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Conversion from oaw to tmf xtext - Problem with MetaModelRegistration [message #57688]

Mon, 13 July 2009 12:04

Eclipse User

Hi,

I try to convert an "old" oaw xtext project to tmf xtext.

In this project I work with dynamic EMF and use the generated class with
the name "MetaModelRegistration" for these purposes.

In the new generated stuff this class is not available anymore. I know I
could rewrite the java stuff based on the static EMF which is now
generated. But I would prefer to get an intermediate solution.

What can I do to handle this problem?
TIA

Martin

Re: Conversion from oaw to tmf xtext - Problem with MetaModelRegistration [message #57741 is a reply to message #57688]

Mon, 13 July 2009 14:37

Eclipse User

The generated classes all inherit from EObject, so there shouldn't be a
problem using the reflective EObject API.

The MetaModelRegistration just made sure that the EPackage was put into
the EPackage.Registry.INSTANCE in standalone mode.
This is now done by the generated <MyLanguage>Setup class.

Sorry, if I didn't understand your question.

Regards,
Sven

Martin Kuhn schrieb:
> Hi,
>
> I try to convert an "old" oaw xtext project to tmf xtext.
>
> In this project I work with dynamic EMF and use the generated class with
> the name "MetaModelRegistration" for these purposes.
>
> In the new generated stuff this class is not available anymore. I know I
> could rewrite the java stuff based on the static EMF which is now
> generated. But I would prefer to get an intermediate solution.
> What can I do to handle this problem?
> TIA
>
> Martin
>
>
>
>

Re: Conversion from oaw to tmf xtext - Problem with MetaModelRegistration [message #58561 is a reply to message #57741]

Tue, 14 July 2009 13:47

Eclipse User

Sven Efftinge wrote:

> The generated classes all inherit from EObject, so there shouldn't be a
> problem using the reflective EObject API.

> The MetaModelRegistration just made sure that the EPackage was put into
> the EPackage.Registry.INSTANCE in standalone mode.
> This is now done by the generated <MyLanguage>Setup class.

Thanks for answering. I think this problem is solved.

Until now, we used OAW xtext intensively but without having a deep
understanding of internas.

BUT I realized that the migration is not an easy task. And without a
deeper knowledge it is a little bit tricky to solve the problems. (I get
tons of errors).

E.g. we had the following definition in our grammar:
String DataType:("string"|"integer"|"long"|...|"collection");

And changed to
DataType:("string"|"integer"|"long"|...|"collection");

Now we are not able to do a switch case with string on DataType Ref's:

e.g. the following doesn't work anymore
boolean isStringType(EntityAttribute this) :
// this.type points to a DataType
switch (this.type) {
case "string": true
case "text": true
default: false
};

How can I solve this problem?

Is there a documentation how to solve this kind of (common??) problems?

TIA
Martin

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