We hit the problem while creating our libraries.
Extending JavaScriptObject directly is not good because it restricts what
your possibilities.
So we used composition instead, giving us more power.
So instead of
public class MyClass extends JavaScriptObject{
protected MyClass(){
}
}
maybe you should consider something like
public class MyClass{
protected JavaScriptObject nativePeer;
public MyClass(){
nativePeer = createNativeJsoObject();
}
}
The the public API of MyClass will delegate to the JSO.
this will give you a bit more work but the API will me more flexible and
your users will thank you :).
Cheers,
Alain
2012/9/6 Sebastián Gurin <[email protected]>
> Hi all. I'm writing a lot of GWT overlay types for my new project YUIGWT -
> http://code.google.com/p/yuigwt/. I'm creating a nice and rich java
> hierarchy of overlay types there.
>
> Today I discovered that it is not good to let overlay types (extends
> JavaScriptObject implement interfaces because it seems that for a certain
> interface, no more than one overlay type can implement its methods. The
> error in question is pasted below, but this arrises a big question for me:
>
> While I understand perfectly what the error means, I would really
> appreciate if somebody can explain me the reasons behind this nasty
> restriction ? ??
>
> [ERROR] [org.sgx.yuigwt.YuiGwtTestOnline] - Line 9: Only one
> JavaScriptObject type may implement the methods of an interface that
> declared methods. The interface (org.sgx.yuigwt.yui.yql.api.YQLQueryResult)
> is implemented by both (org.sgx.yuigwt.yui.yql.api.desc.DescResult) and
> (org.sgx.yuigwt.yui.yql.api.wheather.forecast.WheatherForecastResult)
>
> Thanks in advance.
>
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