org.apache.lucene.search

Class RandomSimilarityProvider

java.lang.Object

org.apache.lucene.search.similarities.Similarity

org.apache.lucene.search.similarities.PerFieldSimilarityWrapper

org.apache.lucene.search.RandomSimilarityProvider

public class RandomSimilarityProvider
extends PerFieldSimilarityWrapper

Similarity implementation that randomizes Similarity implementations per-field.

The choices are 'sticky', so the selected algorithm is always used for the same field.

Nested Class Summary

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

Similarity.SimScorer, Similarity.SimWeight

Constructor Summary

Constructors

Constructor and Description
RandomSimilarityProvider(Random random)

Method Summary

Methods

Modifier and Type	Method and Description
float	coord(int overlap, int maxOverlap)
Similarity	get(String field)
float	queryNorm(float sumOfSquaredWeights)
String	toString()

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

computeNorm, computeWeight, simScorer

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomSimilarityProvider

public RandomSimilarityProvider(Random random)

Method Detail

coord

public float coord(int overlap,
          int maxOverlap)

Overrides:

coord in class Similarity

queryNorm

public float queryNorm(float sumOfSquaredWeights)

Overrides:

queryNorm in class Similarity

get

public Similarity get(String field)

Specified by:

get in class PerFieldSimilarityWrapper

toString

public String toString()

Overrides:

toString in class Object