src/java/org/mxchange/jjobs/validator/emailaddress/JobsEmailAddressValidator.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 Affero General Public License as
   6  * published by the Free Software Foundation, either version 3 of the
   7  * License, or (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 Affero General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Affero General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.jjobs.validator.emailaddress;
  18
  19 import java.text.MessageFormat;
  20 import java.util.List;
  21 import java.util.regex.Pattern;
  22 import javax.faces.application.FacesMessage;
  23 import javax.faces.component.UIComponent;
  24 import javax.faces.context.FacesContext;
  25 import javax.faces.convert.ConverterException;
  26 import javax.faces.validator.FacesValidator;
  27 import javax.faces.validator.Validator;
  28 import javax.faces.validator.ValidatorException;
  29 import javax.naming.Context;
  30 import javax.naming.InitialContext;
  31 import javax.naming.NamingException;
  32 import org.mxchange.jcontacts.contact.ContactSessionBeanRemote;
  33 import org.mxchange.jcoreee.validator.string.BaseStringValidator;
  34
  35 /**
  36  * A validator for email address validation
  37  * <p>
  38  * @author Roland Häder<roland@mxchange.org>
  39  */
  40 @FacesValidator ("EmailAddressValidator")
  41 public class JobsEmailAddressValidator extends BaseStringValidator implements Validator {
  42
  43         /**
  44          * Serial number
  45          */
  46         private static final long serialVersionUID = 187_536_745_607_192L;
  47
  48         /**
  49          * Contact session-scoped bean
  50          */
  51         private ContactSessionBeanRemote contactBean;
  52
  53         /**
  54          * Cached list of all email addresses
  55          */
  56         private List<String> emailAddresses;
  57
  58         /**
  59          * Default constructor
  60          */
  61         public JobsEmailAddressValidator () {
  62         }
  63
  64         @Override
  65         public void validate (final FacesContext context, final UIComponent component, final Object value) throws ValidatorException {
  66                 // The required field
  67                 String[] requiredFields = {"emailAddress", "emailAddressRepeat", "resendEmailAddress"}; //NOI18N
  68
  69                 // Pre-validation (example: not null, not a string, empty string ...)
  70                 super.preValidate(context, component, value, requiredFields, false);
  71
  72                 // Get string from object ... ;-)
  73                 // @TODO Add IDN support (GNU lib?) Search for emailAddressRepeat
  74                 String emailAddress = String.valueOf(value);
  75
  76                 // Checks if the email address matches a regex ("low-level" check)
  77                 // @TODO Should also be done by <f:validatorRegex />)
  78                 boolean matches = Pattern.matches("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$", emailAddress); //NOI18N
  79
  80                 // Is the email address valid?
  81                 if (!matches) {
  82                         // Generate message
  83                         String message = MessageFormat.format("Email address {0} does not match regular expression.", emailAddress); //NOI18N
  84
  85                         // Not matching
  86                         throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, message, message));
  87                 }
  88
  89                 synchronized (this) {
  90                         // Is the EJB instanciated?
  91                         if (null == this.contactBean) {
  92                                 // Try it
  93                                 try {
  94                                         // Get initial context
  95                                         Context initialContext = new InitialContext();
  96
  97                                         // Try to lookup
  98                                         this.contactBean = (ContactSessionBeanRemote) initialContext.lookup("java:global/jjobs-ejb/contact!org.mxchange.jcontacts.contact.ContactSessionBeanRemote"); //NOI18N
  99
 100                                         // Get whole list of email addresses
 101                                         this.emailAddresses = this.contactBean.getEmailAddressList();
 102                                 } catch (final NamingException ex) {
 103                                         // Continue to throw it
 104                                         throw new ConverterException(MessageFormat.format("initialContext.lookup() failed: {0}", ex.getMessage()), ex); //NOI18N
 105                                 }
 106                         }
 107                 }
 108
 109                 // Get client id (aka form id)
 110                 String clientId = component.getClientId();
 111
 112                 // Is the email address already registered?
 113                 if ((!clientId.endsWith("resendEmailAddress")) && (this.emailAddresses.contains(emailAddress))) { //NOI18N
 114                         // Generate message
 115                         String message = MessageFormat.format("Email address {0} is already registered.", emailAddress); //NOI18N
 116
 117                         // No, then abort here
 118                         throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_INFO, message, message));
 119                 } else if ((clientId.endsWith("resendEmailAddress")) && (!this.emailAddresses.contains(emailAddress))) { //NOI18N
 120                         // Generate message
 121                         String message = MessageFormat.format("Email address {0} is not registered.", emailAddress); //NOI18N
 122
 123                         // No, then abort here
 124                         throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_INFO, message, message));
 125                 }
 126         }
 127
 128 }