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
 139                         Account admin = new Account("admin", "admin", true);
 140                         db.store(Administrator.getInstance());
 141                         db.store(jonAcc);
 142                         db.store(alfredoAcc);
 143                         db.store(admin);
 144                         db.commit();
 145                 } finally {
 146                         db.close();
 147                 }
 148         }
 149
 150         public void deleteDB() {
 151
 152                 if (c.isDatabaseLocal() == false)
 153                         openSDB();
 154                 else
 155                         openDB();
 156
 157                 try {
 158                         Owner proto = new Owner(null, null, null);
 159                         ObjectSet<Owner> result = db.queryByExample(proto);
 160                         while (result.hasNext()) {
 161                                 Owner o = (Owner) result.next();
 162                                 System.out.println("Deleted owner: " + o.toString());
 163                                 db.delete(o);
 164                         }
 165                         db.commit();
 166                 } finally {
 167                         db.close();
 168                 }
 169         }
 170
 171         public Offer createOffer(RuralHouse ruralHouse, Date firstDay,
 172                         Date lastDay, float price) throws RemoteException, Exception {
 173                 Offer o = null;
 174
 175                 if (c.isDatabaseLocal() == false)
 176                         openSDB();
 177                 else
 178                         openDB();
 179
 180                 try {
 181
 182                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
 183                                         null, null, null);
 184                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 185                         RuralHouse rh = (RuralHouse) result.next();
 186                         o = rh.createOffer(theDB4oManagerAux.offerNumber++, firstDay,
 187                                         lastDay, price);
 188                         db.store(theDB4oManagerAux); // To store the new value for
 189                                                                                         // offerNumber
 190                         db.store(o);
 191                         db.commit();
 192
 193                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 194                         System.out
 195                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
 196                 } finally {
 197                         db.close();
 198                 }
 199                 return o;
 200         }
 201
 202         public void deleteOffer(Offer offer) throws RemoteException, Exception {
 203                 if (c.isDatabaseLocal() == false)
 204                         openSDB();
 205                 else
 206                         openDB();
 207
 208                 try {
 209                         ObjectSet<Offer> of = db.queryByExample(offer);
 210                         RuralHouse rh = of.get(0).getRuralHouse();
 211                         System.out.println(rh.offers.remove(of.get(0)));
 212                         db.store(rh);
 213                         db.commit();
 214
 215                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 216                         System.out
 217                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
 218                 } finally {
 219                         db.close();
 220                 }
 221         }
 222
 223
 224
 225         public Administrator getAdminData(){
 226                 if (c.isDatabaseLocal() == false)
 227                         openSDB();
 228                 else
 229                         openDB();
 230
 231                 try {
 232
 233
 234                         List<Administrator> admL = db.query(new Predicate<Administrator>(){
 235                                 private static final long serialVersionUID = 1L;
 236
 237                                 public boolean match(Administrator admin) {
 238                                         return true;
 239                                 }
 240                         });
 241
 242
 243
 244                         return admL.get(0);
 245                 }
 246                 finally {
 247                         db.close();
 248
 249                 }
 250
 251         }
 252
 253         public void storeAdmin() {
 254
 255                 if (c.isDatabaseLocal() == false)
 256                         openSDB();
 257                 else
 258                         openDB();
 259                 try {
 260
 261                         List<Administrator> admL = db.query(new Predicate<Administrator>() {
 262                                 /**
 263                                  *
 264                                  */
 265                                 private static final long serialVersionUID = 1L;
 266
 267                                 public boolean match(Administrator admin) {
 268                                         return true;
 269                                 }
 270                         });
 271
 272                         admL.get(0).setAddRequest(
 273                                         Administrator.getInstance().getAddRequest());
 274                         admL.get(0).setRemoveRequest(
 275                                         Administrator.getInstance().getRemoveRequest());
 276                         admL.get(0).setNewOwnerRequest(
 277                                         Administrator.getInstance().getNewOwnerRequest());
 278
 279                         db.commit();
 280
 281                 } catch (Exception e) {
 282
 283                 } finally {
 284                         db.close();
 285                 }
 286
 287         }
 288
 289         /**
 290          * This method creates a book with a corresponding parameters
 291          *
 292          * @param First
 293          *            day, last day, house number and telephone
 294          * @return a book
 295          */
 296         public Vector<Booking> createBooking(RuralHouse ruralHouse, Date firstDate,
 297                         Date lastDate, Client cl) throws OfferCanNotBeBooked {
 298
 299                 if (c.isDatabaseLocal() == false)
 300                         openSDB();
 301                 else
 302                         openDB();
 303
 304                 Vector<Booking> book = new Vector<Booking>() ;
 305
 306                 try {
 307
 308                         if (c.isDatabaseLocal() == false)
 309                                 openSDB();
 310
 311                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
 312                                         ruralHouse.getDescription(), ruralHouse.getDistrict(), null);
 313                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 314                         RuralHouse rh = (RuralHouse) result.next();
 315
 316                         Offer offer;
 317                         offer = rh.findOffer(firstDate, lastDate);
 318
 319                         if (offer != null) {
 320                                 offer.createBooking(theDB4oManagerAux.bookingNumber++, cl);
 321                                 db.store(theDB4oManagerAux); // To store the new value for
 322                                                                                                 // bookingNumber
 323
 324                                 db.store(offer);
 325                                 db.commit();
 326                                 book = offer.getBookings();
 327
 328                         }
 329
 330                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 331                         System.out
 332                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createBooking");
 333                 } catch (Exception exc) {
 334                         exc.printStackTrace();
 335                 } finally {
 336                         db.close();
 337                 }
 338                 return book;
 339         }
 340
 341         /**
 342          * This method existing owners
 343          *
 344          */
 345         public Vector<Owner> getOwners() throws RemoteException, Exception {
 346
 347                 if (c.isDatabaseLocal() == false)
 348                         openSDB();
 349                 else
 350                         openDB();
 351
 352                 try {
 353                         Owner proto = new Owner(null, null, null);
 354                         ObjectSet<Owner> result = db.queryByExample(proto);
 355                         Vector<Owner> owners = new Vector<Owner>();
 356                         while (result.hasNext())
 357                                 owners.add((Owner) result.next());
 358                         return owners;
 359                 } finally {
 360                         db.close();
 361                 }
 362         }
 363
 364         public Vector<RuralHouse> getAllRuralHouses() throws RemoteException,
 365                         Exception {
 366
 367                 if (c.isDatabaseLocal() == false)
 368                         openSDB();
 369                 else
 370                         openDB();
 371
 372                 try {
 373                         RuralHouse proto = new RuralHouse(null, null, null, null, null);
 374                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 375                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 376                         while (result.hasNext())
 377                                 ruralHouses.add((RuralHouse) result.next());
 378                         return ruralHouses;
 379                 } finally {
 380                         db.close();
 381                 }
 382         }
 383
 384         public boolean existsOverlappingOffer(RuralHouse rh, Date firstDay,
 385                         Date lastDay) throws RemoteException, OverlappingOfferExists {
 386
 387                 if (c.isDatabaseLocal() == false)
 388                         openSDB();
 389                 else
 390                         openDB();
 391
 392                 try {
 393
 394                         RuralHouse rhn = (RuralHouse) db.queryByExample(
 395                                         new RuralHouse(rh.getHouseName(), null, null, null, null))
 396                                         .next();
 397                         if (rhn.overlapsWith(firstDay, lastDay) != null)
 398                                 throw new OverlappingOfferExists();
 399                         else
 400                                 return false;
 401                 } finally {
 402                         db.close();
 403                 }
 404         }
 405
 406         public static ObjectContainer getContainer() {
 407                 return db;
 408         }
 409
 410         public void close() {
 411                 db.close();
 412                 System.out.println("DataBase closed");
 413         }
 414
 415         public String toString() {
 416                 return "bookingNumber=" + bookingNumber + " offerNumber=" + offerNumber;
 417         }
 418
 419         /**
 420          * @param usr
 421          * @param ps
 422          * @return
 423          * @throws RemoteException
 424          * @throws Exception
 425          */
 426         public Vector<Account> getAccount(Account proto) throws RemoteException,
 427                         Exception {
 428
 429                 if (c.isDatabaseLocal() == false)
 430                         openSDB();
 431                 else
 432                         openDB();
 433
 434                 try {
 435                         ObjectSet<Account> result = db.queryByExample(proto);
 436                         Vector<Account> accounts = new Vector<Account>();
 437                         while (result.hasNext())
 438                                 accounts.add((Account) result.next());
 439                         return accounts;
 440                 } finally {
 441                         db.close();
 442                 }
 443         }
 444
 445         /**
 446          * @param rh
 447          */
 448         public boolean storeRuralHouses(RuralHouse rh) {
 449
 450                 if (c.isDatabaseLocal() == false)
 451                         openSDB();
 452                 else
 453                         openDB();
 454
 455                 boolean stored = false;
 456                 RuralHouse house = new RuralHouse(rh.getHouseName(), null, null, null,
 457                                 null);
 458                 try {
 459                         ObjectSet<RuralHouse> result = db.queryByExample(house);
 460                         if (result.isEmpty()) {
 461                                 Owner ow = (Owner) db.queryByExample(rh.getOwner()).get(0);
 462                                 rh.setOwner(ow);
 463                                 ow.addRuralHouse(rh);
 464                                 db.store(rh);
 465                                 db.commit();
 466                                 stored = true;
 467                         } else {
 468                                 db.delete(result.get(0));
 469                                 db.store(rh);
 470                                 db.commit();
 471                                 stored = true;
 472                         }
 473                 } finally {
 474                         db.close();
 475                 }
 476                 return stored;
 477         }
 478
 479         public void removeHouse(RuralHouse rh, Owner owner) {
 480
 481                 if (c.isDatabaseLocal() == false)
 482                         openSDB();
 483                 else
 484                         openDB();
 485                 try {
 486                         ObjectSet<Owner> result = db.queryByExample(owner);
 487                         ObjectSet<RuralHouse> rhs = db.queryByExample(rh);
 488                         if (!rhs.isEmpty()) {
 489                                 Owner found = result.get(0);
 490                                 found.getRuralHouses().remove(rhs.get(0));
 491                                 db.delete(rhs.get(0));
 492                                 db.store(found);
 493                                 db.commit();
 494                         }
 495                 } catch (Exception exc) {
 496                         exc.printStackTrace();
 497                 } finally {
 498                         db.close();
 499                 }
 500
 501         }
 502
 503         public Vector<RuralHouse> getRuralHouses(String name, String town,
 504                         int nBed, int nKit, int nBath, int nPark, int nLiv) {
 505                 HouseFeatures fea = new HouseFeatures(nBed, nKit, nBath, nLiv, nPark);
 506                 RuralHouse rh = new RuralHouse(name, null, null, town, fea);
 507                 if (c.isDatabaseLocal() == false)
 508                         openSDB();
 509                 else
 510                         openDB();
 511
 512                 try {
 513                         ObjectSet<RuralHouse> result = db.queryByExample(rh);
 514                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 515                         while (result.hasNext())
 516                                 ruralHouses.add(result.next());
 517                         db.close();
 518                         return ruralHouses;
 519                 } catch (NullPointerException e) {
 520                         return null;
 521                 }
 522
 523         }
 524
 525         public boolean addAccount(Account acc) {
 526                 if (c.isDatabaseLocal() == false)
 527                         openSDB();
 528                 else
 529                         openDB();
 530
 531                 try {
 532                         // TODO realize if there is another account with same username.
 533                         // Quite difficult with the f***ing salt
 534                         db.store(acc);
 535                         db.commit();
 536                 } catch (Exception exc) {
 537                         exc.printStackTrace();
 538                 } finally {
 539                         db.close();
 540                 }
 541                 return true;
 542         }
 543
 544         // TODO remove account
 545
 546         public boolean removeAccount(Account acc) {
 547                 return false;
 548         }
 549
 550         //TODO this method should be improved.
 551         public void acceptBooking(Offer of){
 552                 Offer off = new Offer(of.getOfferNumber(),of.getRuralHouse(),of.getFirstDay(),of.getLastDay(),of.getPrice());
 553                 if (c.isDatabaseLocal() == false)
 554                         openSDB();
 555                 else
 556                         openDB();
 557
 558                 try {
 559                         ObjectSet<Offer> result = db.queryByExample(off);
 560                         this.deleteOffer(result.get(0));
 561                         db.store(of);
 562                         db.close();
 563
 564                 } catch (Exception e) {
 565                         e.printStackTrace();;
 566                 }
 567         }
 568
 569         public void removeBooking(Booking b){
 570                 if (c.isDatabaseLocal() == false)
 571                         openSDB();
 572                 else
 573                         openDB();
 574                 try {
 575                         ObjectSet<Booking> result = db.queryByExample(b);
 576                         ObjectSet<Client> result2= db.queryByExample(b.getClient());
 577                         db.delete(result.get(0));
 578                         db.delete(result2.get(0));
 579                         db.commit();
 580                 } catch (Exception e) {
 581                         e.printStackTrace();;
 582                 }finally{
 583                         db.close();
 584                 }
 585
 586
 587         }
 588 }