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https://issues.apache.org/jira/browse/JCR-1972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730818#action_12730818
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Jukka Zitting commented on JCR-1972:
------------------------------------

The patch is creating lots of duplicate code in the extra methods. Can we avoid 
that?

Also, it would be good to have a check to prevent someone to add a new node 
with an id that already exists in the workspace.

> Preserving UUID and document version history on repository migration
> --------------------------------------------------------------------
>
>                 Key: JCR-1972
>                 URL: https://issues.apache.org/jira/browse/JCR-1972
>             Project: Jackrabbit Content Repository
>          Issue Type: Wish
>          Components: jackrabbit-core
>    Affects Versions: core 1.4.8
>            Reporter: Paco Avila
>         Attachments: Jackrabbit_modifications.pdf, JCR-1972.patch, 
> JCR-1972_1.x.patch
>
>
> I have been working I an migration utility for OpenKM and I performed some 
> changes in jackrabit-core to enable version import, preserving
> the modification date. Also modified org.apache.jackrabbit.core.NodeImpl to 
> preserve UUID in the migration process.
> This migration process is needed because there are changes in repository node 
> definition, and Jackrabbit can't deal with this actually.
> I've attache a PDF with the changes needed in Jackrabbit-core. It works and 
> there was no problems with the migrated repository.

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