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The open-source Java obfuscation tool working with Ant and Gradle by yWorks - the diagramming experts
There is a newer version: 2.10.0
/**
 * YGuard -- an obfuscation library for Java(TM) classfiles.
 *
 * Original Copyright (c) 1999 Mark Welsh ([email protected])
 * Modifications Copyright (c) 2002 yWorks GmbH ([email protected])
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * The author may be contacted at [email protected] 
 *
 * Java and all Java-based marks are trademarks or registered 
 * trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
 */
package com.yworks.yguard.obf.classfile;

import java.io.*;
import java.util.*;

/**
 * Representation of an Local Variable table entry.
 *
 * @author      Mark Welsh
 */
public class LocalVariableInfo
{
    // Constants -------------------------------------------------------------


    // Fields ----------------------------------------------------------------
    private int u2startpc;
    private int u2length;
    private int u2nameIndex;
    private int u2descriptorIndex;
    private int u2index;


    // Class Methods ---------------------------------------------------------
    public static LocalVariableInfo create(DataInput din) throws java.io.IOException
    {
      if (din == null) throw new NullPointerException("DataInput cannot be null!");
        LocalVariableInfo lvi = new LocalVariableInfo();
        lvi.read(din);
        return lvi;
    }


    // Instance Methods ------------------------------------------------------
    private LocalVariableInfo() {}

    /** Return name index into Constant Pool. */
    protected int getNameIndex() {return u2nameIndex;}

    /** Set the name index. */
    protected void setNameIndex(int index) {u2nameIndex = index;}

    /** Return descriptor index into Constant Pool. */
    protected int getDescriptorIndex() {return u2descriptorIndex;}

    /** Set the descriptor index. */
    protected void setDescriptorIndex(int index) {u2descriptorIndex = index;}

    /** Check for Utf8 references to constant pool and mark them. */
    protected void markUtf8Refs(ConstantPool pool) 
    {
        pool.incRefCount(u2nameIndex);
        pool.incRefCount(u2descriptorIndex);
    }

    private void read(DataInput din) throws java.io.IOException
    {
        u2startpc = din.readUnsignedShort();
        u2length = din.readUnsignedShort();
        u2nameIndex = din.readUnsignedShort();
        u2descriptorIndex = din.readUnsignedShort();
        u2index = din.readUnsignedShort();
    }

    /** Export the representation to a DataOutput stream. */
    public void write(DataOutput dout) throws java.io.IOException
    {
        dout.writeShort(u2startpc);
        dout.writeShort(u2length);
        dout.writeShort(u2nameIndex);
        dout.writeShort(u2descriptorIndex);
        dout.writeShort(u2index);
    }
}