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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (OAK-169) Support orderable nodes
Date Tue, 10 Jul 2012 13:36:33 GMT

    [ https://issues.apache.org/jira/browse/OAK-169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13410332#comment-13410332
] 

Michael Dürig commented on OAK-169:
-----------------------------------

Thanks for digging this up. Citing from that message:

bq. for getChildNodeEntries() we can therefore drop the distinction between user-defined and
native order and just state that the iteration order is stable.

There is currently no statement about iteration order stability in the Microkernel API contract.
But the stability which the underlying implementation provides (AFICS) is too weak for implementing
efficient support for ordering on top of it. As I [said earlier|https://issues.apache.org/jira/browse/OAK-169?focusedCommentId=13410174&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13410174]
I'm fine with that and we should use the multi valued property if we need a stable order and/or
orderability. 
                
> Support orderable nodes
> -----------------------
>
>                 Key: OAK-169
>                 URL: https://issues.apache.org/jira/browse/OAK-169
>             Project: Jackrabbit Oak
>          Issue Type: New Feature
>          Components: jcr
>            Reporter: Jukka Zitting
>
> There are JCR clients that depend on the ability to explicitly specify the order of child
nodes. That functionality is not included in the MicroKernel tree model, so we need to implement
it either in oak-core or oak-jcr using something like an extra (hidden) {{oak:childOrder}}
property that records the specified ordering of child nodes. A multi-valued string property
is probably good enough for this.

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