org.apache.lucene.search.spans
Class SpanFirstQuery

java.lang.Object
  org.apache.lucene.search.Query
      org.apache.lucene.search.spans.SpanQuery
          org.apache.lucene.search.spans.SpanPositionCheckQuery
              org.apache.lucene.search.spans.SpanPositionRangeQuery
                  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:

• If the query was created by the parser, the printed representation may not be exactly what was parsed. For example, characters that need to be escaped will be represented without the required backslash.
• Some of the more complicated queries (e.g. span queries) don't have a representation that can be parsed by QueryParser.

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