Module org.apache.lucene.queries
Class FunctionMatchQuery
java.lang.Object
org.apache.lucene.search.Query
org.apache.lucene.queries.function.FunctionMatchQuery
A query that retrieves all documents with a
DoubleValues
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
-
Field Summary
FieldsModifier and TypeFieldDescription(package private) static final float
private final DoublePredicate
private final float
private final DoubleValuesSource
-
Constructor Summary
ConstructorsConstructorDescriptionFunctionMatchQuery
(DoubleValuesSource source, DoublePredicate filter) Create a FunctionMatchQuery with default TwoPhaseIterator matchCost -DEFAULT_MATCH_COST
= 100.0fFunctionMatchQuery
(DoubleValuesSource source, DoublePredicate filter, float matchCost) Create a FunctionMatchQuery -
Method Summary
Modifier and TypeMethodDescriptioncreateWeight
(IndexSearcher searcher, ScoreMode scoreMode, float boost) Expert: Constructs an appropriate Weight implementation for this query.boolean
Override and implement query instance equivalence properly in a subclass.int
hashCode()
Override and implement query hash code properly in a subclass.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 queriesMethods inherited from class org.apache.lucene.search.Query
classHash, rewrite, sameClassAs, toString
-
Field Details
-
DEFAULT_MATCH_COST
static final float DEFAULT_MATCH_COST- See Also:
-
source
-
filter
-
matchCost
private final float matchCost
-
-
Constructor Details
-
FunctionMatchQuery
Create a FunctionMatchQuery with default TwoPhaseIterator matchCost -DEFAULT_MATCH_COST
= 100.0f- Parameters:
source
- aDoubleValuesSource
to use for valuesfilter
- the predicate to match against
-
FunctionMatchQuery
Create a FunctionMatchQuery- Parameters:
source
- aDoubleValuesSource
to use for valuesfilter
- the predicate to match againstmatchCost
- to be returned byTwoPhaseIterator.matchCost()
-
-
Method Details
-
toString
Description copied from class:Query
Prints a query to a string, withfield
assumed to be the default field and omitted. -
visit
Description copied from class:Query
Recurse through the query tree, visiting any child queries -
createWeight
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws 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:
IOException
-
equals
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.
-
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.
-