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[Acceleo] How to iterate through the global UML model from inside a template [message #1051528]

Sun, 28 April 2013 19:26

Spider 3000
Messages: 1
Registered: April 2013

Junior Member

Hi!

I have a simple starting template, like this:

[template public main(aClass : Class)]
[comment @main/]
[aClass.generate()/]
[/template]

Now in the method generate() I want to also iterate through all the objects of the type "Comment" (and not just the ones linked to aClass). How would I do that?

Thank you very much for any help!

[Updated on: Mon, 29 April 2013 19:24]

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Re: [Acceleo] How to iterate through the global UML model from inside a template question [message #1052184 is a reply to message #1051528]

Mon, 29 April 2013 15:01

Ed Willink
Messages: 3191
Registered: July 2009

Senior Member

Hi

That's what allInstances() allows you to do, if you're foolish enough
not to identify a much much more efficient algorithm.

Regards

Ed Willink

On 29/04/2013 03:53, Spider 3000 wrote:
> Hi!
>
> I have a simple starting template, like this:
>
> [template public main(aClass : Class)]
> [comment @main/]
> [aClass.generate()/]
> [/template]
>
> Now in the method generate() I want to also iterate through all the
> objects of the type "Comment" (and not just the ones linked to
> aClass). How would I do that?
>
>
> Thanks you very much for any help!

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Re: [Acceleo] How to iterate through the global UML model from inside a template question [message #1053421 is a reply to message #1052184]

Sun, 05 May 2013 06:17

Mathias Colpaert
Messages: 13
Registered: November 2012

Junior Member

Another classy reply from Ed.

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Re: [Acceleo] How to iterate through the global UML model from inside a template question [message #1058264 is a reply to message #1053421]

Mon, 13 May 2013 08:14

Stephane Begaudeau
Messages: 370
Registered: April 2010
Location: Nantes (France)

Senior Member

Hi,

If you want to iterate on all the elements with the type Comment in your UML model, you can do something like this:

[template public main (aModel : Model)]
[comment @main/]
[for (aComment : Comment | aModel.eAllContents(Comment))]
// do something
[/for]
[/template]

You should use the root of the UML model (Model) as the entry point of your generator instead of class. If you really need to start from a class, you can use something like:

[myClass.ancestors(Model)->first()/]

You can find an Acceleo-based UML to Java generator on Github if you want to have a look at a complex Acceleo generator (it is open source). You can find some information about this generator on my blog here and there.

Regards,

Stephane Begaudeau, Obeo

--
Twitter: @sbegaudeau
Google+: +stephane.begaudeau
Blog: http://stephanebegaudeau.tumblr.com | Eclipse Java Development Tools Tips and Tricks

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