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    // For primitive types and string type, this points to the value entry in
032    // the cpool
033    // For 'class' this points to the class entry in the cpool
034    private final int idx;
035
036    public ClassElementValueGen(final ClassElementValue value, final ConstantPoolGen cpool, final boolean copyPoolEntries) {
037        super(CLASS, cpool);
038        if (copyPoolEntries) {
039            // idx = cpool.addClass(value.getClassString());
040            idx = cpool.addUtf8(value.getClassString());
041        } else {
042            idx = value.getIndex();
043        }
044    }
045
046    protected ClassElementValueGen(final int typeIdx, final ConstantPoolGen cpool) {
047        super(ElementValueGen.CLASS, cpool);
048        this.idx = typeIdx;
049    }
050
051    public ClassElementValueGen(final ObjectType t, final ConstantPoolGen cpool) {
052        super(ElementValueGen.CLASS, cpool);
053        // this.idx = cpool.addClass(t);
054        idx = cpool.addUtf8(t.getSignature());
055    }
056
057    @Override
058    public void dump(final DataOutputStream dos) throws IOException {
059        dos.writeByte(super.getElementValueType()); // u1 kind of value
060        dos.writeShort(idx);
061    }
062
063    public String getClassString() {
064        final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(idx);
065        return cu8.getBytes();
066        // ConstantClass c = (ConstantClass)getConstantPool().getConstant(idx);
067        // ConstantUtf8 utf8 =
068        // (ConstantUtf8)getConstantPool().getConstant(c.getNameIndex());
069        // return utf8.getBytes();
070    }
071
072    /**
073     * Return immutable variant of this ClassElementValueGen
074     */
075    @Override
076    public ElementValue getElementValue() {
077        return new ClassElementValue(super.getElementValueType(), idx, getConstantPool().getConstantPool());
078    }
079
080    public int getIndex() {
081        return idx;
082    }
083
084    @Override
085    public String stringifyValue() {
086        return getClassString();
087    }
088}