@Override
	@Transactional(readOnly = true)
	public Set<Location> getAllLocationDescendants(Location location, Set<Location> descendants) {
		if (descendants == null)
			descendants = new HashSet<Location>();

		if (location != null) {
			Set<Location> childLocations = location.getChildLocations();
			for (Location childLocation : childLocations) {
				descendants.add(childLocation);
				getAllLocationDescendants(childLocation, descendants);
			}
		}

		return descendants;
	}

	@Override
	@Transactional(readOnly = true)
	public List<Appointment> getAppointmentsByConstraints(Date fromDate, Date toDate, Location location, Provider provider,
	        AppointmentType type, String status) throws APIException {

		List<Appointment> appointments = appointmentDAO.getAppointmentsByConstraints(fromDate, toDate, provider, type,
		    status);

		List<Appointment> appointmentsInLocation = new LinkedList<Appointment>();

		Set<Location> relevantLocations = getAllLocationDescendants(location, null);
		relevantLocations.add(location);

		for (Appointment appointment : appointments) {
			boolean satisfyingConstraints = true;

			//Filter by location
			if (location != null) {
				if (relevantLocations.contains(appointment.getTimeSlot().getAppointmentBlock().getLocation()))
					appointmentsInLocation.add(appointment);
			} else
				appointmentsInLocation.add(appointment);

		}

		return appointmentsInLocation;

	}