Uses of Class
org.apache.lucene.search.CollectionStatistics
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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. -
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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)
ReturnsCollectionStatistics
for a field, ornull
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 assumTotalTermFreq / 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 inBasicStats
instats
.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)
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