org.apache.mahout.clustering.evaluation

Class RepresentativePointsMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,WeightedVectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>

org.apache.mahout.clustering.evaluation.RepresentativePointsMapper

public class RepresentativePointsMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,WeightedVectorWritable,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

Constructors

Constructor and Description
RepresentativePointsMapper()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
void	configure(Map<Integer,List<VectorWritable>> referencePoints, DistanceMeasure measure)
static Map<Integer,List<VectorWritable>>	getRepresentativePoints(org.apache.hadoop.conf.Configuration conf)
static Map<Integer,List<VectorWritable>>	getRepresentativePoints(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path statePath)
protected void	map(org.apache.hadoop.io.IntWritable clusterId, WeightedVectorWritable point, org.apache.hadoop.mapreduce.Mapper.Context context)
static void	mapPoint(org.apache.hadoop.io.IntWritable clusterId, WeightedVectorWritable point, DistanceMeasure measure, Map<Integer,List<VectorWritable>> representativePoints, Map<Integer,WeightedVectorWritable> mostDistantPoints)
protected void	setup(org.apache.hadoop.mapreduce.Mapper.Context context)

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

run

Methods inherited from class java.lang.Object

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

Constructor Detail

RepresentativePointsMapper

public RepresentativePointsMapper()

Method Detail

cleanup

protected void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
                throws IOException,
                       InterruptedException

Overrides:

cleanup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,WeightedVectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>

Throws:

IOException

InterruptedException

map

protected void map(org.apache.hadoop.io.IntWritable clusterId,
       WeightedVectorWritable point,
       org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,WeightedVectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>

Throws:

IOException

InterruptedException

mapPoint

public static void mapPoint(org.apache.hadoop.io.IntWritable clusterId,
            WeightedVectorWritable point,
            DistanceMeasure measure,
            Map<Integer,List<VectorWritable>> representativePoints,
            Map<Integer,WeightedVectorWritable> mostDistantPoints)

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
              throws IOException,
                     InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,WeightedVectorWritable,org.apache.hadoop.io.IntWritable,WeightedVectorWritable>

Throws:

IOException

InterruptedException

configure

public void configure(Map<Integer,List<VectorWritable>> referencePoints,
             DistanceMeasure measure)

getRepresentativePoints

public static Map<Integer,List<VectorWritable>> getRepresentativePoints(org.apache.hadoop.conf.Configuration conf)

getRepresentativePoints

public static Map<Integer,List<VectorWritable>> getRepresentativePoints(org.apache.hadoop.conf.Configuration conf,
                                                        org.apache.hadoop.fs.Path statePath)