src/java/org/mxchange/addressbook/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.addressbook.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.naming.Context;
  26 import javax.naming.InitialContext;
  27 import javax.naming.NamingException;
  28 import org.mxchange.addressbook.beans.user.UserWebSessionController;
  29 import org.mxchange.jcoreeelogger.beans.local.logger.Log;
  30 import org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal;
  31 import org.mxchange.jusercore.exceptions.UserNotFoundException;
  32 import org.mxchange.jusercore.model.user.User;
  33
  34 /**
  35  * Converter for user id <-> valid user instance
  36  * <p>
  37  * @author Roland Haeder
  38  */
  39 @FacesConverter (value = "UserConverter")
  40 public class UserConverter implements Converter {
  41
  42         /**
  43          * Logger instance
  44          */
  45         @Log
  46         private LoggerBeanLocal loggerBeanLocal;
  47
  48         /**
  49          * User bean
  50          */
  51         private UserWebSessionController userController;
  52
  53         /**
  54          * Initialization of this converter
  55          */
  56         public UserConverter () {
  57                 // Try to get it
  58                 try {
  59                         // Get initial context
  60                         Context context = new InitialContext();
  61
  62                         // Lookup logger
  63                         this.loggerBeanLocal = (LoggerBeanLocal) context.lookup("java:global/jcore-logger-ejb/logger!org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal"); //NOI18N
  64
  65                         // ... and user controller
  66                         this.userController = (UserWebSessionController) context.lookup("java:global/juser-ejb/user!org.mxchange.jusercore.model.user.UserSessionBeanRemote"); //NOI18N
  67                 } catch (final NamingException ex) {
  68                         // Continue to throw it
  69                         throw new RuntimeException("context.lookup() failed.", ex); //NOI18N
  70                 }
  71         }
  72
  73         @Override
  74         public Object getAsObject (final FacesContext context, final UIComponent component, final String submittedValue) {
  75                 // Trace message
  76                 this.loggerBeanLocal.logTrace(MessageFormat.format("getAsObject: contect={0},component={1},submittedValue={2} - CALLED!", context, component, submittedValue)); //NOI18N
  77
  78                 // Is the value null or empty?
  79                 if ((null == submittedValue) || (submittedValue.trim().isEmpty())) {
  80                         // Return null
  81                         return null;
  82                 }
  83
  84                 // Init instance
  85                 User user = null;
  86
  87                 try {
  88                         // Try to parse the value as long
  89                         Long userId = Long.valueOf(submittedValue);
  90
  91                         // Debug message
  92                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: userId{0}", userId));
  93
  94                         // Try to get user instance from it
  95                         user = this.userController.lookupUserById(userId);
  96
  97                         // Debug message
  98                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: user={0}", user));
  99                 } catch (final NumberFormatException ex) {
 100                         // Throw again
 101                         throw new ConverterException(ex);
 102                 } catch (final UserNotFoundException ex) {
 103                         // Debug message
 104                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: Exception: {0} - Returning null ...", ex));
 105
 106                         // Return null
 107                         return null;
 108                 }
 109
 110                 // Trace message
 111                 this.loggerBeanLocal.logTrace(MessageFormat.format("getAsObject: user={0} - EXIT!", user));
 112
 113                 // Return it
 114                 return user;
 115         }
 116
 117         @Override
 118         public String getAsString (final FacesContext context, final UIComponent component, final Object value) {
 119                 // Is the object null?
 120                 if ((null == value) || ((String.valueOf(value)).isEmpty())) {
 121                         // Is null
 122                         return ""; //NOI18N
 123                 } else if (!(value instanceof User)) {
 124                         // Not same interface
 125                         throw new IllegalArgumentException(MessageFormat.format("value {0} does not implement User.", value)); //NOI18N
 126                 }
 127
 128                 // Return category id
 129                 return String.valueOf(((User) value).getUserId());
 130         }
 131 }