstantPool constantPool) {
038        this.elementValue = elementValue;
039        this.elementNameIndex = elementNameIndex;
040        this.constantPool = constantPool;
041    }
042
043    protected void dump(final DataOutputStream dos) throws IOException {
044        dos.writeShort(elementNameIndex); // u2 name of the element
045        elementValue.dump(dos);
046    }
047
048    public int getNameIndex() {
049        return elementNameIndex;
050    }
051
052    public String getNameString() {
053        return constantPool.getConstantUtf8(elementNameIndex).getBytes();
054    }
055
056    public final ElementValue getValue() {
057        return elementValue;
058    }
059
060    public String toShortString() {
061        final StringBuilder result = new StringBuilder();
062        result.append(getNameString()).append("=").append(getValue().toShortString());
063        return result.toString();
064    }
065}