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"oclAsType" in ATL [message #1754190]

Wed, 15 February 2017 07:37

Banafsheh Azizi

Messages: 328
Registered: July 2016

Senior Member

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 409 times)

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http://mdse.ui.ac.ir

[Updated on: Wed, 15 February 2017 07:42]

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

Wed, 15 February 2017 15:52

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

Try using oclAsType rather than oclIsKIndOf twice.

Regards

Ed Willink

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

Wed, 15 February 2017 16:02

Banafsheh Azizi

Messages: 328
Registered: July 2016

Senior Member

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

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http://mdse.ui.ac.ir

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

Wed, 15 February 2017 17:44

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

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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