[ http://issues.apache.org/jira/browse/LUCENE-370?page=all ]
Yonik Seeley closed LUCENE-370:
-------------------------------
Fix Version: 1.9
Resolution: Fixed
Assign To: (was: Lucene Developers)
> BooleanQuery assumes everything else implements skipTo
> ------------------------------------------------------
>
> Key: LUCENE-370
> URL: http://issues.apache.org/jira/browse/LUCENE-370
> Project: Lucene - Java
> Type: Bug
> Components: Search
> Versions: 1.4
> Environment: Operating System: other
> Platform: All
> Reporter: Yonik Seeley
> Fix For: 1.9
>
> skipTo seems to be optional functionality on the Scorer class (BooleanScorer
> doesn't implement it). BooleanQuery.scorer() tests all subclauses using
> "instanceof BooleanQuery" to determine if it can use a ConjunctionScorer that
> requires skipTo functionality.
> This means that any other new Query/Scorer that don't implement skipTo will
> get
> into trouble when included in a BooleanQuery.
> If skipTo is really optional, then there should be some way of telling by the
> Scorer or the Query in a more generic manner.
> Some options:
> 1) have a "boolean Scorer.hasSkipTo()" method
> 2) have a "boolean Query.hasSkipTo()" method
> 3) remove Scorer.skipTo and have a "public interface ScorerSkipTo{boolean
> skipTo(int doc)}" that scorers may implement
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