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.generic;
018
019import java.io.DataOutputStream;
020import java.io.IOException;
021
022import org.apache.bcel.classfile.ClassElementValue;
023import org.apache.bcel.classfile.ConstantUtf8;
024import org.apache.bcel.classfile.ElementValue;
025
026/**
027 * @since 6.0
028 */
029public class ClassElementValueGen extends ElementValueGen {
030    // For primitive types and string type, this points to the value entry in
031    // the cpool
032    // For 'class' this points to the class entry in the cpool
033    private final int idx;
034
035    public ClassElementValueGen(final ClassElementValue value, final ConstantPoolGen cpool, final boolean copyPoolEntries) {
036        super(CLASS, cpool);
037        if (copyPoolEntries) {
038            // idx = cpool.addClass(value.getClassString());
039            idx = cpool.addUtf8(value.getClassString());
040        } else {
041            idx = value.getIndex();
042        }
043    }
044
045    protected ClassElementValueGen(final int typeIdx, final ConstantPoolGen cpool) {
046        super(CLASS, cpool);
047        this.idx = typeIdx;
048    }
049
050    public ClassElementValueGen(final ObjectType t, final ConstantPoolGen cpool) {
051        super(CLASS, cpool);
052        // this.idx = cpool.addClass(t);
053        idx = cpool.addUtf8(t.getSignature());
054    }
055
056    @Override
057    public void dump(final DataOutputStream dos) throws IOException {
058        dos.writeByte(super.getElementValueType()); // u1 kind of value
059        dos.writeShort(idx);
060    }
061
062    public String getClassString() {
063        final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(idx);
064        return cu8.getBytes();
065        // ConstantClass c = (ConstantClass) getConstantPool().getConstant(idx);
066        // ConstantUtf8 utf8 =
067        // (ConstantUtf8) getConstantPool().getConstant(c.getNameIndex());
068        // return utf8.getBytes();
069    }
070
071    /**
072     * Return immutable variant of this ClassElementValueGen
073     */
074    @Override
075    public ElementValue getElementValue() {
076        return new ClassElementValue(super.getElementValueType(), idx, getConstantPool().getConstantPool());
077    }
078
079    public int getIndex() {
080        return idx;
081    }
082
083    @Override
084    public String stringifyValue() {
085        return getClassString();
086    }
087}