1 /*
2 * Copyright 2010 The Apache Software Foundation
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package org.apache.hadoop.hbase.filter;
22
23 import org.apache.hadoop.hbase.util.Bytes;
24
25 /**
26 * A comparator which compares against a specified byte array, but only compares
27 * up to the length of this byte array. For the rest it is similar to
28 * {@link BinaryComparator}.
29 */
30 public class BinaryPrefixComparator extends WritableByteArrayComparable {
31
32 /** Nullary constructor for Writable, do not use */
33 public BinaryPrefixComparator() { }
34
35 /**
36 * Constructor
37 * @param value value
38 */
39 public BinaryPrefixComparator(byte[] value) {
40 super(value);
41 }
42
43 @Override
44 public int compareTo(byte [] value) {
45 if (this.value.length <= value.length) {
46 return Bytes.compareTo(this.value, 0, this.value.length, value, 0,
47 this.value.length);
48 } else {
49 return Bytes.compareTo(this.value, value);
50 }
51 }
52
53 }