serializelist.java

High performance DB query

/*
 * @(#)$Id: SerializeList.java,v 1.6 2004/07/02 23:59:23 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.util.AbstractList;
import java.util.ArrayList;
import java.util.Vector;
import services.network.Payload;

/**
 * Class SerializeList
 *
 */
public class SerializeList {

    public static final byte NULL_VALUE = -1;

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param theObject
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 AbstractList theObject) {
        int listSize = (theObject == null)
                       ? NULL_VALUE
                       : theObject.size();

        outputBuffer.putInt(listSize);

        for (int i = 0; i < listSize; i++) {
            Object theData = theObject.get(i);

            if (theData instanceof Payload) {
                SerializationManager.serialize(outputBuffer, (Payload) theData);
            } else {
                SerializationManager.serializeExtended(outputBuffer, theData);
            }
        }
    }

    /**
     * Method serializeHomogenous
     *
     * @param outputBuffer
     * @param theObject
     */
    public static void serializeHomogenous(GenericByteBuffer outputBuffer,
                                           AbstractList theObject) {
        serialize(outputBuffer, theObject);
    }

    /**
     * Method deSerialize
     *
     * @param inputBuffer
     * @param theObject
     * @return
     */
    public static AbstractList deSerialize(GenericByteBuffer inputBuffer,
                                           AbstractList theObject) {
        int listSize = inputBuffer.getInt();

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

        for (int i = 0; i < listSize; i++) {
            theObject.add(
                i, SerializationManager.deSerializeExtended(inputBuffer));
        }

        return theObject;
    }

    /**
     * Method deSerializeHomogenous
     *
     * @param inputBuffer
     * @param theObject
     * @return
     */
    public static AbstractList deSerializeHomogenous(
            GenericByteBuffer inputBuffer, AbstractList theObject) {
        return deSerialize(inputBuffer, theObject);
    }

    /**
     * Method deSerializeVector
     *
     * @param inputBuffer
     * @return
     */
    public static Vector deSerializeVector(GenericByteBuffer inputBuffer) {
        return (Vector) deSerialize(inputBuffer, new Vector());
    }

    /**
     * Method deSerializeArrayList
     *
     * @param inputBuffer
     * @return
     */
    public static ArrayList deSerializeArrayList(
            GenericByteBuffer inputBuffer) {
        return (ArrayList) deSerialize(inputBuffer, new ArrayList());
    }

    /**
     * Method deSerializeHomogenousVector
     *
     * @param inputBuffer
     * @return
     */
    public static Vector deSerializeHomogenousVector(
            GenericByteBuffer inputBuffer) {
        return (Vector) deSerializeHomogenous(inputBuffer, new Vector());
    }

    /**
     * Method deSerializeHomogenousArrayList
     *
     * @param inputBuffer
     * @return
     */
    public static ArrayList deSerializeHomogenousArrayList(
            GenericByteBuffer inputBuffer) {
        return (ArrayList) deSerializeHomogenous(inputBuffer, new ArrayList());
    }
}