serializebiginteger.java

High performance DB query

/*
 * @(#)$Id: SerializeBigInteger.java,v 1.7 2004/07/02 23:59:22 huebsch Exp $
 *
 * Copyright (c) 2001-2004 Regents of the University of California.
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached BERKELEY-LICENSE
 * file. If you do not find these files, copies can be found by writing to:
 * Computer Science Division, Database Group, Universite of California,
 * 617 Soda Hall #1776, Berkeley, CA 94720-1776. Attention: Berkeley License
 *
 * Copyright (c) 2003-2004 Intel Corporation. All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE file.
 * If you do not find these files, copies can be found by writing to:
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300,
 * Berkeley, CA, 94704.  Attention:  Intel License Inquiry.
 */


package util.network.serialization;

import java.math.BigInteger;

/**
 * Class SerializeBigInteger
 *
 */
public class SerializeBigInteger {

    public static final byte NULL_VALUE = -1;

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 BigInteger value) {
        byte length = NULL_VALUE;
        byte theData[] = null;

        if (value != null) {
            theData = value.toByteArray();
            length = (byte) theData.length;
        }

        outputBuffer.put(length);

        for (int i = 0; i < length; i++) {
            outputBuffer.put(theData[i]);
        }
    }

    /**
     * Method deSerialize
     *
     * @param inputBuffer
     * @return
     */
    public static BigInteger deSerialize(GenericByteBuffer inputBuffer) {
        byte length = inputBuffer.get();

        if (length == NULL_VALUE) {
            return null;
        }

        byte theData[] = new byte[length];

        for (int i = 0; i < length; i++) {
            theData[i] = inputBuffer.get();
        }

        return new BigInteger(theData);
    }
}