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 */ 018package org.apache.hadoop.hbase.mapreduce; 019 020import java.io.DataInputStream; 021import java.io.DataOutputStream; 022import java.io.IOException; 023import java.io.InputStream; 024import java.io.OutputStream; 025import org.apache.hadoop.hbase.KeyValue; 026import org.apache.hadoop.hbase.KeyValueUtil; 027import org.apache.hadoop.io.serializer.Deserializer; 028import org.apache.hadoop.io.serializer.Serialization; 029import org.apache.hadoop.io.serializer.Serializer; 030import org.apache.yetus.audience.InterfaceAudience; 031 032/** 033 * Use to specify the type of serialization for the mappers and reducers 034 * @deprecated Use {@link CellSerialization}. Will be removed from 3.0 onwards 035 */ 036@Deprecated 037@InterfaceAudience.Public 038public class KeyValueSerialization implements Serialization<KeyValue> { 039 @Override 040 public boolean accept(Class<?> c) { 041 return KeyValue.class.isAssignableFrom(c); 042 } 043 044 @Override 045 public KeyValueDeserializer getDeserializer(Class<KeyValue> t) { 046 return new KeyValueDeserializer(); 047 } 048 049 @Override 050 public KeyValueSerializer getSerializer(Class<KeyValue> c) { 051 return new KeyValueSerializer(); 052 } 053 054 public static class KeyValueDeserializer implements Deserializer<KeyValue> { 055 private DataInputStream dis; 056 057 @Override 058 public void close() throws IOException { 059 this.dis.close(); 060 } 061 062 @Override 063 public KeyValue deserialize(KeyValue ignore) throws IOException { 064 // I can't overwrite the passed in KV, not from a proto kv, not just yet. TODO 065 return KeyValueUtil.create(this.dis); 066 } 067 068 @Override 069 public void open(InputStream is) throws IOException { 070 this.dis = new DataInputStream(is); 071 } 072 } 073 074 public static class KeyValueSerializer implements Serializer<KeyValue> { 075 private DataOutputStream dos; 076 077 @Override 078 public void close() throws IOException { 079 this.dos.close(); 080 } 081 082 @Override 083 public void open(OutputStream os) throws IOException { 084 this.dos = new DataOutputStream(os); 085 } 086 087 @Override 088 public void serialize(KeyValue kv) throws IOException { 089 KeyValueUtil.write(kv, this.dos); 090 } 091 } 092}