src/java/org/mxchange/pizzaapplication/converter/user/PizzaUserConverter.java

   1 /*
   2  * Copyright (C) 2016, 2017 Roland Häder
   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.pizzaapplication.converter.user;
  18
  19 import javax.faces.application.FacesMessage;
  20 import javax.faces.component.UIComponent;
  21 import javax.faces.context.FacesContext;
  22 import javax.faces.convert.Converter;
  23 import javax.faces.convert.ConverterException;
  24 import javax.faces.convert.FacesConverter;
  25 import javax.naming.Context;
  26 import javax.naming.InitialContext;
  27 import javax.naming.NamingException;
  28 import org.mxchange.jusercore.exceptions.UserNotFoundException;
  29 import org.mxchange.jusercore.model.user.User;
  30 import org.mxchange.jusercore.model.user.UserSessionBeanRemote;
  31
  32 /**
  33  * Converter for user id <-> valid user instance
  34  * <p>
  35  * @author Roland Häder<roland@mxchange.org>
  36  */
  37 @FacesConverter ("UserConverter")
  38 public class PizzaUserConverter implements Converter<User> {
  39
  40         /**
  41          * User EJB
  42          */
  43         private static UserSessionBeanRemote USER_BEAN;
  44
  45         @Override
  46         public User getAsObject (final FacesContext context, final UIComponent component, final String submittedValue) {
  47                 // Is the instance there?
  48                 if (USER_BEAN == null) {
  49                         try {
  50                                 // Not yet, attempt lookup
  51                                 Context initial = new InitialContext();
  52
  53                                 // Lookup EJB
  54                                 USER_BEAN = (UserSessionBeanRemote) initial.lookup("java:global/jfinancials-ejb/user!org.mxchange.jusercore.model.user.UserSessionBeanRemote");
  55                         } catch (final NamingException ex) {
  56                                 // Throw it again
  57                                 throw new ConverterException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Cannot lookup EJB", ex.getMessage()), ex);
  58                         }
  59                 }
  60
  61                 // Is the value null or empty?
  62                 if ((null == submittedValue) || (submittedValue.trim().isEmpty())) {
  63                         // Warning message
  64                         // @TODO Not working with JNDI (no remote interface) this.loggerBeanLocal.logWarning(MessageFormat.format("{0}.getAsObject(): submittedValue is null or empty - EXIT!", this.getClass().getSimpleName())); //NOI18N
  65
  66                         // Return null
  67                         return null;
  68                 }
  69
  70                 // Init instance
  71                 User user = null;
  72
  73                 try {
  74                         // Try to parse the value as long
  75                         Long userId = Long.valueOf(submittedValue);
  76
  77                         // Try to get user instance from it
  78                         user = USER_BEAN.findUserById(userId);
  79                 } catch (final NumberFormatException ex) {
  80                         // Throw again
  81                         throw new ConverterException(ex);
  82                 } catch (final UserNotFoundException ex) {
  83                         // Debug message
  84                         // @TODO Not working with JNDI (no remote interface) this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: Exception: {0} - Returning null ...", ex)); //NOI18N
  85                 }
  86
  87                 // Return it
  88                 return user;
  89         }
  90
  91         @Override
  92         public String getAsString (final FacesContext context, final UIComponent component, final User value) {
  93                 // Is the object null?
  94                 if ((null == value) || (String.valueOf(value).isEmpty())) {
  95                         // Is null
  96                         return ""; //NOI18N
  97                 }
  98
  99                 // Return id number
 100                 return String.valueOf(value.getUserId());
 101         }
 102
 103 }