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From "Earwin Burrfoot (JIRA)" <>
Subject [jira] Commented: (LUCENE-2439) Composite readers (Multi/DirIndexReader) should not subclass IndexReader
Date Tue, 04 May 2010 10:06:59 GMT


Earwin Burrfoot commented on LUCENE-2439:

I got sidetracked for some time, but plan to finish on this weekend.

> Composite readers (Multi/DirIndexReader) should not subclass IndexReader
> ------------------------------------------------------------------------
>                 Key: LUCENE-2439
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Michael McCandless
>             Fix For: 4.0.0
> I'd like to change Multi/DirIndexReader so that they no longer implement the low level
methods of IndexReader, and instead act more like an ordered collection of sub readers.  I
think to do this we'd need a new interface, common to atomic readers (SegmentReader) and the
composite readers, which IndexSearcher would accept.
> We should also require that the core Query scorers always receive an atomic reader.
> We've taken strong initial steps here with flex, by forcing users to use separate MultiFields
static methods to obtain Fields/Terms/etc. from a composite reader.  This issue is to finish
this cutover.

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