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

   1 package businessLogic;
   2
   3 import java.rmi.RemoteException;
   4 import java.sql.Date;
   5
   6 import com.db4o.ObjectContainer;
   7 import com.db4o.ObjectSet;
   8
   9 import dataAccess.DB4oManager;
  10 import domain.Booking;
  11 import domain.Offer;
  12 import domain.RuralHouse;
  13 import exceptions.BadDates;
  14 import exceptions.OfferCanNotBeBooked;
  15 import exceptions.OverlappingOfferExists;
  16
  17 public final class OfferManager {
  18
  19         private int offerNumber = 0;
  20         dataAccess.DB4oManager dbMngr;
  21         private static OfferManager theOfferManager;
  22
  23         public OfferManager() {
  24                 try {
  25                         this.dbMngr = DB4oManager.getInstance();
  26                 } catch (Exception e) {
  27                         e.printStackTrace();
  28                 }
  29         }
  30
  31         public static int getNumber() {
  32                 ObjectContainer db=DB4oManager.getContainer();
  33                 OfferManager o=getInstance();
  34                 o.offerNumber++;
  35                 db.store(o);
  36                 db.commit();
  37                 return o.offerNumber;
  38         }
  39
  40         /**
  41          * This method returns the instance of the OfferManager class
  42          *
  43          * @return the offer manager
  44          */
  45         public static OfferManager getInstance()  {
  46                 ObjectContainer db=DB4oManager.getContainer();
  47                 OfferManager b = new OfferManager();
  48                 ObjectSet result = db.queryByExample(b);
  49                 if (!result.hasNext()){
  50                         theOfferManager = new OfferManager();
  51                         db.store(theOfferManager);
  52                         db.commit();
  53                 } else theOfferManager=(OfferManager)result.next();
  54                 return theOfferManager;
  55         }
  56
  57         /**
  58          * This method creates an offer with a house number, first day, last day and price
  59          *
  60          * @param House
  61          *            number, start day, last day and price
  62          * @return the created offer, or null, or an exception
  63          */
  64         public Offer createOffer(RuralHouse ruralHouse, Date firstDay, Date lastDay,
  65                         float price) throws OverlappingOfferExists, BadDates, RemoteException, Exception {
  66                 if (firstDay.compareTo(lastDay)>=0) throw new BadDates();
  67
  68                 boolean b = dbMngr.existsOverlappingOffer(ruralHouse,firstDay,lastDay); // The ruralHouse object in the client may not be updated
  69                 if (!b) return dbMngr.createOffer(ruralHouse,firstDay,lastDay,price);
  70                 return null;
  71         }
  72
  73
  74 }