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[Acceleo] Cast between two metamodels [message #529628]

Mon, 26 April 2010 11:11

Eclipse User

Hi everyone

I'm trying to generate code from two metamodels, MA and MB.
The problem I'm facing is the following:

I have a class B in MB, which inherits from class A in MA.

I'd like to access some attributes in B, while I'm browsing classes A and B, like a basic Cast in java
Unfortunately, oclAsType() method works fine while I'm using classes from the same Metamodel, not if I want to use it with A and B like :
a.oclAsType(B), I get "Unrecognized variable: (B)" in

[template public write(a : A)]
    [for (n : Node | a.children)]
        [if (n.oclIsKindOf(Attribute))]
             [n.oclAsType(B).write()/]
        [/if] 
     [/for]
[/template]

Is there another way I'm not aware of to do this? maybe not using OCL ?

Regards

Nicolas

Re: [Acceleo] Cast between two metamodels [message #529782 is a reply to message #529628]

Tue, 27 April 2010 04:24

Eclipse User

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Hi Nicolas,

I believe OCL is just confused between your metamodels. Would
"a.oclAsType(MB::B)" do the trick?

(I recently made some tweaks in Acceleo so that the use of qualified
names for types will be useless in most cases ... but these changes
haven't been built yet)

Laurent Goubet
Obeo

Nicolas Guyomar wrote:
> Hi everyone
>
> I'm trying to generate code from two metamodels, MA and MB.
> The problem I'm facing is the following:
>
> I have a class B in MB, which inherits from class A in MA.
>
> I'd like to access some attributes in B, while I'm browsing classes A
> and B, like a basic Cast in java
> Unfortunately, oclAsType() method works fine while I'm using classes
> from the same Metamodel, not if I want to use it with A and B like :
> a.oclAsType(B), I get "Unrecognized variable: (B)" in
>
> [template public write(a : A)]
> [for (n : Node | a.children)]
> [if (n.oclIsKindOf(Attribute))]
> [n.oclAsType(B).write()/]
> [/if] [/for]
> [/template]
>
>
> Is there another way I'm not aware of to do this? maybe not using OCL ?
>
> Regards
>
> Nicolas
>
>
>

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[Solved] [Acceleo] Cast between two metamodels [message #529799 is a reply to message #529782]

Tue, 27 April 2010 05:29

Eclipse User

Hi Laurent,

Thank you for your quick answer

The solution you proposed works perfectly, I assume this syntax is pretty common in OCL .. shame on me

Thank you again

Nicolas

Re: [Solved] [Acceleo] Cast between two metamodels [message #529832 is a reply to message #529799]

Tue, 27 April 2010 08:03

Eclipse User

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--------------040806090006080500040407
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Content-Transfer-Encoding: 7bit

Nicolas,

It is a common syntax in OCL ... but I doubt many people know all of the
different things we can do with OCL :p.

Laurent Goubet
Obeo

Nicolas Guyomar wrote:
> Hi Laurent,
>
> Thank you for your quick answer
>
> The solution you proposed works perfectly, I assume this syntax is
> pretty common in OCL .. shame on me
>
> Thank you again
>
> Nicolas
>
>

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Content-Transfer-Encoding: base64
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filename="laurent_goubet.vcf"

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--------------040806090006080500040407--

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