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The MongoDB Java Driver uber-artifact, containing mongodb-driver, mongodb-driver-core, and bson

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/*
 * Copyright 2014-2015 MongoDB, Inc.
 *
 * Licensed 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.
 */

package org.bson.codecs;

final class UuidCodecHelper {
    // reverse elements in the subarray data[start:start+length]
    public static void reverseByteArray(final byte[] data, final int start, final int length) {
        for (int left = start, right = start + length - 1; left < right; left++, right--) {
            // swap the values at the left and right indices
            byte temp = data[left];
            data[left]  = data[right];
            data[right] = temp;
        }
    }

    private UuidCodecHelper() {
    }
}