serializebool.java

来自「High performance DB query」· Java 代码 · 共 248 行

/*
 * @(#)$Id: SerializeBool.java,v 1.6 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;

/**
 * Class SerializeBool
 *
 */
public class SerializeBool {

    /**
     * Method offsetValue
     *
     * @param value
     * @param offset
     * @return
     */
    protected static byte offsetValue(boolean value, int offset) {
        if (value) {
            return (byte) (1 << offset);
        } else {
            return 0;
        }
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1) {
        serialize(outputBuffer, (offsetValue(value1, 0)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     * @param value2
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1, boolean value2) {
        serialize(outputBuffer,
                  (byte) (offsetValue(value1, 0) + offsetValue(value2, 1)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     * @param value2
     * @param value3
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1, boolean value2,
                                 boolean value3) {
        serialize(outputBuffer,
                  (byte) (offsetValue(value1, 0) + offsetValue(value2, 1)
                          + offsetValue(value3, 2)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     * @param value2
     * @param value3
     * @param value4
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1, boolean value2,
                                 boolean value3, boolean value4) {
        serialize(outputBuffer,
                  (byte) (offsetValue(value1, 0) + offsetValue(value2, 1)
                          + offsetValue(value3, 2) + offsetValue(value4, 3)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     * @param value2
     * @param value3
     * @param value4
     * @param value5
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1, boolean value2,
                                 boolean value3, boolean value4,
                                 boolean value5) {
        serialize(outputBuffer,
                  (byte) (offsetValue(value1, 0) + offsetValue(value2, 1)
                          + offsetValue(value3, 2) + offsetValue(value4, 3)
                          + offsetValue(value5, 4)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     * @param value2
     * @param value3
     * @param value4
     * @param value5
     * @param value6
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1, boolean value2,
                                 boolean value3, boolean value4,
                                 boolean value5, boolean value6) {
        serialize(outputBuffer,
                  (byte) (offsetValue(value1, 0) + offsetValue(value2, 1)
                          + offsetValue(value3, 2) + offsetValue(value4, 3)
                          + offsetValue(value5, 4) + offsetValue(value6, 5)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     * @param value2
     * @param value3
     * @param value4
     * @param value5
     * @param value6
     * @param value7
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1, boolean value2,
                                 boolean value3, boolean value4,
                                 boolean value5, boolean value6,
                                 boolean value7) {
        serialize(outputBuffer,
                  (byte) (offsetValue(value1, 0) + offsetValue(value2, 1)
                          + offsetValue(value3, 2) + offsetValue(value4, 3)
                          + offsetValue(value5, 4) + offsetValue(value6, 5)
                          + offsetValue(value7, 6)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value1
     * @param value2
     * @param value3
     * @param value4
     * @param value5
     * @param value6
     * @param value7
     * @param value8
     */
    public static void serialize(GenericByteBuffer outputBuffer,
                                 boolean value1, boolean value2,
                                 boolean value3, boolean value4,
                                 boolean value5, boolean value6,
                                 boolean value7, boolean value8) {
        serialize(outputBuffer,
                  (byte) (offsetValue(value1, 0) + offsetValue(value2, 1)
                          + offsetValue(value3, 2) + offsetValue(value4, 3)
                          + offsetValue(value5, 4) + offsetValue(value6, 5)
                          + offsetValue(value7, 6) + offsetValue(value8, 7)));
    }

    /**
     * Method serialize
     *
     * @param outputBuffer
     * @param value
     */
    protected static void serialize(GenericByteBuffer outputBuffer,
                                    byte value) {
        outputBuffer.put(value);
    }

    /**
     * Method isOffsetSet
     *
     * @param theData
     * @param offset
     * @return
     */
    protected static boolean isOffsetSet(byte theData, int offset) {
        byte newValue = (byte) (theData << (7 - offset));

        if (newValue >= 0) {
            return false;
        } else {
            return true;
        }
    }

    /**
     * Method deSerialize
     *
     * @param inputBuffer
     * @return
     */
    public static boolean deSerialize(GenericByteBuffer inputBuffer) {
        return isOffsetSet(inputBuffer.get(), 0);
    }

    /**
     * Method deSerialize
     *
     * @param inputBuffer
     * @param numBooleans
     * @return
     */
    public static boolean[] deSerialize(GenericByteBuffer inputBuffer,
                                        int numBooleans) {
        boolean obj[] = new boolean[numBooleans];
        byte theData = inputBuffer.get();

        for (int i = 0; i < numBooleans; i++) {
            obj[i] = isOffsetSet(theData, i);
        }

        return obj;
    }
}