Java Integer to intToSortableBytes(int value, byte[] result, int offset)

Description

Encodes an integer value such that unsigned byte order comparison is consistent with Integer#compare(int,int)

License

Apache License

Declaration

public static void intToSortableBytes(int value, byte[] result, int offset) 

Method Source Code

//package com.java2s;
/*/*from   w w w .jav a  2  s  .  c o m*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /** 
     * Encodes an integer {@code value} such that unsigned byte order comparison
     * is consistent with {@link Integer#compare(int, int)}
     * @see #sortableBytesToInt(byte[], int)
     */
    public static void intToSortableBytes(int value, byte[] result, int offset) {
        // Flip the sign bit, so negative ints sort before positive ints correctly:
        value ^= 0x80000000;
        result[offset] = (byte) (value >> 24);
        result[offset + 1] = (byte) (value >> 16);
        result[offset + 2] = (byte) (value >> 8);
        result[offset + 3] = (byte) value;
    }
}

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