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counting the number of occurences ofan eReference in an ATL transformation [message #1834966]

Sun, 22 November 2020 14:57

nour nour

Messages: 19
Registered: April 2020

Junior Member

Hello everyone,

I have an ATL model, which transforms a source model "S" into a target model "T" (both are ecore models).
I have two eReferences called "InputParam" and "OutputParam" in the source model "S", which both relate "process" eClass to "parameter" eClass.

what I need is:
Count the total number of occurrences of "InputParam" + "OutputParam" eReferences in the source XMI model at runtime so I can decide:

if ( the total number of occurrences >1 ) then
the "process" eClass is transformed into an "Activity" eClass in the target model T
else
the "process" eClass is transformed into a "subActivity" eClass in the target model T
endif

I tried using ocl functions count(), AllInstances() as well as size(), however, none of them seems to work, as I get an error which implies that it can not iterate on the eRefernces that I indicated.

Can anyone tell me the right ocl function to use and how?
Regards.

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Re: counting the number of occurences ofan eReference in an ATL transformation [message #1834972 is a reply to message #1834966]

Sun, 22 November 2020 15:36

Dennis Wagelaar

Messages: 581
Registered: September 2012
Location: Belgium

Senior Member

You can count the total number of EReferences named "InputParam" like so (assuming you've named your Ecore metamodel "ECORE" in your ATL file):

ECORE!EReference.allInstances()->select(r | r.name = 'InputParam')->size()

Cheers,
Dennis

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