org.apache.mahout.clustering.canopy
Class ClusterMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>
      extended by org.apache.mahout.clustering.canopy.ClusterMapper

public class ClusterMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Constructor Summary
ClusterMapper()
           
 
Method Summary
 boolean canopyCovers(Canopy canopy, Vector point)
           
 void config(java.util.Collection<Canopy> canopies)
          Configure the mapper by providing its canopies.
protected  void map(org.apache.hadoop.io.WritableComparable<?> key, VectorWritable point, org.apache.hadoop.mapreduce.Mapper.Context context)
           
protected  void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
           
 
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

ClusterMapper

public ClusterMapper()
Method Detail

map

protected void map(org.apache.hadoop.io.WritableComparable<?> key,
                   VectorWritable point,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws java.io.IOException,
                   java.lang.InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>
Throws:
java.io.IOException
java.lang.InterruptedException

config

public void config(java.util.Collection<Canopy> canopies)
Configure the mapper by providing its canopies. Used by unit tests.

Parameters:
canopies - a List

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
              throws java.io.IOException,
                     java.lang.InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>
Throws:
java.io.IOException
java.lang.InterruptedException

canopyCovers

public boolean canopyCovers(Canopy canopy,
                            Vector point)


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