xp-dev.com Git - RRRRHHHH_Code/blob - ruralHouses/src/dataAccess/DB4oManager.java

   1 package dataAccess;
   2
   3 import java.io.File;
   4 //import java.util.Enumeration;
   5 //import java.util.Vector;
   6
   7 import java.rmi.RemoteException;
   8 import java.sql.Date;
   9 import java.util.HashSet;
  10 import java.util.ListIterator;
  11 import java.util.Vector;
  12
  13 import com.db4o.*;
  14 import com.db4o.config.EmbeddedConfiguration;
  15 import com.db4o.cs.Db4oClientServer;
  16 import com.db4o.cs.config.ClientConfiguration;
  17
  18 import configuration.ConfigXML;
  19 import domain.Account;
  20 import domain.Booking;
  21 import domain.Offer;
  22 //import dataModel.Offer;
  23 import domain.Owner;
  24 import domain.RuralHouse;
  25 import exceptions.OfferCanNotBeBooked;
  26 import exceptions.OverlappingOfferExists;
  27
  28 public class DB4oManager {
  29
  30         private static ObjectContainer db;
  31         private static EmbeddedConfiguration configuration;
  32         private static ClientConfiguration configurationCS;
  33         private int bookingNumber = 0; // if it is "static" then it is not
  34                                                                         // serialized
  35         private int offerNumber = 0; // if it is "static" then it is not serialized
  36         private static DB4oManager theDB4oManager = null;
  37
  38         private static DB4oManagerAux theDB4oManagerAux;
  39         static ConfigXML c;
  40
  41         private DB4oManager() throws Exception {
  42                 theDB4oManagerAux = new DB4oManagerAux(0, 0);
  43                 c = ConfigXML.getInstance();
  44                 System.out.println("Creating DB4oManager instance => isDatabaseLocal: "
  45                                 + c.isDatabaseLocal() + " getDatabBaseOpenMode: "
  46                                 + c.getDataBaseOpenMode());
  47
  48                 if ((c.getDataBaseOpenMode().equals("initialize"))
  49                                 && (c.isDatabaseLocal()))
  50                         new File(c.getDb4oFilename()).delete();
  51
  52                 if (c.isDatabaseLocal()) {
  53                         openDB();
  54                         System.out.println("DataBase opened");
  55                 } else // c.isDatabaseLocal==false
  56                 {
  57                         openSDB();
  58                         System.out.println("Remote DataBase opened");
  59                 }
  60                 if (c.getDataBaseOpenMode().equals("initialize")) {
  61                         initializeDB();
  62                         System.out.println("DataBase initialized");
  63                 } else // c.getDataBaseOpenMode().equals("open")
  64
  65                 {
  66                         ObjectSet res = db.queryByExample(DB4oManagerAux.class);
  67                         ListIterator listIter = res.listIterator();
  68                         if (listIter.hasNext())
  69                                 theDB4oManagerAux = (DB4oManagerAux) res.next();
  70                 }
  71         }
  72
  73         private static void openDB() {
  74                 configuration = Db4oEmbedded.newConfiguration();
  75                 configuration.common().activationDepth(c.getActivationDepth());
  76                 configuration.common().updateDepth(c.getUpdateDepth());
  77                 configuration.common().objectClass(Owner.class).cascadeOnDelete(true);
  78                 db = Db4oEmbedded.openFile(configuration, c.getDb4oFilename());
  79         }
  80
  81         private void openSDB() {
  82
  83                 configurationCS = Db4oClientServer.newClientConfiguration();
  84                 configurationCS.common().activationDepth(c.getActivationDepth());
  85                 configurationCS.common().updateDepth(c.getUpdateDepth());
  86                 configurationCS.common().objectClass(Owner.class).cascadeOnDelete(true);
  87                 db = Db4oClientServer.openClient(configurationCS, c.getDatabaseNode(),
  88                                 c.getDatabasePort(), c.getUser(), c.getPassword());
  89
  90         }
  91
  92         class DB4oManagerAux {
  93                 int bookingNumber;
  94                 int offerNumber;
  95
  96                 DB4oManagerAux(int bookingNumber, int offerNumber) {
  97                         this.bookingNumber = bookingNumber;
  98                         this.offerNumber = offerNumber;
  99                 }
 100         }
 101
 102         public static DB4oManager getInstance() throws Exception {
 103                 if (theDB4oManager == null)
 104                         theDB4oManager = new DB4oManager();
 105                 return theDB4oManager;
 106         }
 107
 108         public void initializeDB() {
 109
 110                 try {
 111                         Owner jon = new Owner("Jon");
 112                         Owner alfredo = new Owner("Alfredo");
 113                         jon.addRuralHouse(1, "Ezkioko etxea", "Ezkio", 3, 3, 3, 3, 3);
 114                         jon.addRuralHouse(2, "Eskiatzeko etxea", "Jaca", 4, 4, 4, 4, 4);
 115                         jon.setBankAccount("1349 5677 21 2133567777");
 116                         alfredo.addRuralHouse(3, "Casa del abuelo", "Pitillas", 5, 5, 5, 5,
 117                                         5);
 118                         alfredo.addRuralHouse(4, "", "Murgia", 6, 6, 6, 6, 6);
 119                         alfredo.setBankAccount("4144 0087 23 9700002133");
 120                         Account jonAcc = new Account("userJon", "passJon", jon);
 121                         Account alfredoAcc = new Account("userAlfredo", "passAlfredo",
 122                                         alfredo);
 123                         db.store(jon);
 124                         db.store(alfredo);
 125                         db.store(jonAcc);
 126                         db.store(alfredoAcc);
 127                         db.commit();
 128                 } finally {
 129                         db.close();
 130                 }
 131         }
 132
 133         @SuppressWarnings("finally")
 134         public Offer createOffer(RuralHouse ruralHouse, Date firstDay,
 135                         Date lastDay, float price) throws RemoteException, Exception {
 136                 Offer o = null;
 137
 138                 if (c.isDatabaseLocal() == false)
 139                         openSDB();
 140                 else
 141                         openDB();
 142
 143                 try {
 144
 145                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseNumber(),
 146                                         null, null, null, null);
 147                         ObjectSet result = db.queryByExample(proto);
 148                         RuralHouse rh = (RuralHouse) result.next();
 149                         o = rh.createOffer(theDB4oManagerAux.offerNumber++, firstDay,
 150                                         lastDay, price);
 151                         db.store(theDB4oManagerAux); // To store the new value for
 152                                                                                         // offerNumber
 153                         db.store(o);
 154                         db.commit();
 155
 156                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 157                         System.out
 158                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
 159                 } finally {
 160                         db.close();
 161                 }
 162                 return o;
 163         }
 164
 165         public void deleteDB() {
 166
 167                 if (c.isDatabaseLocal() == false)
 168                         openSDB();
 169                 else
 170                         openDB();
 171
 172                 try {
 173                         Owner proto = new Owner(null, null);
 174                         ObjectSet result = db.queryByExample(proto);
 175                         Vector<Owner> owners = new Vector<Owner>();
 176                         while (result.hasNext()) {
 177                                 Owner o = (Owner) result.next();
 178                                 System.out.println("Deleted owner: " + o.toString());
 179                                 db.delete(o);
 180                         }
 181                         db.commit();
 182                 } finally {
 183                         db.close();
 184                 }
 185         }
 186
 187         /**
 188          * This method creates a book with a corresponding parameters
 189          *
 190          * @param First
 191          *            day, last day, house number and telephone
 192          * @return a book
 193          */
 194         public Booking createBooking(RuralHouse ruralHouse, Date firstDate,
 195                         Date lastDate, String bookTelephoneNumber)
 196                         throws OfferCanNotBeBooked {
 197
 198                 if (c.isDatabaseLocal() == false)
 199                         openSDB();
 200                 else
 201                         openDB();
 202
 203                 Booking bok = null;
 204
 205                 try {
 206
 207                         if (c.isDatabaseLocal() == false)
 208                                 openSDB();
 209
 210                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseNumber(),
 211                                         null, ruralHouse.getDescription(), ruralHouse.getTown(),
 212                                         null);
 213                         ObjectSet result = db.queryByExample(proto);
 214                         RuralHouse rh = (RuralHouse) result.next();
 215
 216                         Offer offer;
 217                         offer = rh.findOffer(firstDate, lastDate);
 218
 219                         if (offer != null) {
 220                                 offer.createBooking(theDB4oManagerAux.bookingNumber++,
 221                                                 bookTelephoneNumber);
 222                                 db.store(theDB4oManagerAux); // To store the new value for
 223                                                                                                 // bookingNumber
 224                                 db.store(offer);
 225                                 db.commit();
 226                                 bok = offer.getBooking();
 227                         }
 228
 229                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 230                         System.out
 231                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createBooking");
 232                 } catch (Exception exc) {
 233                         exc.printStackTrace();
 234                 } finally {
 235                         db.close();
 236                 }
 237
 238                 return bok;
 239         }
 240
 241         /**
 242          * This method existing owners
 243          *
 244          */
 245         public Vector<Owner> getOwners() throws RemoteException, Exception {
 246
 247                 if (c.isDatabaseLocal() == false)
 248                         openSDB();
 249                 else
 250                         openDB();
 251
 252                 try {
 253                         Owner proto = new Owner(null, null);
 254                         ObjectSet result = db.queryByExample(proto);
 255                         Vector<Owner> owners = new Vector<Owner>();
 256                         while (result.hasNext())
 257                                 owners.add((Owner) result.next());
 258                         return owners;
 259                 } finally {
 260                         db.close();
 261                 }
 262         }
 263
 264         public Vector<RuralHouse> getAllRuralHouses() throws RemoteException,
 265                         Exception {
 266
 267                 if (c.isDatabaseLocal() == false)
 268                         openSDB();
 269                 else
 270                         openDB();
 271
 272                 try {
 273                         RuralHouse proto = new RuralHouse(0, null, null, null, null);
 274                         ObjectSet result = db.queryByExample(proto);
 275                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 276                         while (result.hasNext())
 277                                 ruralHouses.add((RuralHouse) result.next());
 278                         return ruralHouses;
 279                 } finally {
 280                         db.close();
 281                 }
 282         }
 283
 284         public boolean existsOverlappingOffer(RuralHouse rh, Date firstDay,
 285                         Date lastDay) throws RemoteException, OverlappingOfferExists {
 286
 287                 if (c.isDatabaseLocal() == false)
 288                         openSDB();
 289                 else
 290                         openDB();
 291
 292                 try {
 293
 294                         RuralHouse rhn = (RuralHouse) db
 295                                         .queryByExample(
 296                                                         new RuralHouse(rh.getHouseNumber(), null, null,
 297                                                                         null, null)).next();
 298                         if (rhn.overlapsWith(firstDay, lastDay) != null)
 299                                 throw new OverlappingOfferExists();
 300                         else
 301                                 return false;
 302                 } finally {
 303                         db.close();
 304                 }
 305         }
 306
 307         public static ObjectContainer getContainer() {
 308                 return db;
 309         }
 310
 311         public void close() {
 312                 db.close();
 313                 System.out.println("DataBase closed");
 314         }
 315
 316         public String toString() {
 317                 return "bookingNumber=" + bookingNumber + " offerNumber=" + offerNumber;
 318         }
 319
 320         /**
 321          * @param usr
 322          * @param pwd
 323          * @return
 324          * @throws RemoteException
 325          * @throws Exception
 326          */
 327         public Vector<Account> getAccount(String usr, String pwd)
 328                         throws RemoteException, Exception {
 329
 330                 if (c.isDatabaseLocal() == false)
 331                         openSDB();
 332                 else
 333                         openDB();
 334
 335                 try {
 336                         Account proto = new Account(usr, pwd, new Owner(null, null));
 337                         ObjectSet<Account> result = db.queryByExample(proto);
 338                         Vector<Account> accounts = new Vector<Account>();
 339                         while (result.hasNext())
 340                                 accounts.add((Account) result.next());
 341                         return accounts;
 342                 } finally {
 343                         db.close();
 344                 }
 345         }
 346
 347         /**
 348          * @param rh
 349          */
 350         public boolean storeRuralHouses(RuralHouse rh) {
 351
 352                 if (c.isDatabaseLocal() == false)
 353                         openSDB();
 354                 else
 355                         openDB();
 356
 357                 boolean stored = false;
 358                 RuralHouse house = new RuralHouse(rh.getHouseNumber(), null, null,
 359                                 null, null);
 360                 try {
 361                         ObjectSet<Owner> result = db.queryByExample(house);
 362                         if (result.isEmpty()) {
 363                                 db.store(rh);
 364                                 db.commit();
 365                                 stored = true;
 366                         }
 367                 } finally {
 368                         db.close();
 369                 }
 370                 return stored;
 371         }
 372
 373         public void removeHouse(int houseNumber) {
 374
 375                 if (c.isDatabaseLocal() == false)
 376                         openSDB();
 377                 else
 378                         openDB();
 379
 380                 RuralHouse house = new RuralHouse(houseNumber, null, null, null, null);
 381                 try {
 382                         ObjectSet<RuralHouse> result = db.queryByExample(house);
 383                         if (!result.isEmpty()) {
 384                                 RuralHouse found = (RuralHouse) result.get(0);
 385                                 db.delete(found);
 386                                 db.commit();
 387                         }
 388                 } catch (Exception exc) {
 389                         exc.printStackTrace();
 390                 } finally {
 391                         db.close();
 392                 }
 393
 394         }
 395
 396         public Vector<RuralHouse> getRuralHousesByTown(String town) {
 397                 RuralHouse rh = new RuralHouse(0, null, null, town, null);
 398
 399                 if (c.isDatabaseLocal() == false)
 400                         openSDB();
 401                 else
 402                         openDB();
 403
 404                 try {
 405                         ObjectSet<RuralHouse> result = db.queryByExample(rh);
 406                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 407                         while (result.hasNext())
 408                                 ruralHouses.add(result.next());
 409                         return ruralHouses;
 410                 } finally {
 411                         db.close();
 412                 }
 413
 414         }
 415 }