If you are passing Resolver<T> into some function. You could instead
create 3 Resolver interfaces and then overload the function so that it took
each of the resolver interfaces.
On Saturday, August 27, 2016 at 9:51:50 AM UTC-4, Arnaud TOURNIER wrote:
>
> Hi,
>
> I am playing with js Promises and maybe there's a problem with JsInterop
> or i don't understand something.
>
> When wrapping the promises with JsInterop, i come to define the Resolver
> interface which represents the resolving callback that is given when
> constructing a promise. In Javascript it is a function and not an object,
> so the interface has the @JsFunction annotation.
>
> Here is the Resolver interface (inspired from the TypeScript definition of
> Promises...) :
>
> @JsFunction
> @FunctionalInterface
> public interface Resolver<T>
> {
> void resolve( T value );
> }
>
> Since the Javascript "resolve" function can be called without parameters
> and also with a Promise instead of a value, i would like to make those
> versions available in the interface.
>
> But the @JsFunction annotation prevents from having this :
>
> @JsFunction
> public interface Resolver<T>
> {
> void resolve();
>
> void resolve( T value );
>
> void resolve( Promise<T> value );
> }
>
> That's because it allows only one method in the annotated interface.
>
> That is what i don't understand : AFAIK, the gwt compiler has to call the
> same function in the same way for the three declared methods (because of
> the semantic of the @JsFunction annotation), just changing the calling
> parameters. So i don't understand why is there the limitation of having
> only one method allowed in @JsFunction interfaces... If it would it would
> give even much power to JsInterop !
>
> Could you please bring light to my misunderstanding ?
>
> Thanks !
>
> Arnaud
>
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