org.apache.mahout.cf.taste.hadoop.slopeone
Class SlopeOnePrefsToDiffsReducer

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.mahout.cf.taste.hadoop.slopeone.SlopeOnePrefsToDiffsReducer
All Implemented Interfaces:
java.io.Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.LongWritable,ItemPrefWritable,ItemItemWritable,org.apache.hadoop.io.FloatWritable>

public final class SlopeOnePrefsToDiffsReducer
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.LongWritable,ItemPrefWritable,ItemItemWritable,org.apache.hadoop.io.FloatWritable>


Constructor Summary
SlopeOnePrefsToDiffsReducer()
           
 
Method Summary
 void reduce(org.apache.hadoop.io.LongWritable key, java.util.Iterator<ItemPrefWritable> values, org.apache.hadoop.mapred.OutputCollector<ItemItemWritable,org.apache.hadoop.io.FloatWritable> output, org.apache.hadoop.mapred.Reporter reporter)
           
 
Methods inherited from class org.apache.hadoop.mapred.MapReduceBase
close, configure
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.hadoop.mapred.JobConfigurable
configure
 
Methods inherited from interface java.io.Closeable
close
 

Constructor Detail

SlopeOnePrefsToDiffsReducer

public SlopeOnePrefsToDiffsReducer()
Method Detail

reduce

public void reduce(org.apache.hadoop.io.LongWritable key,
                   java.util.Iterator<ItemPrefWritable> values,
                   org.apache.hadoop.mapred.OutputCollector<ItemItemWritable,org.apache.hadoop.io.FloatWritable> output,
                   org.apache.hadoop.mapred.Reporter reporter)
            throws java.io.IOException
Specified by:
reduce in interface org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.LongWritable,ItemPrefWritable,ItemItemWritable,org.apache.hadoop.io.FloatWritable>
Throws:
java.io.IOException


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