Class BasicModel
java.lang.Object
org.apache.lucene.search.similarities.BasicModel
- Direct Known Subclasses:
BasicModelBE
,BasicModelD
,BasicModelG
,BasicModelIF
,BasicModelIn
,BasicModelIne
,BasicModelP
This class acts as the base class for the specific basic model
implementations in the DFR framework. Basic models compute the
informative content Inf1 = -log2Prob1
.
- See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionexplain
(BasicStats stats, float tfn) Returns an explanation for the score.abstract float
score
(BasicStats stats, float tfn) Returns the informative content score.abstract String
toString()
Subclasses must override this method to return the code of the basic model formula.
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Constructor Details
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BasicModel
public BasicModel()Sole constructor. (For invocation by subclass constructors, typically implicit.)
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Method Details
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score
Returns the informative content score. -
explain
Returns an explanation for the score.Most basic models use the number of documents and the total term frequency to compute Inf1. This method provides a generic explanation for such models. Subclasses that use other statistics must override this method.
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toString
Subclasses must override this method to return the code of the basic model formula. Refer to the original paper for the list.
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