src/java/org/mxchange/jfinancials/beans/business/employee/list/FinancialsEmployeeListWebViewBean.java

   1 /*
   2  * Copyright (C) 2017 - 2022 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.business.employee.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.jcontactsbusiness.events.employee.added.ObservableEmployeeAddedEvent;
  33 import org.mxchange.jcontactsbusiness.exceptions.employee.EmployeeNotFoundException;
  34 import org.mxchange.jcontactsbusiness.model.employee.Employable;
  35 import org.mxchange.jcontactsbusiness.model.employee.EmployeeSessionBeanRemote;
  36 import org.mxchange.jfinancials.beans.BaseFinancialsBean;
  37
  38 /**
  39  * A view-scoped bean for listing purposes for e.g. administrative employee
  40  * purposes.
  41  * <p>
  42  * @author Roland Häder<roland@mxchange.org>
  43  */
  44 @Named ("employeeListController")
  45 @ViewScoped
  46 public class FinancialsEmployeeListWebViewBean extends BaseFinancialsBean implements FinancialsEmployeeListWebViewController {
  47
  48         /**
  49          * Serial number
  50          */
  51         private static final long serialVersionUID = 12_886_968_547_362L;
  52
  53         /**
  54          * List of all employees
  55          */
  56         private final List<Employable> allEmployees;
  57
  58         /**
  59          * EJB for general company employee purposes
  60          */
  61         @EJB (lookup = "java:global/jfinancials-ejb/employee!org.mxchange.jcontactsbusiness.model.employee.EmployeeSessionBeanRemote")
  62         private EmployeeSessionBeanRemote employeeBean;
  63
  64         /**
  65          * List of all company employees
  66          */
  67         @Inject
  68         @NamedCache (cacheName = "companyEmployeeCache")
  69         private transient Cache<Long, Employable> employeeCache;
  70
  71         /**
  72          * A list of filtered employees
  73          */
  74         private List<Employable> filteredEmployees;
  75
  76         /**
  77          * Currently selected employee
  78          */
  79         private Employable selectedEmployee;
  80
  81         /**
  82          * Default constructor
  83          */
  84         public FinancialsEmployeeListWebViewBean () {
  85                 // Call super constructor
  86                 super();
  87
  88                 // Init list
  89                 this.allEmployees = new LinkedList<>();
  90         }
  91
  92         /**
  93          * Observes events being fired when an employee has been added
  94          * <p>
  95          * @param event Event being fired
  96          */
  97         public void afterEmployeeAddedEvent (@Observes final ObservableEmployeeAddedEvent event) {
  98                 // Validate parameter
  99                 if (null == event) {
 100                         // Throw NPE
 101                         throw new NullPointerException("event is null"); //NOI18N
 102                 } else if (event.getEmployee() == null) {
 103                         // Throw it again
 104                         throw new NullPointerException("event.employee is null"); //NOI18N
 105                 } else if (event.getEmployee().getEmployeeId() == null) {
 106                         // Throw it again
 107                         throw new NullPointerException("event.employee.employeeId is null"); //NOI18N
 108                 } else if (event.getEmployee().getEmployeeId() < 1) {
 109                         // Throw IAE
 110                         throw new IllegalArgumentException(MessageFormat.format("event.employee.employeeId={0} is invalid", event.getEmployee().getEmployeeId())); //NOI18N
 111                 }
 112
 113                 // Add employee to cache and list
 114                 this.employeeCache.put(event.getEmployee().getEmployeeId(), event.getEmployee());
 115                 this.getAllEmployees().add(event.getEmployee());
 116         }
 117
 118         @Override
 119         public Employable findEmployeeById (final Long employeeId) throws EmployeeNotFoundException {
 120                 // Validate parameter
 121                 if (null == employeeId) {
 122                         // Throw NPE
 123                         throw new NullPointerException("employeeId is null"); //NOI18N
 124                 } else if (employeeId < 1) {
 125                         // Throw IAE
 126                         throw new IllegalArgumentException(MessageFormat.format("employeeId={0} is invalid", employeeId)); //NOI18N
 127                 } else if (!this.employeeCache.containsKey(employeeId)) {
 128                         // Not found
 129                         throw new EmployeeNotFoundException(employeeId);
 130                 }
 131
 132                 // Get it from cache
 133                 final Employable employee = this.employeeCache.get(employeeId);
 134
 135                 // Return it
 136                 return employee;
 137         }
 138
 139         @Override
 140         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 141         public List<Employable> getAllEmployees () {
 142                 return this.allEmployees;
 143         }
 144
 145         /**
 146          * Getter for filtered list of employees
 147          * <p>
 148          * @return Filtered list of employees
 149          */
 150         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 151         public List<Employable> getFilteredEmployees () {
 152                 return this.filteredEmployees;
 153         }
 154
 155         /**
 156          * Getter for filtered list of employees
 157          * <p>
 158          * @param filteredEmployees Filtered list of employees
 159          */
 160         @SuppressWarnings ("AssignmentToCollectionOrArrayFieldFromParameter")
 161         public void setFilteredEmployees (final List<Employable> filteredEmployees) {
 162                 this.filteredEmployees = filteredEmployees;
 163         }
 164
 165         /**
 166          * Getter for currently selected employee
 167          * <p>
 168          * @return Currently selected employee
 169          */
 170         public Employable getSelectedEmployee () {
 171                 return this.selectedEmployee;
 172         }
 173
 174         /**
 175          * Setter for currently selected employee
 176          * <p>
 177          * @param selectedEmployee Currently selected employee
 178          */
 179         public void setSelectedEmployee (final Employable selectedEmployee) {
 180                 this.selectedEmployee = selectedEmployee;
 181         }
 182
 183         /**
 184          * Initialization method
 185          */
 186         @PostConstruct
 187         public void initializeList () {
 188                 // Is cache there?
 189                 if (!this.employeeCache.iterator().hasNext()) {
 190                         // Add all
 191                         for (final Employable employee : this.employeeBean.fetchAllEmployees()) {
 192                                 // Add it to cache
 193                                 this.employeeCache.put(employee.getEmployeeId(), employee);
 194                         }
 195                 }
 196
 197                 // Is cache filled and list is empty
 198                 if ((this.employeeCache.iterator().hasNext()) && (this.getAllEmployees().isEmpty())) {
 199                         // Build up list
 200                         for (final Cache.Entry<Long, Employable> currentEntry : this.employeeCache) {
 201                                 // Add to list
 202                                 this.getAllEmployees().add(currentEntry.getValue());
 203                         }
 204
 205                         // Sort list
 206                         this.getAllEmployees().sort(new Comparator<Employable>() {
 207                                 @Override
 208                                 public int compare (final Employable employee1, final Employable employee2) {
 209                                         return employee1.getEmployeeId() > employee2.getEmployeeId() ? 1 : employee1.getEmployeeId() < employee2.getEmployeeId() ? -1 : 0;
 210                                 }
 211                         });
 212                 }
 213         }
 214
 215         @Override
 216         public Boolean isEmailAddressRegistered (final String emailAddress) {
 217                 // Validate parameter
 218                 if (null == emailAddress) {
 219                         // Throw NPE
 220                         throw new NullPointerException("emailAddress is null"); //NOI18N
 221                 } else if (emailAddress.isEmpty()) {
 222                         // Throw IAE
 223                         throw new IllegalArgumentException("emailAddress is empty"); //NOI18N
 224                 }
 225
 226                 // Default is not found
 227                 boolean isFound = false;
 228
 229                 // Check all entries
 230                 for (final Employable basicData : this.getAllEmployees()) {
 231                         // Is email address used?
 232                         if (Objects.equals(basicData.getEmployeeEmailAddress(), emailAddress)) {
 233                                 // Found it
 234                                 isFound = true;
 235                                 break;
 236                         }
 237                 }
 238
 239                 // Return flag
 240                 return isFound;
 241         }
 242
 243 }