[jira] Updated: (JCR-2688) Provide utility for handling large number of child nodes/properties

["Jukka Zitting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCR-2688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting updated JCR-2688:
-------------------------------

    Attachment: JCR-2688-no-cc.patch

BTW, I'm not too excited about the new commons-collections dependency in jcr-commons. So far we've tried to minimize the number of dependencies in jcr-commons.

The attached patch (JCR-2688-no-cc.patch) replaces the commons-collections dependencies in o.a.j.commons.flat with roughly equivalent constructs from the standard Java libraries.

There are still a few related iterator classes based on commons-collections after JCR-2698. I'll reopen that issue to figure out what to do with them.

> Provide utility for handling large number of child nodes/properties
> -------------------------------------------------------------------
>
>                 Key: JCR-2688
>                 URL: https://issues.apache.org/jira/browse/JCR-2688
>             Project: Jackrabbit Content Repository
>          Issue Type: New Feature
>          Components: jackrabbit-jcr-commons
>    Affects Versions: 2.2.0
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>             Fix For: 2.2.0
>
>         Attachments: JCR-2688-no-cc.patch, JCR-2688.patch
>
>
> Jackrabbit does not cope well with 'flat' hierarchies. That is with hierarchies where a node has many child nodes and/or properties. The current recommendation for such situations is to manually add intermediate nodes. 
> It would be nice to have an utility which adds/removes intermediate nodes as needed and expose a 'flat' view to users. Such an utility should:
> - expose a large number of nodes/properties as sequence
> - parametrize the order of how nodes/properties appear in the sequence
> - provide methods to lookup/add/remove nodes/properties by key 
> - organize the node/properties in the underlying JCR hierarchy in a way which is both efficient for above operations and easily understandable to users looking at the hierarchy. 

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