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.filter;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertTrue;
022
023import java.nio.ByteBuffer;
024import org.apache.hadoop.hbase.ByteBufferKeyValue;
025import org.apache.hadoop.hbase.Cell;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.KeyValue;
028import org.apache.hadoop.hbase.PrivateCellUtil;
029import org.apache.hadoop.hbase.testclassification.MiscTests;
030import org.apache.hadoop.hbase.testclassification.SmallTests;
031import org.apache.hadoop.hbase.util.Bytes;
032import org.junit.ClassRule;
033import org.junit.Test;
034import org.junit.experimental.categories.Category;
035
036@Category({MiscTests.class, SmallTests.class})
037public class TestComparators {
038
039  @ClassRule
040  public static final HBaseClassTestRule CLASS_RULE =
041      HBaseClassTestRule.forClass(TestComparators.class);
042
043  @Test
044  public void testCellFieldsCompare() throws Exception {
045    byte[] r0 = Bytes.toBytes("row0");
046    byte[] r1 = Bytes.toBytes("row1");
047    byte[] r2 = Bytes.toBytes("row2");
048    byte[] f = Bytes.toBytes("cf1");
049    byte[] q1 = Bytes.toBytes("qual1");
050    byte[] q2 = Bytes.toBytes("qual2");
051    byte[] q3 = Bytes.toBytes("r");
052    long l1 = 1234L;
053    byte[] v1 = Bytes.toBytes(l1);
054    long l2 = 2000L;
055    byte[] v2 = Bytes.toBytes(l2);
056    // Row compare
057    KeyValue kv = new KeyValue(r1, f, q1, v1);
058    ByteBuffer buffer = ByteBuffer.wrap(kv.getBuffer());
059    Cell bbCell = new ByteBufferKeyValue(buffer, 0, buffer.remaining());
060    ByteArrayComparable comparable = new BinaryComparator(r1);
061    assertEquals(0, PrivateCellUtil.compareRow(bbCell, comparable));
062    assertEquals(0, PrivateCellUtil.compareRow(kv, comparable));
063    kv = new KeyValue(r0, f, q1, v1);
064    buffer = ByteBuffer.wrap(kv.getBuffer());
065    bbCell = new ByteBufferKeyValue(buffer, 0, buffer.remaining());
066    assertTrue(PrivateCellUtil.compareRow(bbCell, comparable) > 0);
067    assertTrue(PrivateCellUtil.compareRow(kv, comparable) > 0);
068    kv = new KeyValue(r2, f, q1, v1);
069    buffer = ByteBuffer.wrap(kv.getBuffer());
070    bbCell = new ByteBufferKeyValue(buffer, 0, buffer.remaining());
071    assertTrue(PrivateCellUtil.compareRow(bbCell, comparable) < 0);
072    assertTrue(PrivateCellUtil.compareRow(kv, comparable) < 0);
073    // Qualifier compare
074    comparable = new BinaryPrefixComparator(Bytes.toBytes("qual"));
075    assertEquals(0, PrivateCellUtil.compareQualifier(bbCell, comparable));
076    assertEquals(0, PrivateCellUtil.compareQualifier(kv, comparable));
077    kv = new KeyValue(r2, f, q2, v1);
078    buffer = ByteBuffer.wrap(kv.getBuffer());
079    bbCell = new ByteBufferKeyValue(buffer, 0, buffer.remaining());
080    assertEquals(0, PrivateCellUtil.compareQualifier(bbCell, comparable));
081    assertEquals(0, PrivateCellUtil.compareQualifier(kv, comparable));
082    kv = new KeyValue(r2, f, q3, v1);
083    buffer = ByteBuffer.wrap(kv.getBuffer());
084    bbCell = new ByteBufferKeyValue(buffer, 0, buffer.remaining());
085    assertTrue(PrivateCellUtil.compareQualifier(bbCell, comparable) < 0);
086    assertTrue(PrivateCellUtil.compareQualifier(kv, comparable) < 0);
087    // Value compare
088    comparable = new LongComparator(l1);
089    assertEquals(0, PrivateCellUtil.compareValue(bbCell, comparable));
090    assertEquals(0, PrivateCellUtil.compareValue(kv, comparable));
091    kv = new KeyValue(r1, f, q1, v2);
092    buffer = ByteBuffer.wrap(kv.getBuffer());
093    bbCell = new ByteBufferKeyValue(buffer, 0, buffer.remaining());
094    assertTrue(PrivateCellUtil.compareValue(bbCell, comparable) < 0);
095    assertTrue(PrivateCellUtil.compareValue(kv, comparable) < 0);
096    // Family compare
097    comparable = new SubstringComparator("cf");
098    assertEquals(0, PrivateCellUtil.compareFamily(bbCell, comparable));
099    assertEquals(0, PrivateCellUtil.compareFamily(kv, comparable));
100  }
101}