Register View in Navigator using instances or classes?

Vaadin 6 / 7 / 8
1

Hi,
what is a best practice to use Navigator in Vaadin7:

  1. navigator.addView(“name”, viewInstance);
    or
  2. navigator.addView(“name”, View.class);

Which one is preferred? Are there any pros or cons to use one instead of other?

Thanks,
Vladimir

2

If your View is stateful, then you should use the viewInstance in the navigator.

If your View don´t have a state than you can use the .class.

When using the class-Method, there is a ClassBasedViewProvider in use.
And on every getView-call there is a new instance of your view created.

When using the instance-method, there´s always your instance returned.

It depends on your requirements what to use.
I prefer using my own ViewProvider which delivers instances.