java.lang.Object
org.apache.lucene.search.Weight
org.apache.lucene.search.FilterWeight
org.apache.lucene.sandbox.search.QueryProfilerWeight
- All Implemented Interfaces:
SegmentCacheable
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Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.search.Weight
Weight.DefaultBulkScorer, Weight.DefaultScorerSupplier
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Field Summary
FieldsFields inherited from class org.apache.lucene.search.FilterWeight
in
Fields inherited from class org.apache.lucene.search.Weight
parentQuery
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
count
(LeafReaderContext context) Counts the number of live documents that match a givenWeight.parentQuery
in a leaf.boolean
scorerSupplier
(LeafReaderContext context) Get aScorerSupplier
, which allows knowing the cost of theScorer
before building it.Methods inherited from class org.apache.lucene.search.FilterWeight
explain, matches
Methods inherited from class org.apache.lucene.search.Weight
bulkScorer, getQuery, scorer
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Field Details
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profile
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Constructor Details
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QueryProfilerWeight
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Method Details
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count
Description copied from class:Weight
Counts the number of live documents that match a givenWeight.parentQuery
in a leaf.The default implementation returns -1 for every query. This indicates that the count could not be computed in sub-linear time.
Specific query classes should override it to provide other accurate sub-linear implementations (that actually return the count). Look at
MatchAllDocsQuery.createWeight(IndexSearcher, ScoreMode, float)
for an exampleWe use this property of the function to count hits in
IndexSearcher.count(Query)
.- Overrides:
count
in classWeight
- Parameters:
context
- theLeafReaderContext
for which to return the count.- Returns:
- integer count of the number of matches
- Throws:
IOException
- if there is a low-level I/O error
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scorerSupplier
Description copied from class:Weight
Get aScorerSupplier
, which allows knowing the cost of theScorer
before building it. A scorer supplier for the sameLeafReaderContext
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 classFilterWeight
- 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:
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isCacheable
- Specified by:
isCacheable
in interfaceSegmentCacheable
- Overrides:
isCacheable
in classFilterWeight
- Returns:
true
if the object can be cached against a given leaf
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