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Xor Constraint with EMF [message #1070822]

Thu, 18 July 2013 15:00

Eclipse User

Hi,

what's the best way to realize a UML XOR constraint with EMF. The following model gives you an idea what I mean:

index.php/fa/15638/0/

Cheers,
Phil

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Re: Xor Constraint with EMF [message #1070850 is a reply to message #1070822]

Thu, 18 July 2013 16:22

Eclipse User

Phil,

The only way in the core framework is to define a constraint:

http://help.eclipse.org/kepler/index.jsp?topic=/org.eclipse.emf.doc/references/overview/EMF.Validation.html

This case could be handled as an invariant that tests that at most one
of the two features is non-null. Or it could be done as a named
constraint on the Remove EClass that tests the same thing.

On 18/07/2013 9:00 PM, Phil H wrote:
> Hi,
>
> what's the best way to realize a UML XOR constraint with EMF. The following model gives you an idea what I mean:
>
>
>
> Cheers,
> Phil

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