core/org.gnit.lucenekmp.search.similarities/BooleanSimilarity

BooleanSimilarity

Simple similarity that gives terms a score that is equal to their query boost. This similarity is typically used with disabled norms since neither document statistics nor index statistics are used for scoring. That said, if norms are enabled, they will be computed the same way as [ ] and BM25Similarity with SimilarityBase.getDiscountOverlaps so that the Similarity can be changed after the index has been created.

Constructors

BooleanSimilarity

constructor()

Properties

discountOverlaps

val discountOverlaps: Boolean

True if overlap tokens (tokens with a position of increment of zero) are discounted from the document's length.

Functions

computeNorm

open fun computeNorm(state: FieldInvertState): Long

Computes the normalization value for a field at index-time.

scorer

open override fun scorer(boost: Float, collectionStats: CollectionStatistics, vararg termStats: TermStatistics): Similarity.SimScorer

Compute any collection-level weight (e.g. IDF, average document length, etc) needed for scoring a query.