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[EOL/EVL] Class references [message #1694097]

Thu, 30 April 2015 10:23

Eclipse User

Hi,
In my metamodel I specified a "Class" class and it has a "subClassOf" reference/association with itself. My problem is that I specified a constraint that avoids a class to be related by the subClassOf association with itself and I would like to write a fix that removes this specific association but I can't find anything that explains how to do that in EOL/EVL. Is it ever possible? I mean, is there available any operation in EOL that allows me to remove a specific association/reference? I was digging a while (and reading the Epsilon Book chapter about EOL) and I can't find anything for that

Regards

Re: [EOL/EVL] Class references [message #1694148 is a reply to message #1694097]

Thu, 30 April 2015 18:26

Eclipse User

Hi Alexandre,

If subClassOf is a multi-valued reference, self.subClassOf.remove(self) would do the trick. If subClassOf is single-valued, self.subClassOf = null would unset the reference. Does this help?

Cheers,
Dimitris

Re: [EOL/EVL] Class references [message #1694150 is a reply to message #1694148]

Thu, 30 April 2015 19:13

Eclipse User

Yes, it helps but there is one thing that isn't being replicated which is the possibility to remove the link from the generated editor.
My EMF looks like:

@gmf.node(label="uri", figure="ellipse", label.edit.pattern="{0}", label.view.pattern="<<Class>> {0}", label.icon="false")
class Class extends Resource {

  @gmf.link(target="subClassOf", target.decoration="arrow", label.text="subClassOf", label.readOnly="true")
  ref Class[*] subClassOf;
}

And when I do the fix with self.subClassOf.remove(self) the link isn't removed (although now the model now passes the validation). Is there any easy way to do that?

Regards

Re: [EOL/EVL] Class references [message #1694153 is a reply to message #1694150]

Thu, 30 April 2015 20:32

Eclipse User

Hi Alexandre,

If you refresh the diagram manually (F5?) does the link disappear?

Cheers,
Dimitris

Re: [EOL/EVL] Class references [message #1694155 is a reply to message #1694153]

Thu, 30 April 2015 20:48

Eclipse User

Yes it does Smile

Is it possible in some way to "force" the update of the model? Or is it necessary to refresh manually?

Regards

[Updated on: Thu, 30 April 2015 20:49] by Moderator

Re: [EOL/EVL] Class references [message #1694368 is a reply to message #1694155]

Mon, 04 May 2015 17:14

Eclipse User

Hi Alexandre,

This should work out of the box. Could you please share a minimal example [1] I can use to reproduce this locally?

Cheers,
Dimitris

[1] http://www.eclipse.org/epsilon/doc/articles/minimal-examples/

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