org.apache.lucene.search.payloads
Class PayloadTermQuery

java.lang.Object
  extended by org.apache.lucene.search.Query
      extended by org.apache.lucene.search.spans.SpanQuery
          extended by org.apache.lucene.search.spans.SpanTermQuery
              extended by org.apache.lucene.search.payloads.PayloadTermQuery
All Implemented Interfaces:
Serializable, 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.

In order to take advantage of this, you must override Similarity.scorePayload(int, String, int, int, byte[],int,int) which returns 1 by default.

Payload scores are aggregated using a pluggable PayloadFunction.

See Also:
Serialized Form

Nested Class Summary
protected  class PayloadTermQuery.PayloadTermWeight
           
 
Field Summary
protected  PayloadFunction function
           
 
Fields inherited from class org.apache.lucene.search.spans.SpanTermQuery
term
 
Constructor Summary
PayloadTermQuery(Term term, PayloadFunction function)
           
PayloadTermQuery(Term term, PayloadFunction function, boolean includeSpanScore)
           
 
Method Summary
 Weight createWeight(Searcher 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, combine, getBoost, getSimilarity, mergeBooleanQueries, rewrite, setBoost, toString, weight
 
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(Searcher 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


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