Class FunctionMatchQuery
- java.lang.Object
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- org.apache.lucene.search.Query
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- org.apache.lucene.queries.function.FunctionMatchQuery
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public final class FunctionMatchQuery extends Query
A query that retrieves all documents with aDoubleValues
value matching a predicate This query works by a linear scan of the index, and is best used in conjunction with other queries that can restrict the number of documents visited
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Field Summary
Fields Modifier and Type Field Description private java.util.function.DoublePredicate
filter
private DoubleValuesSource
source
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Constructor Summary
Constructors Constructor Description FunctionMatchQuery(DoubleValuesSource source, java.util.function.DoublePredicate filter)
Create a FunctionMatchQuery
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Weight
createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)
Expert: Constructs an appropriate Weight implementation for this query.boolean
equals(java.lang.Object o)
Override and implement query instance equivalence properly in a subclass.int
hashCode()
Override and implement query hash code properly in a subclass.java.lang.String
toString(java.lang.String field)
Prints a query to a string, withfield
assumed to be the default field and omitted.void
visit(QueryVisitor visitor)
Recurse through the query tree, visiting any child queries-
Methods inherited from class org.apache.lucene.search.Query
classHash, rewrite, sameClassAs, toString
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Field Detail
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source
private final DoubleValuesSource source
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filter
private final java.util.function.DoublePredicate filter
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Constructor Detail
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FunctionMatchQuery
public FunctionMatchQuery(DoubleValuesSource source, java.util.function.DoublePredicate filter)
Create a FunctionMatchQuery- Parameters:
source
- aDoubleValuesSource
to use for valuesfilter
- the predicate to match against
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Method Detail
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toString
public java.lang.String toString(java.lang.String field)
Description copied from class:Query
Prints a query to a string, withfield
assumed to be the default field and omitted.
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visit
public void visit(QueryVisitor visitor)
Description copied from class:Query
Recurse through the query tree, visiting any child queries
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createWeight
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws java.io.IOException
Description copied from class:Query
Expert: Constructs an appropriate Weight implementation for this query.Only implemented by primitive queries, which re-write to themselves.
- Overrides:
createWeight
in classQuery
scoreMode
- How the produced scorers will be consumed.boost
- The boost that is propagated by the parent queries.- Throws:
java.io.IOException
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equals
public boolean equals(java.lang.Object o)
Description copied from class:Query
Override and implement query instance equivalence properly in a subclass. This is required so thatQueryCache
works properly. Typically a query will be equal to another only if it's an instance of the same class and its document-filtering properties are identical that other instance. Utility methods are provided for certain repetitive code.- Specified by:
equals
in classQuery
- See Also:
Query.sameClassAs(Object)
,Query.classHash()
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hashCode
public int hashCode()
Description copied from class:Query
Override and implement query hash code properly in a subclass. This is required so thatQueryCache
works properly.- Specified by:
hashCode
in classQuery
- See Also:
Query.equals(Object)
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