1 /*
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase.util;
20
21 import java.util.Arrays;
22
23 import org.apache.hadoop.hbase.classification.InterfaceAudience;
24 import org.apache.hadoop.hbase.classification.InterfaceStability;
25
26 /**
27 * This class encapsulates a byte array and overrides hashCode and equals so
28 * that it's identity is based on the data rather than the array instance.
29 */
30 @InterfaceAudience.Private
31 @InterfaceStability.Stable
32 public class HashedBytes {
33
34 private final byte[] bytes;
35 private final int hashCode;
36
37 public HashedBytes(byte[] bytes) {
38 this.bytes = bytes;
39 hashCode = Bytes.hashCode(bytes);
40 }
41
42 public byte[] getBytes() {
43 return bytes;
44 }
45
46 @Override
47 public int hashCode() {
48 return hashCode;
49 }
50
51 @Override
52 public boolean equals(Object obj) {
53 if (this == obj)
54 return true;
55 if (obj == null || getClass() != obj.getClass())
56 return false;
57 HashedBytes other = (HashedBytes) obj;
58 return (hashCode == other.hashCode) && Arrays.equals(bytes, other.bytes);
59 }
60
61 @Override
62 public String toString() {
63 return Bytes.toStringBinary(bytes);
64 }
65 }