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