org.sindice.siren.similarity

Class SirenSimilarity

java.lang.Object

org.apache.lucene.search.similarities.Similarity

org.apache.lucene.search.similarities.TFIDFSimilarity

org.apache.lucene.search.similarities.DefaultSimilarity

org.sindice.siren.similarity.SirenSimilarity

public class SirenSimilarity
extends org.apache.lucene.search.similarities.DefaultSimilarity

Implements the BM25 saturation function for the term frequency.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.similarities.Similarity

org.apache.lucene.search.similarities.Similarity.ExactSimScorer, org.apache.lucene.search.similarities.Similarity.SimWeight, org.apache.lucene.search.similarities.Similarity.SloppySimScorer

Field Summary

Fields inherited from class org.apache.lucene.search.similarities.DefaultSimilarity

discountOverlaps

Constructor Summary

Constructors

Constructor and Description
SirenSimilarity()

Method Summary

Methods

Modifier and Type	Method and Description
float	tf(float freq)

Methods inherited from class org.apache.lucene.search.similarities.DefaultSimilarity

computeNorm, coord, getDiscountOverlaps, idf, queryNorm, scorePayload, setDiscountOverlaps, sloppyFreq, toString

Methods inherited from class org.apache.lucene.search.similarities.TFIDFSimilarity

computeWeight, decodeNormValue, encodeNormValue, exactSimScorer, idfExplain, idfExplain, sloppySimScorer, tf

Methods inherited from class java.lang.Object

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

Constructor Detail

SirenSimilarity

public SirenSimilarity()

Method Detail

tf

public float tf(float freq)

Overrides:

tf in class org.apache.lucene.search.similarities.DefaultSimilarity