We have an XSD that has a numerous amount of properties that need to
be set. We have placed all those properties on the browser, so when
the user submits those values I want to plug those properties into the
jaxb object. So instead of coding a bunch of setXXX, I wanted to do
in such a way that if the xsd changed all I have to do is change the
GUI and give that gwt gui object a name that maps directly to the xsd.
So the xsd has UserName
The gui will have a g:Textbox name="UserName"
Then in the code I would call the reflective method.
As I typed this I guess regardless there would be no way to do this on
the client side. So now I am thinking that I could just send the
widget to the server and the server could do all the reflection it
needs.
Pseudocode for the server side
String someMethodCalledAsync(Widget t){
for ( Node n : t.getElement().getChildNodes() ){
if ( n )//do reflection to see if this object has a getName
method. if so we can use it and do an easy map to the jaxb object.
}
}
On Apr 29, 10:08 am, Sripathi Krishnan <[email protected]>
wrote:
> GWT doesn't support reflection or dynamic method invocation for performance
> reasons. It has to know at compile time what method you want to invoke, so
> that it can eliminate methods that it knows aren't being called.
>
> If you describe your use-case, perhaps someone could help you with a
> workaround.
>
> --Sri
>
> On 29 April 2010 19:20, Arinté <[email protected]> wrote:
>
>
>
> > I want to be able to call a method on a object dynamically. As in:
> > Method m = obj.getClass().getMethod(...);
> > m.invoke(...);
>
> > How would I do this on the client-side in GWT. I was trying to do
> > this:
>
> > reflectiveSet(trunk.getSettings().getCustName(), "value", "grumpy");
>
> > private native void reflectiveSet(Object obj, String property,
> > String value)/*-{
> > alert('o' +obj);
> > alert('p' +property);
> > alert('v' +value);
> > obj[property] = value;
> > }-*/;
>
> > but that doesn't work, I get this error:
>
> > com.google.gwt.core.client.JavaScriptException: (null): null
> > at
>
> > com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
> > 195)
>
> > Would this work if I were to actually deploy the war file?
>
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