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}