001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.io.serializer;
020
021import java.io.IOException;
022import java.io.Serializable;
023
024import org.apache.hadoop.classification.InterfaceAudience;
025import org.apache.hadoop.classification.InterfaceStability;
026import org.apache.hadoop.io.RawComparator;
027
028/**
029 * <p>
030 * A {@link RawComparator} that uses a {@link JavaSerialization}
031 * {@link Deserializer} to deserialize objects that are then compared via
032 * their {@link Comparable} interfaces.
033 * </p>
034 * @param <T>
035 * @see JavaSerialization
036 */
037@InterfaceAudience.Public
038@InterfaceStability.Unstable
039public class JavaSerializationComparator<T extends Serializable&Comparable<T>>
040  extends DeserializerComparator<T> {
041
042  @InterfaceAudience.Private
043  public JavaSerializationComparator() throws IOException {
044    super(new JavaSerialization.JavaSerializationDeserializer<T>());
045  }
046
047  @Override
048  @InterfaceAudience.Private
049  public int compare(T o1, T o2) {
050    return o1.compareTo(o2);
051  }
052
053}