org.apache.mahout.ga.watchmaker.cd.hadoop
Class CDMapper

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.mahout.ga.watchmaker.cd.hadoop.CDMapper
All Implemented Interfaces:
java.io.Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,CDFitness>

public class CDMapper
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,CDFitness>

Hadoop Mapper. Evaluate all the rules with the input data line.


Field Summary
static java.lang.String CLASSDISCOVERY_DATASET
           
static java.lang.String CLASSDISCOVERY_RULES
           
static java.lang.String CLASSDISCOVERY_TARGET_LABEL
           
 
Constructor Summary
CDMapper()
           
 
Method Summary
 void configure(org.apache.hadoop.mapred.JobConf job)
           
static CDFitness evaluate(int target, int prediction, int label)
          Evaluate a given prediction.
 void map(org.apache.hadoop.io.LongWritable key, org.apache.hadoop.io.Text value, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.LongWritable,CDFitness> output, org.apache.hadoop.mapred.Reporter reporter)
           
 
Methods inherited from class org.apache.hadoop.mapred.MapReduceBase
close
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface java.io.Closeable
close
 

Field Detail

CLASSDISCOVERY_RULES

public static final java.lang.String CLASSDISCOVERY_RULES
See Also:
Constant Field Values

CLASSDISCOVERY_DATASET

public static final java.lang.String CLASSDISCOVERY_DATASET
See Also:
Constant Field Values

CLASSDISCOVERY_TARGET_LABEL

public static final java.lang.String CLASSDISCOVERY_TARGET_LABEL
See Also:
Constant Field Values
Constructor Detail

CDMapper

public CDMapper()
Method Detail

configure

public void configure(org.apache.hadoop.mapred.JobConf job)
Specified by:
configure in interface org.apache.hadoop.mapred.JobConfigurable
Overrides:
configure in class org.apache.hadoop.mapred.MapReduceBase

map

public void map(org.apache.hadoop.io.LongWritable key,
                org.apache.hadoop.io.Text value,
                org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.LongWritable,CDFitness> output,
                org.apache.hadoop.mapred.Reporter reporter)
         throws java.io.IOException
Specified by:
map in interface org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,CDFitness>
Throws:
java.io.IOException

evaluate

public static CDFitness evaluate(int target,
                                 int prediction,
                                 int label)
Evaluate a given prediction.

Parameters:
target - expected label
prediction -
label - actual label


Copyright © 2008-2010 The Apache Software Foundation. All Rights Reserved.