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Apache Commons Bytecode Engineering Library, with type annotations
There is a newer version: 6.5.0
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.bcel.generic;

import java.io.DataOutputStream;
import java.io.IOException;

import org.apache.bcel.classfile.ClassElementValue;
import org.apache.bcel.classfile.ConstantUtf8;
import org.apache.bcel.classfile.ElementValue;

/**
 * @since 6.0
 */
public class ClassElementValueGen extends ElementValueGen
{
    // For primitive types and string type, this points to the value entry in
    // the cpool
    // For 'class' this points to the class entry in the cpool
    private int idx;

    protected ClassElementValueGen(final int typeIdx, final ConstantPoolGen cpool)
    {
        super(ElementValueGen.CLASS, cpool);
        this.idx = typeIdx;
    }

    public ClassElementValueGen(final ObjectType t, final ConstantPoolGen cpool)
    {
        super(ElementValueGen.CLASS, cpool);
        // this.idx = cpool.addClass(t);
        idx = cpool.addUtf8(t.getSignature());
    }

    /**
     * Return immutable variant of this ClassElementValueGen
     */
    @Override
    public ElementValue getElementValue()
    {
        return new ClassElementValue(super.getElementValueType(),
                idx,
                getConstantPool().getConstantPool());
    }

    public ClassElementValueGen(final ClassElementValue value, final ConstantPoolGen cpool,
            final boolean copyPoolEntries)
    {
        super(CLASS, cpool);
        if (copyPoolEntries)
        {
            // idx = cpool.addClass(value.getClassString());
            idx = cpool.addUtf8(value.getClassString());
        }
        else
        {
            idx = value.getIndex();
        }
    }

    public int getIndex()
    {
        return idx;
    }

    public String getClassString()
    {
        final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(idx);
        return cu8.getBytes();
        // ConstantClass c = (ConstantClass)getConstantPool().getConstant(idx);
        // ConstantUtf8 utf8 =
        // (ConstantUtf8)getConstantPool().getConstant(c.getNameIndex());
        // return utf8.getBytes();
    }

    @Override
    public String stringifyValue()
    {
        return getClassString();
    }

    @Override
    public void dump(final DataOutputStream dos) throws IOException
    {
        dos.writeByte(super.getElementValueType()); // u1 kind of value
        dos.writeShort(idx);
    }
}