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 java.io.IOException;
  20 import java.io.UnsupportedEncodingException;
  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.HttpServletResponse;
  31 import javax.servlet.http.HttpSession;
  32 import org.mxchange.jcore.contact.Gender;
  33 import org.mxchange.jcore.exceptions.BadTokenException;
  34 import org.mxchange.jcore.exceptions.CorruptedDatabaseFileException;
  35 import org.mxchange.jcore.exceptions.UnsupportedDatabaseBackendException;
  36 import org.mxchange.pizzaapplication.BasePizzaServiceSystem;
  37 import org.mxchange.pizzaapplication.category.Category;
  38 import org.mxchange.pizzaapplication.customer.Customer;
  39 import org.mxchange.pizzaapplication.customer.PizzaServiceCustomer;
  40 import org.mxchange.pizzaapplication.database.category.PizzaCategoryDatabaseConstants;
  41 import org.mxchange.pizzaapplication.database.frontend.category.CategoryFrontend;
  42 import org.mxchange.pizzaapplication.database.frontend.category.PizzaCategoryDatabaseFrontend;
  43 import org.mxchange.pizzaapplication.database.frontend.product.PizzaProductDatabaseFrontend;
  44 import org.mxchange.pizzaapplication.database.frontend.product.ProductFrontend;
  45 import org.mxchange.pizzaapplication.database.product.PizzaProductDatabaseConstants;
  46 import org.mxchange.pizzaapplication.exceptions.CategoryTitleAlreadyUsedException;
  47 import org.mxchange.pizzaapplication.exceptions.ProductTitleAlreadyUsedException;
  48 import org.mxchange.pizzaapplication.product.Product;
  49
  50 /**
  51  * Main application class
  52  *
  53  * @author Roland Haeder
  54  */
  55 public class PizzaServiceApplication extends BasePizzaServiceSystem implements PizzaApplication {
  56         /**
  57          * Main title
  58          */
  59         public static final String MAIN_TITLE = "Pizza-Service";
  60
  61         /**
  62          * Frontend for products
  63          */
  64         private ProductFrontend productFrontend;
  65
  66         /**
  67          * Frontend for categories
  68          */
  69         private CategoryFrontend categoryFrontend;
  70
  71         /**
  72          * Some singleton getter for this instance. If the instance is not set in
  73          * given application, it will be created.
  74          *
  75          * @param context Servlet context
  76          * @return This instance
  77          * @throws javax.servlet.ServletException If object is not set correctly
  78          */
  79         public static final PizzaApplication getInstance (final ServletContext context) throws ServletException {
  80                 // Check application instance
  81                 if (context == null) {
  82                         // Not set
  83                         throw new NullPointerException("application is null"); //NOI18N
  84                 }
  85
  86                 // Init instance
  87                 PizzaApplication instance = null;
  88
  89                 // Get instance from servlet application (aka. "application scope")
  90                 Object object = context.getAttribute("app"); //NOI18N
  91
  92                 // Is it set?
  93                 if (object instanceof PizzaApplication) {
  94                         // Instance is set, so casting should work
  95                         instance = (PizzaApplication) object;
  96
  97                         // Debug message
  98                         instance.getLogger().debug(MessageFormat.format("Using existing instance {0} ...", object));
  99                 } else if (object instanceof Object) {
 100                         // Not correct instance
 101                         throw new ServletException("app is not set correctly"); //NOI18N
 102                 } else {
 103                         try {
 104                                 // "service" is null, so initialize it
 105                                 instance = new PizzaServiceApplication(context);
 106
 107                         // Debug message
 108                         instance.getLogger().debug(MessageFormat.format("Created new instance {0} ...", object));
 109                         } catch (final UnsupportedDatabaseBackendException | SQLException | IOException | BadTokenException ex) {
 110                                 throw new ServletException(ex);
 111                         }
 112
 113                         // And set it here
 114                         context.setAttribute("app", instance); //NOI18N
 115                 }
 116
 117                 // Trace message
 118                 instance.getLogger().trace(MessageFormat.format("instance={0} - EXIT!", instance)); //NOI18N
 119
 120                 // Return it
 121                 return instance;
 122         }
 123
 124         /**
 125          * For debugging purpose
 126          *
 127          * @param args Arguments
 128          */
 129         public static void main (String[] args) {
 130                 // Get instance and start it
 131                 new PizzaServiceApplication().start();
 132         }
 133
 134         /**
 135          * Constructor with servet configuration
 136          *
 137          * @param context Servlet context
 138          */
 139         private PizzaServiceApplication (final ServletContext context) throws UnsupportedDatabaseBackendException, SQLException, IOException, BadTokenException {
 140                 // Temporary initialize default bundle
 141                 // @TODO The JSF may have better internatialization support
 142                 this.initBundle();
 143
 144                 // Initialize properties from config
 145                 this.initProperties(context);
 146
 147                 // Init database frontends
 148                 this.initDatabaseFrontends();
 149         }
 150
 151         /**
 152          * Default constructor
 153          */
 154         private PizzaServiceApplication () {
 155         }
 156
 157         /**
 158          * Calculates total amount of all choosen products
 159          *
 160          * @param request Request instance
 161          * @param session Session instance
 162          * @return Total amount of all choosen products
 163          */
 164         @Override
 165         public int calculateTotalAmount (final HttpServletRequest request, final HttpSession session) throws ServletException {
 166                 // Trace message
 167                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 168
 169                 // Is product and session set?
 170                 if (request == null) {
 171                         // Not set
 172                         throw new NullPointerException("request is null"); //NOI18N
 173                 } else if (session == null) {
 174                         // Not set
 175                         throw new NullPointerException("session is null"); //NOI18N
 176                 }
 177
 178                 // Init/declare total price and iterator
 179                 int totalAmount = 0;
 180                 Iterator<Product> iterator = this.getAvailableProducts();
 181
 182                 // "Walk" over all products
 183                 while (iterator.hasNext()) {
 184                         // Get next product
 185                         Product product = iterator.next();
 186
 187                         // Is this choosen?
 188                         if (this.isProductChoosen(product, request, session)) {
 189                                 // Then add ordered amount
 190                                 this.getLogger().debug(MessageFormat.format("Counting {0} ...", product.getId())); //NOI18N
 191
 192                                 // Getting amount
 193                                 String amount = this.getAmountFromSession(product, session);
 194
 195                                 // Add it up
 196                                 this.getLogger().debug(MessageFormat.format("amount={0}", amount)); //NOI18N
 197                                 totalAmount += Integer.valueOf(amount);
 198                         }
 199                         this.getLogger().debug(MessageFormat.format("product={0},totalAmount={1}", product.getId(), totalAmount)); //NOI18N
 200                 }
 201
 202                 // Trace message
 203                 this.getLogger().trace(MessageFormat.format("totalAmount={0} - EXIT!", totalAmount)); //NOI18N
 204
 205                 // Return total price
 206                 return totalAmount;
 207         }
 208
 209         /**
 210          * Calculates total price of all choosen products
 211          *
 212          * @param request Request instance
 213          * @param session Session instance
 214          * @return Total price of all choosen products
 215          */
 216         @Override
 217         public float calculateTotalPrice (final HttpServletRequest request, final HttpSession session) throws ServletException {
 218                 // Trace message
 219                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 220
 221                 // Is product and session set?
 222                 if (request == null) {
 223                         // Not set
 224                         throw new NullPointerException("request is null"); //NOI18N
 225                 } else if (session == null) {
 226                         // Not set
 227                         throw new NullPointerException("session is null"); //NOI18N
 228                 }
 229
 230                 // Init total price
 231                 float totalPrice = 0.00f;
 232
 233                 // Get iterator
 234                 Iterator<Product> iterator = this.getAvailableProducts();
 235
 236                 // "Walk" over all products
 237                 while (iterator.hasNext()) {
 238                         // Get next product
 239                         Product product = iterator.next();
 240
 241                         // Is this choosen?
 242                         if (this.isProductChoosen(product, request, session)) {
 243                                 // Then add product's total price
 244                                 this.getLogger().debug(MessageFormat.format("Calling getTotalPositionPriceFromRequestSession({0},request,session) ...", product.getId())); //NOI18N
 245                                 totalPrice += this.getTotalPositionPriceFromRequestSession(product, request, session);
 246                         }
 247                         this.getLogger().debug(MessageFormat.format("product={0},totalPrice={1}", product.getId(), totalPrice)); //NOI18N
 248                 }
 249
 250                 // Trace message
 251                 this.getLogger().trace(MessageFormat.format(" totalPrice={0} - EXIT!", totalPrice)); //NOI18N
 252
 253                 // Return total price
 254                 return totalPrice;
 255         }
 256
 257         @Override
 258         public void doBootstrap () {
 259                 throw new UnsupportedOperationException("Not supported yet."); //NOI18N
 260         }
 261
 262         @Override
 263         public void doMainLoop () {
 264                 throw new UnsupportedOperationException("Not supported yet."); //NOI18N
 265         }
 266
 267         @Override
 268         public void doShutdown () {
 269                 throw new UnsupportedOperationException("Not supported yet."); //NOI18N
 270         }
 271
 272         /**
 273          * Some "getter" for amount from session
 274          *
 275          * @param product Product instance
 276          * @param session Session instance
 277          * @return Amount as string
 278          */
 279         @Override
 280         public String getAmountFromSession (final Product product, final HttpSession session) {
 281                 // Trace message
 282                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 283
 284                 // Is product and session set?
 285                 if (product == null) {
 286                         // Not set
 287                         throw new NullPointerException("product is null"); //NOI18N
 288                 } else if (session == null) {
 289                         // Not set
 290                         throw new NullPointerException("session is null"); //NOI18N
 291                 }
 292
 293                 // Get attribute
 294                 Object object = this.getValueFromSession(product, session, HTTP_PARAM_AMOUNT);
 295
 296                 // Is the object null?
 297                 if (object == null) {
 298                         // Trace message
 299                         this.getLogger().trace("Returning 0 - EXIT!"); //NOI18N
 300
 301                         // Not found
 302                         return "0"; //NOI18N
 303                 }
 304
 305                 // Trace message
 306                 this.getLogger().trace(MessageFormat.format("object={0} - EXIT!", object)); //NOI18N
 307
 308                 // Cast to string and return it
 309                 return (String) object;
 310         }
 311
 312         /**
 313          * Some "getter" for HTML code 'checked="checked"' if the product is choosen
 314          *
 315          * @param product Product instance
 316          * @param request Request instance
 317          * @param session Session instance
 318          * @return Whether the product is choosen
 319          */
 320         @Override
 321         public String getCheckedHtmlFromProduct (final Product product, final HttpServletRequest request, final HttpSession session) {
 322                 // Trace message
 323                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 324
 325                 // Is product and session set?
 326                 if (product == null) {
 327                         // Not set
 328                         throw new NullPointerException("product is null"); //NOI18N
 329                 } else if (request == null) {
 330                         // Not set
 331                         throw new NullPointerException("request is null"); //NOI18N
 332                 } else if (session == null) {
 333                         // Not set
 334                         throw new NullPointerException("session is null"); //NOI18N
 335                 }
 336
 337                 // First let's check if the product is choosen
 338                 if (this.isProductChoosen(product, request, session)) {
 339                         // Trace message
 340                         this.getLogger().trace("Returning checked=\"checked\" - EXIT!"); //NOI18N
 341
 342                         // Is choosen
 343                         return "checked=\"checked\""; //NOI18N
 344                 } else {
 345                         // Trace message
 346                         this.getLogger().trace("Returning empty string - EXIT!"); //NOI18N
 347
 348                         // Not choosen
 349                         return ""; //NOI18N
 350                 }
 351         }
 352
 353         /**
 354          * Some "getter" for choose from session
 355          *
 356          * @param product Product instance
 357          * @param session Session instance
 358          * @return Choose as string
 359          */
 360         @Override
 361         public String getChooseFromSession (final Product product, final HttpSession session) {
 362                 // Trace message
 363                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 364
 365                 // Is product and session set?
 366                 if (product == null) {
 367                         // Not set
 368                         throw new NullPointerException("product is null"); //NOI18N
 369                 } else if (session == null) {
 370                         // Not set
 371                         throw new NullPointerException("session is null"); //NOI18N
 372                 }
 373
 374                 // Get attribute
 375                 Object object = this.getValueFromSession(product, session, HTTP_PARAM_ITEM_ID);
 376
 377                 // Is the object null?
 378                 if (object == null) {
 379                         // Not found
 380                         this.getLogger().debug(MessageFormat.format("Returning empty string for product={0} ...", product.getId())); //NOI18N
 381                         return ""; //NOI18N
 382                 }
 383
 384                 // Trace message
 385                 this.getLogger().trace(MessageFormat.format("object={0} - CALLED!", object)); //NOI18N
 386
 387                 // Cast to string and return it
 388                 return (String) object;
 389         }
 390
 391         /**
 392          * Some "getter" for HTML code 'disabled="disabled"' for e.g. submit buttons
 393          *
 394          * @param request Request instance
 395          * @param session Session instance
 396          * @return Whether the product is choosen
 397          */
 398         @Override
 399         public String getDisabledHtmlFromSession (final HttpServletRequest request, final HttpSession session) throws ServletException {
 400                 // Trace message
 401                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 402
 403                 // Is product and session set?
 404                 if (request == null) {
 405                         // Not set
 406                         throw new NullPointerException("request is null"); //NOI18N
 407                 } else if (session == null) {
 408                         // Not set
 409                         throw new NullPointerException("session is null"); //NOI18N
 410                 }
 411
 412                 // Get "enabled" from request scope
 413                 Boolean enabled = Boolean.parseBoolean((String) request.getAttribute("enabled")); //NOI18N
 414
 415                 // Debug message
 416                 this.getLogger().debug(MessageFormat.format("enabled={0}", enabled)); //NOI18N
 417
 418                 // Is something selected?
 419                 if ((enabled) || (this.calculateTotalAmount(request, session) > 0)) {
 420                         // Trace message
 421                         this.getLogger().trace("Returning empty string - EXIT!"); //NOI18N
 422
 423                         // Something has been choosen
 424                         return ""; //NOI18N
 425                 } else {
 426                         // Trace message
 427                         this.getLogger().trace("Returning disabled=\"disabled\" - EXIT!"); //NOI18N
 428
 429                         // Nothing choosen yet
 430                         return "disabled=\"disabled\""; //NOI18N
 431                 }
 432         }
 433
 434         /**
 435          * Some "getter" for choosen (checkbox) from session
 436          *
 437          * @param product Product instance
 438          * @param request Request instance
 439          * @param session Session instance
 440          * @return Amount as string
 441          */
 442         @Override
 443         public String getPrintableChoosenFromRequestSession (final Product product, final HttpServletRequest request, final HttpSession session) {
 444                 // Trace message
 445                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 446
 447                 // Is product and session set?
 448                 if (product == null) {
 449                         // Not set
 450                         throw new NullPointerException("product is null"); //NOI18N
 451                 } else if (request == null) {
 452                         // Not set
 453                         throw new NullPointerException("request is null"); //NOI18N
 454                 } else if (session == null) {
 455                         // Not set
 456                         throw new NullPointerException("session is null"); //NOI18N
 457                 }
 458
 459                 // Get element
 460                 this.getLogger().debug(MessageFormat.format("Calling handleChooseFromRequestSession({0},{1},{2}) ...", product.getId(), request, session)); //NOI18N
 461                 String choosen = this.handleChooseFromRequestSession(product, request, session);
 462                 this.getLogger().debug(MessageFormat.format("product={0},choosen={1}", product.getId(), choosen)); //NOI18N
 463
 464                 // Must not be null
 465                 assert(choosen instanceof String): "choosen is null"; //NOI18N
 466
 467                 // Is it empty?
 468                 if (choosen.isEmpty()) {
 469                         // Not choosen
 470                         return "Nein";
 471                 }
 472
 473                 // Get amount
 474                 String amount = this.handleAmountFromRequestSession(product, request, session);
 475                 this.getLogger().debug(MessageFormat.format("product={0},amount={1}", product.getId(), amount)); //NOI18N
 476
 477                 // Must not be null
 478                 assert(amount instanceof String): "amount is null"; //NOI18N
 479
 480                 // Is it empty?
 481                 if (amount.isEmpty() || "0".equals(amount)) { //NOI18N
 482                         // Choosen, but no amount
 483                         return "Nein";
 484                 } else {
 485                         // Is choosen
 486                         return "Ja";
 487                 }
 488         }
 489
 490         /**
 491          * Checks if given Product instance is available and returns a printable
 492          * (human-readable) string.
 493          *
 494          * @param product Product instance to check
 495          * @return Human-readable version of product availability
 496          */
 497         @Override
 498         public String getPrintableProduktAvailability (final Product product) {
 499                 // Trace message
 500                 this.getLogger().trace(MessageFormat.format("product={0} - CALLED!", product)); //NOI18N
 501
 502                 // Is it null?
 503                 if (product == null) {
 504                         // Should not be null
 505                         throw new NullPointerException("product is null"); //NOI18N
 506                 }
 507
 508                 // Get availability
 509                 if (product.getAvailable() == true) {
 510                         // Is available
 511                         return "Ja";
 512                 } else {
 513                         // Not, not for public
 514                         return "Nein";
 515                 }
 516         }
 517
 518         /**
 519          * Some getter for printable value from session or an empty string for null.
 520          *
 521          * @param session Session instance
 522          * @param key Key to get
 523          * @return Value from key, empty string for null
 524          */
 525         @Override
 526         public Object getPrintableValeFromSession (final HttpSession session, final String key) {
 527                 // Trace message
 528                 this.getLogger().trace(MessageFormat.format("session={0},key={1} - CALLED", session, key)); //NOI18N
 529
 530                 // Are both parameter not null?
 531                 if (session == null) {
 532                         // Abort here
 533                         throw new NullPointerException("session is null"); //NOI18N
 534                 } else  if (key == null) {
 535                         // Abort here
 536                         throw new NullPointerException("key is null"); //NOI18N
 537                 }
 538
 539                 // Now get it
 540                 Object value = this.getValueFromSession(session, key);
 541
 542                 // Debug message
 543                 this.getLogger().debug(MessageFormat.format("value={0}", value)); //NOI18N
 544
 545                 // Trace message
 546                 this.getLogger().trace(MessageFormat.format("Calling this.convertNullToEmpty({0}) ... - EXIT!", value)); //NOI18N
 547
 548                 // Return actual value
 549                 return this.convertNullToEmpty(value);
 550         }
 551
 552         /**
 553          * Some "getter" for a an array of only available products
 554          *
 555          * @return All products
 556          */
 557         @Override
 558         public Iterator<Product> getAvailableProducts () throws ServletException {
 559                 try {
 560                         // Ask frontend for a list of products
 561                         return this.productFrontend.getAvailableProducts();
 562                 } catch (final IOException | BadTokenException | SQLException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
 563                         throw new ServletException(ex);
 564                 }
 565         }
 566
 567         /**
 568          * Some "getter" for a an array of all products
 569          *
 570          * @return All products
 571          */
 572         @Override
 573         public Iterator<Product> getAllProducts () throws ServletException {
 574                 try {
 575                         // Ask frontend for a list of products
 576                         return this.productFrontend.getAllProducts();
 577                 } catch (final IOException | BadTokenException | SQLException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
 578                         throw new ServletException(ex);
 579                 }
 580         }
 581
 582         /**
 583          * Some "getter" for a an array of all categories
 584          *
 585          * @return All categories
 586          */
 587         @Override
 588         public Iterator<Category> getCategories () throws ServletException {
 589                 try {
 590                         // Ask frontend for a list of categories
 591                         return this.categoryFrontend.getCategories();
 592                 } catch (final IOException | BadTokenException | SQLException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
 593                         throw new ServletException(ex);
 594                 }
 595         }
 596
 597         /**
 598          * Some "getter" for total price of position from request or session.
 599          * Single price and amount is multiplyed.
 600          *
 601          * @param product Product instance
 602          * @param request Request instance
 603          * @param session Session instance
 604          * @return Amount as string
 605          */
 606         @Override
 607         public float getTotalPositionPriceFromRequestSession (final Product product, final HttpServletRequest request, final HttpSession session) {
 608                 // Trace message
 609                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 610
 611                 // Is product and session set?
 612                 if (product == null) {
 613                         // Not set
 614                         throw new NullPointerException("product is null"); //NOI18N
 615                 } else if (request == null) {
 616                         // Not set
 617                         throw new NullPointerException("request is null"); //NOI18N
 618                 } else if (session == null) {
 619                         // Not set
 620                         throw new NullPointerException("session is null"); //NOI18N
 621                 }
 622
 623                 // Get choosen
 624                 this.getLogger().debug(MessageFormat.format("Calling handleChooseFromRequestSession({0},{1},{2}) ...", product.getId(), request, session)); //NOI18N
 625                 String choosen = this.handleChooseFromRequestSession(product, request, session);
 626                 this.getLogger().debug(MessageFormat.format("product={0},choosen={1}", product.getId(), choosen)); //NOI18N
 627
 628                 // Must not be null
 629                 assert(choosen instanceof String): "choosen is null"; //NOI18N
 630
 631                 // Is it set?
 632                 if (choosen.isEmpty()) {
 633                         // Is empty
 634                         this.getLogger().debug(MessageFormat.format("product={0},choosen={1} - returning zero ...", product.getId(), choosen)); //NOI18N
 635                         return 0.00f;
 636                 }
 637
 638                 // Get amount
 639                 String amount = this.handleAmountFromRequestSession(product, request, session);
 640                 this.getLogger().debug(MessageFormat.format("product={0},amount={1}", product.getId(), amount)); //NOI18N
 641
 642                 // Must not be null
 643                 assert(amount instanceof String): "amount is null"; //NOI18N
 644
 645                 // Is it empty?
 646                 if (amount.isEmpty() || "0".equals(amount)) { //NOI18N
 647                         // Is empty
 648                         this.getLogger().debug(MessageFormat.format("product={0},amount={1} - returning zero ...", product.getId(), amount)); //NOI18N
 649                         return 0.00f;
 650                 }
 651
 652                 // Init variable
 653                 Integer value = null;
 654
 655                 // Try it
 656                 try {
 657                         // Get amount as integer
 658                         value = Integer.valueOf(amount);
 659                 } catch (final NumberFormatException e) {
 660                         // Bat input
 661                         throw new IllegalArgumentException(e);
 662                 }
 663
 664                 // Calculate price
 665                 float price = (product.getPrice() * value);
 666
 667                 // Trace message
 668                 this.getLogger().trace(MessageFormat.format("product={0},price={1} - EXIT!", product.getId(), price)); //NOI18N
 669
 670                 // Then multiply it with price
 671                 return price;
 672         }
 673
 674         /**
 675          * Handler for amount from request or session
 676          *
 677          * @param product Product instance
 678          * @param request Request instance
 679          * @param session Session instance
 680          * @return Amount as string
 681          */
 682         @Override
 683         public String handleAmountFromRequestSession (final Product product, final HttpServletRequest request, final HttpSession session) {
 684                 // Trace message
 685                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 686
 687                 // Is product and session set?
 688                 if (product == null) {
 689                         // Not set
 690                         throw new NullPointerException("product is null"); //NOI18N
 691                 } else if (request == null) {
 692                         // Not set
 693                         throw new NullPointerException("request is null"); //NOI18N
 694                 } else if (session == null) {
 695                         // Not set
 696                         throw new NullPointerException("session is null"); //NOI18N
 697                 }
 698
 699                 // Init variabke
 700                 Object object;
 701
 702                 // Check request method
 703                 if (!"POST".equals(request.getMethod())) { //NOI18N
 704                         // Not POST, so get from session
 705                         return this.getAmountFromSession(product, session);
 706                 } else if (this.handleChooseFromRequestSession(product, request, session).isEmpty()) {
 707                         // Not choosen
 708                         this.clearSessionAttribute(product, session, HTTP_PARAM_AMOUNT);
 709                         this.getLogger().debug(MessageFormat.format("Unsetting for product={0} in session, returning zero ...", product.getId())); //NOI18N
 710                         return "0"; //NOI18N
 711                 }
 712
 713                 // Get attribute from request
 714                 object = request.getParameter(String.format(HTTP_PARAM_MASK, HTTP_PARAM_AMOUNT, product.getId()));
 715
 716                 // Is it set?
 717                 if (object instanceof String) {
 718                         // Try to parse it to integer
 719                         try {
 720                                 Integer value = Integer.valueOf((String) object);
 721                         } catch (final NumberFormatException ex) {
 722                                 // Not valid input
 723                                 this.getLogger().warn(ex);
 724                                 return "0"; //NOI18N
 725                         }
 726
 727                         // Then set it in session
 728                         this.setValueInSession(product, session, HTTP_PARAM_AMOUNT, object);
 729
 730                         // And return it
 731                         return (String) object;
 732                 }
 733
 734                 // Trace message
 735                 this.getLogger().trace("Calling getAmountFromSession() ..."); //NOI18N
 736
 737                 // Get attribute from session
 738                 return this.getAmountFromSession(product, session);
 739         }
 740
 741         /**
 742          * Checks whether the given product is choosen, request overules session.
 743          *
 744          * @param product Product instance
 745          * @param request Request instance
 746          * @param session Session instance
 747          * @return Whether the product is choosen
 748          */
 749         @Override
 750         public boolean isProductChoosen (final Product product, final HttpServletRequest request, final HttpSession session) {
 751                 // Trace message
 752                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
 753
 754                 // Is product and session set?
 755                 if (product == null) {
 756                         // Not set
 757                         throw new NullPointerException("product is null"); //NOI18N
 758                 } else if (request == null) {
 759                         // Not set
 760                         throw new NullPointerException("request is null"); //NOI18N
 761                 } else if (session == null) {
 762                         // Not set
 763                         throw new NullPointerException("session is null"); //NOI18N
 764                 }
 765
 766                 // Get choosen
 767                 this.getLogger().debug(MessageFormat.format("Calling handleChooseFromRequestSession({0},{1},{2}) ...", product.getId(), request, session)); //NOI18N
 768                 String choosen = this.handleChooseFromRequestSession(product, request, session);
 769                 this.getLogger().debug(MessageFormat.format("product={0},choosen={1}", product.getId(), choosen)); //NOI18N
 770
 771                 // Must not be null
 772                 assert(choosen instanceof String): "choosen is null"; //NOI18N
 773
 774                 // Is it not choosen?
 775                 if (choosen.isEmpty()) {
 776                         // Not choosen
 777                         return false;
 778                 }
 779
 780                 // Get amount
 781                 String amount = this.handleAmountFromRequestSession(product, request, session);
 782
 783                 // Must not be null
 784                 assert(amount instanceof String): "amount is not set"; //NOI18N
 785
 786                 // Trace message
 787                 this.getLogger().trace(MessageFormat.format("amount={0} - EXIT!", amount)); //NOI18N
 788
 789                 // Must not be empty and not 0
 790                 return (!amount.isEmpty() && !"0".equals(amount)); //NOI18N
 791         }
 792
 793         /**
 794          * Marks all choosen products as ordered
 795          *
 796          * @param request Request instance
 797          * @param session Session instance
 798          */
 799         @Override
 800         public void markAllChoosenProductsAsOrdered (final HttpServletRequest request, final HttpSession session) throws ServletException {
 801                 // Trace message
 802                 this.getLogger().trace(MessageFormat.format("request={0},session={1} - CALLED!", request, session)); //NOI18N
 803
 804                 // Init iterator
 805                 Iterator<Product> iterator = this.getAvailableProducts();
 806
 807                 // "Walk" over all products
 808                 while (iterator.hasNext()) {
 809                         // Get next product
 810                         Product product = iterator.next();
 811
 812                         // Debug message
 813                         this.getLogger().debug(MessageFormat.format("product={0}", product)); //NOI18N
 814
 815                         // Is it choosen?
 816                         if (this.isProductChoosen(product, request, session)) {
 817                                 // Mark product as ordered
 818                                 this.markProductAsOrdered(product, session);
 819                         }
 820                 }
 821
 822                 // Trace message
 823                 this.getLogger().trace("EXIT!"); //NOI18N
 824         }
 825
 826         /**
 827          * Marks given product as choosen in session
 828          *
 829          * @param product Product to mark as ordered
 830          * @param session Session instance
 831          */
 832         @Override
 833         public void markProductAsChoosen (final Product product, final HttpSession session) {
 834                 // Trace message
 835                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 836
 837                 // Is product and session set?
 838                 if (product == null) {
 839                         // Not set
 840                         throw new NullPointerException("product is null"); //NOI18N
 841                 } else if (session == null) {
 842                         // Not set
 843                         throw new NullPointerException("session is null"); //NOI18N
 844                 }
 845
 846                 // Mark it as ordered by setting flag
 847                 this.getLogger().debug(MessageFormat.format("Marking product={0} as choosen.", product.getId())); //NOI18N
 848                 this.setValueInSession(product, session, HTTP_PARAM_ITEM_ID, "1"); //NOI18N
 849
 850                 // Trace message
 851                 this.getLogger().trace("EXIT!"); //NOI18N
 852         }
 853
 854         /**
 855          * Marks given product as ordered in session
 856          *
 857          * @param product Product to mark as ordered
 858          * @param session Session instance
 859          */
 860         @Override
 861         public void markProductAsOrdered (final Product product, final HttpSession session) {
 862                 // Trace message
 863                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 864
 865                 // Is product and session set?
 866                 if (product == null) {
 867                         // Not set
 868                         throw new NullPointerException("product is null"); //NOI18N
 869                 } else if (session == null) {
 870                         // Not set
 871                         throw new NullPointerException("session is null"); //NOI18N
 872                 }
 873
 874                 // Mark it as ordered by setting flag
 875                 this.getLogger().debug(MessageFormat.format("Marking product={0} as ordered.", product.getId())); //NOI18N
 876                 this.setValueInSession(product, session, SESSION_ORDERED, "true"); //NOI18N
 877
 878                 // Trace message
 879                 this.getLogger().trace("EXIT!"); //NOI18N
 880         }
 881
 882         /**
 883          * Somewhat setter in session
 884          *
 885          * @param session Session instance
 886          * @param key Session key to set
 887          * @param value Value to set
 888          */
 889         @Override
 890         public void setValueInSession (final HttpSession session, final String key, final Object value) {
 891                 // Trace message
 892                 this.getLogger().trace(MessageFormat.format("session={0},key={1},value={2} - CALLED!", session, key, value)); //NOI18N
 893
 894                 synchronized(session) {
 895                         // Set it synced
 896                         session.setAttribute(key, value);
 897                 }
 898
 899                 // Trace message
 900                 this.getLogger().trace("EXIT!"); //NOI18N
 901         }
 902
 903         /**
 904          * Unmarks given product as choosen in session
 905          *
 906          * @param product Product to unmark as choosen
 907          * @param session Session instance
 908          */
 909         @Override
 910         public void unmarkProductAsChoosen (final Product product, final HttpSession session) {
 911                 // Trace message
 912                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 913
 914                 // Is product and session set?
 915                 if (product == null) {
 916                         // Not set
 917                         throw new NullPointerException("product is null"); //NOI18N
 918                 } else if (session == null) {
 919                         // Not set
 920                         throw new NullPointerException("session is null"); //NOI18N
 921                 }
 922
 923                 // Mark it as ordered by setting flag
 924                 this.getLogger().debug(MessageFormat.format("Unmarking product={0} as choosen.", product.getId())); //NOI18N
 925                 this.clearSessionAttribute(product, session, HTTP_PARAM_ITEM_ID);
 926
 927                 // Trace message
 928                 this.getLogger().trace("EXIT!"); //NOI18N
 929         }
 930
 931         /**
 932          * Unmarks given product as ordered in session
 933          *
 934          * @param product Product to unmark as ordered
 935          * @param session Session instance
 936          */
 937         @Override
 938         public void unmarkProductAsOrdered (final Product product, final HttpSession session) {
 939                 // Trace message
 940                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
 941
 942                 // Is product and session set?
 943                 if (product == null) {
 944                         // Not set
 945                         throw new NullPointerException("product is null"); //NOI18N
 946                 } else if (session == null) {
 947                         // Not set
 948                         throw new NullPointerException("session is null"); //NOI18N
 949                 }
 950
 951                 // Mark it as ordered by setting flag
 952                 this.getLogger().debug(MessageFormat.format("Unmarking product={0} as ordered.", product.getId())); //NOI18N
 953                 this.clearSessionAttribute(product, session, SESSION_ORDERED);
 954
 955                 // Trace message
 956                 this.getLogger().trace("EXIT!"); //NOI18N
 957         }
 958
 959         /**
 960          * Clears given parameter for product in session
 961          *
 962          * @param product Product instance
 963          * @param session Session instance
 964          * @param parameter Parameter to clear
 965          */
 966         private void clearSessionAttribute (final Product product, final HttpSession session, final String parameter) {
 967                 // Trace message
 968                 this.getLogger().trace(MessageFormat.format("produce={0},parameter={1},session={2} - CALLED!", product, parameter, session)); //NOI18N
 969
 970                 // Clear in session
 971                 this.getLogger().debug(MessageFormat.format("Clearing product={0},parameter={1} ...", product.getId(), parameter)); //NOI18N
 972                 this.setValueInSession(product, session, parameter, null);
 973
 974                 // Trace message
 975                 this.getLogger().trace("EXIT!"); //NOI18N
 976         }
 977
 978         /**
 979          * Some getter for value from session
 980          *
 981          * @param product Product instance
 982          * @param session Session instance
 983          * @param attribute Attribute to get value from
 984          * @return Value from session
 985          */
 986         private Object getValueFromSession (final Product product, final HttpSession session, final String attribute) {
 987                 // Trace message
 988                 this.getLogger().trace(MessageFormat.format("product={0},session={1},attribute={2} - CALLED!", product, session, attribute)); //NOI18N
 989
 990                 // Init variable
 991                 Object value = this.getValueFromSession(session, String.format(HTTP_PARAM_MASK, attribute, product.getId()));
 992
 993                 this.getLogger().debug(MessageFormat.format("product={0},attribute={1},value={2}", product.getId(), attribute, value)); //NOI18N
 994
 995                 // Trace message
 996                 this.getLogger().trace(MessageFormat.format("value={0} - EXIT!", value)); //NOI18N
 997
 998                 // Return it
 999                 return value;
1000         }
1001
1002         /**
1003          * Some getter for value from session
1004          *
1005          * @param session Session instance
1006          * @param key Key to get value from
1007          * @return Value from session
1008          */
1009         private Object getValueFromSession (final HttpSession session, final String key) {
1010                 // Trace message
1011                 this.getLogger().trace(MessageFormat.format("session={0},key={1} - CALLED!", session, key)); //NOI18N
1012
1013                 // Init value
1014                 Object value;
1015
1016                 // Get it synchronized from session
1017                 synchronized (session) {
1018                         value = session.getAttribute(key);
1019                 }
1020
1021                 // Trace message
1022                 this.getLogger().trace(MessageFormat.format("value={0} - EXIT!", value)); //NOI18N
1023
1024                 // Return it
1025                 return value;
1026         }
1027
1028         /**
1029          * Handler for choosen (checkbox) from request or session
1030          *
1031          * @param product Product instance
1032          * @param request Request instance
1033          * @param session Session instance
1034          * @return Amount as string
1035          */
1036         private String handleChooseFromRequestSession (final Product product, final HttpServletRequest request, final HttpSession session) {
1037                 // Trace message
1038                 this.getLogger().trace(MessageFormat.format("product={0},request={1},session={2} - CALLED!", product, request, session)); //NOI18N
1039
1040                 // Is product and session set?
1041                 if (product == null) {
1042                         // Not set
1043                         throw new NullPointerException("product is null"); //NOI18N
1044                 } else if (request == null) {
1045                         // Not set
1046                         throw new NullPointerException("request is null"); //NOI18N
1047                 } else if (session == null) {
1048                         // Not set
1049                         throw new NullPointerException("session is null"); //NOI18N
1050                 }
1051
1052                 // Init variabke
1053                 Object object;
1054
1055                 // Check request method
1056                 if (!"POST".equals(request.getMethod())) { //NOI18N
1057                         // Not POST, so get from session
1058                         this.getLogger().trace(MessageFormat.format("Calling this.getChooseFromSession({0},{1}) ... - EXIT!", product.getId(), session)); //NOI18N
1059                         return this.getChooseFromSession(product, session);
1060                 } else if (this.isProductOrdered(product, session)) {
1061                         // Product is ordered
1062                         this.getLogger().trace(MessageFormat.format("Calling this.getChooseFromSession({0},{1}) ... - EXIT!", product.getId(), session)); //NOI18N
1063                         return this.getChooseFromSession(product, session);
1064                 } else if (!this.getChooseFromSession(product, session).isEmpty()) {
1065                         // Found in session
1066                         this.getLogger().trace(MessageFormat.format("Calling this.getChooseFromSession({0},{1}) ... - EXIT!", product.getId(), session)); //NOI18N
1067                         return this.getChooseFromSession(product, session);
1068                 }
1069
1070                 // Get reqzest element
1071                 object = request.getParameter(String.format(HTTP_PARAM_MASK, HTTP_PARAM_ITEM_ID, product.getId()));
1072                 this.getLogger().debug(MessageFormat.format("product={0},object={1}", product.getId(), object)); //NOI18N
1073
1074                 // Is it null?
1075                 if (object == null) {
1076                         // Unset session
1077                         this.getLogger().debug(MessageFormat.format("Unsetting session for product={0} ...", product.getId())); //NOI18N
1078                         this.clearSessionAttribute(product, session, HTTP_PARAM_ITEM_ID);
1079                         this.clearSessionAttribute(product, session, HTTP_PARAM_AMOUNT);
1080
1081                         // Return empty string
1082                         return ""; //NOI18N
1083                 }
1084
1085                 // Then set it in session
1086                 this.setValueInSession(product, session, HTTP_PARAM_ITEM_ID, object);
1087
1088                 // Cast to string and return it
1089                 this.getLogger().debug(MessageFormat.format("product={0} - Returning {1} ...", product.getId(), object)); //NOI18N
1090                 return (String) object;
1091         }
1092
1093         /**
1094          * Initializes database frontends.
1095          */
1096         private void initDatabaseFrontends () throws UnsupportedDatabaseBackendException, SQLException {
1097                 // Product frontend
1098                 this.productFrontend = new PizzaProductDatabaseFrontend();
1099
1100                 // Category frontend
1101                 this.categoryFrontend = new PizzaCategoryDatabaseFrontend();
1102         }
1103
1104         /**
1105          * Checks whether given category title is already used
1106          *
1107          * @param title Title of category to check
1108          * @return Whether it has been found
1109          */
1110         private boolean isCategoryTitleUsed(final String title) throws IOException, SQLException, BadTokenException, CorruptedDatabaseFileException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
1111                 // Delegate to frontend
1112                 return this.categoryFrontend.isCategoryTitleUsed(title);
1113         }
1114
1115         /**
1116          * Checks if given product title is already used
1117          * @param title Product title to check
1118          * @return Whether the product title has already been used
1119          */
1120         private boolean isProductTitleUsed (final String title) throws IOException, SQLException, BadTokenException, CorruptedDatabaseFileException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
1121                 // Delegate to frontend
1122                 return this.productFrontend.isProductTitleUsed(title);
1123         }
1124
1125         /**
1126          * Checks if the product ordered?
1127          *
1128          * @param product Product instance
1129          * @param session HttpSession instance
1130          * @return Whether the product has been ordered
1131          */
1132         private boolean isProductOrdered (final Product product, final HttpSession session) {
1133                 // Trace message
1134                 this.getLogger().trace(MessageFormat.format("product={0},session={1} - CALLED!", product, session)); //NOI18N
1135
1136                 // Get session
1137                 Object isOrdered = this.getValueFromSession(product, session, SESSION_ORDERED);
1138                 this.getLogger().debug(MessageFormat.format("product={0},isOrdered={1}", product.getId(), isOrdered)); //NOI18N
1139
1140                 // Return result
1141                 return ("true".equals(isOrdered)); //NOI18N
1142         }
1143
1144         /**
1145          * Somewhat setter in session
1146          *
1147          * @param product Product instance
1148          * @param session Session instance
1149          * @param keyPart Key part to include in final key
1150          * @param value Value to set
1151          */
1152         private void setValueInSession (final Product product, final HttpSession session, final String keyPart, final Object value) {
1153                 // Trace message
1154                 this.getLogger().trace(MessageFormat.format("product={0},session={1},keyPart={2},value={3} - CALLED!", product, session, keyPart, value)); //NOI18N
1155
1156                 // Set it synced
1157                 this.getLogger().debug(MessageFormat.format("Setting value={0} for product={1},keyPart={2}", value, product.getId(), keyPart)); //NOI18N
1158                 this.setValueInSession(session, String.format(HTTP_PARAM_MASK, keyPart, product.getId()), value);
1159
1160                 // Trace message
1161                 this.getLogger().trace("EXIT!"); //NOI18N
1162         }
1163
1164         /**
1165          * Application starter
1166          */
1167         private void start() {
1168                 // Init bundle
1169                 this.initBundle();
1170
1171                 try {
1172                         // Init properties
1173                         this.initProperties();
1174                 } catch (final IOException ex) {
1175                         // Abort here
1176                         this.abortProgramWithException(ex);
1177                 }
1178
1179                 // Init instance
1180                 Iterator<Product> iterator = null;
1181
1182                 try {
1183                         // Get iterator
1184                         iterator = this.getAvailableProducts();
1185                 } catch (final ServletException ex) {
1186                         this.abortProgramWithException(ex);
1187                 }
1188
1189                 // "Walk" over all products
1190                 while ((iterator instanceof Iterator) && (iterator.hasNext())) {
1191                         // Get next product
1192                         Product product = iterator.next();
1193
1194                         // Output data
1195                         this.getLogger().debug(MessageFormat.format("Product {0}, {1}: {2}", product.getId(), product.getTitle(), product.getPrice())); //NOI18N
1196                 }
1197
1198                 // Generate fake Customer instance
1199                 Customer customer = new PizzaServiceCustomer();
1200
1201                 /*
1202                 * Need a least a gender ... :( See, that is why I don't like default
1203                 * constructors, you can easily miss something important and bam! You
1204                 * get an NPE. The fix here is, to have construtors (or factories) which
1205                 * requires all required instances that needs to be set to get a
1206                 * consitent object back.
1207                 */
1208
1209                 // Gender is MALE now
1210                 customer.setGender(Gender.MALE);
1211
1212                 // Init iterator
1213                 Iterator<Map.Entry<Field, Object>> it = null;
1214
1215                 try {
1216                         // Get iterator on all its fields
1217                         it = customer.iterator();
1218                 } catch (final NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
1219                         this.abortProgramWithException(ex);
1220                 }
1221
1222                 // Output it
1223                 while ((it instanceof Iterator) && (it.hasNext())) {
1224                         Map.Entry<Field, Object> entry = it.next();
1225                         this.getLogger().debug(MessageFormat.format("entry {0}={1}", entry.getKey(), entry.getValue())); //NOI18N
1226                 }
1227         }
1228
1229         /**
1230          * Adds given category data from request to database
1231          *
1232          * @param request Request instance
1233          */
1234         @Override
1235         public void doAdminAddCategory (final HttpServletRequest request) throws ServletException, CategoryTitleAlreadyUsedException {
1236                 // Trace message
1237                 this.getLogger().trace(MessageFormat.format("request={0} - CALLED!", request)); //NOI18N
1238
1239                 // request must not be null
1240                 if (request == null) {
1241                         // Is null
1242                         throw new NullPointerException("request is null"); //NOI18N
1243                 }
1244
1245                 // Get all fields
1246                 String title = request.getParameter(PizzaCategoryDatabaseConstants.COLUMN_TITLE);
1247                 String parent = request.getParameter(PizzaCategoryDatabaseConstants.COLUMN_PARENT);
1248
1249                 // Debug message
1250                 this.getLogger().debug(MessageFormat.format("title={0},parent={1}", title, parent)); //NOI18N
1251
1252                 // Init variables for casting
1253                 Integer id = 0;
1254
1255                 // Check all fields
1256                 if (title == null) {
1257                         // "title" not set
1258                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaCategoryDatabaseConstants.COLUMN_TITLE)); //NOI18N
1259                 } else if (title.isEmpty()) {
1260                         // Is left empty
1261                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaCategoryDatabaseConstants.COLUMN_TITLE)); //NOI18N
1262                 } else if ((parent != null) && (!parent.isEmpty())) {
1263                         // "parent" is set, so check it
1264                         try {
1265                                 id = Integer.parseInt(parent);
1266                         } catch (final NumberFormatException e) {
1267                                 // Not valid number
1268                                 throw new IllegalArgumentException(e);
1269                         }
1270                 }
1271
1272                 try {
1273                         // Try to check if title is used already
1274                         if (this.isCategoryTitleUsed(title)) {
1275                                 // Title already used
1276                                 throw new CategoryTitleAlreadyUsedException(request);
1277                         }
1278                 } catch (final IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
1279                         throw new ServletException(ex);
1280                 }
1281
1282                 try {
1283                         // The category is not found, so add it to database
1284                         this.categoryFrontend.addCategory(title, id);
1285                 } catch (final SQLException | IOException ex) {
1286                         // Continue to throw it
1287                         throw new ServletException(ex);
1288                 }
1289
1290                 // Trace message
1291                 this.getLogger().trace("EXIT!"); //NOI18N
1292         }
1293
1294         /**
1295          * Adds given product data from request to database
1296          *
1297          * @param request Request instance
1298          */
1299         @Override
1300         public void doAdminAddProduct (final HttpServletRequest request) throws ServletException, ProductTitleAlreadyUsedException {
1301                 // Trace message
1302                 this.getLogger().trace(MessageFormat.format("request={0} - CALLED!", request)); //NOI18N
1303
1304                 // request must not be null
1305                 if (request == null) {
1306                         // Is null
1307                         throw new NullPointerException("request is null"); //NOI18N
1308                 }
1309
1310                 // Get title, price and category id
1311                 String title = request.getParameter(PizzaProductDatabaseConstants.COLUMN_TITLE);
1312                 String price = request.getParameter(PizzaProductDatabaseConstants.COLUMN_PRICE);
1313                 String category = request.getParameter(PizzaProductDatabaseConstants.COLUMN_CATEGORY);
1314                 String available = request.getParameter(PizzaProductDatabaseConstants.COLUMN_AVAILABLE);
1315
1316                 // Debug message
1317                 this.getLogger().debug(MessageFormat.format("title={0},price={1},category={2},available={3}", title, price, category, available)); //NOI18N
1318
1319                 // Variables for converting
1320                 Long id = null;
1321                 Float p = null;
1322
1323                 // Check all fields
1324                 if (title == null) {
1325                         // "title" not set
1326                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_TITLE)); //NOI18N
1327                 } else if (title.isEmpty()) {
1328                         // Is left empty
1329                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_TITLE)); //NOI18N
1330                 } else if (price == null) {
1331                         // "price" not set
1332                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_PRICE)); //NOI18N
1333                 } else if (price.isEmpty()) {
1334                         // Is left empty
1335                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_PRICE)); //NOI18N
1336                 } else if (category == null) {
1337                         // "title" not set
1338                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_CATEGORY)); //NOI18N
1339                 } else if (category.isEmpty()) {
1340                         // Is left empty
1341                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_CATEGORY)); //NOI18N
1342                 } else if (available == null) {
1343                         // "title" not set
1344                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_AVAILABLE)); //NOI18N
1345                 } else if (available.isEmpty()) {
1346                         // Is left empty
1347                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_AVAILABLE)); //NOI18N
1348                 } else if ((!"true".equals(available)) && (!"false".equals(available))) { //NOI18N
1349                         // Invalid value
1350                         throw new IllegalArgumentException(MessageFormat.format("{0} is invalid: {1}", PizzaProductDatabaseConstants.COLUMN_AVAILABLE, available)); //NOI18N
1351                 }
1352
1353                 // Parse numbers
1354                 try {
1355                         id = Long.parseLong(category);
1356                         p = Float.parseFloat(price);
1357                 } catch (final NumberFormatException e) {
1358                         // Not valid number
1359                         throw new IllegalArgumentException(e);
1360                 }
1361
1362                 // Parse boolean
1363                 Boolean a = Boolean.parseBoolean(available);
1364
1365                 // Test on product title
1366                 try {
1367                         // Try to check if title is used already
1368                         if (this.isProductTitleUsed(title)) {
1369                                 // Title already used
1370                                 throw new ProductTitleAlreadyUsedException(request);
1371                         }
1372                 } catch (final IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
1373                         throw new ServletException(ex);
1374                 }
1375
1376                 try {
1377                         // The product is not found, so add it to database
1378                         this.productFrontend.addProduct(title, p, id, a);
1379                 } catch (final SQLException | IOException ex) {
1380                         // Continue to throw it
1381                         throw new ServletException(ex);
1382                 }
1383
1384                 // Trace message
1385                 this.getLogger().trace("EXIT!"); //NOI18N
1386         }
1387
1388         /**
1389          * Generates link HTML code for given category's parent id, if set. This
1390          * link then points to products.jsp?category_id=x
1391          *
1392          * @param category Category instance
1393          * @return HTML code
1394          */
1395         @Override
1396         public String generateLinkForParent (final Category category) {
1397                 // Trace message
1398                 this.getLogger().trace(MessageFormat.format("category={0} - CALLED!", category)); //NOI18N
1399
1400                 // category must not be null
1401                 if (category == null) {
1402                         // Is null
1403                         throw new NullPointerException("category is null"); //NOI18N
1404                 }
1405
1406                 // Get parent id
1407                 Long parent = category.getParent();
1408
1409                 // Is the id set?
1410                 if (parent > 0) {
1411                         // Product HTML code for link
1412                         throw new UnsupportedOperationException(MessageFormat.format("parent={0} - Unfinished!", parent)); //NOI18N
1413                 }
1414
1415                 // No parent set
1416                 return "Keine";
1417         }
1418
1419         @Override
1420         public String getPrintableProduktCategory (final Product product) throws ServletException {
1421                 // Trace message
1422                 this.getLogger().trace(MessageFormat.format("product={0} - CALLED!", product)); //NOI18N
1423
1424                 // product must not be null
1425                 if (product == null) {
1426                         // Abort here
1427                         throw new NullPointerException("product is null"); //NOI18N
1428                 }
1429
1430                 // Declare category
1431                 Category category;
1432
1433                 try {
1434                         // Get Category instance from product over the frontend
1435                         category = this.categoryFrontend.getCategory(product);
1436                 } catch (final IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) {
1437                         throw new ServletException(ex);
1438                 }
1439
1440                 // Debug message
1441                 this.getLogger().debug(MessageFormat.format("category={0}", category)); //NOI18N
1442
1443                 String title = null;
1444                 try {
1445                         // Now get title from it and return it
1446                         title = category.decodedTitle();
1447                 } catch (final UnsupportedEncodingException ex) {
1448                         // Continue to throw as cause
1449                         throw new ServletException(ex);
1450                 }
1451
1452                 // Trace message
1453                 this.getLogger().trace(MessageFormat.format("title={0} - EXIT!", title)); //NOI18N
1454
1455                 // Return it
1456                 return title;
1457         }
1458
1459         /**
1460          * Checks if product's title is already used.
1461          *
1462          * @param request Request instance
1463          * @return Whether the product title is already used
1464          * @throws java.io.IOException If any IO error occurs
1465          * @throws org.mxchange.jcore.exceptions.BadTokenException If a bad token was found in a file-based database backend's file ... ;-)
1466          * @throws java.sql.SQLException If any SQL error occurs
1467          * @throws org.mxchange.jcore.exceptions.CorruptedDatabaseFileException If the database file is damaged
1468          * @throws java.lang.NoSuchMethodException If a method was not found
1469          * @throws java.lang.IllegalAccessException If the method cannot be accessed
1470          * @throws java.lang.reflect.InvocationTargetException Any other problems?
1471          */
1472         private boolean isProductTitleUsed (final HttpServletRequest request) throws IOException, SQLException, BadTokenException, CorruptedDatabaseFileException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
1473                 // Trace message
1474                 this.getLogger().trace(MessageFormat.format("request={0} - CALLED!", request)); //NOI18N
1475
1476                 // Init title
1477                 String title = request.getParameter(PizzaProductDatabaseConstants.COLUMN_TITLE);
1478
1479                 // request must not be null and "title" must be found and non-empty
1480                 if (request == null) {
1481                         // Abort here
1482                         throw new NullPointerException("request is null"); //NOI18N
1483                 } else if (title == null) {
1484                         // title is not set
1485                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaProductDatabaseConstants.COLUMN_TITLE)); //NOI18N
1486                 } else if (title.isEmpty()) {
1487                         // Is left empty
1488                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaProductDatabaseConstants.COLUMN_TITLE)); //NOI18N
1489                 }
1490
1491                 // Default is not used
1492                 boolean isUsed = this.isProductTitleUsed(title);
1493
1494                 // Trace message
1495                 this.getLogger().trace(MessageFormat.format("isUsed={0} - EXIT!", isUsed)); //NOI18N
1496
1497                 // Return it
1498                 return isUsed;
1499         }
1500
1501         /**
1502          * Handles admin form requests
1503          * @param request Request instance
1504          * @param response Response instance
1505          * @throws ServletException If something unexpected happened
1506          */
1507         @Override
1508         public void doAdminHandleProductForms (final HttpServletRequest request, final HttpServletResponse response) throws ServletException {
1509                 // Trace message
1510                 this.getLogger().trace(MessageFormat.format("request={0},response={1} - CALLED!", request, response)); //NOI18N
1511
1512                 // request and response must both be set
1513                 if (request == null) {
1514                         // request is null
1515                         throw new NullPointerException("request is null"); //NOI18N
1516                 } else if (response == null) {
1517                         // response is null
1518                         throw new NullPointerException("response is null"); //NOI18N
1519                 }
1520
1521                 // Try this operations
1522                 try {
1523                         // Is it post?
1524                         if ("POST".equals(request.getMethod())) { //NOI18N
1525                                 // Is "add/edit/delete" set?
1526                                 if (request.getParameter("add") != null) { //NOI18N
1527                                         // Is it already added?
1528                                         if (this.isProductTitleUsed(request)) {
1529                                                 // Debug message
1530                                                 this.getLogger().debug("Already used, redirecting ..."); //NOI18N
1531
1532                                                 // Already added, so redirect here, else a ServletException will be thrown
1533                                                 response.sendRedirect(String.format("%s/admin/product.jsp?already=1", request.getContextPath())); //NOI18N
1534                                         } else {
1535                                                 // Add new product
1536                                                 this.doAdminAddProduct(request);
1537                                         }
1538                                 } else if (request.getParameter("edit") != null) { //NOI18N
1539                                         // @TODO
1540                                 } else if (request.getParameter("delete") != null) { //NOI18N
1541                                         // @TODO
1542                                 }
1543
1544                                 // Redirect to proper URL
1545                                 // @TODO Commented out for developing:
1546                                 //response.sendRedirect(request.getContextPath() + "/finished.jsp");
1547                         }
1548                 } catch (final IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | ProductTitleAlreadyUsedException | NoSuchMethodException | IllegalAccessException | InvocationTargetException | IllegalArgumentException ex) {
1549                         // Throw it as cause
1550                         throw new ServletException(ex);
1551                 }
1552
1553                 // Trace message
1554                 this.getLogger().trace("EXIT!"); //NOI18N
1555         }
1556
1557         /**
1558          * Handles admin form requests
1559          * @param request Request instance
1560          * @param response Response instance
1561          * @throws ServletException If something unexpected happened
1562          */
1563         @Override
1564         public void doAdminHandleCategoryForms (final HttpServletRequest request, final HttpServletResponse response) throws ServletException {
1565                 // Trace message
1566                 this.getLogger().trace(MessageFormat.format("request={0},response={1} - CALLED!", request, response)); //NOI18N
1567
1568                 // request and response must both be set
1569                 if (request == null) {
1570                         // request is null
1571                         throw new NullPointerException("request is null"); //NOI18N
1572                 } else if (response == null) {
1573                         // response is null
1574                         throw new NullPointerException("response is null"); //NOI18N
1575                 }
1576
1577                 // Try this operations
1578                 try {
1579                         // Is it post?
1580                         if ("POST".equals(request.getMethod())) { //NOI18N
1581                                 // Is "add/edit/delete" set?
1582                                 if (request.getParameter("add") != null) { //NOI18N
1583                                         // Is the category title already used?
1584                                         if (this.isCategoryTitleUsed(request)) {
1585                                                 // Debug message
1586                                                 this.getLogger().debug("Already used, redirecting ..."); //NOI18N
1587
1588                                                 // Already added, so redirect here, else a ServletException will be thrown
1589                                                 response.sendRedirect(String.format("%s/admin/category.jsp?already=1", request.getContextPath())); //NOI18N
1590                                         } else {
1591                                                 // Add new category
1592                                                 this.doAdminAddCategory(request);
1593                                         }
1594                                 } else if (request.getParameter("edit") != null) { //NOI18N
1595                                         // @TODO
1596                                 } else if (request.getParameter("delete") != null) { //NOI18N
1597                                         // @TODO
1598                                 }
1599
1600                                 // Redirect to proper URL
1601                                 // @TODO Commented out for developing:
1602                                 //response.sendRedirect(request.getContextPath() + "/finished.jsp");
1603                         }
1604                 } catch (final IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | CategoryTitleAlreadyUsedException | NoSuchMethodException | IllegalAccessException | InvocationTargetException | IllegalArgumentException ex) {
1605                         // Throw it as cause
1606                         throw new ServletException(ex);
1607                 }
1608
1609                 // Trace message
1610                 this.getLogger().trace("EXIT!"); //NOI18N
1611         }
1612
1613         /**
1614          * Checks if category's title is already used.
1615          *
1616          * @param request Request instance
1617          * @return Whether the product title is already used
1618          * @throws java.io.IOException If any IO error occurs
1619          * @throws org.mxchange.jcore.exceptions.BadTokenException If a bad token was found in a file-based database backend's file ... ;-)
1620          * @throws java.sql.SQLException If any SQL error occurs
1621          * @throws org.mxchange.jcore.exceptions.CorruptedDatabaseFileException If the database file is damaged
1622          * @throws java.lang.NoSuchMethodException If a method was not found
1623          * @throws java.lang.IllegalAccessException If the method cannot be accessed
1624          * @throws java.lang.reflect.InvocationTargetException Any other problems?
1625          */
1626         private boolean isCategoryTitleUsed (final HttpServletRequest request) throws IOException, SQLException, BadTokenException, CorruptedDatabaseFileException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
1627                 // Trace message
1628                 this.getLogger().trace(MessageFormat.format("request={0} - CALLED!", request)); //NOI18N
1629
1630                 // Init title
1631                 String title = request.getParameter(PizzaCategoryDatabaseConstants.COLUMN_TITLE);
1632
1633                 // request must not be null and "title" must be found and non-empty
1634                 if (request == null) {
1635                         // Abort here
1636                         throw new NullPointerException("request is null"); //NOI18N
1637                 } else if (title == null) {
1638                         // title is not set
1639                         throw new IllegalArgumentException(MessageFormat.format("{0} is not set.", PizzaCategoryDatabaseConstants.COLUMN_TITLE)); //NOI18N
1640                 } else if (title.isEmpty()) {
1641                         // Is left empty
1642                         throw new IllegalArgumentException(MessageFormat.format("{0} is empty.", PizzaCategoryDatabaseConstants.COLUMN_TITLE)); //NOI18N
1643                 }
1644
1645                 // Default is not used
1646                 boolean isUsed = this.isCategoryTitleUsed(title);
1647
1648                 // Trace message
1649                 this.getLogger().trace(MessageFormat.format("isUsed={0} - EXIT!", isUsed)); //NOI18N
1650
1651                 // Return it
1652                 return isUsed;
1653         }
1654 }