001 /* 002 * Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved. 003 * 004 * Project and contact information: http://www.cascading.org/ 005 * 006 * This file is part of the Cascading project. 007 * 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 */ 020 021 package cascading.tuple.hadoop; 022 023 import java.io.DataInputStream; 024 import java.io.DataOutputStream; 025 import java.io.IOException; 026 import java.io.InputStream; 027 import java.io.OutputStream; 028 import java.math.BigDecimal; 029 import java.math.BigInteger; 030 031 import org.apache.hadoop.conf.Configured; 032 import org.apache.hadoop.io.serializer.Deserializer; 033 import org.apache.hadoop.io.serializer.Serialization; 034 import org.apache.hadoop.io.serializer.Serializer; 035 036 /** 037 * Class BigDecimalSerialization is an implementation of Hadoop's {@link org.apache.hadoop.io.serializer.Serialization} interface for use 038 * by {@link BigDecimal} instances. 039 * <p/> 040 * To use, call<br/> 041 * {@code TupleSerializationProps.addSerialization(properties, BigDecimalSerialization.class.getName());} 042 * <p/> 043 * 044 * @see cascading.tuple.hadoop.TupleSerializationProps#addSerialization(java.util.Map, String) 045 */ 046 @SerializationToken(tokens = {125}, classNames = {"java.math.BigDecimal"}) 047 public class BigDecimalSerialization extends Configured implements Serialization<BigDecimal> 048 { 049 public static class BigDecimalDeserializer implements Deserializer<BigDecimal> 050 { 051 private DataInputStream in; 052 053 @Override 054 public void open( InputStream in ) throws IOException 055 { 056 if( in instanceof DataInputStream ) 057 this.in = (DataInputStream) in; 058 else 059 this.in = new DataInputStream( in ); 060 } 061 062 @Override 063 public BigDecimal deserialize( BigDecimal existing ) throws IOException 064 { 065 int len = in.readInt(); 066 byte[] valueBytes = new byte[ len ]; 067 068 in.readFully( valueBytes ); 069 070 BigInteger value = new BigInteger( valueBytes ); 071 072 return new BigDecimal( value, in.readInt() ); 073 } 074 075 @Override 076 public void close() throws IOException 077 { 078 in.close(); 079 } 080 } 081 082 public static class BigDecimalSerializer implements Serializer<BigDecimal> 083 { 084 private DataOutputStream out; 085 086 @Override 087 public void open( OutputStream out ) throws IOException 088 { 089 if( out instanceof DataOutputStream ) 090 this.out = (DataOutputStream) out; 091 else 092 this.out = new DataOutputStream( out ); 093 } 094 095 @Override 096 public void serialize( BigDecimal bigDecimal ) throws IOException 097 { 098 BigInteger value = bigDecimal.unscaledValue(); 099 byte[] valueBytes = value.toByteArray(); 100 101 out.writeInt( valueBytes.length ); 102 out.write( valueBytes ); 103 out.writeInt( bigDecimal.scale() ); 104 } 105 106 @Override 107 public void close() throws IOException 108 { 109 out.close(); 110 } 111 } 112 113 114 public BigDecimalSerialization() 115 { 116 } 117 118 @Override 119 public boolean accept( Class<?> c ) 120 { 121 return BigDecimal.class == c; 122 } 123 124 @Override 125 public Serializer<BigDecimal> getSerializer( Class<BigDecimal> c ) 126 { 127 return new BigDecimalSerializer(); 128 } 129 130 @Override 131 public Deserializer<BigDecimal> getDeserializer( Class<BigDecimal> c ) 132 { 133 return new BigDecimalDeserializer(); 134 } 135 }