org.apache.lucene.search.spans
Class SpanFirstQuery

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.SpanPositionCheckQuery
              extended by org.apache.lucene.search.spans.SpanPositionRangeQuery
                  extended by org.apache.lucene.search.spans.SpanFirstQuery
All Implemented Interfaces:
Serializable, Cloneable

public class SpanFirstQuery
extends SpanPositionRangeQuery

Matches spans near the beginning of a field.

This class is a simple extension of SpanPositionRangeQuery in that it assumes the start to be zero and only checks the end boundary.

See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.lucene.search.spans.SpanPositionCheckQuery
SpanPositionCheckQuery.AcceptStatus, SpanPositionCheckQuery.PositionCheckSpan
 
Field Summary
 
Fields inherited from class org.apache.lucene.search.spans.SpanPositionRangeQuery
end, start
 
Fields inherited from class org.apache.lucene.search.spans.SpanPositionCheckQuery
match
 
Constructor Summary
SpanFirstQuery(SpanQuery match, int end)
          Construct a SpanFirstQuery matching spans in match whose end position is less than or equal to end.
 
Method Summary
protected  SpanPositionCheckQuery.AcceptStatus acceptPosition(Spans spans)
          Implementing classes are required to return whether the current position is a match for the passed in "match" SpanQuery.
 Object clone()
          Returns a clone of this query.
 boolean equals(Object o)
           
 int hashCode()
           
 String toString(String field)
          Prints a query to a string, with field assumed to be the default field and omitted.
 
Methods inherited from class org.apache.lucene.search.spans.SpanPositionRangeQuery
getEnd, getStart
 
Methods inherited from class org.apache.lucene.search.spans.SpanPositionCheckQuery
extractTerms, getField, getMatch, getSpans, rewrite
 
Methods inherited from class org.apache.lucene.search.spans.SpanQuery
createWeight
 
Methods inherited from class org.apache.lucene.search.Query
combine, getBoost, getSimilarity, mergeBooleanQueries, setBoost, toString, weight
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SpanFirstQuery

public SpanFirstQuery(SpanQuery match,
                      int end)
Construct a SpanFirstQuery matching spans in match whose end position is less than or equal to end.

Method Detail

acceptPosition

protected SpanPositionCheckQuery.AcceptStatus acceptPosition(Spans spans)
                                                      throws IOException
Description copied from class: SpanPositionCheckQuery
Implementing classes are required to return whether the current position is a match for the passed in "match" SpanQuery. This is only called if the underlying Spans.next() for the match is successful

Overrides:
acceptPosition in class SpanPositionRangeQuery
Parameters:
spans - The Spans instance, positioned at the spot to check
Returns:
whether the match is accepted, rejected, or rejected and should move to the next doc.
Throws:
IOException
See Also:
Spans.next()

toString

public String toString(String field)
Description copied from class: Query
Prints a query to a string, with field assumed to be the default field and omitted.

The representation used is one that is supposed to be readable by QueryParser. However, there are the following limitations:

Overrides:
toString in class SpanPositionRangeQuery

clone

public Object clone()
Description copied from class: Query
Returns a clone of this query.

Overrides:
clone in class SpanPositionRangeQuery

equals

public boolean equals(Object o)
Overrides:
equals in class SpanPositionRangeQuery

hashCode

public int hashCode()
Overrides:
hashCode in class SpanPositionRangeQuery


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