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EMF - How to restrict values of non-containment references? [message #1381082]

Sun, 25 May 2014 07:21

Eclipse User

Hi all,

in my metamodel, I have defined an EClass with a non-containment reference. If I instantiate a model and use the "Properties" view to set a value for this reference, the drop-down list displays all existing instances of the type of the reference as possible values.

Now, I want to restrict the values shown by an additional algorithm. Where can I implement this algorithm? As far as I understand EMF, this should be done in the "edit" part of the generated code but I cannot seem to find the right place. Which is the method that is called by the "Properties" view to retrieve all possible matches?

Or is there any possibility to implement such additional constraints for reference values in the "model" part of the generated code?

Thanks in advance!
Matthias

Re: EMF - How to restrict values of non-containment references? [message #1381872 is a reply to message #1381082]

Sun, 25 May 2014 15:26

Eclipse User

http://wiki.eclipse.org/EMF/FAQ#How_can_I_control_which_instances_are_available_as_choices_when_editing_a_property_in_the_properties_view.3F

On 25/05/2014 5:39 PM, Matthias Freund wrote:
> Hi all,
>
> in my metamodel, I have defined an EClass with a non-containment
> reference. If I instantiate a model and use the "Properties" view to
> set a value for this reference, the drop-down list displays all
> existing instances of the type of the reference as possible values.
>
> Now, I want to restrict the values shown by an additional algorithm.
> Where can I implement this algorithm? As far as I understand EMF, this
> should be done in the "edit" part of the generated code but I cannot
> seem to find the right place. Which is the method that is called by
> the "Properties" view to retrieve all possible matches?
>
> Or is there any possibility to implement such additional constraints
> for reference values in the "model" part of the generated code?
>
> Thanks in advance!
> Matthias
>

Re: EMF - How to restrict values of non-containment references? [message #1383190 is a reply to message #1381872]

Mon, 26 May 2014 04:46

Eclipse User

Hi Ed,

thanks for the hint! Works like a charm...

Kind regards,
Matthias

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