net.sf.eos.lucene
Class NormedLengthSimilarity

java.lang.Object
  org.apache.lucene.search.Similarity
      org.apache.lucene.search.DefaultSimilarity
          net.sf.eos.lucene.NormedLengthSimilarity

All Implemented Interfaces:

Serializable

public class NormedLengthSimilarity
extends org.apache.lucene.search.DefaultSimilarity

Normalize the length for lengthNorm(String, int) to 1.0.

Author:

Sascha Kohlmann

See Also:

Serialized Form

Constructor Summary

NormedLengthSimilarity()

Method Summary

float	coord(int overlap, int maxOverlap)
float	idf(int docFreq, int numDocs)
float	lengthNorm(String fieldName, int numTerms)
float	queryNorm(float sumOfSquaredWeights)
float	sloppyFreq(int distance)
float	tf(float freq)

Methods inherited from class org.apache.lucene.search.Similarity

decodeNorm, encodeNorm, getDefault, getNormDecoder, idf, idf, scorePayload, setDefault, tf

Methods inherited from class java.lang.Object

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

Constructor Detail

NormedLengthSimilarity

public NormedLengthSimilarity()

Method Detail

lengthNorm

public float lengthNorm(String fieldName,
                        int numTerms)

Overrides:

lengthNorm in class org.apache.lucene.search.DefaultSimilarity

queryNorm

public float queryNorm(float sumOfSquaredWeights)

Overrides:

queryNorm in class org.apache.lucene.search.DefaultSimilarity

tf

public float tf(float freq)

Overrides:

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

sloppyFreq

public float sloppyFreq(int distance)

Overrides:

sloppyFreq in class org.apache.lucene.search.DefaultSimilarity

idf

public float idf(int docFreq,
                 int numDocs)

Overrides:

idf in class org.apache.lucene.search.DefaultSimilarity

coord

public float coord(int overlap,
                   int maxOverlap)

Overrides:

coord in class org.apache.lucene.search.DefaultSimilarity