[jira] Updated: (LUCENE-2590) Enable access to the freq information in a Query's sub-scorers

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-2590?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless updated LUCENE-2590:
---------------------------------------

    Attachment: LUCENE-2590.patch

Attached patch.

There were two things to fix.  First, I added Scorer.freq() so that
you could get the freq of the current match.  Second, I added a way to
visit all sub-scorers for a given Scorer.  The functionality is
definitely expert level -- you'll have to make a custom Collector that
gathers these stats & saves them away in your PQ, to use this "for
real".  But it's a good start I think; there's a simple test case
showing how it works.


> Enable access to the freq information in a Query's sub-scorers
> --------------------------------------------------------------
>
>                 Key: LUCENE-2590
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2590
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>         Attachments: LUCENE-2590.patch
>
>
> The ability to gather more details than just the score, of how a given
> doc matches the current query, has come up a number of times on the
> user's lists.  (most recently in the thread "Query Match Count" by
> Ryan McV on java-user).
> EG if you have a simple TermQuery "foo", on each hit you'd like to
> know how many times "foo" occurred in that doc; or a BooleanQuery +foo
> +bar, being able to separately see the freq of foo and bar for the
> current hit.
> Lucene doesn't make this possible today, which is a shame because
> Lucene in fact does compute exactly this information; it's just not
> accessible from the Collector.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org