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https://issues.apache.org/jira/browse/LUCENE-5690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14003803#comment-14003803
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Uwe Schindler commented on LUCENE-5690:
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bq. MultiTermsEnum and MultiDocsEnum both expose their subs

I don't see this in the code of MultiTermsEnum. Both have the arrays private 
and MultiTermsEnum has no getter (at least in trunk). MultiDocsEnum has a 
getter (not sure why). In MultiTermsEnum there is one public getter, but this 
one returns a package private class, so unuseable to the user (this is a bug) - 
should be removed.

This patch is fine if you make the methods return List<Terms> and 
List<ReaderSlice>, both with 
{{Collections.unmodifiableList(Arrays.asList(...))}}. But ReaderSlice is also a 
more or less "private" class (its just public for cross-package access).

What's the reason to have those public at all?

> expose sub-Terms from MultiTerms
> --------------------------------
>
>                 Key: LUCENE-5690
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5690
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Yonik Seeley
>         Attachments: LUCENE-5690.patch
>
>
> MultiTermsEnum and MultiDocsEnum both expose their subs.  It would be useful 
> to do the same for MultiTerms.



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