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 import java.rmi.RemoteException;
   7 import java.util.Date;
   8 import java.util.List;
   9 import java.util.ListIterator;
  10 import java.util.Vector;
  11
  12 import com.db4o.Db4oEmbedded;
  13 import com.db4o.ObjectContainer;
  14 import com.db4o.ObjectSet;
  15 import com.db4o.config.EmbeddedConfiguration;
  16 import com.db4o.cs.Db4oClientServer;
  17 import com.db4o.cs.config.ClientConfiguration;
  18 import com.db4o.query.Predicate;
  19
  20 import configuration.ConfigXML;
  21 import domain.Account;
  22 import domain.Administrator;
  23 import domain.Booking;
  24 import domain.Client;
  25 import domain.HouseFeatures;
  26 import domain.Offer;
  27 //import dataModel.Offer;
  28 import domain.Owner;
  29 import domain.RuralHouse;
  30 import exceptions.OfferCanNotBeBooked;
  31 import exceptions.OverlappingOfferExists;
  32
  33 public class DB4oManager {
  34
  35         private static ObjectContainer db;
  36         private static EmbeddedConfiguration configuration;
  37         private static ClientConfiguration configurationCS;
  38         private int bookingNumber = 0; // if it is "static" then it is not
  39                                                                         // serialized
  40         private int offerNumber = 0; // if it is "static" then it is not serialized
  41         private static DB4oManager theDB4oManager = null;
  42
  43         private static DB4oManagerAux theDB4oManagerAux;
  44
  45         static ConfigXML c;
  46
  47         private DB4oManager() throws Exception {
  48                 theDB4oManagerAux = new DB4oManagerAux(0, 0);
  49                 c = ConfigXML.getInstance();
  50                 System.out.println("Creating DB4oManager instance => isDatabaseLocal: "
  51                                 + c.isDatabaseLocal() + " getDatabBaseOpenMode: "
  52                                 + c.getDataBaseOpenMode());
  53
  54                 if ((c.getDataBaseOpenMode().equals("initialize"))
  55                                 && (c.isDatabaseLocal()))
  56                         new File(c.getDb4oFilename()).delete();
  57
  58                 if (c.isDatabaseLocal()) {
  59                         openDB();
  60                         System.out.println("DataBase opened");
  61                 } else // c.isDatabaseLocal==false
  62                 {
  63                         openSDB();
  64                         System.out.println("Remote DataBase opened");
  65                 }
  66                 if (c.getDataBaseOpenMode().equals("initialize")) {
  67                         initializeDB();
  68                         System.out.println("DataBase initialized");
  69                 } else // c.getDataBaseOpenMode().equals("open")
  70
  71                 {
  72                         ObjectSet<DB4oManagerAux> res = db
  73                                         .queryByExample(DB4oManagerAux.class);
  74                         ListIterator<DB4oManagerAux> listIter = res.listIterator();
  75                         if (listIter.hasNext())
  76                                 theDB4oManagerAux = (DB4oManagerAux) res.next();
  77                 }
  78         }
  79
  80         private static void openDB() {
  81                 configuration = Db4oEmbedded.newConfiguration();
  82                 configuration.common().activationDepth(c.getActivationDepth());
  83                 configuration.common().updateDepth(c.getUpdateDepth());
  84                 configuration.common().objectClass(Owner.class).cascadeOnUpdate(true);
  85                 configuration.common().objectClass(Owner.class).cascadeOnDelete(true);
  86                 configuration.common().objectClass(RuralHouse.class)
  87                                 .cascadeOnUpdate(true);
  88                 configuration.common().objectClass(Account.class).cascadeOnUpdate(true);
  89                 db = Db4oEmbedded.openFile(configuration, c.getDb4oFilename());
  90         }
  91
  92         private void openSDB() {
  93
  94                 configurationCS = Db4oClientServer.newClientConfiguration();
  95                 configurationCS.common().activationDepth(c.getActivationDepth());
  96                 configurationCS.common().updateDepth(c.getUpdateDepth());
  97                 configurationCS.common().objectClass(Owner.class).cascadeOnDelete(true);
  98                 db = Db4oClientServer.openClient(configurationCS, c.getDatabaseNode(),
  99                                 c.getDatabasePort(), c.getUser(), c.getPassword());
 100
 101         }
 102
 103         class DB4oManagerAux {
 104                 int bookingNumber;
 105                 int offerNumber;
 106
 107                 DB4oManagerAux(int bookingNumber, int offerNumber) {
 108                         this.bookingNumber = bookingNumber;
 109                         this.offerNumber = offerNumber;
 110                 }
 111         }
 112
 113         public static DB4oManager getInstance() throws Exception {
 114                 if (theDB4oManager == null)
 115                         theDB4oManager = new DB4oManager();
 116                 return theDB4oManager;
 117         }
 118
 119         public void initializeDB() {
 120
 121                 try {
 122                         Owner jon = new Owner("Jon", "1349 5677 21 2133567777",
 123                                         "Jon@gmail.com");
 124                         Owner alfredo = new Owner("Alfredo", "4144 0087 23 9700002133",
 125                                         "alfredo@gmail.com");
 126                         jon.addRuralHouse("Ezkioko", "Ezkioko etxea", "Beatriz", 3, 3, 3,
 127                                         3, 3);
 128                         jon.addRuralHouse("Eskiatze", "Eskiatzeko etxea", "Guazate", 4, 4,
 129                                         4, 4, 4);
 130                         alfredo.addRuralHouse("Aitonako", "Casa del abuelo", "Vegas", 5, 5,
 131                                         5, 5, 5);
 132
 133                         alfredo.addRuralHouse("Murgoitz", "", "Cedro", 6, 6, 6, 6, 6);
 134                         Account jonAcc = new Account("1", "1", jon);
 135                         Account alfredoAcc = new Account("userAlfredo", "passAlfredo",
 136                                         alfredo);
 137
 138                         Account admin = new Account("admin", "admin", true);
 139                         db.store(Administrator.getInstance());
 140                         db.store(jonAcc);
 141                         db.store(alfredoAcc);
 142                         db.store(admin);
 143                         db.commit();
 144                 } finally {
 145                         db.close();
 146                 }
 147         }
 148
 149         public void deleteDB() {
 150
 151                 if (c.isDatabaseLocal() == false)
 152                         openSDB();
 153                 else
 154                         openDB();
 155
 156                 try {
 157                         Owner proto = new Owner(null, null, null);
 158                         ObjectSet<Owner> result = db.queryByExample(proto);
 159                         while (result.hasNext()) {
 160                                 Owner o = (Owner) result.next();
 161                                 System.out.println("Deleted owner: " + o.toString());
 162                                 db.delete(o);
 163                         }
 164                         db.commit();
 165                 } finally {
 166                         db.close();
 167                 }
 168         }
 169
 170         public Offer createOffer(RuralHouse ruralHouse, Date firstDay,
 171                         Date lastDay, float price) throws RemoteException, Exception {
 172                 Offer o = null;
 173
 174                 if (c.isDatabaseLocal() == false)
 175                         openSDB();
 176                 else
 177                         openDB();
 178
 179                 try {
 180
 181                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
 182                                         null, null, null);
 183                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 184                         RuralHouse rh = (RuralHouse) result.next();
 185                         o = rh.createOffer(theDB4oManagerAux.offerNumber++, firstDay,
 186                                         lastDay, price);
 187                         db.store(theDB4oManagerAux); // To store the new value for
 188                                                                                         // offerNumber
 189                         db.store(o);
 190                         db.commit();
 191
 192                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 193                         System.out
 194                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
 195                 } finally {
 196                         db.close();
 197                 }
 198                 return o;
 199         }
 200
 201         public void deleteOffer(Offer offer) throws RemoteException, Exception {
 202                 if (c.isDatabaseLocal() == false)
 203                         openSDB();
 204                 else
 205                         openDB();
 206
 207                 try {
 208                         ObjectSet<Offer> of = db.queryByExample(offer);
 209                         RuralHouse rh = of.get(0).getRuralHouse();
 210                         System.out.println(rh.offers.remove(of.get(0)));
 211                         db.store(rh);
 212                         db.commit();
 213
 214                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 215                         System.out
 216                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
 217                 } finally {
 218                         db.close();
 219                 }
 220         }
 221
 222         public Administrator getAdminData() {
 223                 if (c.isDatabaseLocal() == false)
 224                         openSDB();
 225                 else
 226                         openDB();
 227
 228                 try {
 229
 230                         List<Administrator> admL = db.query(new Predicate<Administrator>() {
 231                                 private static final long serialVersionUID = 1L;
 232
 233                                 public boolean match(Administrator admin) {
 234                                         return true;
 235                                 }
 236                         });
 237
 238                         return admL.get(0);
 239                 } finally {
 240                         db.close();
 241
 242                 }
 243
 244         }
 245
 246         public void storeAdmin() {
 247
 248                 if (c.isDatabaseLocal() == false)
 249                         openSDB();
 250                 else
 251                         openDB();
 252                 try {
 253
 254                         List<Administrator> admL = db.query(new Predicate<Administrator>() {
 255                                 /**
 256                                  *
 257                                  */
 258                                 private static final long serialVersionUID = 1L;
 259
 260                                 public boolean match(Administrator admin) {
 261                                         return true;
 262                                 }
 263                         });
 264
 265                         admL.get(0).setAddRequest(
 266                                         Administrator.getInstance().getAddRequest());
 267                         admL.get(0).setRemoveRequest(
 268                                         Administrator.getInstance().getRemoveRequest());
 269                         admL.get(0).setNewOwnerRequest(
 270                                         Administrator.getInstance().getNewOwnerRequest());
 271
 272                         db.commit();
 273
 274                 } catch (Exception e) {
 275
 276                 } finally {
 277                         db.close();
 278                 }
 279
 280         }
 281
 282         /**
 283          * This method creates a book with a corresponding parameters
 284          *
 285          * @param First
 286          *            day, last day, house number and telephone
 287          * @return a book
 288          */
 289         public Vector<Booking> createBooking(RuralHouse ruralHouse, Date firstDate,
 290                         Date lastDate, Client cl) throws OfferCanNotBeBooked {
 291
 292                 if (c.isDatabaseLocal() == false)
 293                         openSDB();
 294                 else
 295                         openDB();
 296
 297                 Vector<Booking> book = new Vector<Booking>();
 298
 299                 try {
 300
 301                         if (c.isDatabaseLocal() == false)
 302                                 openSDB();
 303
 304                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
 305                                         ruralHouse.getDescription(), ruralHouse.getDistrict(), null);
 306                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 307                         RuralHouse rh = (RuralHouse) result.next();
 308
 309                         Offer offer;
 310                         offer = rh.findOffer(firstDate, lastDate);
 311
 312                         if (offer != null) {
 313                                 offer.createBooking(theDB4oManagerAux.bookingNumber++, cl);
 314                                 db.store(theDB4oManagerAux); // To store the new value for
 315                                                                                                 // bookingNumber
 316
 317                                 db.store(offer);
 318                                 db.commit();
 319                                 book = offer.getBookings();
 320
 321                         }
 322
 323                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 324                         System.out
 325                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createBooking");
 326                 } catch (Exception exc) {
 327                         exc.printStackTrace();
 328                 } finally {
 329                         db.close();
 330                 }
 331                 return book;
 332         }
 333
 334         /**
 335          * This method existing owners
 336          *
 337          */
 338         public Vector<Owner> getOwners() throws RemoteException, Exception {
 339
 340                 if (c.isDatabaseLocal() == false)
 341                         openSDB();
 342                 else
 343                         openDB();
 344
 345                 try {
 346                         Owner proto = new Owner(null, null, null);
 347                         ObjectSet<Owner> result = db.queryByExample(proto);
 348                         Vector<Owner> owners = new Vector<Owner>();
 349                         while (result.hasNext())
 350                                 owners.add((Owner) result.next());
 351                         return owners;
 352                 } finally {
 353                         db.close();
 354                 }
 355         }
 356
 357         public Vector<RuralHouse> getAllRuralHouses() throws RemoteException,
 358                         Exception {
 359
 360                 if (c.isDatabaseLocal() == false)
 361                         openSDB();
 362                 else
 363                         openDB();
 364
 365                 try {
 366                         RuralHouse proto = new RuralHouse(null, null, null, null, null);
 367                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 368                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 369                         while (result.hasNext())
 370                                 ruralHouses.add((RuralHouse) result.next());
 371                         return ruralHouses;
 372                 } finally {
 373                         db.close();
 374                 }
 375         }
 376
 377         public boolean existsOverlappingOffer(RuralHouse rh, Date firstDay,
 378                         Date lastDay) throws RemoteException, OverlappingOfferExists {
 379
 380                 if (c.isDatabaseLocal() == false)
 381                         openSDB();
 382                 else
 383                         openDB();
 384
 385                 try {
 386
 387                         RuralHouse rhn = (RuralHouse) db.queryByExample(
 388                                         new RuralHouse(rh.getHouseName(), null, null, null, null))
 389                                         .next();
 390                         if (rhn.overlapsWith(firstDay, lastDay) != null)
 391                                 throw new OverlappingOfferExists();
 392                         else
 393                                 return false;
 394                 } finally {
 395                         db.close();
 396                 }
 397         }
 398
 399         public static ObjectContainer getContainer() {
 400                 return db;
 401         }
 402
 403         public void close() {
 404                 db.close();
 405                 System.out.println("DataBase closed");
 406         }
 407
 408         public String toString() {
 409                 return "bookingNumber=" + bookingNumber + " offerNumber=" + offerNumber;
 410         }
 411
 412         /**
 413          * @param usr
 414          * @param ps
 415          * @return
 416          * @throws RemoteException
 417          * @throws Exception
 418          */
 419         public Vector<Account> getAccount(Account proto) throws RemoteException,
 420                         Exception {
 421
 422                 if (c.isDatabaseLocal() == false)
 423                         openSDB();
 424                 else
 425                         openDB();
 426
 427                 try {
 428                         ObjectSet<Account> result = db.queryByExample(proto);
 429                         Vector<Account> accounts = new Vector<Account>();
 430                         while (result.hasNext())
 431                                 accounts.add((Account) result.next());
 432                         return accounts;
 433                 } finally {
 434                         db.close();
 435                 }
 436         }
 437
 438         /**
 439          * @param rh
 440          */
 441         public boolean storeRuralHouses(RuralHouse rh) {
 442
 443                 if (c.isDatabaseLocal() == false)
 444                         openSDB();
 445                 else
 446                         openDB();
 447
 448                 boolean stored = false;
 449                 RuralHouse house = new RuralHouse(rh.getHouseName(), null, null, null,
 450                                 null);
 451                 try {
 452                         ObjectSet<RuralHouse> result = db.queryByExample(house);
 453                         if (result.isEmpty()) {
 454                                 Owner ow = (Owner) db.queryByExample(rh.getOwner()).get(0);
 455                                 rh.setOwner(ow);
 456                                 ow.addRuralHouse(rh);
 457                                 db.store(rh);
 458                                 db.commit();
 459                                 stored = true;
 460                         } else {
 461                                 db.delete(result.get(0));
 462                                 db.store(rh);
 463                                 db.commit();
 464                                 stored = true;
 465                         }
 466                 } finally {
 467                         db.close();
 468                 }
 469                 return stored;
 470         }
 471
 472         public void removeHouse(RuralHouse rh, Owner owner) {
 473
 474                 if (c.isDatabaseLocal() == false)
 475                         openSDB();
 476                 else
 477                         openDB();
 478                 try {
 479                         ObjectSet<Owner> result = db.queryByExample(owner);
 480                         ObjectSet<RuralHouse> rhs = db.queryByExample(rh);
 481                         if (!rhs.isEmpty()) {
 482                                 Owner found = result.get(0);
 483                                 found.getRuralHouses().remove(rhs.get(0));
 484                                 db.delete(rhs.get(0));
 485                                 db.store(found);
 486                                 db.commit();
 487                         }
 488                 } catch (Exception exc) {
 489                         exc.printStackTrace();
 490                 } finally {
 491                         db.close();
 492                 }
 493
 494         }
 495
 496         public Vector<RuralHouse> getRuralHouses(String name, String town,
 497                         int nBed, int nKit, int nBath, int nPark, int nLiv) {
 498                 HouseFeatures fea = new HouseFeatures(nBed, nKit, nBath, nLiv, nPark);
 499                 RuralHouse rh = new RuralHouse(name, null, null, town, fea);
 500                 if (c.isDatabaseLocal() == false)
 501                         openSDB();
 502                 else
 503                         openDB();
 504
 505                 try {
 506                         ObjectSet<RuralHouse> result = db.queryByExample(rh);
 507                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 508                         while (result.hasNext())
 509                                 ruralHouses.add(result.next());
 510                         db.close();
 511                         return ruralHouses;
 512                 } catch (NullPointerException e) {
 513                         return null;
 514                 }
 515
 516         }
 517
 518         public boolean addAccount(Account acc) {
 519                 if (c.isDatabaseLocal() == false)
 520                         openSDB();
 521                 else
 522                         openDB();
 523
 524                 try {
 525                         ObjectSet<Account> result = db.queryByExample(new Account(acc
 526                                         .getUsername()));
 527                         if (result.isEmpty()) {
 528                                 db.store(acc);
 529                                 db.commit();
 530                                 return true;
 531                         }
 532                 } catch (Exception exc) {
 533                         exc.printStackTrace();
 534                 } finally {
 535                         db.close();
 536                 }
 537                 return false;
 538         }
 539
 540         // TODO remove account
 541
 542         public boolean removeAccount(Account acc) {
 543                 if (c.isDatabaseLocal() == false)
 544                         openSDB();
 545                 else
 546                         openDB();
 547
 548                 try {
 549                         ObjectSet<Account> result = db.queryByExample(new Account(acc
 550                                         .getUsername()));
 551                         if (!result.isEmpty()) {
 552                                 db.delete(result.get(0));
 553                                 ;
 554                                 db.commit();
 555                                 return true;
 556                         }
 557                 } catch (Exception exc) {
 558                         exc.printStackTrace();
 559                 } finally {
 560                         db.close();
 561                 }
 562                 return false;
 563         }
 564
 565         // TODO this method should be improved.
 566         public void acceptBooking(Offer of) {
 567                 Offer off = new Offer(of.getOfferNumber(), of.getRuralHouse(),
 568                                 of.getFirstDay(), of.getLastDay(), of.getPrice());
 569                 if (c.isDatabaseLocal() == false)
 570                         openSDB();
 571                 else
 572                         openDB();
 573
 574                 try {
 575                         ObjectSet<Offer> result = db.queryByExample(off);
 576                         this.deleteOffer(result.get(0));
 577                         db.store(of);
 578                         db.close();
 579
 580                 } catch (Exception e) {
 581                         e.printStackTrace();
 582                         ;
 583                 }
 584         }
 585
 586         public void removeBooking(Booking b) {
 587                 if (c.isDatabaseLocal() == false)
 588                         openSDB();
 589                 else
 590                         openDB();
 591                 try {
 592                         ObjectSet<Booking> result = db.queryByExample(b);
 593                         ObjectSet<Client> result2 = db.queryByExample(b.getClient());
 594                         db.delete(result.get(0));
 595                         db.delete(result2.get(0));
 596                         db.commit();
 597                 } catch (Exception e) {
 598                         e.printStackTrace();
 599                         ;
 600                 } finally {
 601                         db.close();
 602                 }
 603
 604         }
 605 }