src/java/org/mxchange/jjobs/converter/user/UserConverter.java

   1 /*
   2  * Copyright (C) 2016 Roland Haeder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (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 General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.jjobs.converter.user;
  18
  19 import java.text.MessageFormat;
  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.inject.Inject;
  26 import javax.naming.Context;
  27 import javax.naming.InitialContext;
  28 import javax.naming.NamingException;
  29 import org.mxchange.jcoreeelogger.beans.local.logger.Log;
  30 import org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal;
  31 import org.mxchange.jjobs.beans.user.UserWebSessionController;
  32 import org.mxchange.jusercore.exceptions.UserNotFoundException;
  33 import org.mxchange.jusercore.model.user.User;
  34
  35 /**
  36  * Converter for user id <-> valid user instance
  37  * <p>
  38  * @author Roland Haeder
  39  */
  40 @FacesConverter (value = "UserConverter")
  41 public class UserConverter implements Converter {
  42
  43         /**
  44          * Logger instance
  45          */
  46         @Log
  47         private LoggerBeanLocal loggerBeanLocal;
  48
  49         /**
  50          * User bean
  51          */
  52         @Inject
  53         private UserWebSessionController userController;
  54
  55         /**
  56          * Constructor of this converter
  57          */
  58         public UserConverter () {
  59                 // Try to get it
  60                 try {
  61                         // Get initial context
  62                         Context context = new InitialContext();
  63
  64                         // Lookup logger
  65                         this.loggerBeanLocal = (LoggerBeanLocal) context.lookup("java:global/jcore-logger-ejb/logger!org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal"); //NOI18N
  66
  67                         // ... and user controller
  68                         this.userController = (UserWebSessionController) context.lookup("java:global/juser-ejb/user!org.mxchange.jusercore.model.user.UserSessionBeanRemote"); //NOI18N
  69                 } catch (final NamingException ex) {
  70                         // Continue to throw it
  71                         throw new RuntimeException("context.lookup() failed.", ex); //NOI18N
  72                 }
  73         }
  74
  75         @Override
  76         public Object getAsObject (final FacesContext context, final UIComponent component, final String submittedValue) {
  77                 // Trace message
  78                 this.loggerBeanLocal.logTrace(MessageFormat.format("getAsObject: contect={0},component={1},submittedValue={2} - CALLED!", context, component, submittedValue)); //NOI18N
  79
  80                 // Is the value null or empty?
  81                 if ((null == submittedValue) || (submittedValue.trim().isEmpty())) {
  82                         // Return null
  83                         return null;
  84                 }
  85
  86                 // Init instance
  87                 User user = null;
  88
  89                 try {
  90                         // Try to parse the value as long
  91                         Long userId = Long.valueOf(submittedValue);
  92
  93                         // Debug message
  94                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: userId{0}", userId));
  95
  96                         // Try to get user instance from it
  97                         user = this.userController.lookupUserById(userId);
  98
  99                         // Debug message
 100                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: user={0}", user));
 101                 } catch (final NumberFormatException ex) {
 102                         // Throw again
 103                         throw new ConverterException(ex);
 104                 } catch (final UserNotFoundException ex) {
 105                         // Debug message
 106                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: Exception: {0} - Returning null ...", ex));
 107
 108                         // Return null
 109                         return null;
 110                 }
 111
 112                 // Trace message
 113                 this.loggerBeanLocal.logTrace(MessageFormat.format("getAsObject: user={0} - EXIT!", user));
 114
 115                 // Return it
 116                 return user;
 117         }
 118
 119         @Override
 120         public String getAsString (final FacesContext context, final UIComponent component, final Object value) {
 121                 // Is the object null?
 122                 if ((null == value) || ((String.valueOf(value)).isEmpty())) {
 123                         // Is null
 124                         return ""; //NOI18N
 125                 } else if (!(value instanceof User)) {
 126                         // Not same interface
 127                         throw new IllegalArgumentException(MessageFormat.format("value {0} does not implement User.", value)); //NOI18N
 128                 }
 129
 130                 // Return category id
 131                 return String.valueOf(((User) value).getUserId());
 132         }
 133 }