org.apache.lucene.search.spans
Class SpanQuery

java.lang.Object
  extended by org.apache.lucene.search.Query
      extended by org.apache.lucene.search.spans.SpanQuery
All Implemented Interfaces:
Serializable, Cloneable
Direct Known Subclasses:
FieldMaskingSpanQuery, SpanMultiTermQueryWrapper, SpanNearQuery, SpanNotQuery, SpanOrQuery, SpanPositionCheckQuery, SpanTermQuery

public abstract class SpanQuery
extends Query

Base class for span-based queries.

See Also:
Serialized Form

Constructor Summary
SpanQuery()
           
 
Method Summary
 Weight createWeight(Searcher searcher)
          Expert: Constructs an appropriate Weight implementation for this query.
abstract  String getField()
          Returns the name of the field matched by this query.
abstract  Spans getSpans(IndexReader reader)
          Expert: Returns the matches for this query in an index.
 
Methods inherited from class org.apache.lucene.search.Query
clone, combine, equals, extractTerms, getBoost, getSimilarity, hashCode, mergeBooleanQueries, rewrite, setBoost, toString, toString, weight
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SpanQuery

public SpanQuery()
Method Detail

getSpans

public abstract Spans getSpans(IndexReader reader)
                        throws IOException
Expert: Returns the matches for this query in an index. Used internally to search for spans.

Throws:
IOException

getField

public abstract String getField()
Returns the name of the field matched by this query.


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 Query
Throws:
IOException


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