org.apache.hadoop.hdfs.util.ByteArray Maven / Gradle / Ivy
/**
* 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);
}
}