|A listener interface for preprocessing and receiving MIDP events.
Each system that wants to receive events implements an EventListener and
registers the listener with the EventQueue for each event type to be
received. Registration will require a system issued security token to
prevent unauthorized registrations, to get this token the system will
implement a static method to be called at VM startup. The EventListener
interface has methods for pre-processing
an event and receiving an event. The pre-processing method gets
called in the Java thread that is inserting an event when the event is the
type that it was registered for with a reference to the event to inserted
and the previously inserted event (if there is one). If the pre-processing
method merges the events and does not want does not want the new event
inserted into the queue, then it will return false. The receiving method
gets called in the event delivery thread with the first event of the type
of it registered for in the queue.