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http://jira.magnolia-cms.com/browse/MGNLDATA-68?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=24303#action_24303
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Jan Haderka commented on MGNLDATA-68:
-------------------------------------

After upgrade to 1.4-snapshot (with the patch applied) from 1.3.2 I get NPE 
when trying to display the types tree. Have you seen this? It must be some of 
the changes to the tree or tree configuration and will need probably also 
update task to make sure the modified tree still works after the upgrade. 
Unfortunately it is difficult to follow the changes in the code since there are 
also many purely formatting changes giving the false positives. You might 
consider next time to do the first all formatting changes (if necessary) and 
put them in one patch, and only then start changing the code and have purely 
code related changes in another patch (too late for this now).

> Allow creation of types and data nodes in a hierarchy.
> ------------------------------------------------------
>
>                 Key: MGNLDATA-68
>                 URL: http://jira.magnolia-cms.com/browse/MGNLDATA-68
>             Project: Magnolia Data Module
>          Issue Type: Improvement
>    Affects Versions: 1.4
>            Reporter: Bert Leunis
>            Assignee: Jan Haderka
>         Attachments: magnolia-module-data.patch
>
>
> See this entry in the wiki for the description of the desired functionality: 
> http://wiki.magnolia-cms.com/display/DEV/Magnolia+Data+Module+Extensions+-+Mixed+type+hierarchies.
> There are many changes to accommodate the new functionality. Here are the 
> main changes:
> - Many classes that create, delete, display the types or the nodes are 
> touched to accommodate the new structure.
> - the DataModule now stores the typedefinitions
> - DataModule creates only one menu entry per rootpath
> - the title of the menu entry can be given in the type definition (sometimes 
> the root type does not explain the main content of a type tree)
> - TypeDeleteCommand: I am not sure if this ever worked correctly. Should do 
> now, and also deletes the tree belonging to the type.
> - TypeDialog: rootpath, allow folders, sort by name are only to be edited in 
> the root type
> - new TypeSelectDataDialog: when creating a new type, will check if there are 
> multiple options of types to create
> - TypeAdminTree and GenericDataAdminTree: lot of new code
> - When working with folders: they are only allowed at the root, not within 
> the type trees itself
> - When items are moved or copied within the tree, if the type definition 
> structure would be broken, the move/copy is prevented.

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