[gme-users] OCL constraint question

[Larry Howard]

Jared,

Seems like a trick question.

let jira=project.allInstancesOf(StartTestCase) in jira.isUnique 
( i:StartTestCase | i.name)

So perhaps the matter has to do with enforcement (or "checking".)  You  
can use the "on change property" event to check the constraint  
whenever a "StartTestCase" atom is renamed.  One consequence of this  
choice is that each atom must be given a unique name before the  
creation of the next, since all are created with the same name  
("StartTestCase").

If you want to force aborting a renaming operation on the constraint  
violation, you can change the constraint's Priority attribute to 1.

Hope that helps.

Regards,
lph
--
Larry Howard, Sr. Research Scientist
Institute for Software Integrated Systems, Vanderbilt University



On Sep 25, 2009, at 1:20 PM, Jared Crace wrote:

> Hi All,
>
> I have created an atom named "StartTestCase" that has an attribute  
> called "JiraItem".  I have written a constraint to verify that all  
> JiraItems must have a unique name.  The constraint I wrote was:
>
> let jira=project.allInstancesOf(StartTestCase) in jira.isUnique 
> ( i:StartTestCase | i.JiraItem)
>
> The constraint works just fine.  But I would also like to write  
> another constraint that makes sure the user renames the  
> "StartTestCase" atom to a unique name.  Could you please let me know  
> how to accomplish this?
>
> Thanks
>
> Jared Crace
> Pitney Bowes
> Software Engineer
> _______________________________________________
> gme-users mailing list
> gme-users at list.isis.vanderbilt.edu
> http://list.isis.vanderbilt.edu/mailman/listinfo/gme-users

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