src/java/org/mxchange/jjobs/validator/user/JobsUserIdValidator.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 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.validator.user;
  18
  19 import java.text.MessageFormat;
  20 import javax.faces.application.FacesMessage;
  21 import javax.faces.component.UIComponent;
  22 import javax.faces.context.FacesContext;
  23 import javax.faces.convert.ConverterException;
  24 import javax.faces.validator.FacesValidator;
  25 import javax.faces.validator.Validator;
  26 import javax.faces.validator.ValidatorException;
  27 import javax.naming.Context;
  28 import javax.naming.InitialContext;
  29 import javax.naming.NamingException;
  30 import org.mxchange.jcoreee.validator.number.BaseLongValidator;
  31 import org.mxchange.jusercore.model.user.UserSessionBeanRemote;
  32
  33 /**
  34  * A validator for user ids
  35  * <p>
  36  * @author Roland Häder<roland@mxchange.org>
  37  */
  38 @FacesValidator ("UserIdValidator")
  39 public class JobsUserIdValidator extends BaseLongValidator implements Validator {
  40
  41         /**
  42          * Serial number
  43          */
  44         private static final long serialVersionUID = 12_869_569_314_764_690L;
  45
  46         /**
  47          * Remote bean
  48          */
  49         private UserSessionBeanRemote userBean;
  50
  51         /**
  52          * Initialization of this converter
  53          */
  54         public JobsUserIdValidator () {
  55         }
  56
  57         @Override
  58         public void validate (final FacesContext context, final UIComponent component, final Object value) throws ValidatorException {
  59                 // All accepted, required fields
  60                 String[] requiredFields = {"userId"}; //NOI18N
  61
  62                 // Pre-validation (example: not null, not a string, empty string ...)
  63                 super.preValidate(context, component, value, requiredFields, false);
  64
  65                 // Cast value
  66                 Long userId = (Long) value;
  67
  68                 synchronized (this) {
  69                         // Is the EJB instanciated?
  70                         if (null == this.userBean) {
  71                                 // Try to get it
  72                                 try {
  73                                         // Get initial context
  74                                         Context initialContext = new InitialContext();
  75
  76                                         // ... and user controller
  77                                         this.userBean = (UserSessionBeanRemote) initialContext.lookup("java:global/jjobs-ejb/user!org.mxchange.jusercore.model.user.UserSessionBeanRemote"); //NOI18N
  78                                 } catch (final NamingException ex) {
  79                                         // Continue to throw it
  80                                         throw new ConverterException(MessageFormat.format("initialContext.lookup() failed: {0}", ex.getMessage()), ex); //NOI18N
  81                                 }
  82                         }
  83                 }
  84
  85                 // Define variable
  86                 Boolean ifUserExists = this.userBean.ifUserIdExists(userId);
  87
  88                 // Is the user id valid?
  89                 if (!ifUserExists) {
  90                         // Is not valid
  91                         throw new ValidatorException(new FacesMessage(MessageFormat.format("No user found with id {0}. Please check your link.", userId))); //NOI18N
  92                 }
  93         }
  94
  95 }