ConstantScoreWeight (Lucene 7.7.0 API)

java.lang.Object
- org.apache.lucene.search.Weight
- - org.apache.lucene.search.ConstantScoreWeight

All Implemented Interfaces:

SegmentCacheable
```
public abstract class ConstantScoreWeight
extends Weight
```
A Weight that has a constant score equal to the boost of the wrapped query. This is typically useful when building queries which do not produce meaningful scores and are mostly useful for filtering.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.lucene.search.Weight
  Weight.DefaultBulkScorer

Field Summary
- Fields inherited from class org.apache.lucene.search.Weight
  parentQuery

Constructor Summary

Constructors
Modifier Constructor Description

protected ConstantScoreWeight(Query query, float score)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Explanation`	`explain(LeafReaderContext context, int doc)`	An explanation of the score computation for the named document.
`void`	`extractTerms(Set<Term> terms)`	Expert: adds all terms occurring in this query to the terms set.
`protected float`	`score()`	Return the score produced by this `Weight`.

Methods inherited from class org.apache.lucene.search.Weight
bulkScorer, getQuery, matches, scorer, scorerSupplier

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

Methods inherited from interface org.apache.lucene.search.SegmentCacheable
isCacheable

- Constructor Detail
  - ConstantScoreWeight
```
protected ConstantScoreWeight(Query query,
                              float score)
```
- Method Detail
  - extractTerms
```
public void extractTerms(Set<Term> terms)
```
    Description copied from class: Weight
    
    Expert: adds all terms occurring in this query to the terms set. If the Weight was created with needsScores == true then this method will only extract terms which are used for scoring, otherwise it will extract all terms which are used for matching.
    
    Specified by:
    
    extractTerms in class Weight
  - score
```
protected final float score()
```
    Return the score produced by this Weight.
  - explain
```
public Explanation explain(LeafReaderContext context,
                           int doc)
                    throws IOException
```
    Description copied from class: Weight
    
    An explanation of the score computation for the named document.
    
    Specified by:
    
    explain in class Weight
    
    Parameters:
    
    context - the readers context to create the Explanation for.
    
    doc - the document's id relative to the given context's reader
    
    Returns:
    
    an Explanation for the score
    
    Throws:
    
    IOException - if an IOException occurs