org.apache.mahout.cf.taste.hadoop.item

Class PartialMultiplyMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<VarIntWritable,VectorAndPrefsWritable,VarLongWritable,PrefAndSimilarityColumnWritable>

org.apache.mahout.cf.taste.hadoop.item.PartialMultiplyMapper

public final class PartialMultiplyMapper
extends org.apache.hadoop.mapreduce.Mapper<VarIntWritable,VectorAndPrefsWritable,VarLongWritable,PrefAndSimilarityColumnWritable>

maps similar items and their preference values per user

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor and Description
PartialMultiplyMapper()

Method Summary

Modifier and Type	Method and Description
protected void	map(VarIntWritable key, VectorAndPrefsWritable vectorAndPrefsWritable, org.apache.hadoop.mapreduce.Mapper.Context context)

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

cleanup, run, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PartialMultiplyMapper

public PartialMultiplyMapper()

Method Detail

map

protected void map(VarIntWritable key,
                   VectorAndPrefsWritable vectorAndPrefsWritable,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<VarIntWritable,VectorAndPrefsWritable,VarLongWritable,PrefAndSimilarityColumnWritable>

Throws:

IOException

InterruptedException