Uses of Class
org.apache.lucene.search.CollectionStatistics

Packages that use CollectionStatistics

Package	Description
org.apache.lucene.search	Code to search indices.
org.apache.lucene.search.similarities	This package contains the various ranking models that can be used in Lucene.

Uses of CollectionStatistics in org.apache.lucene.search

Methods in org.apache.lucene.search that return CollectionStatistics

Modifier and Type	Method	Description
CollectionStatistics	IndexSearcher.collectionStatistics(String field)	Returns CollectionStatistics for a field.

Uses of CollectionStatistics in org.apache.lucene.search.similarities

Methods in org.apache.lucene.search.similarities with parameters of type CollectionStatistics

Modifier and Type	Method	Description
protected float	BM25Similarity.avgFieldLength(CollectionStatistics collectionStats)	The default implementation computes the average as sumTotalTermFreq / maxDoc, or returns 1 if the index does not store sumTotalTermFreq (Lucene 3.x indexes or any field that omits frequency information).
Similarity.SimWeight	BM25Similarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)
Similarity.SimWeight	MultiSimilarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)
Similarity.SimWeight	PerFieldSimilarityWrapper.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)
abstract Similarity.SimWeight	Similarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)	Compute any collection-level weight (e.g.
Similarity.SimWeight	SimilarityBase.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)
Similarity.SimWeight	TFIDFSimilarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)
protected void	LMSimilarity.fillBasicStats(BasicStats stats, CollectionStatistics collectionStats, TermStatistics termStats)	Computes the collection probability of the current term in addition to the usual statistics.
protected void	SimilarityBase.fillBasicStats(BasicStats stats, CollectionStatistics collectionStats, TermStatistics termStats)	Fills all member fields defined in BasicStats in stats.
Explanation	BM25Similarity.idfExplain(CollectionStatistics collectionStats, TermStatistics termStats)	Computes a score factor for a simple term and returns an explanation for that score factor.
Explanation	BM25Similarity.idfExplain(CollectionStatistics collectionStats, TermStatistics[] termStats)	Computes a score factor for a phrase.
Explanation	TFIDFSimilarity.idfExplain(CollectionStatistics collectionStats, TermStatistics termStats)	Computes a score factor for a simple term and returns an explanation for that score factor.
Explanation	TFIDFSimilarity.idfExplain(CollectionStatistics collectionStats, TermStatistics[] termStats)	Computes a score factor for a phrase.