org.apache.mahout.utils.vectors.text.term
Class TermDocumentCountReducer

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.mahout.utils.vectors.text.term.TermDocumentCountReducer
All Implemented Interfaces:
java.io.Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable>

public class TermDocumentCountReducer
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable>

Can also be used as a local Combiner. This accumulates all the features and the weights and sums them up.


Constructor Summary
TermDocumentCountReducer()
           
 
Method Summary
 void reduce(org.apache.hadoop.io.IntWritable key, java.util.Iterator<org.apache.hadoop.io.LongWritable> values, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable> 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

TermDocumentCountReducer

public TermDocumentCountReducer()
Method Detail

reduce

public void reduce(org.apache.hadoop.io.IntWritable key,
                   java.util.Iterator<org.apache.hadoop.io.LongWritable> values,
                   org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable> 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.IntWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable>
Throws:
java.io.IOException


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