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Generic Enumeration Literal [message #1783968]

Tue, 20 March 2018 19:44

John Dziurlaj

Messages: 1
Registered: March 2018

Junior Member

I have a number of UML classes that share a similar structure. An enumeration "X" has a number of values, including X::other. When a class instance has X::other for this attribute, then another attribute, OtherType must be defined. The OCL constraint looks something like this:

self.Type = X::other implies not self.OtherType.oclIsUndefined()

This works well enough. However, each class has its own enumeration (of a different type) so the explicit referencing of a classifier will not work if I try to apply this rule to multiple elements. I tried something like:

self.Type = self.Type.oclType()::other implies not self.OtherType.oclIsUndefined()

but received an error regarding the use of ::

Is there a way to accomplish this?

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Re: Generic Enumeration Literal [message #1784116 is a reply to message #1783968]

Thu, 22 March 2018 16:03

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

Generic functionality generally requires reflection, which OMG OCL explicitly excludes although there are aspects of the specification that require it.

The Pivot-based Eclipse OCL used within Payprus supports reflection. oclType() returns an OCL::Class which is pretty similar to a UML::Class except that property names are rationalized, so something like (untested) oclType().oclAsType(pivot::Enumeration).ownedLiterals->select(name='other') might help you. (The cast to Enumeration should probably be unnecessary._

Regards

Ed Willink

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