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OCL expression [message #1196290]

Tue, 19 November 2013 10:44

dodo babab

Messages: 6
Registered: January 2013

Junior Member

Hi,

Please, can anyone help me with this problem.
I have to classes in my meta model, each of them has an attribute (e.g., trustorRole and trusteeRole) The date type (eTupe) for both is the enumeration class (e.e.g, serviceRequester, serviceProvider). I want to create and OCL expression which defines that the attribute name of these two classes should not be the same in the instance of the meta model. To be more clear, my meta model look like in the picture below.

Best Regards

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Re: OCL expression [message #1196499 is a reply to message #1196290]

Tue, 19 November 2013 12:53

Ed Willink

Messages: 4904
Registered: July 2009

Senior Member

Hi

My first reaction was to use reflection which the Pivot-based OCL
supports, although OMG OCL does not (yet).

However a cleaner solution may occur at the metalevel by applying the
UniqueAttributeNames stereotype to Actors.

context UniqueAttributeNames
inv AttributeNamesAreUnique: Property.allInstances()->select(type =
base_Class)->isUnique(name)

(The above is untested)

Regards

Ed Willink

On 19/11/2013 10:44, dodo babab wrote:
> Hi,
>
> Please, can anyone help me with this problem.
> I have to classes in my meta model, each of them has an attribute (e.g., trustorRole and trusteeRole) The date type (eTupe) for both is the enumeration class (e.e.g, serviceRequester, serviceProvider). I want to create and OCL expression which defines that the attribute name of these two classes should not be the same in the instance of the meta model. To be more clear, my meta model look like in the picture below.
>
> Best Regards

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Re: OCL expression [message #1197118 is a reply to message #1196499]

Tue, 19 November 2013 19:16

dodo babab

Messages: 6
Registered: January 2013

Junior Member

Hi,

Thanks a lot for your answer, but I couldn't solve the problem.
Pleaseeee, if you have time can you have a look in my meta model.
Or, do you have any other idea. I need this result for my master thesis.

Thanks again. Regards
Dorina

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[Updated on: Tue, 19 November 2013 21:01]

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Re: OCL expression [message #1197313 is a reply to message #1197118]

Tue, 19 November 2013 21:25

Ed Willink

Messages: 4904
Registered: July 2009

Senior Member

Hi

Sorry. "I need this result for my master thesis." guarantees that I will
not help. Your thesis should represent your own work and research.

Regards

Ed Willink

On 19/11/2013 19:16, dodo babab wrote:
> Hi,
>
>
> Thanks a lot for your answer, but I couldn't solve the problem.
> Pleaseeee, if you have time can you have a look in my meta model.
> Or, do you have any other idea. I need this result for my master thesis.
>
> Thanks again. Regards
> Dorina
>
>

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Re: OCL expression [message #1198155 is a reply to message #1196290]

Wed, 20 November 2013 07:07

dodo babab

Messages: 6
Registered: January 2013

Junior Member

Thanks for your answer. The fact that I need this for my thesis doesn't implies that I will don't understand it. Becaouse I have to explain it and not just only create it in the meta model. It is better to say that I don't want to help you or I don't know how to do it (the truth).

Regards

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