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https://issues.apache.org/jira/browse/LUCENE-4746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14262257#comment-14262257
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Uwe Schindler commented on LUCENE-4746:
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bq. What is the rant about unwrapping? There is no unwrapping in my patch. I
have not and will not touch any unwrap method here on this issue. I didn't even
know it existed.
Was not about your patch. I will open another issue obout this horrible unwrap
method. Its a bad sign, does not affect this issue. I was just looking for a
solutions for the instanceof shit.
> Create a move method in Directory.
> ----------------------------------
>
> Key: LUCENE-4746
> URL: https://issues.apache.org/jira/browse/LUCENE-4746
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Mark Miller
> Assignee: Mark Miller
> Fix For: 4.9, Trunk
>
> Attachments: LUCENE-4746.patch, LUCENE-4746.patch
>
>
> I'd like to make a move method for directory.
> We already have a move for Solr in DirectoryFactory, but it seems it belongs
> at the directory level really.
> The default impl can do a copy and delete, but most implementations will be
> able to optimize to a rename.
> Besides the move we do for Solr (to move a replicated index into place), it
> would also be useful for another feature I'd like to add - the ability to
> merge an index with moves rather than copies. In some cases, you don't
> need/want to copy all the files and could just rename/move them.
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