src/org/mxchange/addressbook/validator/user/UserIdValidator.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.validator.user;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Set;
  21 import java.util.TreeSet;
  22 import javax.ejb.EJB;
  23 import javax.enterprise.event.Observes;
  24 import javax.faces.application.FacesMessage;
  25 import javax.faces.component.UIComponent;
  26 import javax.faces.context.FacesContext;
  27 import javax.faces.validator.FacesValidator;
  28 import javax.faces.validator.Validator;
  29 import javax.faces.validator.ValidatorException;
  30 import org.mxchange.jcoreee.validator.number.BaseLongValidator;
  31 import org.mxchange.jusercore.events.registration.UserRegisteredEvent;
  32 import org.mxchange.jusercore.model.user.User;
  33 import org.mxchange.jusercore.model.user.UserSessionBeanRemote;
  34
  35 /**
  36  * A validator for user ids
  37  * <p>
  38  * @author Roland Haeder
  39  */
  40 @FacesValidator (value = "UserIdValidator")
  41 public class UserIdValidator extends BaseLongValidator implements Validator {
  42
  43         /**
  44          * Cached user status
  45          */
  46         private static final Set<Long> cachedStatus = new TreeSet<>();
  47
  48         /**
  49          * Serial number
  50          */
  51         private static final long serialVersionUID = 12_869_569_314_764_690L;
  52
  53         /**
  54          * Remote bean
  55          */
  56         @EJB (mappedName = "ejb/stateless-user")
  57         private UserSessionBeanRemote userBean;
  58
  59         /**
  60          * Event fired when the user registration is complete
  61          * <p>
  62          * @param event User registration event
  63          */
  64         public void afterRegistrationEvent (final @Observes UserRegisteredEvent event) {
  65                 // Trace message
  66                 System.out.println(MessageFormat.format("UserIdValidator:afterRegistrationEvent: event={0} - CALLED!", event)); //NOI18N
  67
  68                 // event should not be null
  69                 if (null == event) {
  70                         // Throw NPE
  71                         throw new NullPointerException("event is null"); //NOI18N
  72                 } else if (event.getUser() == null) {
  73                         // Throw NPE again
  74                         throw new NullPointerException("event.user is null"); //NOI18N
  75                 } else if (event.getUser().getUserId() == null) {
  76                         // userId is null
  77                         throw new NullPointerException("event.user.userId is null"); //NOI18N
  78                 } else if (event.getUser().getUserId() < 1) {
  79                         // Not avalid id
  80                         throw new IllegalArgumentException(MessageFormat.format("userId of user={0} is not valid: {1}", event.getUser(), event.getUser().getUserId())); //NOI18N
  81                 }
  82
  83                 // Get user instance
  84                 User registeredUser = event.getUser();
  85
  86                 // Debug message
  87                 System.out.println(MessageFormat.format("UserIdValidator:afterRegistrationEvent: registeredUser={0}", registeredUser)); //NOI18N
  88
  89                 // Update cache
  90                 UserIdValidator.cachedStatus.add(registeredUser.getUserId());
  91
  92                 // Trace message
  93                 System.out.println("UserIdValidator:afterRegistrationEvent: EXIT!"); //NOI18N
  94         }
  95
  96         @Override
  97         public void validate (final FacesContext context, final UIComponent component, final Object value) throws ValidatorException {
  98                 // Trace message
  99                 //this.getLogger().logTrace(MessageFormat.format("validate: context={0},component={1},value={2} - CALLED!", context, component, value)); //NOI18N
 100
 101                 // All accepted, required fields
 102                 String[] requiredFileds = {"userId"}; //NOI18N
 103
 104                 // Pre-validation (example: not null, not a string, empty string ...)
 105                 super.preValidate(context, component, value, requiredFileds, false);
 106
 107                 // Cast value
 108                 Long userId = (Long) value;
 109
 110                 // Define variable
 111                 Boolean ifUserExists;
 112
 113                 // Is a map entry there?
 114                 if (UserIdValidator.cachedStatus.contains(userId)) {
 115                         // Get from cache
 116                         ifUserExists = Boolean.TRUE;
 117                 } else {
 118                         // Get status
 119                         ifUserExists = this.userBean.ifUserIdExists(userId);
 120                 }
 121
 122                 // Is the user id valid?
 123                 if (!ifUserExists) {
 124                         // Is not valid
 125                         throw new ValidatorException(new FacesMessage(MessageFormat.format("No user found with id {0}. Please check your link.", userId))); //NOI18N
 126                 }
 127
 128                 // Add to cache if valid
 129                 UserIdValidator.cachedStatus.add(userId);
 130
 131                 // Trace message
 132                 //this.getLogger().logTrace("validate: EXIT!"); //NOI18N
 133         }
 134 }