org.apache.lucene.queries.function

Class FunctionScoreQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.queries.function.FunctionScoreQuery

public final class FunctionScoreQuery
extends Query

A query that wraps another query, and uses a DoubleValuesSource to replace or modify the wrapped query's score If the DoubleValuesSource doesn't return a value for a particular document, then that document will be given a score of 0.

Constructor Summary

Constructors

Constructor and Description
FunctionScoreQuery(Query in, DoubleValuesSource source) Create a new FunctionScoreQuery

Method Summary

Modifier and Type	Method and Description
Weight	createWeight(IndexSearcher searcher, boolean needsScores, float boost)
boolean	equals(Object o)
int	hashCode()
Query	rewrite(IndexReader reader)
String	toString(String field)

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

classHash, sameClassAs, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionScoreQuery

public FunctionScoreQuery(Query in,
                          DoubleValuesSource source)

Create a new FunctionScoreQuery

Parameters:

in - the query to wrap

source - a source of scores

Method Detail

createWeight

public Weight createWeight(IndexSearcher searcher,
                           boolean needsScores,
                           float boost)
                    throws IOException

Overrides:

createWeight in class Query

Throws:

IOException

rewrite

public Query rewrite(IndexReader reader)
              throws IOException

Overrides:

rewrite in class Query

Throws:

IOException

toString

public String toString(String field)

Specified by:

toString in class Query

equals

public boolean equals(Object o)

Specified by:

equals in class Query

hashCode

public int hashCode()

Specified by:

hashCode in class Query