[news.eclipse.modeling.mdt.uml2tools] Re: genmodel for state machine dia

["Tas Frangoullides" <tfrangoullides@xxxxxxxxxxxxxxxxxx>]

Eban,

UML2 is implemented as instance of an ecore model, so you can instanciate 
and manipulate it using the UML2 API. It's API is not as easy to understand 
and EMF but that's just the way the UMl2 Spec is. You mgiht find the OMG 
specification useful as the UML2 API is pretty much a mirror of it plus some 
convenience methods.

You can do soemting allong the lines of

import org.eclipse.uml2.uml.Class;
import org.eclipse.uml2.uml.Model;
import org.eclipse.uml2.uml.NamedElement;
import org.eclipse.uml2.uml.UMLFactory;
import org.eclipse.uml2.uml.UMLPackage;

....

Model model = UMLFactory.eINSTANCE.createModel();
 Class personClass = model.createOwnedClass("Person", false);
 Class addressClass = model.createOwnedClass("Address", false);
 personClass.createOwnedAttribute("address", addressClass);

 for (NamedElement namedElement: model.getOwnedMembers()) {
  if (UMLPackage.Literals.CLASS.equals(namedElement.eClass())) {
   Class umlClass = (Class) namedElement;
   System.out.println(umlClass.getName());
  }
 }


In terms of going from a UML Statemachine I would approach it in a number of 
steps which make it easier to build and test your generators

1. Using EMF define a simple StateMachine meta-model that describes the 
semantics you are really interested in.
2. Develop a generators for generating code from  instances of this simple 
meta-model
3. Develop a transformation from UML2 StateMachine to your own StateMachine

To achieve step 2 you may find transforming to an ecore model and 
customising the emf code generation tamplates helpful
The pure "modeling" approach to the transformations would be to use a proper 
model transformation language but I have also found SwithUtil classes 
pragmatic and easy to test.

Hope that helps,
Tas


"Eban Escott" <eban.escott@xxxxxxxxxxxxxxxx> wrote in message 
news:1db3d97061ef7dcbb69e6494d701ad4a$1@xxxxxxxxxxxxxxxxxx
> Hey Tas, thanks for the heads up. I am trying to do some reflective 
> programming on a ecore model, or as it turns out now on a uml2 model? So, 
> i have been reading the EMF, 2nd edition book and I have got this working 
> on an ecore model fine:
>
> InputCPackage inputCPackage = InputCPackage.eINSTANCE;
> System.out.println(inputCPackage);
> classifiers = inputCPackage.getEClassifiers();
> for(EClassifier classifier: classifiers) {
> System.out.println(classifier);
> }
> And from here I can reflectively traverse a meta-model combine that with 
> JET and out pops some code ... sweet. Having a guess, is this how 
> generators work?
>
> Now, I want to do something similar again but on a state machine not a 
> class diagram. I have tried converting to ecore as you know but ran into 
> problems. How can I use reflection on a UML2 model?
>
> Thanks, Eban