AjaxFormSubmitBehavior throws an NullPointerException when the getForm() is overridden

[zoltan luspai]

Hi,

I have an AjaxFormSubmitBehavior where I don't pass the form parameter 
in the constructor, but have overridden the getForm() method to find the 
related form. (The form is not parent of the button this behavior is 
attached to, so can not be found by the behavior itself).


When I "click" on the button attached, the form is submitted nicely, but 
after the onSubmit call I get this exception:


java.lang.NullPointerException

   at 
org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:142)
   at 
org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:166)
   at 
org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:299)
   at 
org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:113)
   at 
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
   at 
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1240)
   at org.apache.wicket.RequestCycle.step(RequestCycle.java:1319)


Having a look at the source it seems there is a but at this line in 
AjaxFormSubmitBehavior:


   @Override
   protected void onEvent(AjaxRequestTarget target)
   {
       ...
       if (form.findParent(Page.class) != null)
       ...
   }

I think that should be :
   ... getForm().findParent(Page.class)


unless, there is a good reason not to be so?

Btw; I am using wicket version 1.4rc4.


Cheers

Zoltan