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
023/**
024 * An annotation's element value pair.
025 *
026 * @since 6.0
027 */
028public class ElementValuePair {
029
030    static final ElementValuePair[] EMPTY_ARRAY = {};
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, final ConstantPool constantPool) {
039        this.elementValue = elementValue;
040        this.elementNameIndex = elementNameIndex;
041        this.constantPool = constantPool;
042    }
043
044    protected void dump(final DataOutputStream dos) throws IOException {
045        dos.writeShort(elementNameIndex); // u2 name of the element
046        elementValue.dump(dos);
047    }
048
049    public int getNameIndex() {
050        return elementNameIndex;
051    }
052
053    public String getNameString() {
054        return constantPool.getConstantUtf8(elementNameIndex).getBytes();
055    }
056
057    public final ElementValue getValue() {
058        return elementValue;
059    }
060
061    public String toShortString() {
062        final StringBuilder result = new StringBuilder();
063        result.append(getNameString()).append("=").append(getValue().toShortString());
064        return result.toString();
065    }
066}