cleaning
[RRRRHHHH_Code] / ruralHouses / src / dataAccess / DB4oManager.java
index 45f847c..baab98a 100644 (file)
@@ -3,175 +3,297 @@ package dataAccess;
 import java.io.File;
 //import java.util.Enumeration;
 //import java.util.Vector;
-
-
 import java.rmi.RemoteException;
-import java.sql.Date;
-import java.util.HashSet;
+import java.util.Date;
+import java.util.List;
 import java.util.ListIterator;
 import java.util.Vector;
 
-import com.db4o.*;
+import com.db4o.Db4oEmbedded;
+import com.db4o.ObjectContainer;
+import com.db4o.ObjectSet;
 import com.db4o.config.EmbeddedConfiguration;
 import com.db4o.cs.Db4oClientServer;
 import com.db4o.cs.config.ClientConfiguration;
+import com.db4o.query.Predicate;
 
 import configuration.ConfigXML;
 import domain.Account;
+import domain.Administrator;
 import domain.Booking;
+import domain.Client;
+import domain.HouseFeatures;
 import domain.Offer;
 //import dataModel.Offer;
 import domain.Owner;
 import domain.RuralHouse;
 import exceptions.OfferCanNotBeBooked;
 import exceptions.OverlappingOfferExists;
-public class DB4oManager { 
 
-       private static ObjectContainer  db;
+public class DB4oManager {
+
+       private static ObjectContainer db;
        private static EmbeddedConfiguration configuration;
        private static ClientConfiguration configurationCS;
-       private int bookingNumber=0; // if it is "static" then it is not serialized
-       private int offerNumber=0;   // if it is "static" then it is not serialized
-       private static DB4oManager theDB4oManager=null;
+       private int bookingNumber = 0; // if it is "static" then it is not
+                                                                       // serialized
+       private int offerNumber = 0; // if it is "static" then it is not serialized
+       private static DB4oManager theDB4oManager = null;
 
        private static DB4oManagerAux theDB4oManagerAux;
+
        static ConfigXML c;
 
        private DB4oManager() throws Exception {
-               theDB4oManagerAux=new DB4oManagerAux(0,0);
-               c=ConfigXML.getInstance();
-               System.out.println("Creating DB4oManager instance => isDatabaseLocal: "+c.isDatabaseLocal()+" getDatabBaseOpenMode: "+c.getDataBaseOpenMode());
-
-               
-               if ((c.getDataBaseOpenMode().equals("initialize")) && (c.isDatabaseLocal()))
-                               new File(c.getDb4oFilename()).delete();
-               
-               if (c.isDatabaseLocal())
-               {
-                       configuration = Db4oEmbedded.newConfiguration();
-                       configuration.common().activationDepth(c.getActivationDepth());
-                       configuration.common().updateDepth(c.getUpdateDepth());
-                       db=Db4oEmbedded.openFile(configuration, c.getDb4oFilename());
+               theDB4oManagerAux = new DB4oManagerAux(0, 0);
+               c = ConfigXML.getInstance();
+               System.out.println("Creating DB4oManager instance => isDatabaseLocal: "
+                               + c.isDatabaseLocal() + " getDatabBaseOpenMode: "
+                               + c.getDataBaseOpenMode());
+
+               if ((c.getDataBaseOpenMode().equals("initialize"))
+                               && (c.isDatabaseLocal()))
+                       new File(c.getDb4oFilename()).delete();
+
+               if (c.isDatabaseLocal()) {
+                       openDB();
                        System.out.println("DataBase opened");
+               } else // c.isDatabaseLocal==false
+               {
+                       openSDB();
+                       System.out.println("Remote DataBase opened");
                }
-               else // c.isDatabaseLocal==false
-               { 
-                       openObjectContainer();
-               }
-               if (c.getDataBaseOpenMode().equals("initialize"))
-               {       initializeDB();
+               if (c.getDataBaseOpenMode().equals("initialize")) {
+                       initializeDB();
                        System.out.println("DataBase initialized");
+               } else // c.getDataBaseOpenMode().equals("open")
+
+               {
+                       ObjectSet<DB4oManagerAux> res = db
+                                       .queryByExample(DB4oManagerAux.class);
+                       ListIterator<DB4oManagerAux> listIter = res.listIterator();
+                       if (listIter.hasNext())
+                               theDB4oManagerAux = (DB4oManagerAux) res.next();
                }
-               else // c.getDataBaseOpenMode().equals("open")
-               
-                       {       
-                               ObjectSet res =db.queryByExample(DB4oManagerAux.class);
-                               ListIterator listIter = res.listIterator();
-                               if (listIter.hasNext()) theDB4oManagerAux = (DB4oManagerAux) res.next();                
-            }
-               }
+       }
 
-       private static void openDB(){
+       private static void openDB() {
                configuration = Db4oEmbedded.newConfiguration();
                configuration.common().activationDepth(c.getActivationDepth());
                configuration.common().updateDepth(c.getUpdateDepth());
-               db=Db4oEmbedded.openFile(configuration, c.getDb4oFilename());
+               configuration.common().objectClass(Owner.class).cascadeOnUpdate(true);
+               configuration.common().objectClass(Owner.class).cascadeOnDelete(true);
+               configuration.common().objectClass(RuralHouse.class)
+                               .cascadeOnUpdate(true);
+               configuration.common().objectClass(Account.class).cascadeOnUpdate(true);
+               db = Db4oEmbedded.openFile(configuration, c.getDb4oFilename());
        }
-               
-       private void openObjectContainer(){
-               
+
+       private void openSDB() {
+
                configurationCS = Db4oClientServer.newClientConfiguration();
                configurationCS.common().activationDepth(c.getActivationDepth());
                configurationCS.common().updateDepth(c.getUpdateDepth());
                configurationCS.common().objectClass(Owner.class).cascadeOnDelete(true);
-               db = Db4oClientServer.openClient(configurationCS,c.getDatabaseNode(), 
-                                c.getDatabasePort(),c.getUser(),c.getPassword());
+               db = Db4oClientServer.openClient(configurationCS, c.getDatabaseNode(),
+                               c.getDatabasePort(), c.getUser(), c.getPassword());
 
        }
-       
+
        class DB4oManagerAux {
                int bookingNumber;
                int offerNumber;
-               DB4oManagerAux(int bookingNumber,int offerNumber){
-                       this.bookingNumber=bookingNumber;
-                       this.offerNumber=offerNumber;
+
+               DB4oManagerAux(int bookingNumber, int offerNumber) {
+                       this.bookingNumber = bookingNumber;
+                       this.offerNumber = offerNumber;
                }
        }
 
-       public static DB4oManager getInstance() throws Exception{
-               if (theDB4oManager==null)
-                       theDB4oManager=new DB4oManager();
+       public static DB4oManager getInstance() throws Exception {
+               if (theDB4oManager == null)
+                       theDB4oManager = new DB4oManager();
                return theDB4oManager;
        }
-       
-       
-       public void initializeDB(){
-               
+
+       public void initializeDB() {
+
                try {
-                       Owner jon = new Owner("Jon");
-                       Owner alfredo = new Owner("Alfredo");
-                       jon.addRuralHouse(1, "Ezkioko etxea", "Ezkio", 3, 3, 3, 3, 3);
-                       jon.addRuralHouse(2, "Eskiatzeko etxea", "Jaca", 4, 4, 4, 4, 4);
-                       jon.setBankAccount("1349 5677 21 2133567777");
-                       alfredo.addRuralHouse(3, "Casa del abuelo", "Pitillas", 5, 5,
+                       Owner jon = new Owner("Jon", "1349 5677 21 2133567777",
+                                       "Jon@gmail.com");
+                       Owner alfredo = new Owner("Alfredo", "4144 0087 23 9700002133",
+                                       "alfredo@gmail.com");
+                       jon.addRuralHouse("Ezkioko", "Ezkioko etxea", "Beatriz", 3, 3, 3,
+                                       3, 3);
+                       jon.addRuralHouse("Eskiatze", "Eskiatzeko etxea", "Guazate", 4, 4,
+                                       4, 4, 4);
+                       alfredo.addRuralHouse("Aitonako", "Casa del abuelo", "Vegas", 5, 5,
                                        5, 5, 5);
-                       alfredo.addRuralHouse(4,"", "Murgia", 6, 6, 6, 6, 6);
-                       alfredo.setBankAccount("4144 0087 23 9700002133");
-                       Account jonAcc = new Account("userJon", "passJon", jon);
+
+                       alfredo.addRuralHouse("Murgoitz", "", "Cedro", 6, 6, 6, 6, 6);
+                       Account jonAcc = new Account("1", "1", jon);
                        Account alfredoAcc = new Account("userAlfredo", "passAlfredo",
                                        alfredo);
-                       db.store(jon);
-                       db.store(alfredo);
+
+                       Account admin = new Account("admin", "admin", true);
+                       db.store(Administrator.getInstance());
                        db.store(jonAcc);
                        db.store(alfredoAcc);
+                       db.store(admin);
                        db.commit();
-               }
-               finally {
-                       //db.close();
+               } finally {
+                       db.close();
                }
        }
-       
-       @SuppressWarnings("finally")
-       public Offer createOffer(RuralHouse ruralHouse, Date firstDay, Date lastDay,
-                       float price) throws RemoteException, Exception {
-       Offer o = null;
-       try {
-               
-               if (c.isDatabaseLocal()==false) openObjectContainer();
-               
-               
-               RuralHouse proto = new RuralHouse(ruralHouse.getHouseNumber(),null,null,null,null);
-               ObjectSet result = db.queryByExample(proto);
-               RuralHouse rh=(RuralHouse)result.next();
-               o=rh.createOffer(theDB4oManagerAux.offerNumber++,firstDay, lastDay, price);
-               db.store(theDB4oManagerAux); // To store the new value for offerNumber
-               db.store(o);
-               db.commit(); 
-               
-       }
-       catch (com.db4o.ext.ObjectNotStorableException e){
-               System.out.println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
+
+       public void deleteDB() {
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       Owner proto = new Owner(null, null, null);
+                       ObjectSet<Owner> result = db.queryByExample(proto);
+                       while (result.hasNext()) {
+                               Owner o = (Owner) result.next();
+                               System.out.println("Deleted owner: " + o.toString());
+                               db.delete(o);
+                       }
+                       db.commit();
+               } finally {
+                       db.close();
+               }
        }
-       finally {
+
+       public Offer createOffer(RuralHouse ruralHouse, Date firstDay,
+                       Date lastDay, float price) throws RemoteException, Exception {
+               Offer o = null;
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+
+                       RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
+                                       null, null, null);
+                       ObjectSet<RuralHouse> result = db.queryByExample(proto);
+                       RuralHouse rh = (RuralHouse) result.next();
+                       o = rh.createOffer(theDB4oManagerAux.offerNumber++, firstDay,
+                                       lastDay, price);
+                       db.store(theDB4oManagerAux); // To store the new value for
+                                                                                       // offerNumber
+                       db.store(o);
+                       db.commit();
+
+               } catch (com.db4o.ext.ObjectNotStorableException e) {
+                       System.out
+                                       .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
+               } finally {
+                       db.close();
+               }
                return o;
        }
+
+       public void deleteOffer(Offer offer) throws RemoteException, Exception {
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       ObjectSet<Offer> of = db.queryByExample(offer);
+                       RuralHouse rh = of.get(0).getRuralHouse();
+                       System.out.println(rh.offers.remove(of.get(0)));
+                       db.store(rh);
+                       db.commit();
+
+               } catch (com.db4o.ext.ObjectNotStorableException e) {
+                       System.out
+                                       .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
+               } finally {
+                       db.close();
+               }
+       }
+
+       public Vector<Offer> getRHsOffer(String name){
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       RuralHouse rh = (RuralHouse)db.queryByExample(new RuralHouse(name, null, null, null, null)).get(0);
+                       Offer proto = new Offer(0, rh, null, null, 0);
+                       ObjectSet<Offer> result = db.queryByExample(proto);
+                       return new Vector<Offer>(result);
+               } finally {
+                       db.close();
+               }
        }
        
-       public void deleteDB() {
-               
+       public Administrator getAdminData(){
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+
+                       List<Administrator> admL = db.query(new Predicate<Administrator>() {
+                               private static final long serialVersionUID = 1L;
+
+                               public boolean match(Administrator admin) {
+                                       return true;
+                               }
+                       });
+
+                       return admL.get(0);
+               } finally {
+                       db.close();
+
+               }
+
+       }
+
+       public void storeAdmin() {
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
                try {
-                        Owner proto = new Owner(null,null);
-                        ObjectSet result = db.queryByExample(proto);
-                        Vector<Owner> owners=new Vector<Owner>();
-                        while(result.hasNext())
-                        {      Owner o = (Owner)result.next();
-                               System.out.println("Deleted owner: "+o.toString());
-                               db.delete(o);
-                        }
-                        db.commit();
-            } finally {
-               // db.close();
-            }
+
+                       List<Administrator> admL = db.query(new Predicate<Administrator>() {
+                               /**
+                                * 
+                                */
+                               private static final long serialVersionUID = 1L;
+
+                               public boolean match(Administrator admin) {
+                                       return true;
+                               }
+                       });
+
+                       admL.get(0).setAddRequest(
+                                       Administrator.getInstance().getAddRequest());
+                       admL.get(0).setRemoveRequest(
+                                       Administrator.getInstance().getRemoveRequest());
+                       admL.get(0).setNewOwnerRequest(
+                                       Administrator.getInstance().getNewOwnerRequest());
+
+                       db.commit();
+
+               } catch (Exception e) {
+
+               } finally {
+                       db.close();
+               }
+
        }
 
        /**
@@ -181,122 +303,128 @@ public class DB4oManager {
         *            day, last day, house number and telephone
         * @return a book
         */
-       public Booking createBooking(RuralHouse ruralHouse, Date firstDate, Date lastDate, String bookTelephoneNumber)
-                       throws OfferCanNotBeBooked {
-               
+       public Vector<Booking> createBooking(RuralHouse ruralHouse, Date firstDate,
+                       Date lastDate, Client cl) throws OfferCanNotBeBooked {
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               Vector<Booking> book = new Vector<Booking>();
+
                try {
 
-                       if (c.isDatabaseLocal()==false) openObjectContainer();
+                       if (c.isDatabaseLocal() == false)
+                               openSDB();
 
-                       RuralHouse proto = new RuralHouse(ruralHouse.getHouseNumber(),null,ruralHouse.getDescription(),ruralHouse.getTown(), null);
-                        ObjectSet result = db.queryByExample(proto);
-                        RuralHouse rh=(RuralHouse)result.next();
+                       RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
+                                       null, null, null);
+                       ObjectSet<RuralHouse> result = db.queryByExample(proto);
+                       RuralHouse rh = (RuralHouse) result.next();
 
                        Offer offer;
-                       offer = rh.findOffer(firstDate, lastDate);
+                       offer = (Offer)db.queryByExample(new Offer(0, rh, firstDate, lastDate, 0)).get(0);
+
+                       if (offer != null) {
+                               offer.createBooking(theDB4oManagerAux.bookingNumber++, cl);
+                               db.store(theDB4oManagerAux); // To store the new value for
+                                                                                               // bookingNumber
 
-                       if (offer!=null) {
-                               offer.createBooking(theDB4oManagerAux.bookingNumber++, bookTelephoneNumber);
-                               db.store(theDB4oManagerAux); // To store the new value for bookingNumber
                                db.store(offer);
                                db.commit();
-                               return offer.getBooking();
-                       }
-                       return null;
+                               book = offer.getBookings();
 
-               } catch (com.db4o.ext.ObjectNotStorableException e){
-                               System.out.println("Error: com.db4o.ext.ObjectNotStorableException in createBooking");
-                               return null;
                        }
-               catch (Exception exc) {
+
+               } catch (com.db4o.ext.ObjectNotStorableException e) {
+                       System.out
+                                       .println("Error: com.db4o.ext.ObjectNotStorableException in createBooking");
+               } catch (Exception exc) {
                        exc.printStackTrace();
-                       return null;
+               } finally {
+                       db.close();
                }
+               return book;
        }
 
-
        /**
-        * This method existing  owners 
+        * This method existing owners
         * 
         */
-       public Vector<Owner> getOwners() throws RemoteException,
-                       Exception {
-               
-               if (c.isDatabaseLocal()==false) openObjectContainer();
-
-                try {
-                        Owner proto = new Owner(null,null);
-                        ObjectSet result = db.queryByExample(proto);
-                        Vector<Owner> owners=new Vector<Owner>();
-                        while(result.hasNext())                                 
-                                owners.add((Owner)result.next());
-                        return owners;
-            } finally {
-                //db.close();
-            }
-       } 
-       public Vector<RuralHouse> getAllRuralHouses() throws RemoteException,
-       Exception {
-               if (c.isDatabaseLocal()==false) openObjectContainer();
-
-                try {
-                        RuralHouse proto = new RuralHouse(0,null,null,null,null);
-                        ObjectSet result = db.queryByExample(proto);
-                        Vector<RuralHouse> ruralHouses=new Vector<RuralHouse>();
-                        while(result.hasNext()) 
-                                ruralHouses.add((RuralHouse)result.next());
-                        return ruralHouses;
-            } finally {
-               // db.close();
-            }
-       }
-       
-       public boolean existsOverlappingOffer(RuralHouse rh,Date firstDay, Date lastDay) throws RemoteException, OverlappingOfferExists{
-                try {
-                       if (c.isDatabaseLocal()==false) openObjectContainer();
-
-                       RuralHouse rhn = (RuralHouse) db.queryByExample(new RuralHouse(rh.getHouseNumber(),null,null,null,null)).next();                
-                       if (rhn.overlapsWith(firstDay, lastDay)!=null) throw new OverlappingOfferExists();
-                       else return false; 
-            } finally {
-                //db.close();
-            }
+       public Vector<Owner> getOwners() throws RemoteException, Exception {
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       Owner proto = new Owner(null, null, null);
+                       ObjectSet<Owner> result = db.queryByExample(proto);
+                       Vector<Owner> owners = new Vector<Owner>();
+                       while (result.hasNext())
+                               owners.add((Owner) result.next());
+                       return owners;
+               } finally {
+                       db.close();
+               }
        }
 
-       public static ObjectContainer getContainer(){
-               return db;
+       public boolean existsOverlappingOffer(RuralHouse rh, Date firstDay,
+                       Date lastDay) throws RemoteException, OverlappingOfferExists {
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+
+                       RuralHouse rhn = (RuralHouse) db.queryByExample(
+                                       new RuralHouse(rh.getHouseName(), null, null, null, null))
+                                       .next();
+                       if (rhn.overlapsWith(firstDay, lastDay) != null)
+                               throw new OverlappingOfferExists();
+                       else
+                               return false;
+               } finally {
+                       db.close();
+               }
        }
-       
-       public void close(){
+
+       public void close() {
                db.close();
                System.out.println("DataBase closed");
        }
-       
+
        public String toString() {
-               return "bookingNumber="+bookingNumber+" offerNumber="+offerNumber;
+               return "bookingNumber=" + bookingNumber + " offerNumber=" + offerNumber;
        }
 
-
-
        /**
         * @param usr
-        * @param pwd
+        * @param ps
         * @return
         * @throws RemoteException
         * @throws Exception
         */
-       public Vector<Account> getAccount(String usr, String pwd)
-                       throws RemoteException, Exception {
+       public Vector<Account> getAccount(Account proto) throws RemoteException,
+                       Exception {
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
 
                try {
-                       Account proto = new Account(usr, pwd, new Owner(null, null));
                        ObjectSet<Account> result = db.queryByExample(proto);
                        Vector<Account> accounts = new Vector<Account>();
                        while (result.hasNext())
                                accounts.add((Account) result.next());
                        return accounts;
                } finally {
-                       //db.close();
+                       db.close();
                }
        }
 
@@ -304,14 +432,26 @@ public class DB4oManager {
         * @param rh
         */
        public boolean storeRuralHouses(RuralHouse rh) {
-               DB4oManager.openDB();
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
                boolean stored = false;
-               ObjectContainer db = DB4oManager.getContainer();
-               RuralHouse house = new RuralHouse(rh.getHouseNumber(), null, null,
-                               null, null);
+               RuralHouse house = new RuralHouse(rh.getHouseName(), null, null, null,
+                               null);
                try {
-                       ObjectSet<Owner> result = db.queryByExample(house);
+                       ObjectSet<RuralHouse> result = db.queryByExample(house);
                        if (result.isEmpty()) {
+                               Owner ow = (Owner) db.queryByExample(rh.getOwner()).get(0);
+                               rh.setOwner(ow);
+                               ow.addRuralHouse(rh);
+                               db.store(rh);
+                               db.commit();
+                               stored = true;
+                       } else {
+                               db.delete(result.get(0));
                                db.store(rh);
                                db.commit();
                                stored = true;
@@ -322,22 +462,137 @@ public class DB4oManager {
                return stored;
        }
 
-       public void removeHouse(int houseNumber) {
-               DB4oManager.openDB();
-               RuralHouse house = new RuralHouse(houseNumber, null, null, null, null);
+       public void removeHouse(RuralHouse rh, Owner owner) {
+
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
                try {
-                       ObjectSet<RuralHouse> result = db.queryByExample(house);
+                       ObjectSet<Owner> result = db.queryByExample(owner);
+                       ObjectSet<RuralHouse> rhs = db.queryByExample(rh);
+                       if (!rhs.isEmpty()) {
+                               Owner found = result.get(0);
+                               found.getRuralHouses().remove(rhs.get(0));
+                               db.delete(rhs.get(0));
+                               db.store(found);
+                               db.commit();
+                       }
+               } catch (Exception exc) {
+                       exc.printStackTrace();
+               } finally {
+                       db.close();
+               }
+
+       }
+
+       public Vector<RuralHouse> getRuralHouses(Owner ow, String name, String town,
+                       int nBed, int nKit, int nBath, int nPark, int nLiv) {
+               HouseFeatures fea = new HouseFeatures(nBed, nKit, nBath, nLiv, nPark);
+               RuralHouse rh = new RuralHouse(name, ow, null, town, fea);
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       ObjectSet<RuralHouse> result = db.queryByExample(rh);
+                       Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
+                       while (result.hasNext())
+                               ruralHouses.add(result.next());
+                       db.close();
+                       return ruralHouses;
+               } catch (NullPointerException e) {
+                       return null;
+               }
+
+       }
+
+       public boolean addAccount(Account acc) {
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       ObjectSet<Account> result = db.queryByExample(new Account(acc
+                                       .getUsername()));
+                       if (result.isEmpty()) {
+                               db.store(acc);
+                               db.commit();
+                               return true;
+                       }
+               } catch (Exception exc) {
+                       exc.printStackTrace();
+               } finally {
+                       db.close();
+               }
+               return false;
+       }
+
+       // TODO remove account
+
+       public boolean removeAccount(Account acc) {
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       ObjectSet<Account> result = db.queryByExample(new Account(acc
+                                       .getUsername()));
                        if (!result.isEmpty()) {
-                               RuralHouse found = (RuralHouse) result.get(0);
-                               db.delete(found);
+                               db.delete(result.get(0));
+                               ;
                                db.commit();
+                               return true;
                        }
                } catch (Exception exc) {
                        exc.printStackTrace();
                } finally {
                        db.close();
                }
+               return false;
+       }
+
+       // TODO this method should be improved.
+       public void acceptBooking(Offer of) {
+               Offer off = new Offer(of.getOfferNumber(), of.getRuralHouse(),
+                               of.getFirstDay(), of.getLastDay(), of.getPrice());
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+
+               try {
+                       ObjectSet<Offer> result = db.queryByExample(off);
+                       this.deleteOffer(result.get(0));
+                       db.store(of);
+                       db.close();
+
+               } catch (Exception e) {
+                       e.printStackTrace();
+                       ;
+               }
+       }
+
+       public void removeBooking(Booking b) {
+               if (c.isDatabaseLocal() == false)
+                       openSDB();
+               else
+                       openDB();
+               try {
+                       ObjectSet<Booking> result = db.queryByExample(b);
+                       ObjectSet<Client> result2 = db.queryByExample(b.getClient());
+                       db.delete(result.get(0));
+                       db.delete(result2.get(0));
+                       db.commit();
+               } catch (Exception e) {
+                       e.printStackTrace();
+                       ;
+               } finally {
+                       db.close();
+               }
 
        }
 }
-