org.apache.mahout.ga.watchmaker
Class EvalMapper

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.mahout.ga.watchmaker.EvalMapper
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,org.apache.hadoop.io.DoubleWritable>

public class EvalMapper
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,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.


Field Summary
static java.lang.String MAHOUT_GA_EVALUATOR
          Parameter used to store the "stringified" evaluator
 
Constructor Summary
EvalMapper()
           
 
Method Summary
 void configure(org.apache.hadoop.mapred.JobConf job)
           
 void map(org.apache.hadoop.io.LongWritable key, org.apache.hadoop.io.Text value, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.DoubleWritable> 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

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

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,org.apache.hadoop.io.DoubleWritable> 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,org.apache.hadoop.io.DoubleWritable>
Throws:
java.io.IOException


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