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

Packages that use Similarity

Package	Description
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

Modifier and Type	Field	Description
protected Similarity	LiveIndexWriterConfig.similarity	Similarity to use when encoding norms.

Methods in org.apache.lucene.index that return Similarity

Modifier and Type	Method	Description
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

Modifier and Type	Method	Description
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

Modifier and Type	Field	Description
protected Similarity	BooleanQuery.BooleanWeight.similarity	The Similarity implementation.

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

Modifier and Type	Method	Description
static Similarity	IndexSearcher.getDefaultSimilarity()	Expert: returns a default Similarity instance.
Similarity	IndexSearcher.getSimilarity()

Methods in org.apache.lucene.search with parameters of type Similarity

Modifier and Type	Method	Description
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

Modifier and Type	Method	Description
protected void	PayloadTermQuery.PayloadTermWeight.PayloadTermSpanScorer.processPayload(Similarity similarity)

Constructors in org.apache.lucene.search.payloads with parameters of type Similarity

Constructor	Description
PayloadNearSpanScorer(Spans spans, Weight weight, Similarity similarity, Similarity.SimScorer docScorer)

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

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

Modifier and Type	Class	Description
class	BM25Similarity	BM25 Similarity.
class	DefaultSimilarity	Expert: Default scoring implementation which encodes norm values as a single byte before being stored.
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

Modifier and Type	Field	Description
protected Similarity[]	MultiSimilarity.sims	the sub-similarities used to create the combined score

Methods in org.apache.lucene.search.similarities that return Similarity

Modifier and Type	Method	Description
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

Constructor	Description
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

Modifier and Type	Field	Description
protected Similarity	SpanWeight.similarity