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

Sun, 25 May 2014 11:21

Matthias Freund

Messages: 8
Registered: May 2014

Junior Member

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

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

Sun, 25 May 2014 19:26

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

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
>

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

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