modify the code generated from def create method

[nguyenvi...@gmail.com]

Hi, Is there any solution for modifying the code generated from the create method?. I would like to add some code to the generated method. I tried to use Active annotation but i cannot use active annotation for create methods, there is always the error "Cannot use inferred type as parameter type."

Thanks

[Sven Efftinge]

Could you outline what you want to achieve?

On 17 Feb 2015, at 11:01, nguyenvi...@gmail.com wrote:

Hi, Is there any solution for modifying the code generated from the create method?. I would like to add some code to the generated method. I tried to use Active annotation but i cannot use active annotation for create methods, there is always the error "Cannot use inferred type as parameter type."

Thanks

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[nguyenvi...@gmail.com]

Hi Sven Efftinge,

I woud like to access to the traces of the transformation ( the generated Maps is also considered the traces) after the transformation 's execution. However,
in the generated code, the traces of the transformation are stocked in private final Map ( for e.g, private final HashMap<ArrayList<?>, Model> _createCache_transform = CollectionLiterals.newHashMap(); )
So, i want to add a specific trace object of type TraceRegistry (the class that i create for the tracing purpose) to stock the traces of the transformation.

Thanks

[Nguyen Viet Hoa]

For example :

synchronized (_createCache_transform) {
      if (_createCache_transform.containsKey(_cacheKey)) {
        return _createCache_transform.get(_cacheKey);
      }
      Model _createModel = UMLFactory.eINSTANCE.createModel();
      _result = _createModel;
      _createCache_transform.put(_cacheKey, _result);
     
      traceRegistry.put(_cacheKey, _result);

[Franz Becker]

Hi,

it seems like you may want to write your own active annotation in order to customize the generated code.

Find more on this topic here: https://www.eclipse.org/xtend/documentation.html#activeAnnotations

This way you could also change the computation of the cache key, if that is needed (I had this use case once).

Best regards,

Franz

[Nguyen Viet Hoa]

Hi Franz,

      Thank you so much for your answer. I've tried many way to modify the generated code of the create method with active annotation, but there are always exceptions raised "java.util.ConcurrentModificationException". It seems like i cannot modify the method.body of the create method.

Could you please share the code snippet that you have succeed to change the computation of the cache key please?

Best Regard,

Hoa

[becker...@gmail.com]

Hi Hoa,

don't try to alter the behavior of create methods and apply your active annotation to a regular method and you should be fine.

For example:

@CustomCreate

def Z createZ(X x, Y y) {

  // ...

}

The you would program your active annotation in a way that it creates the same code as the built-in mechanism with the additional line of your trace registry.

Best regards,

Franz

PS: Sorry that I can't share the code snippet with you as this was not in an open source project.

[Nguyen Viet Hoa]

Hi Franz,
     
          Thank you so much for you response. In fact, i want to reuse the mecanism de create method, but i think we can not change the behavior of the create method. I will think about your solution (use regular methods with annotations).

Best Regards,

Hoa