Module org.apache.lucene.queries

Package org.apache.lucene.queries.spans

Class SpanNearQuery.SpanNearWeight

java.lang.Object

org.apache.lucene.search.Weight

org.apache.lucene.queries.spans.SpanWeight

org.apache.lucene.queries.spans.SpanNearQuery.SpanNearWeight

All Implemented Interfaces:

SegmentCacheable

Enclosing class:

SpanNearQuery

public class SpanNearQuery.SpanNearWeight
extends SpanWeight

Creates SpanNearQuery scorer instances

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.queries.spans.SpanWeight

SpanWeight.Postings

Nested classes/interfaces inherited from class org.apache.lucene.search.Weight

Weight.DefaultBulkScorer, Weight.DefaultScorerSupplier

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final List<SpanWeight>	subWeights

Fields inherited from class org.apache.lucene.queries.spans.SpanWeight

field, similarity, simScorer

Fields inherited from class org.apache.lucene.search.Weight

parentQuery

Constructor Summary

Constructors

Constructor	Description
SpanNearWeight(List<SpanWeight> subWeights, IndexSearcher searcher, Map<Term,TermStates> terms, float boost)

Method Summary

Modifier and Type	Method	Description
void	extractTermStates(Map<Term,TermStates> contexts)	Collect all TermStates used by this Weight
Spans	getSpans(LeafReaderContext context, SpanWeight.Postings requiredPostings)	Expert: Return a Spans object iterating over matches from this Weight
boolean	isCacheable(LeafReaderContext ctx)
ScorerSupplier	scorerSupplier(LeafReaderContext context)	Get a ScorerSupplier, which allows knowing the cost of the Scorer before building it.

Methods inherited from class org.apache.lucene.queries.spans.SpanWeight

explain, getSimScorer, matches

Methods inherited from class org.apache.lucene.search.Weight

bulkScorer, count, getQuery, scorer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

subWeights

final List<SpanWeight> subWeights

Constructor Details

SpanNearWeight

public SpanNearWeight(List<SpanWeight> subWeights,
 IndexSearcher searcher,
 Map<Term,TermStates> terms,
 float boost)
               throws IOException

Throws:

IOException

Method Details

extractTermStates

public void extractTermStates(Map<Term,TermStates> contexts)

Description copied from class: SpanWeight

Collect all TermStates used by this Weight

Specified by:

extractTermStates in class SpanWeight

Parameters:

contexts - a map to add the TermStates to

getSpans

public Spans getSpans(LeafReaderContext context,
 SpanWeight.Postings requiredPostings)
               throws IOException

Description copied from class: SpanWeight

Expert: Return a Spans object iterating over matches from this Weight

Specified by:

getSpans in class SpanWeight

Parameters:

context - a LeafReaderContext for this Spans

Returns:

a Spans

Throws:

IOException - on error

isCacheable

public boolean isCacheable(LeafReaderContext ctx)

Returns:

true if the object can be cached against a given leaf

scorerSupplier

public ScorerSupplier scorerSupplier(LeafReaderContext context)
                              throws IOException

Description copied from class: Weight

Get a ScorerSupplier, which allows knowing the cost of the Scorer before building it. A scorer supplier for the same LeafReaderContext instance may be requested multiple times as part of a single search call.

Note: It must return null if the scorer is null.

Overrides:

scorerSupplier in class SpanWeight

Parameters:

context - the leaf reader context

Returns:

a ScorerSupplier providing the scorer, or null if scorer is null

Throws:

IOException - if an IOException occurs

See Also:

• Scorer
• Weight.DefaultScorerSupplier