On Sunday, June 25, 2017 at 1:24:40 PM UTC+2, Vassilis Virvilis wrote: > > Ηι, > > thanks for answering > > d3.ordinal does not exist as you said. However d3.scale.ordinal exists and > that part works great. >
But it is not a type, so you cannot use 'instanceof' on it. > in d3 ordinal is both a function ordinal() which returns an ordinal > instance and an object with more methods such as range() which is the crux > of my issue. > > The problem there is that > > - public native <I, O> O range(I[] values); *// this doesn't > work* > - // public native <I> Ordinal range(I[] values); *// this works* > > I would like to use the first definition because it allows reusing some > code between different scales. Otherwise I have to copy-paste the range() > method multiple times instead of put it in a base class. > In Java, generics are more or less syntactic sugar for using the erased type and casting values. So when using the first one, GWT will, when used with O==Ordinal, generate a cast from Object to Ordinal, which IIUC is what's causing the error, because your JsType is not a type that can be checked (a cast is translated in JS to a type-check using 'instanceof'). > The problem is on the exceptions generated by the attempting casting. > > As you said this may not be a bug but not for the reason you mentioned. > > So the question remains: Should I report it as an issue? > I would say no. Your @JsType is wrong. You should either use an interface with @JsType(isNative=true, name="?", namespace=JsPackage.GLOBAL), or if you want to use fields use a class with @JsType(isNative=true, name="Object", namespace=JsPackage.GLOBAL) -- You received this message because you are subscribed to the Google Groups "GWT Contributors" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/google-web-toolkit-contributors/6206fb29-d3c1-48de-ab04-0610cbb3c2bd%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
