[news.eclipse.modeling.gmt] Re: [Epsilon]EWL finding EClass

[Dimitrios Kolovos <dskolovos@xxxxxxxxx>]

Hi Kimon,

See comments inline

Kimon Polychroniadis wrote:
> Hello,
>
> I am trying to find the type of a model element in one of my wizards. 
> For example, I want the wizard to find the type of an element "A" and 
> print it. Could you please inform me on (EOL,I suppose) the function used?

you can use the EMF .eClass() method which returns the respective ECore 
EClass.

> Moreover, could you please tell me how I can find whether a reference of 
> a model element is null. For example, how I can find whether 
> A.relationToB returns null (supposing that B is not assigned to the 
> 'relationToB' reference defined in the model)?

You can check for null using the isDefined() operation. i.e. 
A.relationToB.isDefined()
> I was quite happy to get my hands on the EpsilonBook but I didn't find 
> anything related to that. I apologize for the size of the message.

The book is accessible through the documentation page 
(www.eclipse.org/gmt/epsilon/doc). (direct link 
http://epsilonlabs.svn.sourceforge.net/svnroot/epsilonlabs/org.eclipse.epsilon.book/EpsilonBook.pdf)

> Thank you in advance,
> Kimon

Cheers,
Dimitris