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https://issues.apache.org/jira/browse/LUCENE-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12733213#action_12733213
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Shai Erera commented on LUCENE-1754:
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bq. See ConstantScoreQuery.explain() for instance.
CSQ calls its own scorer(), therefore it knows it's going to get an instance
back.
In general, BooleanQuery already returns null today, so all I was saying is
that if someone called BQ.weight.scorer(), he had to check for null anyway. If
he didn't then his app would be exposed?
> Get rid of NonMatchingScorer from BooleanScorer2
> ------------------------------------------------
>
> Key: LUCENE-1754
> URL: https://issues.apache.org/jira/browse/LUCENE-1754
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Shai Erera
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1754.patch
>
>
> Over in LUCENE-1614 Mike has made a comment about removing NonMatchinScorer
> from BS2, and return null in BooleanWeight.scorer(). I've checked and this
> can be easily done, so I'm going to post a patch shortly. For reference:
> https://issues.apache.org/jira/browse/LUCENE-1614?focusedCommentId=12715064&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12715064.
> I've marked the issue as 2.9 just because it's small, and kind of related to
> all the search enhancements done for 2.9.
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