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

   1 package businessLogic;
   2
   3 import java.util.Date;
   4
   5 import com.db4o.ObjectContainer;
   6 import com.db4o.ObjectSet;
   7
   8 import dataAccess.DB4oManager;
   9 import domain.Booking;
  10 import domain.RuralHouse;
  11 import exceptions.OfferCanNotBeBooked;
  12
  13
  14 public final class BookingManager {
  15
  16         private int bookingNumber = 0;
  17         dataAccess.DB4oManager dbMngr;
  18
  19         private static BookingManager theBookingManager;
  20
  21         public BookingManager() {
  22                 try {
  23                         this.dbMngr = DB4oManager.getInstance();
  24                 } catch (Exception e) {
  25                         e.printStackTrace();
  26                 }
  27         }
  28
  29         /**
  30          * This method returns the next Booking number
  31          *
  32          * @return the book number
  33          */
  34     public static int getNumber(){
  35                 ObjectContainer db=DB4oManager.getContainer();
  36         BookingManager b=getInstance();
  37         b.bookingNumber++;
  38         db.store(b);
  39         db.commit();
  40         return b.bookingNumber;
  41     }
  42
  43         /**
  44          * This method returns the instance of the BookingManager class
  45          *
  46          * @return the booking manager
  47          */
  48         public static BookingManager getInstance()  {
  49                 ObjectContainer db=DB4oManager.getContainer();
  50             BookingManager b = new BookingManager();
  51             ObjectSet<BookingManager> result = db.queryByExample(b);
  52             if (!result.hasNext()){
  53                 theBookingManager = new BookingManager();
  54                 db.store(theBookingManager);
  55                 db.commit();
  56             } else theBookingManager=(BookingManager)result.next();
  57                 return theBookingManager;
  58         }
  59
  60         /**
  61          * This method creates a book with a corresponding parameters
  62          *
  63          * @param First
  64          *            day, last day, house number and telephone
  65          * @return a book
  66          */
  67         public Booking createBooking(RuralHouse ruralHouse, Date firstDate, Date lastDate, String bookTelephoneNumber)
  68                         throws OfferCanNotBeBooked {
  69
  70                 return dbMngr.createBooking(ruralHouse,firstDate,lastDate,bookTelephoneNumber);
  71         }
  72
  73 }