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https://issues.apache.org/jira/browse/LUCENE-2831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12974738#action_12974738
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Michael McCandless commented on LUCENE-2831:
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I'm confused -- there'd be no restriction with this approach? Ie it
would allow for a sub that's shared in different top readers.
The IR has .getTopReaderInfo(). This returns a full ReaderInfo tree
for all subs under that top. That info is stored, privately, in only
that top reader (not on the subs). When you call .getTopReaderInfo(),
no ReaderInfo is set on any of the subs. Only that top reader holds
this tree.
> Revise Weight#scorer & Filter#getDocIdSet API to pass Readers context
> ---------------------------------------------------------------------
>
> Key: LUCENE-2831
> URL: https://issues.apache.org/jira/browse/LUCENE-2831
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Assignee: Simon Willnauer
> Fix For: 4.0
>
> Attachments: LUCENE-2831.patch
>
>
> Spinoff from LUCENE-2694 - instead of passing a reader into Weight#scorer(IR,
> boolean, boolean) we should / could revise the API and pass in a struct that
> has parent reader, sub reader, ord of that sub. The ord mapping plus the
> context with its parent would make several issues way easier. See
> LUCENE-2694, LUCENE-2348 and LUCENE-2829 to name some.
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