xp-dev.com Git - RRRRHHHH_Code/blob - ruralHouses/src/businessLogic/BookingManager.java

   1 package businessLogic;
   2
   3 import com.db4o.ObjectContainer;
   4 import com.db4o.ObjectSet;
   5
   6 import dataAccess.DB4oManager;
   7
   8
   9 public final class BookingManager {
  10
  11         private int bookingNumber = 0;
  12         dataAccess.DB4oManager dbMngr;
  13
  14         private static BookingManager theBookingManager;
  15
  16         private BookingManager() {}
  17
  18         /**
  19          * This method returns the next Booking number
  20          *
  21          * @return the book number
  22          */
  23     public static int getNumber(){
  24                 ObjectContainer db=DB4oManager.getContainer();
  25         BookingManager b=getInstance();
  26         b.bookingNumber++;
  27         db.store(b);
  28         db.commit();
  29         return b.bookingNumber;
  30     }
  31
  32         /**
  33          * This method returns the instance of the BookingManager class
  34          *
  35          * @return the booking manager
  36          */
  37         public static BookingManager getInstance()  {
  38                 ObjectContainer db=DB4oManager.getContainer();
  39             BookingManager b = new BookingManager();
  40             ObjectSet result = db.queryByExample(b);
  41             if (!result.hasNext()){
  42                 theBookingManager = new BookingManager();
  43                 db.store(theBookingManager);
  44                 db.commit();
  45             } else theBookingManager=(BookingManager)result.next();
  46                 return theBookingManager;
  47         }
  48
  49 }