/**
* 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.fs;
import java.util.Arrays;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.io.Writable;
/** An abstract class representing file checksums for files. */
@InterfaceAudience.Public
@InterfaceStability.Stable
public abstract class FileChecksum implements Writable {
/** The checksum algorithm name */
public abstract String getAlgorithmName();
/** The length of the checksum in bytes */
public abstract int getLength();
/** The value of the checksum in bytes */
public abstract byte[] getBytes();
/** Return true if both the algorithms and the values are the same. */
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
}
if (other == null || !(other instanceof FileChecksum)) {
return false;
}
final FileChecksum that = (FileChecksum)other;
return this.getAlgorithmName().equals(that.getAlgorithmName())
&& Arrays.equals(this.getBytes(), that.getBytes());
}
@Override
public int hashCode() {
return getAlgorithmName().hashCode() ^ Arrays.hashCode(getBytes());
}
}