1 /*
2 * Copyright 2011 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 package org.apache.hadoop.hbase.util;
21
22 import java.util.Arrays;
23
24 /**
25 * This class encapsulates a byte array and overrides hashCode and equals so
26 * that it's identity is based on the data rather than the array instance.
27 */
28 public class HashedBytes {
29
30 private final byte[] bytes;
31 private final int hashCode;
32
33 public HashedBytes(byte[] bytes) {
34 this.bytes = bytes;
35 hashCode = Bytes.hashCode(bytes);
36 }
37
38 public byte[] getBytes() {
39 return bytes;
40 }
41
42 @Override
43 public int hashCode() {
44 return hashCode;
45 }
46
47 @Override
48 public boolean equals(Object obj) {
49 if (this == obj)
50 return true;
51 if (obj == null || getClass() != obj.getClass())
52 return false;
53 HashedBytes other = (HashedBytes) obj;
54 return Arrays.equals(bytes, other.bytes);
55 }
56
57 @Override
58 public String toString() {
59 return Bytes.toStringBinary(bytes);
60 }
61 }