// If there is only one parameter, and it is RequestCycle
if (parameters.length == 1 && parameters[0] == RequestCycle.class)
{
// Save this interface method by the non-qualified class name
listenerInterfaceMethods.put(Classes.name(c), methods[i]);
// Done!
return;
}
// Failed to find interface method
throw new IllegalArgumentException("Internal error: " + c
+ " does not have a method that takes RequestCycle as a parameter");
as you can see from the code, only interfaces with one parameter being request cycle are accepted.
Now, DropDownChoice does this:
RequestCycle.registerListenerInterface(IOnChangeListener.class);
and has template method:
/**
* called when a selection changed.
* @param cycle the request cycle
*/
public final void selectionChanged(RequestCycle cycle)
{
Object value = internalUpdateModel(cycle);
selectionChanged(cycle, value);
}When clients override DropDownChoice, *and* implement IOnChangeListener, the interface method will be called, and thus the template method with the two arguments.
So, it is used. But because you use introspection to check/ call interfaces, your IDE can't know about the dependencies.
I'm reversing the change as my projects don't work now.
Eelco
Eelco Hillenius wrote:
Sorry about not responding. Hmmm... I'm not sure why that's in there. Must be garbage; go ahead pls.
Eelco
Jonathan Locke wrote:
if nobody responds to this, i'm just going to remove it.
Jonathan Locke wrote:
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