reservationsystem/src/java/lodge/reservationsystem/AccountReservationList.java

package lodge.reservationsystem;

import java.util.ArrayList;

public class AccountReservationList extends ArrayList<Reservation> {

    private static String reservationSerial(Reservation reservation) {
        return String.format("R%010d", Math.abs(java.util.Objects.hash(reservation.physical_address)));
    }

    public boolean add(final Reservation reservation) {
        boolean result = true;
        try {
            result = reservation.checkValid();
        } catch (Exception e) {
            return false;
        }
        for (Reservation rsrv : this) {
            result = reservation.getReservation_number().compareTo(rsrv.getReservation_number()) == 0;
            if (result) {
                return false;
            }
        }
        reservation.setReservation_number(AccountReservationList.reservationSerial(reservation));
        return super.add(reservation);
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("\"reservation_list\":[");

        for (int ix = 0; ix < this.size(); ix++) {
            String name = this.get(ix).ReservationType() + "";

            if ((this.size() - 1) == ix) {
                sb.append(String.format("{\"%s\":{\"reservation_number\":\"%s\"}}", name,
                        this.get(ix).getReservation_number()));
            } else {
                sb.append(String.format("{\"%s\":{\"reservation_number\":\"%s\"}},", name,
                        this.get(ix).getReservation_number()));
            }
        }
        sb.append("]");
        return sb.toString();
    }

    public void update(AccountReservationList incoming_reservation_list) {
        for (Reservation rsrv : incoming_reservation_list) {
            Reservation onListRsrv = find(rsrv.getReservation_number());
            if( onListRsrv != null ){
                onListRsrv.update(rsrv);
            }
        }
    }

    public Reservation find(String reservation_number) {
       for(Reservation rsrv: this){
            if( rsrv.getReservation_number().compareTo(reservation_number) == 0 ){
                return rsrv;
            }
        }
        return null;
    }
}