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Date: Wed, 22 Jul 2009 08:51:14 -0700 (PDT)
From: "Michael McCandless (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-1754) Get rid of NonMatchingScorer from
 BooleanScorer2
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    [ https://issues.apache.org/jira/browse/LUCENE-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12734164#action_12734164 ] 

Michael McCandless commented on LUCENE-1754:
--------------------------------------------

I think we continue to allow scorer() and getDocIdSet to return null to mean "no matches", though they are not required too (ie, one cannot assume that a non-null return means there are matches).

And we should make this clear in the javadocs.

And remove NonMatchingScorer.

> 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
>            Assignee: Michael McCandless
>            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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