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https://issues.apache.org/jira/browse/LUCENE-3918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated LUCENE-3918:
-------------------------------

    Attachment: LUCENE-3918.patch

Patch does:

* Get rid of SortDoc. Sorter is now abstract class with a helper {{int[] 
compute(int[] docs, T[] values)}} method which sorter implementations can call 
to implement oldToNew().
** Thanks Uwe for helping me sort out the generics signatures!!

* Folded all SortingXYZ classes as private inner classes of 
SortingAtomicReader. While it increases SortingAR's code size, I feel that's 
the right thing to do, as these classes have no business on their own (even as 
package-private). If in the future we'll want to open them up for extension, we 
can make them public or something.

* Add {{getWrapped}} to both SortingDocsEnum and Positions, and implemented 
reuse as suggested by Adrien.
                
> Port index sorter to trunk APIs
> -------------------------------
>
>                 Key: LUCENE-3918
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3918
>             Project: Lucene - Core
>          Issue Type: Task
>          Components: modules/other
>    Affects Versions: 4.0-ALPHA
>            Reporter: Robert Muir
>             Fix For: 4.2, 5.0
>
>         Attachments: LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch, 
> LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch, 
> LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch
>
>
> LUCENE-2482 added an IndexSorter to 3.x, but we need to port this
> functionality to 4.0 apis.

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