org.apache.mahout.math.hadoop.similarity

Class VectorDistanceMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>

org.apache.mahout.math.hadoop.similarity.VectorDistanceMapper

public final class VectorDistanceMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>

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
VectorDistanceMapper()

Method Summary

Modifier and Type	Method and Description
protected void	map(org.apache.hadoop.io.WritableComparable<?> key, VectorWritable 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

VectorDistanceMapper

public VectorDistanceMapper()

Method Detail

map

protected void map(org.apache.hadoop.io.WritableComparable<?> key,
                   VectorWritable value,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>

Throws:

IOException

InterruptedException

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.WritableComparable<?>,VectorWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>

Throws:

IOException

InterruptedException