Package org.apache.lucene.search
Class DisjunctionMaxQuery.DisjunctionMaxWeight
- java.lang.Object
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- org.apache.lucene.search.Weight
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- org.apache.lucene.search.DisjunctionMaxQuery.DisjunctionMaxWeight
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- All Implemented Interfaces:
SegmentCacheable
- Enclosing class:
- DisjunctionMaxQuery
protected class DisjunctionMaxQuery.DisjunctionMaxWeight extends Weight
Expert: the Weight for DisjunctionMaxQuery, used to normalize, score and explain these queries.NOTE: this API and implementation is subject to change suddenly in the next release.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.lucene.search.Weight
Weight.DefaultBulkScorer
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Field Summary
Fields Modifier and Type Field Description protected ArrayList<Weight>weightsThe Weights for our subqueries, in 1-1 correspondence with disjuncts-
Fields inherited from class org.apache.lucene.search.Weight
parentQuery
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Constructor Summary
Constructors Constructor Description DisjunctionMaxWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)Construct the Weight for this Query searched by searcher.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Explanationexplain(LeafReaderContext context, int doc)Explain the score we computed for docbooleanisCacheable(LeafReaderContext ctx)Matchesmatches(LeafReaderContext context, int doc)ReturnsMatchesfor a specific document, ornullif the document does not match the parent queryScorerscorer(LeafReaderContext context)Returns aScorerwhich can iterate in order over all matching documents and assign them a score.ScorerSupplierscorerSupplier(LeafReaderContext context)Optional method.-
Methods inherited from class org.apache.lucene.search.Weight
bulkScorer, count, getQuery
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Constructor Detail
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DisjunctionMaxWeight
public DisjunctionMaxWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException
Construct the Weight for this Query searched by searcher. Recursively construct subquery weights.- Throws:
IOException
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Method Detail
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matches
public Matches matches(LeafReaderContext context, int doc) throws IOException
Description copied from class:WeightReturnsMatchesfor a specific document, ornullif the document does not match the parent queryA query match that contains no position information (for example, a Point or DocValues query) will return
MatchesUtils.MATCH_WITH_NO_TERMS- Overrides:
matchesin classWeight- Parameters:
context- the reader's context to create theMatchesfordoc- the document's id relative to the given context's reader- Throws:
IOException
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scorerSupplier
public ScorerSupplier scorerSupplier(LeafReaderContext context) throws IOException
Description copied from class:WeightOptional method. Get aScorerSupplier, which allows to know the cost of theScorerbefore building it. The default implementation callsWeight.scorer(org.apache.lucene.index.LeafReaderContext)and builds aScorerSupplierwrapper around it.- Overrides:
scorerSupplierin classWeight- Throws:
IOException- See Also:
Weight.scorer(org.apache.lucene.index.LeafReaderContext)
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scorer
public Scorer scorer(LeafReaderContext context) throws IOException
Description copied from class:WeightReturns aScorerwhich can iterate in order over all matching documents and assign them a score.NOTE: null can be returned if no documents will be scored by this query.
NOTE: The returned
Scorerdoes not haveLeafReader.getLiveDocs()applied, they need to be checked on top.- Specified by:
scorerin classWeight- Parameters:
context- theLeafReaderContextfor which to return theScorer.- Returns:
- a
Scorerwhich scores documents in/out-of order. - Throws:
IOException- if there is a low-level I/O error
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isCacheable
public boolean isCacheable(LeafReaderContext ctx)
- Returns:
trueif the object can be cached against a given leaf
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explain
public Explanation explain(LeafReaderContext context, int doc) throws IOException
Explain the score we computed for doc- Specified by:
explainin classWeight- Parameters:
context- the readers context to create theExplanationfor.doc- the document's id relative to the given context's reader- Returns:
- an Explanation for the score
- Throws:
IOException- if anIOExceptionoccurs
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