org.galagosearch.core.scoring
Class DirichletSmoother

java.lang.Object
  org.galagosearch.tupleflow.StandardStep<org.galagosearch.core.types.DocumentLengthWordCount,org.galagosearch.core.types.DocumentWordProbability>
      org.galagosearch.core.scoring.DirichletSmoother

All Implemented Interfaces:

DistributionSmoother, org.galagosearch.tupleflow.Processor<org.galagosearch.core.types.DocumentLengthWordCount>, org.galagosearch.tupleflow.Source<org.galagosearch.core.types.DocumentWordProbability>, org.galagosearch.tupleflow.Step

public class DirichletSmoother
extends org.galagosearch.tupleflow.StandardStep<org.galagosearch.core.types.DocumentLengthWordCount,org.galagosearch.core.types.DocumentWordProbability>
implements DistributionSmoother

Author:

trevor

Field Summary

Fields inherited from class org.galagosearch.tupleflow.StandardStep

processor

Constructor Summary

DirichletSmoother(double mu, java.util.HashMap<java.lang.String,java.lang.Double> backgrounds)

DirichletSmoother(org.galagosearch.tupleflow.TupleFlowParameters parameters)

Method Summary

java.lang.Class<org.galagosearch.core.types.DocumentLengthWordCount>	getInputClass()
java.lang.Class<org.galagosearch.core.types.DocumentWordProbability>	getOutputClass()
void	process(org.galagosearch.core.types.DocumentLengthWordCount object)
double	smooth(double background, int count, int length)
double	smooth(java.lang.String word, int count, int length)
static void	verify(org.galagosearch.tupleflow.TupleFlowParameters parameters, org.galagosearch.tupleflow.execution.ErrorHandler handler)

Methods inherited from class org.galagosearch.tupleflow.StandardStep

close, setProcessor

Methods inherited from class java.lang.Object

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

Constructor Detail

DirichletSmoother

public DirichletSmoother(double mu,
                         java.util.HashMap<java.lang.String,java.lang.Double> backgrounds)

DirichletSmoother

public DirichletSmoother(org.galagosearch.tupleflow.TupleFlowParameters parameters)
                  throws java.io.IOException

Throws:

java.io.IOException

Method Detail

process

public void process(org.galagosearch.core.types.DocumentLengthWordCount object)
             throws java.io.IOException

Specified by:

process in interface org.galagosearch.tupleflow.Processor<org.galagosearch.core.types.DocumentLengthWordCount>

Specified by:

process in class org.galagosearch.tupleflow.StandardStep<org.galagosearch.core.types.DocumentLengthWordCount,org.galagosearch.core.types.DocumentWordProbability>

Throws:

java.io.IOException

smooth

public double smooth(double background,
                     int count,
                     int length)

Specified by:

smooth in interface DistributionSmoother

smooth

public double smooth(java.lang.String word,
                     int count,
                     int length)

Specified by:

smooth in interface DistributionSmoother

getInputClass

public java.lang.Class<org.galagosearch.core.types.DocumentLengthWordCount> getInputClass()

getOutputClass

public java.lang.Class<org.galagosearch.core.types.DocumentWordProbability> getOutputClass()

verify

public static void verify(org.galagosearch.tupleflow.TupleFlowParameters parameters,
                          org.galagosearch.tupleflow.execution.ErrorHandler handler)