org.apache.lucene.search.similarities
Class AfterEffectB

java.lang.Object
  org.apache.lucene.search.similarities.AfterEffect
      org.apache.lucene.search.similarities.AfterEffectB

public class AfterEffectB
extends AfterEffect

Model of the information gain based on the ratio of two Bernoulli processes.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

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

AfterEffect.NoAfterEffect

Constructor Summary

AfterEffectB()
Sole constructor: parameter-free

Method Summary

Explanation	explain(BasicStats stats, float tfn) Returns an explanation for the score.
float	score(BasicStats stats, float tfn) Returns the aftereffect score.
String	toString() Subclasses must override this method to return the code of the after effect formula.

Methods inherited from class java.lang.Object

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

Constructor Detail

AfterEffectB

public AfterEffectB()

Sole constructor: parameter-free

Method Detail

score

public final float score(BasicStats stats,
                         float tfn)

Description copied from class: AfterEffect

Returns the aftereffect score.

Specified by:

score in class AfterEffect

explain

public final Explanation explain(BasicStats stats,
                                 float tfn)

Description copied from class: AfterEffect

Returns an explanation for the score.

Specified by:

explain in class AfterEffect

toString

public String toString()

Description copied from class: AfterEffect

Subclasses must override this method to return the code of the after effect formula. Refer to the original paper for the list.

Specified by:

toString in class AfterEffect