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

   1 /*
   2  * Copyright (C) 2017 - 2020 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.LinkedList;
  23 import java.util.List;
  24 import java.util.Objects;
  25 import javax.annotation.PostConstruct;
  26 import javax.cache.Cache;
  27 import javax.ejb.EJB;
  28 import javax.enterprise.event.Observes;
  29 import javax.faces.view.ViewScoped;
  30 import javax.inject.Inject;
  31 import javax.inject.Named;
  32 import org.mxchange.jfinancials.beans.BaseFinancialsBean;
  33 import org.mxchange.jproduct.events.category.added.AddedCategoryEvent;
  34 import org.mxchange.jproduct.exceptions.category.CategoryNotFoundException;
  35 import org.mxchange.jproduct.model.category.Category;
  36 import org.mxchange.jproduct.model.category.CategorySessionBeanRemote;
  37
  38 /**
  39  * A view-scoped bean for product lists
  40  * <p>
  41  * @author Roland Haeder<roland@mxchange.org>
  42  */
  43 @Named ("categoryListController")
  44 @ViewScoped
  45 public class FinancialsCategoryListWebViewBean extends BaseFinancialsBean implements FinancialsCategoryListWebViewController {
  46
  47         /**
  48          * Serial number
  49          */
  50         private static final long serialVersionUID = 34_869_872_672_644L;
  51
  52         /**
  53          * List of all categories
  54          */
  55         private final List<Category> allCategories;
  56
  57         /**
  58          * EJB for general category stuff
  59          */
  60         @EJB (lookup = "java:global/jfinancials-ejb/category!org.mxchange.jproduct.model.category.CategorySessionBeanRemote")
  61         private CategorySessionBeanRemote categoryBean;
  62
  63         /**
  64          * Cache for all product categories
  65          */
  66         @Inject
  67         @NamedCache (cacheName = "categoryCache")
  68         private transient Cache<Long, Category> categoryCache;
  69
  70         /**
  71          * A list of filtered categories
  72          */
  73         private List<Category> filteredCategories;
  74
  75         /**
  76          * Selected category
  77          */
  78         private Category selectedCategory;
  79
  80         /**
  81          * Default constructor
  82          */
  83         public FinancialsCategoryListWebViewBean () {
  84                 // Call super constructor
  85                 super();
  86
  87                 // Init list
  88                 this.allCategories = new LinkedList<>();
  89         }
  90
  91         /**
  92          * Observes events fired after a new product category has been added
  93          * <p>
  94          * @param event Event to be observed
  95          */
  96         public void afterCategoryAddedEvent (@Observes final AddedCategoryEvent event) {
  97                 // Is all valid?
  98                 if (null == event) {
  99                         // Throw NPE
 100                         throw new NullPointerException("event is null"); //NOI18N
 101                 } else if (event.getAddedCategory() == null) {
 102                         // Throw again ...
 103                         throw new NullPointerException("event.addedCategory is null"); //NOI18N
 104                 } else if (event.getAddedCategory().getCategoryId() == null) {
 105                         // And again ...
 106                         throw new NullPointerException("event.addedCategory.categoryId is null"); //NOI18N
 107                 } else if (event.getAddedCategory().getCategoryId() < 1) {
 108                         // Id is invalid
 109                         throw new IllegalArgumentException(MessageFormat.format("event.addedCategory.categoryId={0} is not valid.", event.getAddedCategory().getCategoryId())); //NOI18N
 110                 }
 111
 112                 // Add the category
 113                 this.categoryCache.put(event.getAddedCategory().getCategoryId(), event.getAddedCategory());
 114                 this.getAllCategories().add(event.getAddedCategory());
 115         }
 116
 117         @Override
 118         public Category findCategoryById (final Long categoryId) throws CategoryNotFoundException {
 119                 // Validate parameter
 120                 if (null == categoryId) {
 121                         // Throw NPE
 122                         throw new NullPointerException("categoryId is null"); //NOI18N
 123                 } else if (categoryId < 1) {
 124                         // Throw IAE
 125                         throw new IllegalArgumentException("categoryId=" + categoryId + " is invalid"); //NOI18N
 126                 } else if (!this.categoryCache.containsKey(categoryId)) {
 127                         // Not found
 128                         throw new CategoryNotFoundException(categoryId);
 129                 }
 130
 131                 // Get it from cache
 132                 final Category category = this.categoryCache.get(categoryId);
 133
 134                 // Return it
 135                 return category;
 136         }
 137
 138         /**
 139          * Getter for a list of all categories
 140          * <p>
 141          * @return All categories
 142          */
 143         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 144         public List<Category> getAllCategories () {
 145                 // Return it
 146                 return this.allCategories;
 147         }
 148
 149         /**
 150          * Getter for filtered category list
 151          * <p>
 152          * @return Filtered category list
 153          */
 154         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 155         public List<Category> getFilteredCategories () {
 156                 return this.filteredCategories;
 157         }
 158
 159         /**
 160          * Setter for filtered category list
 161          * <p>
 162          * @param filteredCategories Filtered category list
 163          */
 164         @SuppressWarnings ("AssignmentToCollectionOrArrayFieldFromParameter")
 165         public void setFilteredCategories (final List<Category> filteredCategories) {
 166                 this.filteredCategories = filteredCategories;
 167         }
 168
 169         /**
 170          * Getter for selected category
 171          * <p>
 172          * @return Selected category
 173          */
 174         public Category getSelectedCategory () {
 175                 return this.selectedCategory;
 176         }
 177
 178         /**
 179          * Setter for selected category
 180          * <p>
 181          * @param selectedCategory Selected category
 182          */
 183         public void setSelectedCategory (final Category selectedCategory) {
 184                 this.selectedCategory = selectedCategory;
 185         }
 186
 187         /**
 188          * Initialization of this bean
 189          */
 190         @PostConstruct
 191         public void init () {
 192                 // Is cache there?
 193                 if (!this.categoryCache.iterator().hasNext()) {
 194                         // Get whole list from EJB
 195                         final List<Category> categories = this.categoryBean.allCategories();
 196
 197                         // "Walk" through all entries and add to cache
 198                         for (final Category category : categories) {
 199                                 // Add it by primary key
 200                                 this.categoryCache.put(category.getCategoryId(), category);
 201                         }
 202                 }
 203
 204                 // Is the list empty, but filled cache?
 205                 if (this.allCategories.isEmpty() && this.categoryCache.iterator().hasNext()) {
 206                         // Build up list
 207                         for (final Cache.Entry<Long, Category> currentEntry : this.categoryCache) {
 208                                 // Add to list
 209                                 this.allCategories.add(currentEntry.getValue());
 210                         }
 211
 212                         // Sort list
 213                         this.allCategories.sort(new Comparator<Category>() {
 214                                 @Override
 215                                 public int compare (final Category category1, final Category category2) {
 216                                         return category1.getCategoryId() > category2.getCategoryId() ? 1 : category1.getCategoryId() < category2.getCategoryId() ? -1 : 0;
 217                                 }
 218                         }
 219                         );
 220
 221                         // Set whole list
 222                         this.setFilteredCategories(this.getAllCategories());
 223                 }
 224         }
 225
 226         @Override
 227         public boolean isCategoryI18nKeyAdded (final String categoryI18nKey) {
 228                 // Validate parameter
 229                 if (null == categoryI18nKey) {
 230                         // Throw NPE
 231                         throw new NullPointerException("categoryI18nKey is null"); //NOI18N
 232                 } else if (categoryI18nKey.isEmpty()) {
 233                         // Throw IAE
 234                         throw new IllegalArgumentException("categoryI18nKey is empty"); //NOI18N
 235                 }
 236
 237                 // Default is not the same
 238                 boolean isFound = false;
 239
 240                 // Check all added,products
 241                 for (final Category category : this.getAllCategories()) {
 242                         // Is i18n key the same?
 243                         if (Objects.equals(category.getCategoryI18nKey(), categoryI18nKey)) {
 244                                 // Found it
 245                                 isFound = true;
 246                                 break;
 247                         }
 248                 }
 249
 250                 // Return flag
 251                 return isFound;
 252         }
 253
 254 }