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Wed, 15 February 2017 02:37

Eclipse User

Hi,

I want to know what is the equivalent of "OclAsType" in ATL?
I see in some transformation, select and oclIsKindOf are used.
In the figure below, I wanna to access "name" attribute of "SubSubElement" class.

index.php/fa/28471/0/

when I write the below code I have an error. What can I do?

s : MM!Exp
.
.
.
class <- s.ref.oclIsKindOf(MM!SubElement).oclIsKindOf(MM!SubSubElement).name

Attachment: sub.JPG
(Size: 17.20KB, Downloaded 500 times)

[Updated on: Wed, 15 February 2017 02:42] by Moderator

Re: "oclAsType" in ATL [message #1754236 is a reply to message #1754190]

Wed, 15 February 2017 10:52

Eclipse User

Hi

Try using oclAsType rather than oclIsKIndOf twice.

Regards

Ed Willink

Re: "oclAsType" in ATL [message #1754237 is a reply to message #1754236]

Wed, 15 February 2017 11:02

Eclipse User

Thanks for your response,
The operation oclAsType() defined by OCL are currently not supported by the ATL engine [1].

[1] https://wiki.eclipse.org/ATL/User_Guide_-_The_ATL_Language

Re: "oclAsType" in ATL [message #1754253 is a reply to message #1754237]

Wed, 15 February 2017 12:44

Eclipse User

Hi

Ow! The operations oclIsNew() and oclAsType() defined by OCL are currently not supported by the ATL engine.

Omitting oclIsNew() is very understandable, it is very hard and very costly to support and I've yet to want to use it. Omitting oclAsType() is very unfortunate. It is very useful and very easy to implement. I see no Bugzilla requesting it.

I guess that the justification is that a declaration transformation language does pattern matching and so assignments do oclAsType automatically or fail.

Regards

Ed Willink

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