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
 142                         db.store(jonAcc);
 143                         db.store(alfredoAcc);
 144                         db.store(admin);
 145                         db.commit();
 146                 } finally {
 147                         db.close();
 148                 }
 149         }
 150
 151         public void deleteDB() {
 152
 153                 if (c.isDatabaseLocal() == false)
 154                         openSDB();
 155                 else
 156                         openDB();
 157
 158                 try {
 159                         Owner proto = new Owner(null, null, null);
 160                         ObjectSet<Owner> result = db.queryByExample(proto);
 161                         while (result.hasNext()) {
 162                                 Owner o = (Owner) result.next();
 163                                 System.out.println("Deleted owner: " + o.toString());
 164                                 db.delete(o);
 165                         }
 166                         db.commit();
 167                 } finally {
 168                         db.close();
 169                 }
 170         }
 171
 172         public Offer createOffer(RuralHouse ruralHouse, Date firstDay,
 173                         Date lastDay, float price) throws RemoteException, Exception {
 174                 Offer o = null;
 175
 176                 if (c.isDatabaseLocal() == false)
 177                         openSDB();
 178                 else
 179                         openDB();
 180
 181                 try {
 182
 183                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
 184                                         null, null, null);
 185                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 186                         RuralHouse rh = (RuralHouse) result.next();
 187                         o = rh.createOffer(theDB4oManagerAux.offerNumber++, firstDay,
 188                                         lastDay, price);
 189                         db.store(theDB4oManagerAux); // To store the new value for
 190                                                                                         // offerNumber
 191                         db.store(o);
 192                         db.commit();
 193
 194                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 195                         System.out
 196                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
 197                 } finally {
 198                         db.close();
 199                 }
 200                 return o;
 201         }
 202
 203         public void deleteOffer(Offer offer) throws RemoteException, Exception {
 204                 if (c.isDatabaseLocal() == false)
 205                         openSDB();
 206                 else
 207                         openDB();
 208
 209                 try {
 210                         ObjectSet<Offer> of = db.queryByExample(offer);
 211                         RuralHouse rh = of.get(0).getRuralHouse();
 212                         System.out.println(rh.offers.remove(of.get(0)));
 213                         db.store(rh);
 214                         db.commit();
 215
 216                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 217                         System.out
 218                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createOffer");
 219                 } finally {
 220                         db.close();
 221                 }
 222         }
 223
 224
 225
 226         public Administrator getAdminData(){
 227                 if (c.isDatabaseLocal() == false)
 228                         openSDB();
 229                 else
 230                         openDB();
 231
 232                 try {
 233
 234
 235                         List<Administrator> admL = db.query(new Predicate<Administrator>(){
 236                                 private static final long serialVersionUID = 1L;
 237
 238                                 public boolean match(Administrator admin) {
 239                                         return true;
 240                                 }
 241                         });
 242
 243
 244
 245                         return admL.get(0);
 246                 }
 247                 finally {
 248                         db.close();
 249
 250                 }
 251
 252         }
 253
 254         public void storeAdmin() {
 255
 256                 if (c.isDatabaseLocal() == false)
 257                         openSDB();
 258                 else
 259                         openDB();
 260                 try {
 261
 262                         List<Administrator> admL = db.query(new Predicate<Administrator>() {
 263                                 /**
 264                                  *
 265                                  */
 266                                 private static final long serialVersionUID = 1L;
 267
 268                                 public boolean match(Administrator admin) {
 269                                         return true;
 270                                 }
 271                         });
 272
 273                         admL.get(0).setAddRequest(
 274                                         Administrator.getInstance().getAddRequest());
 275                         admL.get(0).setRemoveRequest(
 276                                         Administrator.getInstance().getRemoveRequest());
 277                         admL.get(0).setNewOwnerRequest(
 278                                         Administrator.getInstance().getNewOwnerRequest());
 279
 280                         db.commit();
 281
 282                 } catch (Exception e) {
 283
 284                 } finally {
 285                         db.close();
 286                 }
 287
 288         }
 289
 290         /**
 291          * This method creates a book with a corresponding parameters
 292          *
 293          * @param First
 294          *            day, last day, house number and telephone
 295          * @return a book
 296          */
 297         public Vector<Booking> createBooking(RuralHouse ruralHouse, Date firstDate,
 298                         Date lastDate, Client cl) throws OfferCanNotBeBooked {
 299
 300                 if (c.isDatabaseLocal() == false)
 301                         openSDB();
 302                 else
 303                         openDB();
 304
 305                 Vector<Booking> book = new Vector<Booking>() ;
 306
 307                 try {
 308
 309                         if (c.isDatabaseLocal() == false)
 310                                 openSDB();
 311
 312                         RuralHouse proto = new RuralHouse(ruralHouse.getHouseName(), null,
 313                                         ruralHouse.getDescription(), ruralHouse.getDistrict(), null);
 314                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 315                         RuralHouse rh = (RuralHouse) result.next();
 316
 317                         Offer offer;
 318                         offer = rh.findOffer(firstDate, lastDate);
 319
 320                         if (offer != null) {
 321                                 offer.createBooking(theDB4oManagerAux.bookingNumber++, cl);
 322                                 db.store(theDB4oManagerAux); // To store the new value for
 323                                                                                                 // bookingNumber
 324
 325                                 db.store(offer);
 326                                 db.commit();
 327                                 book = offer.getBookings();
 328
 329                         }
 330
 331                 } catch (com.db4o.ext.ObjectNotStorableException e) {
 332                         System.out
 333                                         .println("Error: com.db4o.ext.ObjectNotStorableException in createBooking");
 334                 } catch (Exception exc) {
 335                         exc.printStackTrace();
 336                 } finally {
 337                         db.close();
 338                 }
 339                 return book;
 340         }
 341
 342         /**
 343          * This method existing owners
 344          *
 345          */
 346         public Vector<Owner> getOwners() throws RemoteException, Exception {
 347
 348                 if (c.isDatabaseLocal() == false)
 349                         openSDB();
 350                 else
 351                         openDB();
 352
 353                 try {
 354                         Owner proto = new Owner(null, null, null);
 355                         ObjectSet<Owner> result = db.queryByExample(proto);
 356                         Vector<Owner> owners = new Vector<Owner>();
 357                         while (result.hasNext())
 358                                 owners.add((Owner) result.next());
 359                         return owners;
 360                 } finally {
 361                         db.close();
 362                 }
 363         }
 364
 365         public Vector<RuralHouse> getAllRuralHouses() throws RemoteException,
 366                         Exception {
 367
 368                 if (c.isDatabaseLocal() == false)
 369                         openSDB();
 370                 else
 371                         openDB();
 372
 373                 try {
 374                         RuralHouse proto = new RuralHouse(null, null, null, null, null);
 375                         ObjectSet<RuralHouse> result = db.queryByExample(proto);
 376                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 377                         while (result.hasNext())
 378                                 ruralHouses.add((RuralHouse) result.next());
 379                         return ruralHouses;
 380                 } finally {
 381                         db.close();
 382                 }
 383         }
 384
 385         public boolean existsOverlappingOffer(RuralHouse rh, Date firstDay,
 386                         Date lastDay) throws RemoteException, OverlappingOfferExists {
 387
 388                 if (c.isDatabaseLocal() == false)
 389                         openSDB();
 390                 else
 391                         openDB();
 392
 393                 try {
 394
 395                         RuralHouse rhn = (RuralHouse) db.queryByExample(
 396                                         new RuralHouse(rh.getHouseName(), null, null, null, null))
 397                                         .next();
 398                         if (rhn.overlapsWith(firstDay, lastDay) != null)
 399                                 throw new OverlappingOfferExists();
 400                         else
 401                                 return false;
 402                 } finally {
 403                         db.close();
 404                 }
 405         }
 406
 407         public static ObjectContainer getContainer() {
 408                 return db;
 409         }
 410
 411         public void close() {
 412                 db.close();
 413                 System.out.println("DataBase closed");
 414         }
 415
 416         public String toString() {
 417                 return "bookingNumber=" + bookingNumber + " offerNumber=" + offerNumber;
 418         }
 419
 420         /**
 421          * @param usr
 422          * @param ps
 423          * @return
 424          * @throws RemoteException
 425          * @throws Exception
 426          */
 427         public Vector<Account> getAccount(Account proto) throws RemoteException,
 428                         Exception {
 429
 430                 if (c.isDatabaseLocal() == false)
 431                         openSDB();
 432                 else
 433                         openDB();
 434
 435                 try {
 436                         ObjectSet<Account> result = db.queryByExample(proto);
 437                         Vector<Account> accounts = new Vector<Account>();
 438                         while (result.hasNext())
 439                                 accounts.add((Account) result.next());
 440                         return accounts;
 441                 } finally {
 442                         db.close();
 443                 }
 444         }
 445
 446         /**
 447          * @param rh
 448          */
 449         public boolean storeRuralHouses(RuralHouse rh) {
 450
 451                 if (c.isDatabaseLocal() == false)
 452                         openSDB();
 453                 else
 454                         openDB();
 455
 456                 boolean stored = false;
 457                 RuralHouse house = new RuralHouse(rh.getHouseName(), null, null, null,
 458                                 null);
 459                 try {
 460                         ObjectSet<RuralHouse> result = db.queryByExample(house);
 461                         if (result.isEmpty()) {
 462                                 Owner ow = (Owner) db.queryByExample(rh.getOwner()).get(0);
 463                                 rh.setOwner(ow);
 464                                 ow.addRuralHouse(rh);
 465                                 db.store(rh);
 466                                 db.commit();
 467                                 stored = true;
 468                         } else {
 469                                 db.delete(result.get(0));
 470                                 db.store(rh);
 471                                 db.commit();
 472                                 stored = true;
 473                         }
 474                 } finally {
 475                         db.close();
 476                 }
 477                 return stored;
 478         }
 479
 480         public void removeHouse(RuralHouse rh, Owner owner) {
 481
 482                 if (c.isDatabaseLocal() == false)
 483                         openSDB();
 484                 else
 485                         openDB();
 486                 try {
 487                         ObjectSet<Owner> result = db.queryByExample(owner);
 488                         ObjectSet<RuralHouse> rhs = db.queryByExample(rh);
 489                         if (!rhs.isEmpty()) {
 490                                 Owner found = result.get(0);
 491                                 found.getRuralHouses().remove(rhs.get(0));
 492                                 db.delete(rhs.get(0));
 493                                 db.store(found);
 494                                 db.commit();
 495                         }
 496                 } catch (Exception exc) {
 497                         exc.printStackTrace();
 498                 } finally {
 499                         db.close();
 500                 }
 501
 502         }
 503
 504         public Vector<RuralHouse> getRuralHouses(String name, String town,
 505                         int nBed, int nKit, int nBath, int nPark, int nLiv) {
 506                 HouseFeatures fea = new HouseFeatures(nBed, nKit, nBath, nLiv, nPark);
 507                 RuralHouse rh = new RuralHouse(name, null, null, town, fea);
 508                 if (c.isDatabaseLocal() == false)
 509                         openSDB();
 510                 else
 511                         openDB();
 512
 513                 try {
 514                         ObjectSet<RuralHouse> result = db.queryByExample(rh);
 515                         Vector<RuralHouse> ruralHouses = new Vector<RuralHouse>();
 516                         while (result.hasNext())
 517                                 ruralHouses.add(result.next());
 518                         db.close();
 519                         return ruralHouses;
 520                 } catch (NullPointerException e) {
 521                         return null;
 522                 }
 523
 524         }
 525
 526         public boolean addAccount(Account acc) {
 527                 if (c.isDatabaseLocal() == false)
 528                         openSDB();
 529                 else
 530                         openDB();
 531
 532                 try {
 533                         // TODO realize if there is another account with same username.
 534                         // Quite difficult with the f***ing salt
 535                         db.store(acc);
 536                         db.commit();
 537                 } catch (Exception exc) {
 538                         exc.printStackTrace();
 539                 } finally {
 540                         db.close();
 541                 }
 542                 return true;
 543         }
 544
 545         // TODO remove account
 546
 547         public boolean removeAccount(Account acc) {
 548                 return false;
 549         }
 550
 551         //TODO this method should be improved.
 552         public void acceptBooking(Offer of){
 553                 Offer off = new Offer(of.getOfferNumber(),of.getRuralHouse(),of.getFirstDay(),of.getLastDay(),of.getPrice());
 554                 if (c.isDatabaseLocal() == false)
 555                         openSDB();
 556                 else
 557                         openDB();
 558
 559                 try {
 560                         ObjectSet<Offer> result = db.queryByExample(off);
 561                         this.deleteOffer(result.get(0));
 562                         db.store(of);
 563                         db.close();
 564
 565                 } catch (Exception e) {
 566                         e.printStackTrace();;
 567                 }
 568         }
 569
 570         public void removeBooking(Booking b){
 571                 if (c.isDatabaseLocal() == false)
 572                         openSDB();
 573                 else
 574                         openDB();
 575                 try {
 576                         ObjectSet<Booking> result = db.queryByExample(b);
 577                         ObjectSet<Client> result2= db.queryByExample(b.getClient());
 578                         db.delete(result.get(0));
 579                         db.delete(result2.get(0));
 580                         db.commit();
 581                 } catch (Exception e) {
 582                         e.printStackTrace();;
 583                 }finally{
 584                         db.close();
 585                 }
 586
 587
 588         }
 589 }