lucene::search::DefaultSimilarity Class Reference

Expert: Default scoring implementation. More...

#include <Similarity.h>

Inheritance diagram for lucene::search::DefaultSimilarity:


Public Member Functions
	DefaultSimilarity ()
	~DefaultSimilarity ()
float_t	lengthNorm (const TCHAR *fieldName, int32_t numTerms)
	Implemented as `1/sqrt(numTerms)`.
float_t	queryNorm (float_t sumOfSquaredWeights)
	Implemented as `1/sqrt(sumOfSquaredWeights)`.
float_t	tf (float_t freq)
	Implemented as `sqrt(freq)`.
float_t	sloppyFreq (int32_t distance)
	Implemented as `1 / (distance + 1)`.
float_t	idf (int32_t docFreq, int32_t numDocs)
	Implemented as `log(numDocs/(docFreq+1)) + 1`.
float_t	coord (int32_t overlap, int32_t maxOverlap)
	Implemented as `overlap / maxOverlap`.

Detailed Description

Expert: Default scoring implementation.

lucene::search::DefaultSimilarity::DefaultSimilarity ( )

lucene::search::DefaultSimilarity::~DefaultSimilarity ( )

float_t lucene::search::DefaultSimilarity::lengthNorm	(	const TCHAR *	fieldName,
		int32_t	numTerms
	)			`[virtual]`

Implemented as 1/sqrt(numTerms).

float_t lucene::search::DefaultSimilarity::queryNorm ( float_t sumOfSquaredWeights ) [virtual]

Implemented as 1/sqrt(sumOfSquaredWeights).

float_t lucene::search::DefaultSimilarity::tf ( float_t freq ) [inline, virtual]

Implemented as sqrt(freq).

float_t lucene::search::DefaultSimilarity::sloppyFreq ( int32_t distance ) [virtual]

Implemented as 1 / (distance + 1).

float_t lucene::search::DefaultSimilarity::idf	(	int32_t	docFreq,
		int32_t	numDocs
	)			`[virtual]`

Implemented as log(numDocs/(docFreq+1)) + 1.

float_t lucene::search::DefaultSimilarity::coord	(	int32_t	overlap,
		int32_t	maxOverlap
	)			`[virtual]`

Implemented as overlap / maxOverlap.

The documentation for this class was generated from the following file: