org.apache.mahout.classifier.df.mapreduce

Class MapredMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

org.apache.mahout.classifier.df.mapreduce.MapredMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

Direct Known Subclasses:

InMemMapper, Step1Mapper

public class MapredMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
extends org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

Base class for Mapred mappers. Loads common parameters from the job

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
MapredMapper()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	configure(boolean noOutput, TreeBuilder treeBuilder, Dataset dataset) Useful for testing
protected Dataset	getDataset()
protected TreeBuilder	getTreeBuilder()
protected boolean	isOutput()
protected void	setup(org.apache.hadoop.mapreduce.Mapper.Context context)

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

cleanup, map, run

Methods inherited from class java.lang.Object

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

Constructor Detail

MapredMapper

public MapredMapper()

Method Detail

isOutput

protected boolean isOutput()

Returns:

whether the mapper does estimate and output predictions

getTreeBuilder

protected TreeBuilder getTreeBuilder()

getDataset

protected Dataset getDataset()

setup

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

Overrides:

setup in class org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

Throws:

IOException

InterruptedException

configure

protected void configure(boolean noOutput,
             TreeBuilder treeBuilder,
             Dataset dataset)

Useful for testing