org.openimaj.hadoop.tools.fastkmeans

Class AKMeans.Map

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Text,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.BytesWritable>

org.openimaj.hadoop.tools.fastkmeans.AKMeans.Map

Enclosing class:

AKMeans

public static class AKMeans.Map
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Text,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.BytesWritable>

the map for approximate kmeans. Uses the ByteKMeans under the hood. For each feature assign the feature to a centroid and emit with centroid as key.

Author:

Sina Samangooei (ss@ecs.soton.ac.uk)

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
Map()

Method Summary

Modifier and Type	Method and Description
protected static void	loadCluster(org.apache.hadoop.mapreduce.Mapper.Context context)
void	map(org.apache.hadoop.io.Text key, org.apache.hadoop.io.BytesWritable value, 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

Map

public Map()

Method Detail

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.Text,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.BytesWritable>

Throws:

IOException

InterruptedException

loadCluster

protected static void loadCluster(org.apache.hadoop.mapreduce.Mapper.Context context)
                           throws IOException

Throws:

IOException

map

public void map(org.apache.hadoop.io.Text key,
                org.apache.hadoop.io.BytesWritable value,
                org.apache.hadoop.mapreduce.Mapper.Context context)
         throws IOException,
                InterruptedException

Overrides:

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

Throws:

IOException

InterruptedException