git.mxchange.org Git - jfinancials-war.git/blob

   1 /*
   2  * Copyright (C) 2017, 2018 Free Software Foundation
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Affero General Public License as
   6  * published by the Free Software Foundation, either version 3 of the
   7  * License, or (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 Affero General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Affero General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.jfinancials.beans.product_category.list;
  18
  19 import fish.payara.cdi.jsr107.impl.NamedCache;
  20 import java.text.MessageFormat;
  21 import java.util.Comparator;
  22 import java.util.Iterator;
  23 import java.util.LinkedList;
  24 import java.util.List;
  25 import java.util.Objects;
  26 import javax.annotation.PostConstruct;
  27 import javax.cache.Cache;
  28 import javax.ejb.EJB;
  29 import javax.enterprise.event.Observes;
  30 import javax.faces.view.ViewScoped;
  31 import javax.inject.Inject;
  32 import javax.inject.Named;
  33 import org.mxchange.jfinancials.beans.BaseFinancialsBean;
  34 import org.mxchange.jproduct.events.category.added.AddedCategoryEvent;
  35 import org.mxchange.jproduct.exceptions.category.CategoryNotFoundException;
  36 import org.mxchange.jproduct.model.category.Category;
  37 import org.mxchange.jproduct.model.category.CategorySessionBeanRemote;
  38
  39 /**
  40  * A view-scoped bean for product lists
  41  * <p>
  42  * @author Roland Haeder<roland@mxchange.org>
  43  */
  44 @Named ("categoryListController")
  45 @ViewScoped
  46 public class FinancialsCategoryListWebViewBean extends BaseFinancialsBean implements FinancialsCategoryListWebViewController {
  47
  48         /**
  49          * Serial number
  50          */
  51         private static final long serialVersionUID = 34_869_872_672_644L;
  52
  53         /**
  54          * List of all categories
  55          */
  56         private final List<Category> allCategories;
  57
  58         /**
  59          * EJB for general category stuff
  60          */
  61         @EJB (lookup = "java:global/jfinancials-ejb/category!org.mxchange.jproduct.model.category.CategorySessionBeanRemote")
  62         private CategorySessionBeanRemote categoryBean;
  63
  64         /**
  65          * Cache for all product categories
  66          */
  67         @Inject
  68         @NamedCache (cacheName = "categoryCache")
  69         private transient Cache<Long, Category> categoryCache;
  70
  71         /**
  72          * A list of filtered categories
  73          */
  74         private List<Category> filteredCategories;
  75
  76         /**
  77          * Selected category
  78          */
  79         private Category selectedCategory;
  80
  81         /**
  82          * Default constructor
  83          */
  84         public FinancialsCategoryListWebViewBean () {
  85                 // Call super constructor
  86                 super();
  87
  88                 // Init list
  89                 this.allCategories = new LinkedList<>();
  90         }
  91
  92         /**
  93          * Observes events fired after a new product category has been added
  94          * <p>
  95          * @param event Event to be observed
  96          */
  97         public void afterCategoryAddedEvent (@Observes final AddedCategoryEvent event) {
  98                 // Is all valid?
  99                 if (null == event) {
 100                         // Throw NPE
 101                         throw new NullPointerException("event is null"); //NOI18N
 102                 } else if (event.getAddedCategory() == null) {
 103                         // Throw again ...
 104                         throw new NullPointerException("event.addedCategory is null"); //NOI18N
 105                 } else if (event.getAddedCategory().getCategoryId() == null) {
 106                         // And again ...
 107                         throw new NullPointerException("event.addedCategory.categoryId is null"); //NOI18N
 108                 } else if (event.getAddedCategory().getCategoryId() < 1) {
 109                         // Id is invalid
 110                         throw new IllegalArgumentException(MessageFormat.format("event.addedCategory.categoryId={0} is not valid.", event.getAddedCategory().getCategoryId())); //NOI18N
 111                 }
 112
 113                 // Add the category
 114                 this.categoryCache.put(event.getAddedCategory().getCategoryId(), event.getAddedCategory());
 115                 this.getAllCategories().add(event.getAddedCategory());
 116         }
 117
 118         @Override
 119         public Category findCategoryById (final Long categoryId) throws CategoryNotFoundException {
 120                 // Validate parameter
 121                 if (null == categoryId) {
 122                         // Throw NPE
 123                         throw new NullPointerException("categoryId is null"); //NOI18N
 124                 } else if (categoryId < 1) {
 125                         // Throw IAE
 126                         throw new IllegalArgumentException("categoryId=" + categoryId + " is invalid"); //NOI18N
 127                 } else if (!this.categoryCache.containsKey(categoryId)) {
 128                         // Not found
 129                         throw new CategoryNotFoundException(categoryId);
 130                 }
 131
 132                 // Get it from cache
 133                 final Category category = this.categoryCache.get(categoryId);
 134
 135                 // Return it
 136                 return category;
 137         }
 138
 139         /**
 140          * Getter for a list of all categories
 141          * <p>
 142          * @return All categories
 143          */
 144         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 145         public List<Category> getAllCategories () {
 146                 // Return it
 147                 return this.allCategories;
 148         }
 149
 150         /**
 151          * Getter for filtered category list
 152          * <p>
 153          * @return Filtered category list
 154          */
 155         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 156         public List<Category> getFilteredCategories () {
 157                 return this.filteredCategories;
 158         }
 159
 160         /**
 161          * Setter for filtered category list
 162          * <p>
 163          * @param filteredCategories Filtered category list
 164          */
 165         @SuppressWarnings ("AssignmentToCollectionOrArrayFieldFromParameter")
 166         public void setFilteredCategories (final List<Category> filteredCategories) {
 167                 this.filteredCategories = filteredCategories;
 168         }
 169
 170         /**
 171          * Getter for selected category
 172          * <p>
 173          * @return Selected category
 174          */
 175         public Category getSelectedCategory () {
 176                 return this.selectedCategory;
 177         }
 178
 179         /**
 180          * Setter for selected category
 181          * <p>
 182          * @param selectedCategory Selected category
 183          */
 184         public void setSelectedCategory (final Category selectedCategory) {
 185                 this.selectedCategory = selectedCategory;
 186         }
 187
 188         /**
 189          * Initialization of this bean
 190          */
 191         @PostConstruct
 192         public void init () {
 193                 // Is cache there?
 194                 if (!this.categoryCache.iterator().hasNext()) {
 195                         // Get whole list from EJB
 196                         final List<Category> categories = this.categoryBean.allCategories();
 197
 198                         // "Walk" through all entries and add to cache
 199                         for (final Category category : categories) {
 200                                 // Add it by primary key
 201                                 this.categoryCache.put(category.getCategoryId(), category);
 202                         }
 203                 }
 204
 205                 // Is the list empty, but filled cache?
 206                 if (this.allCategories.isEmpty() && this.categoryCache.iterator().hasNext()) {
 207                         // Get iterator
 208                         final Iterator<Cache.Entry<Long, Category>> iterator = this.categoryCache.iterator();
 209
 210                         // Build up list
 211                         while (iterator.hasNext()) {
 212                                 // GEt next element
 213                                 final Cache.Entry<Long, Category> next = iterator.next();
 214
 215                                 // Add to list
 216                                 this.allCategories.add(next.getValue());
 217                         }
 218
 219                         // Sort list
 220                         this.allCategories.sort(new Comparator<Category>() {
 221                                 @Override
 222                                 public int compare (final Category o1, final Category o2) {
 223                                         return o1.getCategoryId() > o2.getCategoryId() ? 1 : o1.getCategoryId() < o2.getCategoryId() ? -1 : 0;
 224                                 }
 225                         }
 226                         );
 227
 228                         // Set whole list
 229                         this.setFilteredCategories(this.getAllCategories());
 230                 }
 231         }
 232
 233         @Override
 234         public boolean isCategoryI18nKeyAdded (final String categoryI18nKey) {
 235                 // Validate parameter
 236                 if (null == categoryI18nKey) {
 237                         // Throw NPE
 238                         throw new NullPointerException("categoryI18nKey is null"); //NOI18N
 239                 } else if (categoryI18nKey.isEmpty()) {
 240                         // Throw IAE
 241                         throw new IllegalArgumentException("categoryI18nKey is empty"); //NOI18N
 242                 }
 243
 244                 // Default is not the same
 245                 boolean isFound = false;
 246
 247                 // Check all added,products
 248                 for (final Category category : this.getAllCategories()) {
 249                         // Is i18n key the same?
 250                         if (Objects.equals(category.getCategoryI18nKey(), categoryI18nKey)) {
 251                                 // Found it
 252                                 isFound = true;
 253                                 break;
 254                         }
 255                 }
 256
 257                 // Return flag
 258                 return isFound;
 259         }
 260
 261 }