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:

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.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.spans.SpanPositionCheckQuery

SpanPositionCheckQuery.SpanPositionCheckWeight

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

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected FilterSpans.AcceptStatus	acceptPosition(Spans spans) Implementing classes are required to return whether the current position is a match for the passed in "match" SpanQuery.
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

equals, getEnd, getStart, hashCode

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

createWeight, getField, getMatch, rewrite

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

getTermContexts, getTermContexts

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

classHash, sameClassAs, toString

Methods inherited from class java.lang.Object

clone, 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 FilterSpans.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 last Spans.nextStartPosition() for the match indicated a valid start position.

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:

DocIdSetIterator.nextDoc()

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.

Overrides:

toString in class SpanPositionRangeQuery