Package org.apache.lucene.search.payloads

Class PayloadTermQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.spans.SpanQuery

org.apache.lucene.search.spans.SpanTermQuery

org.apache.lucene.search.payloads.PayloadTermQuery

All Implemented Interfaces:

Cloneable

public class PayloadTermQuery
extends SpanTermQuery

This class is very similar to SpanTermQuery except that it factors in the value of the payload located at each of the positions where the Term occurs.

NOTE: In order to take advantage of this with the default scoring implementation (DefaultSimilarity), you must override DefaultSimilarity.scorePayload(int, int, int, BytesRef), which returns 1 by default.

Payload scores are aggregated using a pluggable PayloadFunction.

See Also:

Similarity.SimScorer.computePayloadFactor(int, int, int, BytesRef)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	PayloadTermQuery.PayloadTermWeight

Field Summary

Fields

Modifier and Type	Field	Description
protected PayloadFunction	function

Fields inherited from class org.apache.lucene.search.spans.SpanTermQuery

term

Constructor Summary

Constructors

Constructor	Description
PayloadTermQuery(Term term, PayloadFunction function)
PayloadTermQuery(Term term, PayloadFunction function, boolean includeSpanScore)

Method Summary

Modifier and Type	Method	Description
Weight	createWeight(IndexSearcher searcher)	Expert: Constructs an appropriate Weight implementation for this query.
boolean	equals(Object obj)
int	hashCode()

Methods inherited from class org.apache.lucene.search.spans.SpanTermQuery

extractTerms, getField, getSpans, getTerm, toString

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

clone, getBoost, rewrite, setBoost, toString

Methods inherited from class java.lang.Object

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

Field Detail

function

protected PayloadFunction function

Constructor Detail

PayloadTermQuery

public PayloadTermQuery(Term term,
                        PayloadFunction function)

PayloadTermQuery

public PayloadTermQuery(Term term,
                        PayloadFunction function,
                        boolean includeSpanScore)

Method Detail

createWeight

public Weight createWeight(IndexSearcher searcher)
                    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 class SpanQuery

Throws:

IOException

hashCode

public int hashCode()

Overrides:

hashCode in class SpanTermQuery

equals

public boolean equals(Object obj)

Overrides:

equals in class SpanTermQuery