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 }