org.apache.mahout.ga.watchmaker
Class EvalMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.DoubleWritable>
      extended by org.apache.mahout.ga.watchmaker.EvalMapper

public class EvalMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.DoubleWritable>

Generic Mapper class for fitness evaluation. Works with the following : <key, candidate, key, fitness>, where :

key: position of the current candidate in the input file.
candidate: candidate solution to evaluate.
fitness: evaluated fitness for the given candidate.


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Field Summary
static java.lang.String MAHOUT_GA_EVALUATOR
          Parameter used to store the "stringified" evaluator
 
Constructor Summary
EvalMapper()
           
 
Method Summary
 void map(org.apache.hadoop.io.LongWritable key, org.apache.hadoop.io.Text value, org.apache.hadoop.mapreduce.Mapper.Context context)
           
 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
 

Field Detail

MAHOUT_GA_EVALUATOR

public static final java.lang.String MAHOUT_GA_EVALUATOR
Parameter used to store the "stringified" evaluator

See Also:
Constant Field Values
Constructor Detail

EvalMapper

public EvalMapper()
Method Detail

setup

public void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
           throws java.io.IOException,
                  java.lang.InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.DoubleWritable>
Throws:
java.io.IOException
java.lang.InterruptedException

map

public void map(org.apache.hadoop.io.LongWritable key,
                org.apache.hadoop.io.Text value,
                org.apache.hadoop.mapreduce.Mapper.Context context)
         throws java.io.IOException,
                java.lang.InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.DoubleWritable>
Throws:
java.io.IOException
java.lang.InterruptedException


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