BM25SimilarityFactory (Solr 7.7.0 API)

java.lang.Object
- org.apache.solr.schema.SimilarityFactory
- - org.apache.solr.search.similarities.BM25SimilarityFactory

```
public class BM25SimilarityFactory
extends SimilarityFactory
```
Factory for BM25Similarity
Parameters:
- k1 (float): Controls non-linear term frequency normalization (saturation). The default is 1.2
- b (float): Controls to what degree document length normalizes tf values. The default is 0.75
Optional settings:
- discountOverlaps (bool): Sets BM25Similarity.setDiscountOverlaps(boolean)
WARNING: This API is experimental and might change in incompatible ways in the next release.

- Field Summary
  - Fields inherited from class org.apache.solr.schema.SimilarityFactory
    CLASS_NAME, params
- Constructor Summary
  
  Constructors
  Constructor Description
  
  BM25SimilarityFactory()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  org.apache.lucene.search.similarities.Similarity getSimilarity()
  
  void init(SolrParams params)
  - Methods inherited from class org.apache.solr.schema.SimilarityFactory
    getClassArg, getNamedPropertyValues, getParams
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BM25SimilarityFactory
```
public BM25SimilarityFactory()
```
- Method Detail
  - init
```
public void init(SolrParams params)
```
    Overrides:
    
    init in class SimilarityFactory
  - getSimilarity
```
public org.apache.lucene.search.similarities.Similarity getSimilarity()
```
    Specified by:
    
    getSimilarity in class SimilarityFactory