src/java/org/mxchange/jjobs/beans/business/department/list/JobsDepartmentListWebViewBean.java

   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.jjobs.beans.business.department.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 javax.annotation.PostConstruct;
  25 import javax.cache.Cache;
  26 import javax.ejb.EJB;
  27 import javax.enterprise.event.Observes;
  28 import javax.faces.view.ViewScoped;
  29 import javax.inject.Inject;
  30 import javax.inject.Named;
  31 import org.mxchange.jcontactsbusiness.events.department.added.ObservableDepartmentAddedEvent;
  32 import org.mxchange.jcontactsbusiness.exceptions.department.DepartmentNotFoundException;
  33 import org.mxchange.jcontactsbusiness.model.department.Department;
  34 import org.mxchange.jcontactsbusiness.model.department.DepartmentSessionBeanRemote;
  35 import org.mxchange.jcontactsbusiness.model.department.Departments;
  36 import org.mxchange.jjobs.beans.BaseJobsBean;
  37
  38 /**
  39  * A list bean for departments
  40  * <p>
  41  * @author Roland Häder<roland@mxchange.org>
  42  */
  43 @Named ("departmentListController")
  44 @ViewScoped
  45 public class JobsDepartmentListWebViewBean extends BaseJobsBean implements JobsDepartmentListWebViewController {
  46
  47         /**
  48          * Serial number
  49          */
  50         private static final long serialVersionUID = 5_028_697_360_462L;
  51
  52         /**
  53          * A list of all departments
  54          */
  55         private final List<Department> allDepartments;
  56
  57         /**
  58          * EJB for administrative purposes
  59          */
  60         @EJB (lookup = "java:global/jjobs-ejb/department!org.mxchange.jcontactsbusiness.model.department.DepartmentSessionBeanRemote")
  61         private DepartmentSessionBeanRemote departmentBean;
  62
  63         /**
  64          * A list of all departments (globally)
  65          */
  66         @Inject
  67         @NamedCache (cacheName = "departmentCache")
  68         private transient Cache<Long, Department> departmentCache;
  69
  70         /**
  71          * A list of filtered departments
  72          */
  73         private List<Department> filteredDepartments;
  74
  75         /**
  76          * Currently selected department
  77          */
  78         private Department selectedDepartment;
  79
  80         /**
  81          * Default constructor
  82          */
  83         public JobsDepartmentListWebViewBean () {
  84                 // Call super constructor
  85                 super();
  86
  87                 // Init list
  88                 this.allDepartments = new LinkedList<>();
  89         }
  90
  91         /**
  92          * Observes events being fired when a department has been added.
  93          * <p>
  94          * @param event Event being fired
  95          * <p>
  96          * @throws NullPointerException If the parameter or it's carried instance is
  97          * null
  98          * @throws IllegalArgumentException If the branchId is zero or lower
  99          */
 100         public void afterDepartmentAddedEvent (@Observes final ObservableDepartmentAddedEvent event) {
 101                 // Validate parameter
 102                 if (null == event) {
 103                         // Throw NPE
 104                         throw new NullPointerException("event is null"); //NOI18N
 105                 } else if (event.getDepartment() == null) {
 106                         // Throw NPE again
 107                         throw new NullPointerException("event.department is null"); //NOI18N
 108                 } else if (event.getDepartment().getDepartmentId() == null) {
 109                         // Throw it again
 110                         throw new NullPointerException("event.department.branchId is null"); //NOI18N
 111                 } else if (event.getDepartment().getDepartmentId() < 1) {
 112                         // Throw IAE
 113                         throw new IllegalArgumentException(MessageFormat.format("event.department.branchId={0} is not valid", event.getDepartment().getDepartmentId())); //NOI18N
 114                 }
 115
 116                 // Add instance to cache
 117                 this.departmentCache.put(event.getDepartment().getDepartmentId(), event.getDepartment());
 118                 this.getAllDepartments().add(event.getDepartment());
 119         }
 120
 121         @Override
 122         public Department findDepartmentById (final Long departmentId) throws DepartmentNotFoundException {
 123                 // Validate parameter
 124                 if (null == departmentId) {
 125                         // Throw NPE
 126                         throw new NullPointerException("departmentId is null"); //NOI18N
 127                 } else if (departmentId < 1) {
 128                         // Throw IAE
 129                         throw new IllegalArgumentException("departmentId=" + departmentId + " is invalid"); //NOI18N
 130                 } else if (!this.departmentCache.containsKey(departmentId)) {
 131                         // Not found
 132                         throw new DepartmentNotFoundException(departmentId);
 133                 }
 134
 135                 // Get it from cache
 136                 final Department department = this.departmentCache.get(departmentId);
 137
 138                 // Return it
 139                 return department;
 140         }
 141
 142         /**
 143          * Returns a list of all departments
 144          * <p>
 145          * @return A list of all departments
 146          */
 147         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 148         public List<Department> getAllDepartments () {
 149                 return this.allDepartments;
 150         }
 151
 152         /**
 153          * Getter for a list of filtered departments
 154          * <p>
 155          * @return Filtered departments
 156          */
 157         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 158         public List<Department> getFilteredDepartments () {
 159                 return this.filteredDepartments;
 160         }
 161
 162         /**
 163          * Setter for a list of filtered departments
 164          * <p>
 165          * @param filteredDepartments Filtered departments
 166          */
 167         @SuppressWarnings ("AssignmentToCollectionOrArrayFieldFromParameter")
 168         public void setFilteredDepartments (final List<Department> filteredDepartments) {
 169                 this.filteredDepartments = filteredDepartments;
 170         }
 171
 172         /**
 173          * Getter for selected department
 174          * <p>
 175          * @return Selected department
 176          */
 177         public Department getSelectedDepartment () {
 178                 return this.selectedDepartment;
 179         }
 180
 181         /**
 182          * Setter for selected department
 183          * <p>
 184          * @param selectedDepartment Selected department
 185          */
 186         public void setSelectedDepartment (final Department selectedDepartment) {
 187                 this.selectedDepartment = selectedDepartment;
 188         }
 189
 190         /**
 191          * Initializer method
 192          */
 193         @PostConstruct
 194         public void initializeList () {
 195                 // Is cache there?
 196                 if (!this.departmentCache.iterator().hasNext()) {
 197                         // Add all
 198                         for (final Department department : this.departmentBean.allDepartments()) {
 199                                 // Add it to cache
 200                                 this.departmentCache.put(department.getDepartmentId(), department);
 201                         }
 202                 }
 203
 204                 // Is the list empty, but filled cache?
 205                 if (this.getAllDepartments().isEmpty() && this.departmentCache.iterator().hasNext()) {
 206                         // Build up list
 207                         for (final Cache.Entry<Long, Department> currentEntry : this.departmentCache) {
 208                                 // Add to list
 209                                 this.getAllDepartments().add(currentEntry.getValue());
 210                         }
 211
 212                         // Sort list
 213                         this.getAllDepartments().sort(new Comparator<Department>() {
 214                                 @Override
 215                                 public int compare (final Department department1, final Department department2) {
 216                                         return department1.getDepartmentId() > department2.getDepartmentId() ? 1 : department1.getDepartmentId() < department2.getDepartmentId() ? -1 : 0;
 217                                 }
 218                         });
 219                 }
 220         }
 221
 222         @Override
 223         public boolean isDepartmentAlreadyAdded (final Department department) {
 224                 // Default is not found
 225                 boolean isFound = false;
 226
 227                 // Now check each entry
 228                 for (final Department currentDepartment : this.getAllDepartments()) {
 229                         // Is same address?
 230                         if (Departments.isSameDepartment(currentDepartment, department)) {
 231                                 // Found one
 232                                 isFound = true;
 233                                 break;
 234                         }
 235                 }
 236
 237                 // Return flag
 238                 return isFound;
 239         }
 240
 241 }