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

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
      extended by 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
MapredMapper()
           
 
Method Summary
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



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