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From "Alan Woodward (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-6272) Scorer should not extend PostingsEnum
Date Fri, 20 Feb 2015 22:03:12 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14329642#comment-14329642
] 

Alan Woodward commented on LUCENE-6272:
---------------------------------------

Yes, IntelliJ.  I've got the template set up as:
* other imports
* <blank line>
* import javax.*
* import java.*
* <blank line>
* static imports

> Scorer should not extend PostingsEnum
> -------------------------------------
>
>                 Key: LUCENE-6272
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6272
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Alan Woodward
>            Priority: Minor
>         Attachments: LUCENE-6272.patch, LUCENE-6272.patch
>
>
> Scorer currently has to implement a whole bunch of methods that are never called.  The
only method that Scorer uses in addition to the methods on DocIdSetIterator is freq(), and
as currently implemented this means different things on different Scorers:
> * TermScorer returns its underlying termfreq
> * MinShouldMatchScorer returns how many of its subscorers are matching
> * {Exact|Sloppy}PhraseScorer returns how many phrases it has found on a document
> In addition, freq() is never actually called on TermScorer, and it's only used in explain()
on the phrase scorers.
> We should make Scorer extend DocIdSetIterator instead.  In place of freq(), Scorer would
have a coord() method that by default returns 1, and for boolean scorers returns how many
subscorers are matching.



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