serializemap.java

来自「High performance DB query」· Java 代码 · 共 257 行

/*
 * @(#)$Id: SerializeMap.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.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import services.network.Payload;

/**
 * Class SerializeMap
 *
 */
public class SerializeMap {

    public static final byte NULL_VALUE = -1;

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

        outputBuffer.putInt(mapSize);

        if (theObject == null) {
            return;
        }

        Iterator entries = theObject.entrySet().iterator();

        while (entries.hasNext()) {
            Map.Entry theEntry = (Map.Entry) entries.next();
            Object theKey = theEntry.getKey();
            Object theValue = theEntry.getValue();

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

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

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

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

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

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

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

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

        return theObject;
    }

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

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

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

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

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

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

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

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

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

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

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