Eclipse Community Forums: Epsilon » EVL: How to check the aggregation kind of an association end

Help

Home

Home » Modeling » Epsilon » EVL: How to check the aggregation kind of an association end

Show: Today's Messages :: Show Polls :: Message Navigator

EVL: How to check the aggregation kind of an association end [message #1717971]

Fri, 18 December 2015 10:59

Alireza Rouhi

Messages: 148
Registered: December 2015

Senior Member

Hi,

I want to check the aggregation kind of an association end with the following operation:

operation Association foo() : Boolean {
	for (end in self.memberEnds) {
		if (end.aggregation = 'shared')
			return true;
		}
		
		return false;
}

I used the

end.aggregation = Aggregation #a_shared

condition in the if statement earlier. The error message was Cannot find enumeration literal Aggregation#a_shared in model M! Thus, here I have replaced the

end.aggregation = 'shared'

in the if condition. Although, there is no error message for this code but it is not functional!
My question is that "How can I check the aggregation kind in the if statement?" (the possible values of the end.aggregation can be composite, none, or shared).

Kind regards,
Alireza

[Updated on: Fri, 18 December 2015 11:16]

Report message to a moderator

Re: EVL: How to check the aggregation kind of an association end [message #1717982 is a reply to message #1717971]

Fri, 18 December 2015 11:53

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Alireza,

There doesn't seem to be an Aggregation enumeration in the UML metamodel but there is one called AggregationKind (i.e. AggregationKind#shared should do the trick). You may find Epsilon's EPackage Registry View [1] useful for exploring the UML metamodel.

Cheers,
Dimitris

[1] https://www.eclipse.org/epsilon/doc/articles/epackage-registry-view/

Report message to a moderator