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.annotation.PostConstruct;
  21 import javax.faces.component.UIComponent;
  22 import javax.faces.context.FacesContext;
  23 import javax.faces.convert.Converter;
  24 import javax.faces.convert.ConverterException;
  25 import javax.faces.convert.FacesConverter;
  26 import javax.inject.Inject;
  27 import javax.naming.Context;
  28 import javax.naming.InitialContext;
  29 import javax.naming.NamingException;
  30 import org.mxchange.addressbook.beans.user.UserWebSessionController;
  31 import org.mxchange.jcoreeelogger.beans.local.logger.Log;
  32 import org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal;
  33 import org.mxchange.jusercore.exceptions.UserNotFoundException;
  34 import org.mxchange.jusercore.model.user.User;
  35
  36 /**
  37  * Converter for user id <-> valid user instance
  38  * <p>
  39  * @author Roland Haeder
  40  */
  41 @FacesConverter (value = "UserConverter")
  42 public class UserConverter implements Converter {
  43
  44         /**
  45          * Logger instance
  46          */
  47         @Log
  48         private LoggerBeanLocal loggerBeanLocal;
  49
  50         /**
  51          * User bean
  52          */
  53         @Inject
  54         private UserWebSessionController userController;
  55
  56         @Override
  57         public Object getAsObject (final FacesContext context, final UIComponent component, final String submittedValue) {
  58                 // Trace message
  59                 this.loggerBeanLocal.logTrace(MessageFormat.format("getAsObject: contect={0},component={1},submittedValue={2} - CALLED!", context, component, submittedValue)); //NOI18N
  60
  61                 // Is the value null or empty?
  62                 if ((null == submittedValue) || (submittedValue.trim().isEmpty())) {
  63                         // Return null
  64                         return null;
  65                 }
  66
  67                 // Init instance
  68                 User user = null;
  69
  70                 try {
  71                         // Try to parse the value as long
  72                         Long userId = Long.valueOf(submittedValue);
  73
  74                         // Debug message
  75                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: userId{0}", userId));
  76
  77                         // Try to get user instance from it
  78                         user = this.userController.lookupUserById(userId);
  79
  80                         // Debug message
  81                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: user={0}", user));
  82                 } catch (final NumberFormatException ex) {
  83                         // Throw again
  84                         throw new ConverterException(ex);
  85                 } catch (final UserNotFoundException ex) {
  86                         // Debug message
  87                         this.loggerBeanLocal.logDebug(MessageFormat.format("getAsObject: Exception: {0} - Returning null ...", ex));
  88
  89                         // Return null
  90                         return null;
  91                 }
  92
  93                 // Trace message
  94                 this.loggerBeanLocal.logTrace(MessageFormat.format("getAsObject: user={0} - EXIT!", user));
  95
  96                 // Return it
  97                 return user;
  98         }
  99
 100         @Override
 101         public String getAsString (final FacesContext context, final UIComponent component, final Object value) {
 102                 // Is the object null?
 103                 if ((null == value) || ((String.valueOf(value)).isEmpty())) {
 104                         // Is null
 105                         return ""; //NOI18N
 106                 } else if (!(value instanceof User)) {
 107                         // Not same interface
 108                         throw new IllegalArgumentException(MessageFormat.format("value {0} does not implement User.", value)); //NOI18N
 109                 }
 110
 111                 // Return category id
 112                 return String.valueOf(((User) value).getUserId());
 113         }
 114
 115         /**
 116          * Initialization of this converter
 117          */
 118         @PostConstruct
 119         public void init () {
 120                 // Try to get it
 121                 try {
 122                         // Get initial context
 123                         Context context = new InitialContext();
 124
 125                         // Lookup logger
 126                         this.loggerBeanLocal = (LoggerBeanLocal) context.lookup("java:global/jcore-logger-ejb/logger!org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal"); //NOI18N
 127                 } catch (final NamingException ex) {
 128                         // Continue to throw it
 129                         throw new RuntimeException("context.lookup() failed.", ex); //NOI18N
 130                 }
 131         }
 132 }