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.generic;
019
020import java.io.DataOutputStream;
021import java.io.IOException;
022
023import org.apache.bcel.classfile.ClassElementValue;
024import org.apache.bcel.classfile.ConstantUtf8;
025import org.apache.bcel.classfile.ElementValue;
026
027/**
028 * @since 6.0
029 */
030public class ClassElementValueGen extends ElementValueGen
031{
032    // For primitive types and string type, this points to the value entry in
033    // the cpool
034    // For 'class' this points to the class entry in the cpool
035    private int idx;
036
037    protected ClassElementValueGen(final int typeIdx, final ConstantPoolGen cpool)
038    {
039        super(ElementValueGen.CLASS, cpool);
040        this.idx = typeIdx;
041    }
042
043    public ClassElementValueGen(final ObjectType t, final ConstantPoolGen cpool)
044    {
045        super(ElementValueGen.CLASS, cpool);
046        // this.idx = cpool.addClass(t);
047        idx = cpool.addUtf8(t.getSignature());
048    }
049
050    /**
051     * Return immutable variant of this ClassElementValueGen
052     */
053    @Override
054    public ElementValue getElementValue()
055    {
056        return new ClassElementValue(super.getElementValueType(),
057                idx,
058                getConstantPool().getConstantPool());
059    }
060
061    public ClassElementValueGen(final ClassElementValue value, final ConstantPoolGen cpool,
062            final boolean copyPoolEntries)
063    {
064        super(CLASS, cpool);
065        if (copyPoolEntries)
066        {
067            // idx = cpool.addClass(value.getClassString());
068            idx = cpool.addUtf8(value.getClassString());
069        }
070        else
071        {
072            idx = value.getIndex();
073        }
074    }
075
076    public int getIndex()
077    {
078        return idx;
079    }
080
081    public String getClassString()
082    {
083        final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(idx);
084        return cu8.getBytes();
085        // ConstantClass c = (ConstantClass)getConstantPool().getConstant(idx);
086        // ConstantUtf8 utf8 =
087        // (ConstantUtf8)getConstantPool().getConstant(c.getNameIndex());
088        // return utf8.getBytes();
089    }
090
091    @Override
092    public String stringifyValue()
093    {
094        return getClassString();
095    }
096
097    @Override
098    public void dump(final DataOutputStream dos) throws IOException
099    {
100        dos.writeByte(super.getElementValueType()); // u1 kind of value
101        dos.writeShort(idx);
102    }
103}