/**
* Given an elevator request, this algorithm attempts to assign the request to a specific
* elevator. This algorithm differs in that it will try to assign the request to an IDLE elevator
* first. If there is no IDLE elevator, it will try to find an ACTIVE elevator to take the
* request. If there is neither an IDLE or ACTIVE elevator to take the request, it gets added to
* the pending requests lists. This algorithm's attempt at better elevator efficiency exists in
* getting all elevators to participate as fast as possible, instead of having only a few
* elevators do all the work and slowly making IDLE elevators join the workload
*
* @throws IllegalArgumentException if EController is given bad parameters
*/
public void processCallBoxRequest(ERequest request) throws IllegalArgumentException {
short dest = request.getFloorNum();
boolean direction = request.getDirection();
// checks if there's already an elevator headed to that floor
for (short i = 0; i < EController.getInstance().myElevators.size(); i++) {
if (EController.getInstance().myElevators.get(i).isInDestinations(dest)) {
if (EController.getInstance().myElevators.get(i).isCurrentDirectionUp() == direction) {
// return since there's already an elevator on its way
return;
}
}
}
// checks if there's an IDLE elevator that can take the request
for (short i = 0; i < EController.getInstance().myElevators.size(); i++) {
if (EController.getInstance().myElevators.get(i).getState() == 0
&& EController.getInstance().myElevators.get(i).takeRequest(dest, direction)) {
EController.getInstance().myElevators.get(i).addDestination(dest);
return;
}
}
/* If there's not already an elevator on the way to this destination floor,
* and there's no IDLE elevator available, then check if there's an available
* ACTIVE elevator that can take the request.
*/
for (short i = 0; i < EController.getInstance().myElevators.size(); i++) {
if (EController.getInstance().myElevators.get(i).takeRequest(dest, direction)
&& (EController.getInstance().myElevators.get(i).getState() == 2
|| EController.getInstance().myElevators.get(i).getState() == 3)) {
EController.getInstance().myElevators.get(i).addDestination(dest);
return;
}
}
// if none of the elevators could accept the request, add it to the pending list
EController.getInstance().pendingRequests.add(request);
}
@Test
public void test() {
ERequest e = new ERequest((short) 5, true);
assertTrue(e.getDirection());
assertEquals(e.getFloorNum(), (short) 5);
}