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[ATL] asSequence(): RegularVM vs EMF-VM [message #645538]

Fri, 17 December 2010 17:42

Alvaro Jimenez Rielo

Messages: 41
Registered: July 2009
Location: Rey Juan Carlos Universit...

Member

Hello,

I have this code:

self.source.asSequence()->first().oclIsUndefined()

for different Metaclasses that its 'source' attribute is 1..1 or 1..N (It depends on the metaclass). Using "asSequence()" in RegularVM, the code works for all metaclasses. But in EMF-VM, I receive this error:

org.eclipse.m2m.atl.engine.emfvm.VMException: Operation not found: IN!Member.asSequence()

because 'source' attribute in Member Metaclass is 1..1.

so, my question is: are there any possibility to convert 'source' to a collection type using EMF-VM?

Thanks for advance,
Alvaro.

[Updated on: Fri, 17 December 2010 17:43]

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Re: [ATL] asSequence(): RegularVM vs EMF-VM [message #645924 is a reply to message #645538]

Tue, 21 December 2010 08:38

Vincent MAHE

Messages: 129
Registered: July 2009

Senior Member

Le 17/12/2010 18:42, ajimenezr a écrit :
> Hello,
>
> I have this code:
> self.source.asSequence()->first().oclIsUndefined() for different
> Metaclasses that its 'source' attribute is 1..1 or 1..N (It depends on
> the metaclass). Using "asSequence()" in RegularVM, the code works for
> all metaclasses. But in EMF-VM, I receive this error:
> org.eclipse.m2m.atl.engine.emfvm.VMException: Operation not found:
> IN!Member.asSequence() because 'source' attribute in Member Metaclass is
> 1..1.
>
> so, my question is: are there any possibility to convert 'source' to a
> collection type using EMF-VM?

Some "facilities" of the old VM were more bugs than features. The recent
one is more strict so it needs to expurge old "lazy" code which was
relying on these holes in the checker.

In your case, I recommend you test the status of the 'source' attribute
in an 'if' structure, which will also document better your transformation.
--
Cordialement

Vincent MAHÉ

Ingénieur Expert - Projet IDM++ - Équipe AtlanMod
École des Mines de Nantes
La Chantrerie - 4, rue Alfred Kastler
B.P. 20722 - F-44307 NANTES Cedex 3
Tel: (33)2 51 85 81 00

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Re: [ATL] asSequence(): RegularVM vs EMF-VM [message #646937 is a reply to message #645538]

Mon, 03 January 2011 09:54

Sylvain EVEILLARD

Messages: 556
Registered: July 2009

Senior Member

or you can do :

Sequence{self.source}->flatten()->first().oclIsUndefined()

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