org.aksw.hawk.ranking

Class FeatureBasedRanker

java.lang.Object

org.aksw.hawk.ranking.FeatureBasedRanker

All Implemented Interfaces:

Ranking

public class FeatureBasedRanker
extends Object
implements Ranking

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FeatureBasedRanker.Feature

Field Summary

Fields

Modifier and Type	Field and Description
private FeatureBasedRankerDB	db
private Collection<FeatureBasedRanker.Feature>	features
private static org.slf4j.Logger	log
private Map<String,Double>	vec

Constructor Summary

Constructors

Constructor and Description
FeatureBasedRanker()

Method Summary

Modifier and Type	Method and Description
private void	addOneToMapAtKey(Map<String,Double> map, String key)
private Map<String,Double>	calculateRanking(SPARQLQuery q)
private double	cosinus(Map<String,Double> calculateRanking, Map<String,Double> goldVector)
void	learn(IQuestion q, Set<SPARQLQuery> queries)
private double	numberOfConstraints(SPARQLQuery query)
private Double	numberOfTermsInTextQuery(SPARQLQuery q)
private Double	numberOfTypes(SPARQLQuery q)
List<Answer>	rank(List<Answer> answers, HAWKQuestion q)
void	setFeatures(Collection<FeatureBasedRanker.Feature> features)
void	train()
private Map<String,Double>	usedPattern(SPARQLQuery q)
private Map<String,Double>	usedPredicates(SPARQLQuery q)

Methods inherited from class java.lang.Object

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

Field Detail

log

private static org.slf4j.Logger log

db

private FeatureBasedRankerDB db

vec

private Map<String,Double> vec

features

private Collection<FeatureBasedRanker.Feature> features

Constructor Detail

FeatureBasedRanker

public FeatureBasedRanker()

Method Detail

learn

public void learn(IQuestion q,
                  Set<SPARQLQuery> queries)

rank

public List<Answer> rank(List<Answer> answers,
                         HAWKQuestion q)

Specified by:

rank in interface Ranking

setFeatures

public void setFeatures(Collection<FeatureBasedRanker.Feature> features)

Parameters:

features - the features to set

train

public void train()

addOneToMapAtKey

private void addOneToMapAtKey(Map<String,Double> map,
                              String key)

calculateRanking

private Map<String,Double> calculateRanking(SPARQLQuery q)

cosinus

private double cosinus(Map<String,Double> calculateRanking,
                       Map<String,Double> goldVector)

numberOfConstraints

private double numberOfConstraints(SPARQLQuery query)

numberOfTermsInTextQuery

private Double numberOfTermsInTextQuery(SPARQLQuery q)

numberOfTypes

private Double numberOfTypes(SPARQLQuery q)

usedPattern

private Map<String,Double> usedPattern(SPARQLQuery q)

usedPredicates

private Map<String,Double> usedPredicates(SPARQLQuery q)