[jira] [Commented] (LUCENE-5666) Add UninvertingReader

["Mikhail Khludnev (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-5666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14084125#comment-14084125 ] 

Mikhail Khludnev commented on LUCENE-5666:
------------------------------------------

[~rcmuir] I'm poring SOLR-6234 to trunk, and observe the annoying issue. Before, FieldCache was always available, but now if doc-vals are not written (indexed), DocValues.get...  yields emptyXxx, that break tests silently. I'd rather prefer to get NPE or other Illegal..Exception explicitly. 
What do I see wrong?  

> Add UninvertingReader
> ---------------------
>
>                 Key: LUCENE-5666
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5666
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>             Fix For: 5.0
>
>         Attachments: LUCENE-5666.patch
>
>
> Currently the fieldcache is not pluggable at all. It would be better if everything used the docvalues apis.
> This would allow people to customize the implementation, extend the classes with custom subclasses with additional stuff, etc etc.
> FieldCache can be accessed via the docvalues apis, using the FilterReader api.



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