a Navigation Handler
The navigation-handler element contains the fully qualified class
name of the concrete NavigationHandler implementation class that is
called during the Invoke Application phase of the request processing
lifecycle, if the default ActionListener, which is provided by the
JavaServer Faces (JSF) implementation, is used.
To add a navigation handler:
Select faces-config.xml in the Project Explorer of the J2EE perspective.
The JSF Application Configuration editor opens.
Select the Other tab of the editor.
The Other page appears.
Expand the Navigation Handler
The Find Type dialog box appears.
Type the first letter of the type you want to use in the Select a type field.
A list of available types beginning with the letter you typed
appears in the Matching types list.
Select the type that you want to use and click OK.
The navigation handler is added to the list.