[ http://jira.codehaus.org/browse/XDP-49?page=all ]
John Latham updated XDP-49:
---------------------------
Attachment: XDoclet2PlaypenWithUnionSubclass.zip
Test project now includes union-subclass usage.
> Support for union-subclass
> --------------------------
>
> Key: XDP-49
> URL: http://jira.codehaus.org/browse/XDP-49
> Project: XDoclet 2 Plugins
> Type: New Feature
> Components: hibernate
> Versions: hibernate-1.0
> Environment: Win32, Eclipse IDE
> Reporter: John Latham
> Assignee: Anatol Pomozov
> Attachments: XDoclet2Playpen.zip, XDoclet2PlaypenWithUnionSubclass.zip
>
>
> Attached is my Eclipse project including unit tests. The model is a simple
> Customer/Payment model, where Payment has three subclasses, as used in the
> Hibernate Reference documentation.
> There are currently two issues:
> 1. Cascase creates don't work. I have annotated Customer (the parent) with
> '@hibernate.set lazy="true" inverse="true" cascade="all"', but this isn't
> propagated to Customer.hbm.xml when the mappings are generated. Consequently,
> the relationship is only mapped from the Payment (child) class.
> 2. There is not currently support for union-subclass. This is difficult for
> me to write tests for, since I don't know what syntax to use. The mapping I
> am aiming for is the "Table per concrete class" approach documented in
> section 9.1.5. of the Hibernate reference doc. In the current project, I
> instead use "Table per subclass, using a discriminator".
> So, perhaps the steps are:
> (a) Fix the cascade issue
> (b) Implement union-subclass support.
> (c) Change the xdoclet tags in this test project to implement "Table per
> concrete class" using union-subclass.
> (d) Maybe tweak the tests in this project. Sorry this is a bit vague, but
> since I haven't used union-subclass I'm not quite sure what the test should
> look like. The current tests (e.g. testPolymorphicAssociations) may do it.
> I'm happy to help further with, perhaps when (a) and (b) are done I could do
> (c) and (d).
> Please tell me if my approach is wrong, this is the first open source project
> I've been involved with!
> Regards,
> John Latham
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