org.apache.mahout.math.hadoop.similarity
Class RowSimilarityJob.RowWeightMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,VectorWritable,VarIntWritable,org.apache.mahout.math.hadoop.similarity.WeightedOccurrence>
      extended by org.apache.mahout.math.hadoop.similarity.RowSimilarityJob.RowWeightMapper
Enclosing class:
RowSimilarityJob

public static class RowSimilarityJob.RowWeightMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,VectorWritable,VarIntWritable,org.apache.mahout.math.hadoop.similarity.WeightedOccurrence>

applies DistributedVectorSimilarity.weight(Vector) to each row of the input matrix


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Constructor Summary
RowSimilarityJob.RowWeightMapper()
           
 
Method Summary
protected  void map(org.apache.hadoop.io.IntWritable row, VectorWritable vectorWritable, org.apache.hadoop.mapreduce.Mapper.Context ctx)
           
protected  void setup(org.apache.hadoop.mapreduce.Mapper.Context ctx)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Mapper
cleanup, run
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RowSimilarityJob.RowWeightMapper

public RowSimilarityJob.RowWeightMapper()
Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context ctx)
              throws java.io.IOException,
                     java.lang.InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,VectorWritable,VarIntWritable,org.apache.mahout.math.hadoop.similarity.WeightedOccurrence>
Throws:
java.io.IOException
java.lang.InterruptedException

map

protected void map(org.apache.hadoop.io.IntWritable row,
                   VectorWritable vectorWritable,
                   org.apache.hadoop.mapreduce.Mapper.Context ctx)
            throws java.io.IOException,
                   java.lang.InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,VectorWritable,VarIntWritable,org.apache.mahout.math.hadoop.similarity.WeightedOccurrence>
Throws:
java.io.IOException
java.lang.InterruptedException


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