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, or null if the field does not exist (has no indexed terms) This can be overridden for example, to return a field's statistics across a distributed collection.

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 / docCount
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	ClassicSimilarity.idfExplain(CollectionStatistics collectionStats, TermStatistics termStats)
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.
Similarity.SimScorer	BM25Similarity.scorer(float boost, CollectionStatistics collectionStats, TermStatistics... termStats)
Similarity.SimScorer	BooleanSimilarity.scorer(float boost, CollectionStatistics collectionStats, TermStatistics... termStats)
Similarity.SimScorer	MultiSimilarity.scorer(float boost, CollectionStatistics collectionStats, TermStatistics... termStats)
Similarity.SimScorer	PerFieldSimilarityWrapper.scorer(float boost, CollectionStatistics collectionStats, TermStatistics... termStats)
abstract Similarity.SimScorer	Similarity.scorer(float boost, CollectionStatistics collectionStats, TermStatistics... termStats)	Compute any collection-level weight (e.g.
Similarity.SimScorer	SimilarityBase.scorer(float boost, CollectionStatistics collectionStats, TermStatistics... termStats)
Similarity.SimScorer	TFIDFSimilarity.scorer(float boost, CollectionStatistics collectionStats, TermStatistics... termStats)