src/java/org/mxchange/pizzaapplication/application/PizzaServiceApplication.java

   1 /*
   2  * Copyright (C) 2015 Roland Haeder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.pizzaapplication.application;
  18
  19 import org.mxchange.pizzaapplication.exceptions.CategoryTitleAlreadyUsedException;
  20 import java.io.IOException;
  21 import java.lang.reflect.Field;
  22 import java.lang.reflect.InvocationTargetException;
  23 import java.sql.SQLException;
  24 import java.text.MessageFormat;
  25 import java.util.Iterator;
  26 import java.util.Map;
  27 import javax.servlet.ServletContext;
  28 import javax.servlet.ServletException;
  29 import javax.servlet.http.HttpServletRequest;
  30 import javax.servlet.http.HttpSession;
  31 import org.mxchange.jcore.contact.Gender;
  32 import org.mxchange.jcore.exceptions.BadTokenException;
  33 import org.mxchange.jcore.exceptions.CorruptedDatabaseFileException;
  34 import org.mxchange.jcore.exceptions.UnsupportedDatabaseBackendException;
  35 import org.mxchange.pizzaapplication.BasePizzaServiceSystem;
  36 import org.mxchange.pizzaapplication.category.Category;
  37 import org.mxchange.pizzaapplication.customer.Customer;
  38 import org.mxchange.pizzaapplication.customer.PizzaServiceCustomer;
  39 import org.mxchange.pizzaapplication.database.category.PizzaCategoryDatabaseConstants;
  40 import org.mxchange.pizzaapplication.database.frontend.category.CategoryFrontend;
  41 import org.mxchange.pizzaapplication.database.frontend.category.PizzaCategoryDatabaseFrontend;
  42 import org.mxchange.pizzaapplication.database.frontend.product.PizzaProductDatabaseFrontend;
  43 import org.mxchange.pizzaapplication.database.frontend.product.ProductFrontend;
  44 import org.mxchange.pizzaapplication.database.product.PizzaProductDatabaseConstants;
  45 import org.mxchange.pizzaapplication.exceptions.ProductTitleAlreadyUsedException;
  46 import org.mxchange.pizzaapplication.product.Product;
  47
  48 /**
  49  * Main application class
  50  *
  51  * @author Roland Haeder
  52  */
  53 public class PizzaServiceApplication extends BasePizzaServiceSystem implements PizzaApplication {
  54         /**
  55          * Main title
  56          */
  57         public static final String MAIN_TITLE = "Pizza-Service";
  58
  59         /**
  60          * Frontend for products
  61          */
  62         private ProductFrontend productFrontend;
  63
  64         /**
  65          * Frontend for categories
  66          */
  67         private CategoryFrontend categoryFrontend;
  68
  69         /**
  70          * Some singleton getter for this instance. If the instance is not set in
  71          * given application, it will be created.
  72          *
  73          * @param context Servlet context
  74          * @return This instance
  75          * @throws javax.servlet.ServletException If object is not set correctly
  76          */
  77         public static final PizzaApplication getInstance (final ServletContext context) throws ServletException {
  78                 // Check application instance
  79                 if (context == null) {
  80                         // Not set
  81                         throw new NullPointerException("application is null"); //NOI18N
  82                 }
  83
  84                 // Init instance
  85                 PizzaApplication instance = null;
  86
  87                 // Get instance from servlet application (aka. "application scope")
  88                 Object object = context.getAttribute("app"); //NOI18N
  89
  90                 // Is it set?
  91                 if (object instanceof PizzaApplication) {
  92                         // Instance is set, so casting should work
  93                         instance = (PizzaApplication) object;
  94                 } else if (object instanceof Object) {
  95                         // Not correct instance
  96                         throw new ServletException("app is not set correctly"); //NOI18N
  97                 } else {
  98                         try {
  99                                 // "service" is null, so initialize it
 100                                 instance = new PizzaServiceApplication(context);
 101                         } catch (final UnsupportedDatabaseBackendException | SQLException | IOException | BadTokenException ex) {
 102                                 throw new ServletException(ex);
 103                         }
 104
 105                         // And set it here
 106                         context.setAttribute("app", instance); //NOI18N
 107                 }
 108
 109                 // Trace message
 110                 instance.getLogger().trace(MessageFormat.format("instance={0} - EXIT!", instance)); //NOI18N
 111
 112                 // Return it
 113                 return instance;
 114         }
 115
 116         /**
 117          * For debugging purpose
 118          *
 119          * @param args Arguments
 120          */
 121         public static void main (String[] args) {
 122                 // Get instance and start it
 123                 new PizzaServiceApplication().start();
 124         }
 125
 126         /**
 127          * Constructor with servet configuration
 128          *
 129          * @param context Servlet context
 130          */
 131         private PizzaServiceApplication (final ServletContext context) throws UnsupportedDatabaseBackendException, SQLException, IOException, BadTokenException {
 132                 // Temporary initialize default bundle
 133                 // @TODO The JSF may have better internatialization support
 134                 this.initBundle();
 135
 136                 // Initialize properties from config
 137                 this.initProperties(context);
 138
 139                 // Init database frontends
 140                 this.initDatabaseFrontends();
 141         }
 142
 143         /**
 144          * Default constructor
 145          */
 146         private PizzaServiceApplication () {
 147         }
 148
 149         /**
 150          * Calculates total amount of all choosen products
 151          *
 152          * @param request Request instance
 153          * @param session Session instance
 154          * @return Total amount of all choosen products
 155          */
 156         @Override
 157         public int calculateTotalAmount (final HttpServletRequest request, final HttpSession session) throws ServletException {
 158                 // Trace message
 159                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 160
 161                 // Is product and session set?
 162                 if (request == null) {
 163                         // Not set
 164                         throw new NullPointerException("request is null"); //NOI18N
 165                 } else if (session == null) {
 166                         // Not set
 167                         throw new NullPointerException("session is null"); //NOI18N
 168                 }
 169
 170                 // Init/declare total price and iterator
 171                 int totalAmount = 0;
 172                 Iterator<Product> iterator = this.getAvailableProducts();
 173
 174                 // "Walk" over all products
 175                 while (iterator.hasNext()) {
 176                         // Get next product
 177                         Product product = iterator.next();
 178
 179                         // Is this choosen?
 180                         if (this.isProductChoosen(product, request, session)) {
 181                                 // Then add ordered amount
 182                                 this.getLogger().debug(MessageFormat.format("Counting {0} ...", product.getId())); //NOI18N
 183
 184                                 // Getting amount
 185                                 String amount = this.getAmountFromSession(product, session);
 186
 187                                 // Add it up
 188                                 this.getLogger().debug(MessageFormat.format("amount={0}", amount)); //NOI18N
 189                                 totalAmount += Integer.valueOf(amount);
 190                         }
 191                         this.getLogger().debug(MessageFormat.format("product={0},totalAmount={1}", product.getId(), totalAmount)); //NOI18N
 192                 }
 193
 194                 // Trace message
 195                 this.getLogger().trace(MessageFormat.format("totalAmount={0} - EXIT!", totalAmount)); //NOI18N
 196
 197                 // Return total price
 198                 return totalAmount;
 199         }
 200
 201         /**
 202          * Calculates total price of all choosen products
 203          *
 204          * @param request Request instance
 205          * @param session Session instance
 206          * @return Total price of all choosen products
 207          */
 208         @Override
 209         public float calculateTotalPrice (final HttpServletRequest request, final HttpSession session) throws ServletException {
 210                 // Trace message
 211                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 212
 213                 // Is product and session set?
 214                 if (request == null) {
 215                         // Not set
 216                         throw new NullPointerException("request is null"); //NOI18N
 217                 } else if (session == null) {
 218                         // Not set
 219                         throw new NullPointerException("session is null"); //NOI18N
 220                 }
 221
 222                 // Init total price
 223                 float totalPrice = 0.00f;
 224
 225                 // Get iterator
 226                 Iterator<Product> iterator = this.getAvailableProducts();
 227
 228                 // "Walk" over all products
 229                 while (iterator.hasNext()) {
 230                         // Get next product
 231                         Product product = iterator.next();
 232
 233                         // Is this choosen?
 234                         if (this.isProductChoosen(product, request, session)) {
 235                                 // Then add product's total price
 236                                 this.getLogger().debug(MessageFormat.format("Calling getTotalPositionPriceFromRequestSession({0},request,session) ...", product.getId())); //NOI18N
 237                                 totalPrice += this.getTotalPositionPriceFromRequestSession(product, request, session);
 238                         }
 239                         this.getLogger().debug(MessageFormat.format("product={0},totalPrice={1}", product.getId(), totalPrice)); //NOI18N
 240                 }
 241
 242                 // Trace message
 243                 this.getLogger().trace(MessageFormat.format(" totalPrice={0} - EXIT!", totalPrice)); //NOI18N
 244
 245                 // Return total price
 246                 return totalPrice;
 247         }
 248
 249         @Override
 250         public void doBootstrap () {
 251                 throw new UnsupportedOperationException("Not supported yet."); //NOI18N
 252         }
 253
 254         @Override
 255         public void doMainLoop () {
 256                 throw new UnsupportedOperationException("Not supported yet."); //NOI18N
 257         }
 258
 259         @Override
 260         public void doShutdown () {
 261                 throw new UnsupportedOperationException("Not supported yet."); //NOI18N
 262         }
 263
 264         /**
 265          * Some "getter" for amount from session
 266          *
 267          * @param product Product instance
 268          * @param session Session instance
 269          * @return Amount as string
 270          */
 271         @Override
 272         public String getAmountFromSession (final Product product, final HttpSession session) {
 273                 // Trace message
 274                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 275
 276                 // Is product and session set?
 277                 if (product == null) {
 278                         // Not set
 279                         throw new NullPointerException("product is null"); //NOI18N
 280                 } else if (session == null) {
 281                         // Not set
 282                         throw new NullPointerException("session is null"); //NOI18N
 283                 }
 284
 285                 // Get attribute
 286                 Object object = this.getValueFromSession(product, session, HTTP_PARAM_AMOUNT);
 287
 288                 // Is the object null?
 289                 if (object == null) {
 290                         // Trace message
 291                         this.getLogger().trace("Returning 0 - EXIT!"); //NOI18N
 292
 293                         // Not found
 294                         return "0"; //NOI18N
 295                 }
 296
 297                 // Trace message
 298                 this.getLogger().trace(MessageFormat.format("object={0} - EXIT!", object)); //NOI18N
 299
 300                 // Cast to string and return it
 301                 return (String) object;
 302         }
 303
 304         /**
 305          * Some "getter" for HTML code 'checked="checked"' if the product is choosen
 306          *
 307          * @param product Product instance
 308          * @param request Request instance
 309          * @param session Session instance
 310          * @return Whether the product is choosen
 311          */
 312         @Override
 313         public String getCheckedHtmlFromProduct (final Product product, final HttpServletRequest request, final HttpSession session) {
 314                 // Trace message
 315                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 316
 317                 // Is product and session set?
 318                 if (product == null) {
 319                         // Not set
 320                         throw new NullPointerException("product is null"); //NOI18N
 321                 } else if (request == null) {
 322                         // Not set
 323                         throw new NullPointerException("request is null"); //NOI18N
 324                 } else if (session == null) {
 325                         // Not set
 326                         throw new NullPointerException("session is null"); //NOI18N
 327                 }
 328
 329                 // First let's check if the product is choosen
 330                 if (this.isProductChoosen(product, request, session)) {
 331                         // Trace message
 332                         this.getLogger().trace("Returning checked=\"checked\" - EXIT!"); //NOI18N
 333
 334                         // Is choosen
 335                         return "checked=\"checked\""; //NOI18N
 336                 } else {
 337                         // Trace message
 338                         this.getLogger().trace("Returning empty string - EXIT!"); //NOI18N
 339
 340                         // Not choosen
 341                         return ""; //NOI18N
 342                 }
 343         }
 344
 345         /**
 346          * Some "getter" for choose from session
 347          *
 348          * @param product Product instance
 349          * @param session Session instance
 350          * @return Choose as string
 351          */
 352         @Override
 353         public String getChooseFromSession (final Product product, final HttpSession session) {
 354                 // Trace message
 355                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 356
 357                 // Is product and session set?
 358                 if (product == null) {
 359                         // Not set
 360                         throw new NullPointerException("product is null"); //NOI18N
 361                 } else if (session == null) {
 362                         // Not set
 363                         throw new NullPointerException("session is null"); //NOI18N
 364                 }
 365
 366                 // Get attribute
 367                 Object object = this.getValueFromSession(product, session, HTTP_PARAM_CHOOSE);
 368
 369                 // Is the object null?
 370                 if (object == null) {
 371                         // Not found
 372                         this.getLogger().debug(MessageFormat.format("Returning empty string for product={0} ...", product.getId())); //NOI18N
 373                         return ""; //NOI18N
 374                 }
 375
 376                 // Trace message
 377                 this.getLogger().trace(MessageFormat.format("object={0} - CALLED!", object)); //NOI18N
 378
 379                 // Cast to string and return it
 380                 return (String) object;
 381         }
 382
 383         /**
 384          * Some "getter" for HTML code 'disabled="disabled"' for e.g. submit buttons
 385          *
 386          * @param request Request instance
 387          * @param session Session instance
 388          * @return Whether the product is choosen
 389          */
 390         @Override
 391         public String getDisabledHtmlFromSession (final HttpServletRequest request, final HttpSession session) throws ServletException {
 392                 // Trace message
 393                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 394
 395                 // Is product and session set?
 396                 if (request == null) {
 397                         // Not set
 398                         throw new NullPointerException("request is null"); //NOI18N
 399                 } else if (session == null) {
 400                         // Not set
 401                         throw new NullPointerException("session is null"); //NOI18N
 402                 }
 403
 404                 // Is something selected?
 405                 if (this.calculateTotalAmount(request, session) > 0) {
 406                         // Trace message
 407                         this.getLogger().trace("Returning empty string - EXIT!"); //NOI18N
 408
 409                         // Something has been choosen
 410                         return ""; //NOI18N
 411                 } else {
 412                         // Trace message
 413                         this.getLogger().trace("Returning disabled=\"disabled\" - EXIT!"); //NOI18N
 414
 415                         // Nothing choosen yet
 416                         return "disabled=\"disabled\""; //NOI18N
 417                 }
 418         }
 419
 420         /**
 421          * Some "getter" for choosen (checkbox) from session
 422          *
 423          * @param product Product instance
 424          * @param request Request instance
 425          * @param session Session instance
 426          * @return Amount as string
 427          */
 428         @Override
 429         public String getPrintableChoosenFromRequestSession (final Product product, final HttpServletRequest request, final HttpSession session) {
 430                 // Trace message
 431                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 432
 433                 // Is product and session set?
 434                 if (product == null) {
 435                         // Not set
 436                         throw new NullPointerException("product is null"); //NOI18N
 437                 } else if (request == null) {
 438                         // Not set
 439                         throw new NullPointerException("request is null"); //NOI18N
 440                 } else if (session == null) {
 441                         // Not set
 442                         throw new NullPointerException("session is null"); //NOI18N
 443                 }
 444
 445                 // Get element
 446                 this.getLogger().debug(MessageFormat.format("Calling handleChooseFromRequestSession({0},{1},{2}) ...", product.getId(), request, session)); //NOI18N
 447                 String choosen = this.handleChooseFromRequestSession(product, request, session);
 448                 this.getLogger().debug(MessageFormat.format("product={0},choosen={1}", product.getId(), choosen)); //NOI18N
 449
 450                 // Must not be null
 451                 assert(choosen instanceof String): "choosen is null"; //NOI18N
 452
 453                 // Is it empty?
 454                 if (choosen.isEmpty()) {
 455                         // Not choosen
 456                         return "Nein";
 457                 }
 458
 459                 // Get amount
 460                 String amount = this.handleAmountFromRequestSession(product, request, session);
 461                 this.getLogger().debug(MessageFormat.format("product={0},amount={1}", product.getId(), amount)); //NOI18N
 462
 463                 // Must not be null
 464                 assert(amount instanceof String): "amount is null"; //NOI18N
 465
 466                 // Is it empty?
 467                 if (amount.isEmpty() || "0".equals(amount)) { //NOI18N
 468                         // Choosen, but no amount
 469                         return "Nein";
 470                 } else {
 471                         // Is choosen
 472                         return "Ja";
 473                 }
 474         }
 475
 476         /**
 477          * Checks if given Product instance is available and returns a printable
 478          * (human-readable) string.
 479          *
 480          * @param product Product instance to check
 481          * @return Human-readable version of product availability
 482          */
 483         @Override
 484         public String getPrintableProduktAvailability (final Product product) {
 485                 // Trace message
 486                 this.getLogger().trace(MessageFormat.format("product={0} - CALLED!", product)); //NOI18N
 487
 488                 // Is it null?
 489                 if (product == null) {
 490                         // Should not be null
 491                         throw new NullPointerException("product is null"); //NOI18N
 492                 }
 493
 494                 // Get availability
 495                 if (product.getAvailable() == true) {
 496                         // Is available
 497                         return "Ja";
 498                 } else {
 499                         // Not, not for public
 500                         return "Nein";
 501                 }
 502         }
 503
 504         /**
 505          * Some getter for printable value from session or an empty string for null.
 506          *
 507          * @param session Session instance
 508          * @param key Key to get
 509          * @return Value from key, empty string for null
 510          */
 511         @Override
 512         public Object getPrintableValeFromSession (final HttpSession session, final String key) {
 513                 // Trace message
 514                 this.getLogger().trace(MessageFormat.format("session={0},key={1} - CALLED", session, key)); //NOI18N
 515
 516                 // Are both parameter not null?
 517                 if (session == null) {
 518                         // Abort here
 519                         throw new NullPointerException("session is null"); //NOI18N
 520                 } else  if (key == null) {
 521                         // Abort here
 522                         throw new NullPointerException("key is null"); //NOI18N
 523                 }
 524
 525                 // Now get it
 526                 Object value = this.getValueFromSession(session, key);
 527
 528                 // Debug message
 529                 this.getLogger().debug(MessageFormat.format("value={0}", value)); //NOI18N
 530
 531                 // Trace message
 532                 this.getLogger().trace(MessageFormat.format("Calling this.convertNullToEmpty({0}) ... - EXIT!", value)); //NOI18N
 533
 534                 // Return actual value
 535                 return this.convertNullToEmpty(value);
 536         }
 537
 538         /**
 539          * Some "getter" for a an array of only available products
 540          *
 541          * @return All products
 542          */
 543         @Override
 544         public Iterator<Product> getAvailableProducts () throws ServletException {
 545                 try {
 546                         // Ask frontend for a list of products
 547                         return this.productFrontend.getAvailableProducts();
 548                 } catch (final IOException | BadTokenException | SQLException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
 549                         throw new ServletException(ex);
 550                 }
 551         }
 552
 553         /**
 554          * Some "getter" for a an array of all products
 555          *
 556          * @return All products
 557          */
 558         @Override
 559         public Iterator<Product> getAllProducts () throws ServletException {
 560                 try {
 561                         // Ask frontend for a list of products
 562                         return this.productFrontend.getAllProducts();
 563                 } catch (final IOException | BadTokenException | SQLException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
 564                         throw new ServletException(ex);
 565                 }
 566         }
 567
 568         /**
 569          * Some "getter" for a an array of all categories
 570          *
 571          * @return All categories
 572          */
 573         @Override
 574         public Iterator<Category> getCategories () throws ServletException {
 575                 try {
 576                         // Ask frontend for a list of categories
 577                         return this.categoryFrontend.getCategories();
 578                 } catch (final IOException | BadTokenException | SQLException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
 579                         throw new ServletException(ex);
 580                 }
 581         }
 582
 583         /**
 584          * Some "getter" for total price of position from request or session.
 585          * Single price and amount is multiplyed.
 586          *
 587          * @param product Product instance
 588          * @param request Request instance
 589          * @param session Session instance
 590          * @return Amount as string
 591          */
 592         @Override
 593         public float getTotalPositionPriceFromRequestSession (final Product product, final HttpServletRequest request, final HttpSession session) {
 594                 // Trace message
 595                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 596
 597                 // Is product and session set?
 598                 if (product == null) {
 599                         // Not set
 600                         throw new NullPointerException("product is null"); //NOI18N
 601                 } else if (request == null) {
 602                         // Not set
 603                         throw new NullPointerException("request is null"); //NOI18N
 604                 } else if (session == null) {
 605                         // Not set
 606                         throw new NullPointerException("session is null"); //NOI18N
 607                 }
 608
 609                 // Get choosen
 610                 this.getLogger().debug(MessageFormat.format("Calling handleChooseFromRequestSession({0},{1},{2}) ...", product.getId(), request, session)); //NOI18N
 611                 String choosen = this.handleChooseFromRequestSession(product, request, session);
 612                 this.getLogger().debug(MessageFormat.format("product={0},choosen={1}", product.getId(), choosen)); //NOI18N
 613
 614                 // Must not be null
 615                 assert(choosen instanceof String): "choosen is null"; //NOI18N
 616
 617                 // Is it set?
 618                 if (choosen.isEmpty()) {
 619                         // Is empty
 620                         this.getLogger().debug(MessageFormat.format("product={0},choosen={1} - returning zero ...", product.getId(), choosen)); //NOI18N
 621                         return 0.00f;
 622                 }
 623
 624                 // Get amount
 625                 String amount = this.handleAmountFromRequestSession(product, request, session);
 626                 this.getLogger().debug(MessageFormat.format("product={0},amount={1}", product.getId(), amount)); //NOI18N
 627
 628                 // Must not be null
 629                 assert(amount instanceof String): "amount is null"; //NOI18N
 630
 631                 // Is it empty?
 632                 if (amount.isEmpty() || "0".equals(amount)) { //NOI18N
 633                         // Is empty
 634                         this.getLogger().debug(MessageFormat.format("product={0},amount={1} - returning zero ...", product.getId(), amount)); //NOI18N
 635                         return 0.00f;
 636                 }
 637
 638                 // Init variable
 639                 Integer value = null;
 640
 641                 // Try it
 642                 try {
 643                         // Get amount as integer
 644                         value = Integer.valueOf(amount);
 645                 } catch (final NumberFormatException e) {
 646                         // Bat input
 647                         throw new IllegalArgumentException(e);
 648                 }
 649
 650                 // Calculate price
 651                 float price = (product.getPrice() * value);
 652
 653                 // Trace message
 654                 this.getLogger().trace(MessageFormat.format("product={0},price={1} - EXIT!", product.getId(), price)); //NOI18N
 655
 656                 // Then multiply it with price
 657                 return price;
 658         }
 659
 660         /**
 661          * Handler for amount from request or session
 662          *
 663          * @param product Product instance
 664          * @param request Request instance
 665          * @param session Session instance
 666          * @return Amount as string
 667          */
 668         @Override
 669         public String handleAmountFromRequestSession (final Product product, final HttpServletRequest request, final HttpSession session) {
 670                 // Trace message
 671                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 672
 673                 // Is product and session set?
 674                 if (product == null) {
 675                         // Not set
 676                         throw new NullPointerException("product is null"); //NOI18N
 677                 } else if (request == null) {
 678                         // Not set
 679                         throw new NullPointerException("request is null"); //NOI18N
 680                 } else if (session == null) {
 681                         // Not set
 682                         throw new NullPointerException("session is null"); //NOI18N
 683                 }
 684
 685                 // Init variabke
 686                 Object object;
 687
 688                 // Check request method
 689                 if (!"POST".equals(request.getMethod())) { //NOI18N
 690                         // Not POST, so get from session
 691                         return this.getAmountFromSession(product, session);
 692                 } else if (this.handleChooseFromRequestSession(product, request, session).isEmpty()) {
 693                         // Not choosen
 694                         this.clearSessionAttribute(product, session, HTTP_PARAM_AMOUNT);
 695                         this.getLogger().debug(MessageFormat.format("Unsetting for product={0} in session, returning zero ...", product.getId())); //NOI18N
 696                         return "0"; //NOI18N
 697                 }
 698
 699                 // Get attribute from request
 700                 object = request.getParameter(String.format(HTTP_PARAM_MASK, HTTP_PARAM_AMOUNT, product.getId()));
 701
 702                 // Is it set?
 703                 if (object instanceof String) {
 704                         // Try to parse it to integer
 705                         try {
 706                                 Integer value = Integer.valueOf((String) object);
 707                         } catch (final NumberFormatException ex) {
 708                                 // Not valid input
 709                                 this.getLogger().warn(ex);
 710                                 return "0"; //NOI18N
 711                         }
 712
 713                         // Then set it in session
 714                         this.setValueInSession(product, session, HTTP_PARAM_AMOUNT, object);
 715
 716                         // And return it
 717                         return (String) object;
 718                 }
 719
 720                 // Trace message
 721                 this.getLogger().trace("Calling getAmountFromSession() ..."); //NOI18N
 722
 723                 // Get attribute from session
 724                 return this.getAmountFromSession(product, session);
 725         }
 726
 727         /**
 728          * Checks whether the given product is choosen, request overules session.
 729          *
 730          * @param product Product instance
 731          * @param request Request instance
 732          * @param session Session instance
 733          * @return Whether the product is choosen
 734          */
 735         @Override
 736         public boolean isProductChoosen (final Product product, final HttpServletRequest request, final HttpSession session) {
 737                 // Trace message
 738                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 739
 740                 // Is product and session set?
 741                 if (product == null) {
 742                         // Not set
 743                         throw new NullPointerException("product is null"); //NOI18N
 744                 } else if (request == null) {
 745                         // Not set
 746                         throw new NullPointerException("request is null"); //NOI18N
 747                 } else if (session == null) {
 748                         // Not set
 749                         throw new NullPointerException("session is null"); //NOI18N
 750                 }
 751
 752                 // Get choosen
 753                 this.getLogger().debug(MessageFormat.format("Calling handleChooseFromRequestSession({0},{1},{2}) ...", product.getId(), request, session)); //NOI18N
 754                 String choosen = this.handleChooseFromRequestSession(product, request, session);
 755                 this.getLogger().debug(MessageFormat.format("product={0},choosen={1}", product.getId(), choosen)); //NOI18N
 756
 757                 // Must not be null
 758                 assert(choosen instanceof String): "choosen is null"; //NOI18N
 759
 760                 // Is it not choosen?
 761                 if (choosen.isEmpty()) {
 762                         // Not choosen
 763                         return false;
 764                 }
 765
 766                 // Get amount
 767                 String amount = this.handleAmountFromRequestSession(product, request, session);
 768
 769                 // Must not be null
 770                 assert(amount instanceof String): "amount is not set"; //NOI18N
 771
 772                 // Trace message
 773                 this.getLogger().trace(MessageFormat.format("amount={0} - EXIT!", amount)); //NOI18N
 774
 775                 // Must not be empty and not 0
 776                 return (!amount.isEmpty() && !"0".equals(amount)); //NOI18N
 777         }
 778
 779         /**
 780          * Marks all choosen products as ordered
 781          *
 782          * @param request Request instance
 783          * @param session Session instance
 784          */
 785         @Override
 786         public void markAllChoosenProductsAsOrdered (final HttpServletRequest request, final HttpSession session) throws ServletException {
 787                 // Trace message
 788                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 789
 790                 // Init iterator
 791                 Iterator<Product> iterator = this.getAvailableProducts();
 792
 793                 // "Walk" over all products
 794                 while (iterator.hasNext()) {
 795                         // Get next product
 796                         Product product = iterator.next();
 797
 798                         // Debug message
 799                         this.getLogger().debug(MessageFormat.format("product={0}", product)); //NOI18N
 800
 801                         // Is it choosen?
 802                         if (this.isProductChoosen(product, request, session)) {
 803                                 // Mark product as ordered
 804                                 this.markProductAsOrdered(product, session);
 805                         }
 806                 }
 807
 808                 // Trace message
 809                 this.getLogger().trace("EXIT!"); //NOI18N
 810         }
 811
 812         /**
 813          * Marks given product as choosen in session
 814          *
 815          * @param product Product to mark as ordered
 816          * @param session Session instance
 817          */
 818         @Override
 819         public void markProductAsChoosen (final Product product, final HttpSession session) {
 820                 // Trace message
 821                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 822
 823                 // Is product and session set?
 824                 if (product == null) {
 825                         // Not set
 826                         throw new NullPointerException("product is null"); //NOI18N
 827                 } else if (session == null) {
 828                         // Not set
 829                         throw new NullPointerException("session is null"); //NOI18N
 830                 }
 831
 832                 // Mark it as ordered by setting flag
 833                 this.getLogger().debug(MessageFormat.format("Marking product={0} as choosen.", product.getId())); //NOI18N
 834                 this.setValueInSession(product, session, HTTP_PARAM_CHOOSE, "1"); //NOI18N
 835
 836                 // Trace message
 837                 this.getLogger().trace("EXIT!"); //NOI18N
 838         }
 839
 840         /**
 841          * Marks given product as ordered in session
 842          *
 843          * @param product Product to mark as ordered
 844          * @param session Session instance
 845          */
 846         @Override
 847         public void markProductAsOrdered (final Product product, final HttpSession session) {
 848                 // Trace message
 849                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 850
 851                 // Is product and session set?
 852                 if (product == null) {
 853                         // Not set
 854                         throw new NullPointerException("product is null"); //NOI18N
 855                 } else if (session == null) {
 856                         // Not set
 857                         throw new NullPointerException("session is null"); //NOI18N
 858                 }
 859
 860                 // Mark it as ordered by setting flag
 861                 this.getLogger().debug(MessageFormat.format("Marking product={0} as ordered.", product.getId())); //NOI18N
 862                 this.setValueInSession(product, session, SESSION_ORDERED, "true"); //NOI18N
 863
 864                 // Trace message
 865                 this.getLogger().trace("EXIT!"); //NOI18N
 866         }
 867
 868         /**
 869          * Somewhat setter in session
 870          *
 871          * @param session Session instance
 872          * @param key Session key to set
 873          * @param value Value to set
 874          */
 875         @Override
 876         public void setValueInSession (final HttpSession session, final String key, final Object value) {
 877                 // Trace message
 878                 this.getLogger().trace(MessageFormat.format("session={0},key={1},value={2} - CALLED!", session, key, value)); //NOI18N
 879
 880                 synchronized(session) {
 881                         // Set it synced
 882                         session.setAttribute(key, value);
 883                 }
 884
 885                 // Trace message
 886                 this.getLogger().trace("EXIT!"); //NOI18N
 887         }
 888
 889         /**
 890          * Unmarks given product as choosen in session
 891          *
 892          * @param product Product to unmark as choosen
 893          * @param session Session instance
 894          */
 895         @Override
 896         public void unmarkProductAsChoosen (final Product product, final HttpSession session) {
 897                 // Trace message
 898                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 899
 900                 // Is product and session set?
 901                 if (product == null) {
 902                         // Not set
 903                         throw new NullPointerException("product is null"); //NOI18N
 904                 } else if (session == null) {
 905                         // Not set
 906                         throw new NullPointerException("session is null"); //NOI18N
 907                 }
 908
 909                 // Mark it as ordered by setting flag
 910                 this.getLogger().debug(MessageFormat.format("Unmarking product={0} as choosen.", product.getId())); //NOI18N
 911                 this.clearSessionAttribute(product, session, HTTP_PARAM_CHOOSE);
 912
 913                 // Trace message
 914                 this.getLogger().trace("EXIT!"); //NOI18N
 915         }
 916
 917         /**
 918          * Unmarks given product as ordered in session
 919          *
 920          * @param product Product to unmark as ordered
 921          * @param session Session instance
 922          */
 923         @Override
 924         public void unmarkProductAsOrdered (final Product product, final HttpSession session) {
 925                 // Trace message
 926                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 927
 928                 // Is product and session set?
 929                 if (product == null) {
 930                         // Not set
 931                         throw new NullPointerException("product is null"); //NOI18N
 932                 } else if (session == null) {
 933                         // Not set
 934                         throw new NullPointerException("session is null"); //NOI18N
 935                 }
 936
 937                 // Mark it as ordered by setting flag
 938                 this.getLogger().debug(MessageFormat.format("Unmarking product={0} as ordered.", product.getId())); //NOI18N
 939                 this.clearSessionAttribute(product, session, SESSION_ORDERED);
 940
 941                 // Trace message
 942                 this.getLogger().trace("EXIT!"); //NOI18N
 943         }
 944
 945         /**
 946          * Clears given parameter for product in session
 947          *
 948          * @param product Product instance
 949          * @param session Session instance
 950          * @param parameter Parameter to clear
 951          */
 952         private void clearSessionAttribute (final Product product, final HttpSession session, final String parameter) {
 953                 // Trace message
 954                 this.getLogger().trace(MessageFormat.format("produce={0},parameter={1},session={2} - CALLED!", product, parameter, session)); //NOI18N
 955
 956                 // Clear in session
 957                 this.getLogger().debug(MessageFormat.format("Clearing product={0},parameter={1} ...", product.getId(), parameter)); //NOI18N
 958                 this.setValueInSession(product, session, parameter, null);
 959
 960                 // Trace message
 961                 this.getLogger().trace("EXIT!"); //NOI18N
 962         }
 963
 964         /**
 965          * Some getter for value from session
 966          *
 967          * @param product Product instance
 968          * @param session Session instance
 969          * @param attribute Attribute to get value from
 970          * @return Value from session
 971          */
 972         private Object getValueFromSession (final Product product, final HttpSession session, final String attribute) {
 973                 // Trace message
 974                 this.getLogger().trace(MessageFormat.format("product={0},session={1},attribute={2} - CALLED!", product, session, attribute)); //NOI18N
 975
 976                 // Init variable
 977                 Object value = this.getValueFromSession(session, String.format(HTTP_PARAM_MASK, attribute, product.getId()));
 978
 979                 this.getLogger().debug(MessageFormat.format("product={0},attribute={1},value={2}", product.getId(), attribute, value)); //NOI18N
 980
 981                 // Trace message
 982                 this.getLogger().trace(MessageFormat.format("value={0} - EXIT!", value)); //NOI18N
 983
 984                 // Return it
 985                 return value;
 986         }
 987
 988         /**
 989          * Some getter for value from session
 990          *
 991          * @param session Session instance
 992          * @param key Key to get value from
 993          * @return Value from session
 994          */
 995         private Object getValueFromSession (final HttpSession session, final String key) {
 996                 // Trace message
 997                 this.getLogger().trace(MessageFormat.format("session={0},key={1} - CALLED!", session, key)); //NOI18N
 998
 999                 // Init value
1000                 Object value;
1001
1002                 // Get it synchronized from session
1003                 synchronized (session) {
1004                         value = session.getAttribute(key);
1005                 }
1006
1007                 // Trace message
1008                 this.getLogger().trace(MessageFormat.format("value={0} - EXIT!", value)); //NOI18N
1009
1010                 // Return it
1011                 return value;
1012         }
1013
1014         /**
1015          * Handler for choosen (checkbox) from request or session
1016          *
1017          * @param product Product instance
1018          * @param request Request instance
1019          * @param session Session instance
1020          * @return Amount as string
1021          */
1022         private String handleChooseFromRequestSession(final Product product, final HttpServletRequest request, final HttpSession session) {
1023                 // Trace message
1024                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
1025
1026                 // Is product and session set?
1027                 if (product == null) {
1028                         // Not set
1029                         throw new NullPointerException("product is null"); //NOI18N
1030                 } else if (request == null) {
1031                         // Not set
1032                         throw new NullPointerException("request is null"); //NOI18N
1033                 } else if (session == null) {
1034                         // Not set
1035                         throw new NullPointerException("session is null"); //NOI18N
1036                 }
1037
1038                 // Init variabke
1039                 Object object;
1040
1041                 // Check request method
1042                 if (!"POST".equals(request.getMethod())) { //NOI18N
1043                         // Not POST, so get from session
1044                         this.getLogger().trace(MessageFormat.format("Calling this.getChooseFromSession({0},{1}) ... - EXIT!", product.getId(), session)); //NOI18N
1045                         return this.getChooseFromSession(product, session);
1046                 } else if (this.isProductOrdered(product, session)) {
1047                         // Product is ordered
1048                         this.getLogger().trace(MessageFormat.format("Calling this.getChooseFromSession({0},{1}) ... - EXIT!", product.getId(), session)); //NOI18N
1049                         return this.getChooseFromSession(product, session);
1050                 } else if (!this.getChooseFromSession(product, session).isEmpty()) {
1051                         // Found in session
1052                         this.getLogger().trace(MessageFormat.format("Calling this.getChooseFromSession({0},{1}) ... - EXIT!", product.getId(), session)); //NOI18N
1053                         return this.getChooseFromSession(product, session);
1054                 }
1055
1056                 // Get reqzest element
1057                 object = request.getParameter(String.format(HTTP_PARAM_MASK, HTTP_PARAM_CHOOSE, product.getId()));
1058                 this.getLogger().debug(MessageFormat.format("product={0},object={1}", product.getId(), object)); //NOI18N
1059
1060                 // Is it null?
1061                 if (object == null) {
1062                         // Unset session
1063                         this.getLogger().debug(MessageFormat.format("Unsetting session for product={0} ...", product.getId())); //NOI18N
1064                         this.clearSessionAttribute(product, session, HTTP_PARAM_CHOOSE);
1065                         this.clearSessionAttribute(product, session, HTTP_PARAM_AMOUNT);
1066
1067                         // Return empty string
1068                         return ""; //NOI18N
1069                 }
1070
1071                 // Then set it in session
1072                 this.setValueInSession(product, session, HTTP_PARAM_CHOOSE, object);
1073
1074                 // Cast to string and return it
1075                 this.getLogger().debug(MessageFormat.format("product={0} - Returning {1} ...", product.getId(), object)); //NOI18N
1076                 return (String) object;
1077         }
1078
1079         /**
1080          * Initializes database frontends.
1081          */
1082         private void initDatabaseFrontends () throws UnsupportedDatabaseBackendException, SQLException {
1083                 // Product frontend
1084                 this.productFrontend = new PizzaProductDatabaseFrontend();
1085
1086                 // Category frontend
1087                 this.categoryFrontend = new PizzaCategoryDatabaseFrontend();
1088         }
1089
1090         /**
1091          * Checks whether given category title is already used
1092          *
1093          * @param title Title of category to check
1094          * @return Whether it has been found
1095          */
1096         private boolean isCategoryTitleUsed (final String title) throws IOException, SQLException, BadTokenException, CorruptedDatabaseFileException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
1097                 // Delegate to frontend
1098                 return this.categoryFrontend.isCategoryTitleUsed(title);
1099         }
1100
1101         /**
1102          * Checks if given product title is already used
1103          * @param title Product title to check
1104          * @return Whether the product title has already been used
1105          */
1106         private boolean isProductTitleUsed (final String title) throws IOException, SQLException, BadTokenException, CorruptedDatabaseFileException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
1107                 // Delegate to frontend
1108                 return this.productFrontend.isProductTitleUsed(title);
1109         }
1110
1111         /**
1112          * Checks if the product ordered?
1113          *
1114          * @param product Product instance
1115          * @param session HttpSession instance
1116          * @return
1117          */
1118         private boolean isProductOrdered(final Product product, final HttpSession session) {
1119                 // Trace message
1120                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
1121
1122                 // Get session
1123                 Object isOrdered = this.getValueFromSession(product, session, SESSION_ORDERED);
1124                 this.getLogger().debug(MessageFormat.format("product={0},isOrdered={1}", product.getId(), isOrdered)); //NOI18N
1125
1126                 // Return result
1127                 return ("true".equals(isOrdered)); //NOI18N
1128         }
1129
1130         /**
1131          * Somewhat setter in session
1132          *
1133          * @param product Product instance
1134          * @param session Session instance
1135          * @param keyPart Key part to include in final key
1136          * @param value Value to set
1137          */
1138         private void setValueInSession (final Product product, final HttpSession session, final String keyPart, final Object value) {
1139                 // Trace message
1140                 this.getLogger().trace(MessageFormat.format("product={0},session={1},keyPart={2},value={3} - CALLED!", product, session, keyPart, value)); //NOI18N
1141
1142                 // Set it synced
1143                 this.getLogger().debug(MessageFormat.format("Setting value={0} for product={1},keyPart={2}", value, product.getId(), keyPart)); //NOI18N
1144                 this.setValueInSession(session, String.format(HTTP_PARAM_MASK, keyPart, product.getId()), value);
1145
1146                 // Trace message
1147                 this.getLogger().trace("EXIT!"); //NOI18N
1148         }
1149
1150         /**
1151          * Application starter
1152          */
1153         private void start () {
1154                 // Init bundle
1155                 this.initBundle();
1156
1157                 try {
1158                         // Init properties
1159                         this.initProperties();
1160                 } catch (final IOException ex) {
1161                         // Abort here
1162                         this.abortProgramWithException(ex);
1163                 }
1164
1165                 // Init instance
1166                 Iterator<Product> iterator = null;
1167
1168                 try {
1169                         // Get iterator
1170                         iterator = this.getAvailableProducts();
1171                 } catch (final ServletException ex) {
1172                         this.abortProgramWithException(ex);
1173                 }
1174
1175                 // "Walk" over all products
1176                 while ((iterator instanceof Iterator) && (iterator.hasNext())) {
1177                         // Get next product
1178                         Product product = iterator.next();
1179
1180                         // Output data
1181                         this.getLogger().debug(MessageFormat.format("Product {0}, {1}: {2}", product.getId(), product.getTitle(), product.getPrice())); //NOI18N
1182                 }
1183
1184                 // Generate fake Customer instance
1185                 Customer customer = new PizzaServiceCustomer();
1186
1187                 /*
1188                  * Need a least a gender ... :( See, that is why I don't like default
1189                  * constructors, you can easily miss something important and bam! You
1190                  * get an NPE. The fix here is, to have construtors (or factories) which
1191                  * requires all required instances that needs to be set to get a
1192                  * consitent object back.
1193                  */
1194
1195                 // Gender is MALE now
1196                 customer.setGender(Gender.MALE);
1197
1198                 // Init iterator
1199                 Iterator<Map.Entry<Field, Object>> it = null;
1200
1201                 try {
1202                         // Get iterator on all its fields
1203                         it = customer.iterator();
1204                 } catch (final NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
1205                         this.abortProgramWithException(ex);
1206                 }
1207
1208                 // Output it
1209                 while ((it instanceof Iterator) && (it.hasNext())) {
1210                         Map.Entry<Field, Object> entry = it.next();
1211                         this.getLogger().debug(MessageFormat.format("entry {0}={1}", entry.getKey(), entry.getValue())); //NOI18N
1212                 }
1213         }
1214
1215         /**
1216          * Adds given category data from request to database
1217          *
1218          * @param request Request instance
1219          */
1220         @Override
1221         public void doAdminAddCategory (final HttpServletRequest request) throws ServletException, CategoryTitleAlreadyUsedException {
1222                 // Trace message
1223                 this.getLogger().trace(MessageFormat.format("request={0} - CALLED!", request)); //NOI18N
1224
1225                 // request must not be null
1226                 if (request == null) {
1227                         // Is null
1228                         throw new NullPointerException("request is null"); //NOI18N
1229                 }
1230
1231                 // Get all fields
1232                 String title = request.getParameter(PizzaCategoryDatabaseConstants.COLUMN_TITLE);
1233                 String parent = request.getParameter(PizzaCategoryDatabaseConstants.COLUMN_PARENT);
1234
1235                 // Debug message
1236                 this.getLogger().debug(MessageFormat.format("title={0},parent={1}", title, parent)); //NOI18N
1237
1238                 // Init variables for casting
1239                 Integer id = 0;
1240
1241                 // Check all fields
1242                 if (title == null) {
1243                         // "title" not set
1244                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaCategoryDatabaseConstants.COLUMN_TITLE)); //NOI18N
1245                 } else if (title.isEmpty()) {
1246                         // Is left empty
1247                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaCategoryDatabaseConstants.COLUMN_TITLE)); //NOI18N
1248                 } else if ((parent != null) && (!parent.isEmpty())) {
1249                         // "parent" is set, so check it
1250                         try {
1251                                 id = Integer.parseInt(parent);
1252                         } catch (final NumberFormatException e) {
1253                                 // Not valid number
1254                                 throw new IllegalArgumentException(e);
1255                         }
1256                 }
1257
1258                 try {
1259                         // Try to check if title is used already
1260                         if (this.isCategoryTitleUsed(title)) {
1261                                 // Title already used
1262                                 throw new CategoryTitleAlreadyUsedException(request);
1263                         }
1264                 } catch (final IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
1265                         throw new ServletException(ex);
1266                 }
1267
1268                 try {
1269                         // The category is not found, so add it to database
1270                         this.categoryFrontend.addCategory(title, id);
1271                 } catch (final SQLException | IOException ex) {
1272                         // Continue to throw it
1273                         throw new ServletException(ex);
1274                 }
1275
1276                 // Trace message
1277                 this.getLogger().trace("EXIT!"); //NOI18N
1278         }
1279
1280         /**
1281          * Adds given product data from request to database
1282          *
1283          * @param request Request instance
1284          */
1285         @Override
1286         public void doAdminAddProduct (final HttpServletRequest request) throws ServletException, ProductTitleAlreadyUsedException {
1287                 // Trace message
1288                 this.getLogger().trace(MessageFormat.format("request={0} - CALLED!", request)); //NOI18N
1289
1290                 // request must not be null
1291                 if (request == null) {
1292                         // Is null
1293                         throw new NullPointerException("request is null"); //NOI18N
1294                 }
1295
1296                 // Get title, price and category id
1297                 String title = request.getParameter(PizzaProductDatabaseConstants.COLUMN_TITLE);
1298                 String price = request.getParameter(PizzaProductDatabaseConstants.COLUMN_PRICE);
1299                 String category = request.getParameter(PizzaProductDatabaseConstants.COLUMN_CATEGORY);
1300                 String available = request.getParameter(PizzaProductDatabaseConstants.COLUMN_AVAILABLE);
1301
1302                 // Debug message
1303                 this.getLogger().debug(MessageFormat.format("title={0},price={1},category={2},available={3}", title, price, category, available));
1304
1305                 // Variables for converting
1306                 Long id = null;
1307                 Float p = null;
1308
1309                 // Check all fields
1310                 if (title == null) {
1311                         // "title" not set
1312                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_TITLE)); //NOI18N
1313                 } else if (title.isEmpty()) {
1314                         // Is left empty
1315                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_TITLE)); //NOI18N
1316                 } else if (price == null) {
1317                         // "price" not set
1318                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_PRICE)); //NOI18N
1319                 } else if (price.isEmpty()) {
1320                         // Is left empty
1321                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_PRICE)); //NOI18N
1322                 } else if (category == null) {
1323                         // "title" not set
1324                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_CATEGORY)); //NOI18N
1325                 } else if (category.isEmpty()) {
1326                         // Is left empty
1327                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_CATEGORY)); //NOI18N
1328                 } else if (available == null) {
1329                         // "title" not set
1330                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_AVAILABLE)); //NOI18N
1331                 } else if (available.isEmpty()) {
1332                         // Is left empty
1333                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_AVAILABLE)); //NOI18N
1334                 } else if ((!"true".equals(available)) && (!"false".equals(available))) { //NOI18N
1335                         // Invalid value
1336                         throw new IllegalArgumentException(MessageFormat.format("{0} is invalid: {1}", PizzaProductDatabaseConstants.COLUMN_AVAILABLE, available)); //NOI18N
1337                 }
1338
1339                 // Parse numbers
1340                 try {
1341                         id = Long.parseLong(category);
1342                         p = Float.parseFloat(price);
1343                 } catch (final NumberFormatException e) {
1344                         // Not valid number
1345                         throw new IllegalArgumentException(e);
1346                 }
1347
1348                 // Parse boolean
1349                 Boolean a = Boolean.parseBoolean(available);
1350
1351                 // Test on product title
1352                 try {
1353                         // Try to check if title is used already
1354                         if (this.isProductTitleUsed(title)) {
1355                                 // Title already used
1356                                 throw new ProductTitleAlreadyUsedException(request);
1357                         }
1358                 } catch (final IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
1359                         throw new ServletException(ex);
1360                 }
1361
1362                 try {
1363                         // The product is not found, so add it to database
1364                         this.productFrontend.addProduct(title, p, id, a);
1365                 } catch (final SQLException | IOException ex) {
1366                         // Continue to throw it
1367                         throw new ServletException(ex);
1368                 }
1369
1370                 // Trace message
1371                 this.getLogger().trace("EXIT!"); //NOI18N
1372         }
1373
1374         /**
1375          * Generates link HTML code for given category's parent id, if set. This
1376          * link then points to products.jsp?category_id=x
1377          *
1378          * @param category Category instance
1379          * @return HTML code
1380          */
1381         @Override
1382         public String generateLinkForParent (final Category category) {
1383                 // Trace message
1384                 this.getLogger().trace(MessageFormat.format("category={0} - CALLED!", category)); //NOI18N
1385
1386                 // category must not be null
1387                 if (category == null) {
1388                         // Is null
1389                         throw new NullPointerException("category is null"); //NOI18N
1390                 }
1391
1392                 // Get parent id
1393                 Integer parent = category.getParent();
1394
1395                 // Is the id set?
1396                 if (parent > 0) {
1397                         // Product HTML code for link
1398                         throw new UnsupportedOperationException(MessageFormat.format("parent={0} - Unfinished!", parent)); //NOI18N
1399                 }
1400
1401                 // No parent set
1402                 return "Keine";
1403         }
1404 }