## Uses of Class
org.apache.lucene.search.similarities.Similarity

Packages that use Similarity
org.apache.lucene.index: Code to maintain and access indices.
org.apache.lucene.search: Code to search indices.
org.apache.lucene.search.payloads: The payloads package provides Query mechanisms for finding and using payloads.
org.apache.lucene.search.similarities: This package contains the various ranking models that can be used in Lucene.
org.apache.lucene.search.spans: The calculus of spans.

Uses of Similarity in org.apache.lucene.index

Fields in org.apache.lucene.index declared as Similarity
`protected Similarity` `LiveIndexWriterConfig.similarity` `Similarity` to use when encoding norms.

Methods in org.apache.lucene.index that return Similarity
`Similarity` `IndexWriterConfig.getSimilarity()`
`Similarity` `LiveIndexWriterConfig.getSimilarity()` Expert: returns the `Similarity` implementation used by this `IndexWriter`.

Methods in org.apache.lucene.index with parameters of type Similarity
`IndexWriterConfig` `IndexWriterConfig.setSimilarity(Similarity similarity)` Expert: set the `Similarity` implementation used by this IndexWriter.

Uses of Similarity in org.apache.lucene.search

Fields in org.apache.lucene.search declared as Similarity
`protected Similarity` `BooleanQuery.BooleanWeight.similarity` The Similarity implementation.

Methods in org.apache.lucene.search that return Similarity
`static Similarity` `IndexSearcher.getDefaultSimilarity()` Expert: returns a default Similarity instance.
`Similarity` `IndexSearcher.getSimilarity()`

Methods in org.apache.lucene.search with parameters of type Similarity
`void` `IndexSearcher.setSimilarity(Similarity similarity)` Expert: Set the Similarity implementation used by this IndexSearcher.

Uses of Similarity in org.apache.lucene.search.payloads

Methods in org.apache.lucene.search.payloads with parameters of type Similarity
`protected void` `PayloadTermQuery.PayloadTermWeight.PayloadTermSpanScorer.processPayload(Similarity similarity)`

Constructors in org.apache.lucene.search.payloads with parameters of type Similarity
`PayloadNearQuery.PayloadNearSpanScorer(Spans spans, Weight weight, Similarity similarity, Similarity.SloppySimScorer docScorer)`

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

Subclasses of Similarity in org.apache.lucene.search.similarities
`class` `BM25Similarity` BM25 Similarity.
`class` `DefaultSimilarity` Expert: Default scoring implementation.
`class` `DFRSimilarity` Implements the divergence from randomness (DFR) framework introduced in Gianni Amati and Cornelis Joost Van Rijsbergen.
`class` `IBSimilarity` Provides a framework for the family of information-based models, as described in Stéphane Clinchant and Eric Gaussier.
`class` `LMDirichletSimilarity` Bayesian smoothing using Dirichlet priors.
`class` `LMJelinekMercerSimilarity` Language model based on the Jelinek-Mercer smoothing method.
`class` `LMSimilarity` Abstract superclass for language modeling Similarities.
`class` `MultiSimilarity` Implements the CombSUM method for combining evidence from multiple similarity values described in: Joseph A.
`class` `PerFieldSimilarityWrapper` Provides the ability to use a different `Similarity` for different fields.
`class` `SimilarityBase` A subclass of `Similarity` that provides a simplified API for its descendants.
`class` `TFIDFSimilarity` Implementation of `Similarity` with the Vector Space Model.

Fields in org.apache.lucene.search.similarities declared as Similarity
`protected Similarity[]` `MultiSimilarity.sims` the sub-similarities used to create the combined score

Methods in org.apache.lucene.search.similarities that return Similarity
`abstract Similarity` `PerFieldSimilarityWrapper.get(String name)` Returns a `Similarity` for scoring a field.

Constructors in org.apache.lucene.search.similarities with parameters of type Similarity
`MultiSimilarity(Similarity[] sims)` Creates a MultiSimilarity which will sum the scores of the provided `sims`.

Uses of Similarity in org.apache.lucene.search.spans

Fields in org.apache.lucene.search.spans declared as Similarity
`protected Similarity` `SpanWeight.similarity`

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