[news.eclipse.modeling.tmf] Re: How to assign an Object attribute an Int

[Knut Wannheden <knut.wannheden@xxxxxxxxxx>]

Hi Michael,

Michael Scharf wrote:
> Hi,
>
> I have a given EMF model that uses java.lang.Object to represent a
> value.
>
>   class Value {
>       attr Object value;
>   }
>
> I want to convert the value to Integer or String (or Double etc).
> This does not work:
>
>   Value returns my::Value:
>     value=INT | value= STRING;
>
> The I thought maybe I use a data type rule:
>
>   LiteralInteger returns ecore::EIntegerObject:
>     INT;
>   LiteralString returns ecore::EString:
>     STRING;
>
>   Value returns my::Value:
>     value=LiteralInteger | value= LiteralString;

You were on the right track. You should declare your rules as follows:

Value:
	value=MyInt | value=MyString;
	
MyInt returns ecore::EJavaObject:
	INT;

MyString returns ecore::EJavaObject:
	STRING;

No you just need to define value converters for the datatype rules MyInt and 
MyValue.

Hope that helps,

--knut