@DataModel confused over name...

[henrik.lindberg]

I am using a @DataModel annotation for a variable like this:

@DataModel("availableCars")
private List<Car> m_availableCars;

and I have a factory model

@Factory("availableCars")
public void findCars()
 //...

When I use this combination, the <h:dataTable> picks up the value ok, but when I use regular EL statments like:

<h:outputText value="There are no cars to display" rendered="#{empty availableCars}"/>

The text does not get rendered even when the factory method creates an empty List.

After some testing, I notived that the Debug ouput page showed the bound variable m_availableCars, and not as I expected availableCars

[henrik.lindberg]

(Sorry, hit submit instead of preview)...

[henrik.lindberg]

I learned that using "empty" does not work here since the List is wrapped in a ListDataModel, and I need to use rowCount on that instead to test for empty.

But something weird was still going on. In the debugger window I could see my variable m_availableCars and listed as being an Array - i.e. showing two empty brackets.

Changing the name (i.e. removing m_) got my code working.

But so, I thought. After restarting JBoss I could not reproduce the problem, and switching back to the "m_" notation worked.

So - problem is solved.