001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.util;
019
020import static org.junit.jupiter.api.Assertions.assertTrue;
021
022import java.nio.ByteBuffer;
023import org.apache.hadoop.hbase.nio.ByteBuff;
024import org.apache.hadoop.hbase.nio.MultiByteBuff;
025import org.apache.hadoop.hbase.nio.SingleByteBuff;
026import org.apache.hadoop.hbase.testclassification.MiscTests;
027import org.apache.hadoop.hbase.testclassification.SmallTests;
028import org.junit.jupiter.api.Tag;
029import org.junit.jupiter.api.Test;
030
031@Tag(MiscTests.TAG)
032@Tag(SmallTests.TAG)
033public class TestByteBuffUtils {
034
035  @Test
036  public void testCopyAndCompare() throws Exception {
037    ByteBuffer bb1 = ByteBuffer.allocate(50);
038    ByteBuffer bb2 = ByteBuffer.allocate(50);
039    MultiByteBuff src = new MultiByteBuff(bb1, bb2);
040    for (int i = 0; i < 7; i++) {
041      src.putLong(8L);
042    }
043    src.put((byte) 1);
044    src.put((byte) 1);
045    ByteBuffer bb3 = ByteBuffer.allocate(50);
046    ByteBuffer bb4 = ByteBuffer.allocate(50);
047    MultiByteBuff mbbDst = new MultiByteBuff(bb3, bb4);
048    // copy from MBB to MBB
049    mbbDst.put(0, src, 0, 100);
050    int compareTo = ByteBuff.compareTo(src, 0, 100, mbbDst, 0, 100);
051    assertTrue(compareTo == 0);
052    // Copy from MBB to SBB
053    bb3 = ByteBuffer.allocate(100);
054    SingleByteBuff sbbDst = new SingleByteBuff(bb3);
055    src.rewind();
056    sbbDst.put(0, src, 0, 100);
057    compareTo = ByteBuff.compareTo(src, 0, 100, sbbDst, 0, 100);
058    assertTrue(compareTo == 0);
059    // Copy from SBB to SBB
060    bb3 = ByteBuffer.allocate(100);
061    SingleByteBuff sbb = new SingleByteBuff(bb3);
062    for (int i = 0; i < 7; i++) {
063      sbb.putLong(8L);
064    }
065    sbb.put((byte) 1);
066    sbb.put((byte) 1);
067    bb4 = ByteBuffer.allocate(100);
068    sbbDst = new SingleByteBuff(bb4);
069    sbbDst.put(0, sbb, 0, 100);
070    compareTo = ByteBuff.compareTo(sbb, 0, 100, sbbDst, 0, 100);
071    assertTrue(compareTo == 0);
072    // copy from SBB to MBB
073    sbb.rewind();
074    mbbDst = new MultiByteBuff(bb3, bb4);
075    mbbDst.rewind();
076    mbbDst.put(0, sbb, 0, 100);
077    compareTo = ByteBuff.compareTo(sbb, 0, 100, mbbDst, 0, 100);
078    assertTrue(compareTo == 0);
079  }
080}