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

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