Package org.apache.lucene.queries.function

Class FunctionMatchQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.queries.function.FunctionMatchQuery

public final class FunctionMatchQuery
extends Query

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

Constructor Summary

Constructors

Constructor	Description
FunctionMatchQuery(DoubleValuesSource source, DoublePredicate filter)	Create a FunctionMatchQuery with default TwoPhaseIterator matchCost - DEFAULT_MATCH_COST = 100.0f
FunctionMatchQuery(DoubleValuesSource source, DoublePredicate filter, float matchCost)	Create a FunctionMatchQuery

Method Summary

Modifier and Type	Method	Description
Weight	createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)
boolean	equals(Object o)
int	hashCode()
String	toString(String field)
void	visit(QueryVisitor visitor)

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

classHash, rewrite, rewrite, sameClassAs, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

FunctionMatchQuery

public FunctionMatchQuery(DoubleValuesSource source,
 DoublePredicate filter)

Create a FunctionMatchQuery with default TwoPhaseIterator matchCost - DEFAULT_MATCH_COST = 100.0f

Parameters:

source - a DoubleValuesSource to use for values

filter - the predicate to match against

FunctionMatchQuery

public FunctionMatchQuery(DoubleValuesSource source,
 DoublePredicate filter,
 float matchCost)

Create a FunctionMatchQuery

Parameters:

source - a DoubleValuesSource to use for values

filter - the predicate to match against

matchCost - to be returned by TwoPhaseIterator.matchCost()

Method Details

toString

public String toString(String field)

Specified by:

toString in class Query

visit

public void visit(QueryVisitor visitor)

Specified by:

visit in class Query

createWeight

public Weight createWeight(IndexSearcher searcher,
 ScoreMode scoreMode,
 float boost)
                    throws IOException

Overrides:

createWeight in class Query

Throws:

IOException

equals

public boolean equals(Object o)

Specified by:

equals in class Query

hashCode

public int hashCode()

Specified by:

hashCode in class Query