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Deletion of contained objects [message #487629]

Wed, 23 September 2009 19:54

Babloo

Messages: 12
Registered: September 2009

Junior Member

Hi,

I am using EMF 2.4.
I have a EClass (say ClassA) that contains a reference object (say ref1) -- which is contained.
This same EClass has another contained object (say ref2) , which has a eref to ref1 (which is non-contained from ref2).
When I try remove ref1 from ClassA, it still remains in ref2. How do I get this to go away as well?

I have this same pattern in several different objects as well. Hence, I would not want to write some kind of Adapter to deal with this situation.

Please advice on how do i handle this situation.

Thanks,
Babs

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Re: Deletion of contained objects [message #487687 is a reply to message #487629]

Thu, 24 September 2009 07:26

Ed Merks

Messages: 33147
Registered: July 2009

Senior Member

Babs,

Comments below.

babloo80@gmail.com wrote:
> Hi,
>
> I am using EMF 2.4.
> I have a EClass (say ClassA) that contains a reference object (say
> ref1) -- which is contained.
> This same EClass has another contained object (say ref2) , which has a
> eref to ref1 (which is non-contained from ref2). When I try remove
> ref1 from ClassA, it still remains in ref2. How do I get this to go
> away as well?
You could try EcoreUtil.delete, it removes the object from its container
and removes all references to it. It can also recursively act on all
contained children of the deleted object.
>
> I have this same pattern in several different objects as well. Hence,
> I would not want to write some kind of Adapter to deal with this
> situation.
>
> Please advice on how do i handle this situation.
>
> Thanks,
> Babs

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: Deletion of contained objects [message #488148 is a reply to message #487687]

Fri, 25 September 2009 17:00

Babloo

Messages: 12
Registered: September 2009

Junior Member

Hello Ed,

I forgot to mention, I am using this (Ecoreutil.delete()) as a workaround.
Wondering to see, if there is an OOTB annotation in EMF that I could use to achieve this in the generated code?
Or, may be, I have to write a custom annotation for this? If yes, is there a sample that i could look at?

Ed - Thank you for looking into this!

Thanks,
Babs

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Re: Deletion of contained objects [message #488163 is a reply to message #488148]

Fri, 25 September 2009 17:53

Ed Merks

Messages: 33147
Registered: July 2009

Senior Member

Babs,

Something like this needs to be done using reflection because you can't
generally know all possible references to the object from just the model
information available to the generated model. So no, expect the
generated model to support only finer grained operations...

babloo80@gmail.com wrote:
> Hello Ed,
>
> I forgot to mention, I am using this (Ecoreutil.delete()) as a
> workaround. Wondering to see, if there is an OOTB annotation in EMF
> that I could use to achieve this in the generated code?
> Or, may be, I have to write a custom annotation for this? If yes, is
> there a sample that i could look at?
>
> Ed - Thank you for looking into this!
>
> Thanks,
> Babs

Ed Merks
Professional Support: https://www.macromodeling.com/

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