| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.util; |
| |
| import java.util.Arrays; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| /** |
| * Wrapper for byte[] to use byte[] as key in HashMap |
| */ |
| @InterfaceAudience.Private |
| public class ByteArray { |
| private int hash = 0; // cache the hash code |
| private final byte[] bytes; |
| |
| public ByteArray(byte[] bytes) { |
| this.bytes = bytes; |
| } |
| |
| public byte[] getBytes() { |
| return bytes; |
| } |
| |
| @Override |
| public int hashCode() { |
| if (hash == 0) { |
| hash = Arrays.hashCode(bytes); |
| } |
| return hash; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof ByteArray)) { |
| return false; |
| } |
| return Arrays.equals(bytes, ((ByteArray)o).bytes); |
| } |
| } |