SimilarityFactory (Solr 9.0.0 core API)

java.lang.Object
- org.apache.solr.schema.SimilarityFactory

Direct Known Subclasses:

BM25SimilarityFactory, BooleanSimilarityFactory, ClassicSimilarityFactory, DFISimilarityFactory, DFRSimilarityFactory, IBSimilarityFactory, LMDirichletSimilarityFactory, LMJelinekMercerSimilarityFactory, SchemaSimilarityFactory
```
public abstract class SimilarityFactory
extends Object
```
A factory interface for configuring a Similarity in the Solr schema.xml.
Subclasses of SimilarityFactory which are SchemaAware must take responsibility for either consulting the similarities configured on individual field types, or generating appropriate error/warning messages if field type specific similarities exist but are being ignored. The IndexSchema will provide such error checking if a non-SchemaAware instance of SimilarityFactory is used.

See Also:

FieldType.getSimilarity()

Field Summary

Fields
Modifier and Type Field Description

static String CLASS_NAME

protected SolrParams params

Constructor Summary

Constructors
Constructor Description

SimilarityFactory()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getClassArg()`
`SimpleOrderedMap<Object>`	`getNamedPropertyValues()`	Returns a serializable description of this similarity(factory)
`SolrParams`	`getParams()`
`abstract org.apache.lucene.search.similarities.Similarity`	`getSimilarity()`
`void`	`init(SolrParams params)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - CLASS_NAME
```
public static final String CLASS_NAME
```
    See Also:
    
    Constant Field Values
  - params
```
protected SolrParams params
```
- Constructor Detail
  - SimilarityFactory
```
public SimilarityFactory()
```
- Method Detail
  - init
```
public void init(SolrParams params)
```
  - getParams
```
public SolrParams getParams()
```
  - getSimilarity
```
public abstract org.apache.lucene.search.similarities.Similarity getSimilarity()
```
  - getNamedPropertyValues
```
public SimpleOrderedMap<Object> getNamedPropertyValues()
```
    Returns a serializable description of this similarity(factory)
  - getClassArg
```
public String getClassArg()
```
    Returns:
    
    the string used to specify the concrete class name in a serialized representation: the class arg. If the concrete class name was not specified via a class arg, returns getClass().getName(), unless this class is the anonymous similarity wrapper produced in IndexSchema, in which case the getSimilarity().getClass().getName() is returned.