I would say it's a bug (have you tried in 2.8, maybe it's fixed?).
I'd also say one should try to keep JSNI as small as possible; your method
could be rewritten as:
public static void doSomethingWithMarker() {
nativeDoSomethingWithMarker(SPECIAL_MARKER);
}
private static native void nativeDoSomethingWithMarker(String cm) /*-{
$wnd.alert(cm);
}-*/;
In legacy devmode, JSNI boundaries used to be a performance issue, but this
is no longer the case with SuperDevMode, so there's no reason to write big
JSNI methods (or even JSNI at all: use JsInterop; there are still a few
cases that need JSNI, but one can do almost everything with JsInterop
nowadays).
On Friday, January 27, 2017 at 11:23:35 AM UTC+1, Norbert Bartels wrote:
>
> Hi all,
>
> during development I ran into a problem and I had to dig a bit deeper to
> find the root cause. Perhaps someone can explain why this happens.
>
> I use GWT 2.7. And I have a class with some constants. For example
> something like this:
>
> public class MyConstants {
>
> public static final String SPECIAL_MARKER = "marker";
>
> }
>
> Now I try to use this in a JSNI method in another class, for example in
> this way:
>
> ...
> public static native void doSomethingWithMarker() /*-{
> var cm = @my.package.MyConstants::SPECIAL_MARKER
> $wnd.alert(cm);
> }-*/;
>
> ...
>
> In classic dev mode and in the compiled version this is working. In
> SuperDevMode cm is undefined.
>
> Now, I remove the final and voila, it even works in SuperDevMode.
> So obviously the final is a problem. But why is it working in classic and
> compiled mode? Is this simply a bug or is there a better way to use such
> constants?
>
> Cheers,
> Norbert
>
>
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