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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * Javassist, a Java-bytecode translator toolkit.
 * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License.  Alternatively, the contents of this file may be used under
 * the terms of the GNU Lesser General Public License Version 2.1 or later,
 * or the Apache License Version 2.0.
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 */

package com.feilong.lib.javassist.bytecode;

import java.io.DataInputStream;
import java.io.IOException;
import java.util.Map;

/**
 * ConstantValue_attribute.
 */
public class ConstantAttribute extends AttributeInfo{

    /**
     * The name of this attribute "ConstantValue".
     */
    public static final String tag = "ConstantValue";

    ConstantAttribute(ConstPool cp, int n, DataInputStream in) throws IOException{
        super(cp, n, in);
    }

    /**
     * Constructs a ConstantValue attribute.
     *
     * @param cp
     *            a constant pool table.
     * @param index
     *            constantvalue_index
     *            of ConstantValue_attribute.
     */
    public ConstantAttribute(ConstPool cp, int index){
        super(cp, tag);
        byte[] bvalue = new byte[2];
        bvalue[0] = (byte) (index >>> 8);
        bvalue[1] = (byte) index;
        set(bvalue);
    }

    /**
     * Returns constantvalue_index.
     */
    public int getConstantValue(){
        return ByteArray.readU16bit(get(), 0);
    }

    /**
     * Makes a copy. Class names are replaced according to the
     * given Map object.
     *
     * @param newCp
     *            the constant pool table used by the new copy.
     * @param classnames
     *            pairs of replaced and substituted
     *            class names.
     */
    @Override
    public AttributeInfo copy(ConstPool newCp,Map classnames){
        int index = getConstPool().copy(getConstantValue(), newCp, classnames);
        return new ConstantAttribute(newCp, index);
    }
}