Javascript cannot deal with longs properly since the VM only speaks in terms
of doubles. Longs are emulated in GWT:
http://code.google.com/p/google-web-toolkit/source/browse/trunk/#trunk%2Fdev%2Fcore%2Fsuper%2Fcom%2Fgoogle%2Fgwt%2Flang
The reason this doesn't work is the compiler can only emulate the longs you
use in Java code. Once you drop to JSNI the compiler isn't touching your
code, and therefore it doesn't make any sense to have a JSNI method return a
long.
On Tue, May 24, 2011 at 5:17 AM, Eugen Paraschiv <hanrisel...@gmail.com>wrote:
> I'm having a problem with the conversion of a JSON to a JNI overlay type.
> The java code has to following method:
>
> long nr = 10l;
> public Long getNr() {
>
> return nr;
> }
>
> The JNI overlay type is:
>
> public final native Long getNr() /*-{
> return this.nr;
>
> }-*/;
>
> I'm avoiding operating with the long primitive in the overlay type, as the
> compiler doesn't allow it. The official documentation says that this is
> inefficient but it should work. However, I'm getting:
>
> java.lang.IllegalArgumentException: Something other than a Java object was
> returned from JSNI method
> '@com.avaya.thunder.portal.client.shared.model.Customer::getNr1()': JS value
> of type int, expected java.lang.Object
>
> at com.google.gwt.dev.shell.JsValueGlue.get(JsValueGlue.java:178)
>
> at
> com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:271)
>
> I'm using GWT 2.2.0.
>
> Is it something I'm doing wrong? Should this work? Any help is appreciated.
> Thanks.
>
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