src/java/org/mxchange/pizzaapplication/converter/country/PizzaCountryConverter.java

   1 /*
   2  * Copyright (C) 2016 - 2020 Free Software Foundation
   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.pizzaapplication.converter.country;
  18
  19 import java.util.List;
  20 import java.util.Objects;
  21 import javax.faces.application.FacesMessage;
  22 import javax.faces.component.UIComponent;
  23 import javax.faces.context.FacesContext;
  24 import javax.faces.convert.Converter;
  25 import javax.faces.convert.ConverterException;
  26 import javax.faces.convert.FacesConverter;
  27 import javax.faces.validator.ValidatorException;
  28 import javax.naming.Context;
  29 import javax.naming.InitialContext;
  30 import javax.naming.NamingException;
  31 import org.mxchange.jcountry.model.data.Country;
  32 import org.mxchange.jcountry.model.data.CountrySingletonBeanRemote;
  33
  34 /**
  35  * Converter for country instance
  36  * <p>
  37  * @author Roland Häder<roland@mxchange.org>
  38  */
  39 @FacesConverter ("CountryConverter")
  40 public class PizzaCountryConverter implements Converter<Country> {
  41
  42         /**
  43          * Country bean
  44          */
  45         private static CountrySingletonBeanRemote COUNTRY_BEAN;
  46
  47         @Override
  48         public Country getAsObject (final FacesContext context, final UIComponent component, final String submittedValue) {
  49                 // Is the instance there?
  50                 if (COUNTRY_BEAN == null) {
  51                         try {
  52                                 // Not yet, attempt lookup
  53                                 final Context initial = new InitialContext();
  54
  55                                 // Lookup EJB
  56                                 COUNTRY_BEAN = (CountrySingletonBeanRemote) initial.lookup("java:global/pizzaservice-ejb/country!org.mxchange.jcountry.model.data.CountrySingletonBeanRemote");
  57                         } catch (final NamingException ex) {
  58                                 // Throw it again
  59                                 throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Cannot lookup EJB", ex.getMessage()), ex);
  60                         }
  61                 }
  62
  63                 // Is the value null or empty?
  64                 if ((null == submittedValue) || (submittedValue.trim().isEmpty())) {
  65                         // Warning message
  66                         // @TODO Not working with JNDI (no remote interface) this.loggerBeanLocal.logWarning(MessageFormat.format("{0}.getAsObject(): submittedValue is null or empty - EXIT!", this.getClass().getSimpleName())); //NOI18N
  67
  68                         // Return null
  69                         return null;
  70                 }
  71
  72                 // Get full list
  73                 final List<Country> countryList = COUNTRY_BEAN.allCountries();
  74
  75                 // Init value
  76                 Country country = null;
  77
  78                 // Try this better
  79                 try {
  80                         // Convert it to long
  81                         final Long countryId = Long.parseLong(submittedValue);
  82
  83                         // Category id should not be below 1
  84                         assert (countryId > 0) : "countryId is smaller than one: " + countryId; //NOI18N
  85
  86                         // Try to find it
  87                         for (final Country cntry : countryList) {
  88                                 // Is the id the same? (null-safe)
  89                                 if (Objects.equals(cntry.getCountryId(), countryId)) {
  90                                         // Found it
  91                                         country = cntry;
  92                                         break;
  93                                 }
  94                         }
  95                 } catch (final NumberFormatException ex) {
  96                         // Throw again
  97                         throw new ConverterException(ex);
  98                 }
  99
 100                 // Return it
 101                 return country;
 102         }
 103
 104         @Override
 105         public String getAsString (final FacesContext context, final UIComponent component, final Country value) {
 106                 // Is the object null?
 107                 if ((null == value) || (String.valueOf(value).isEmpty())) {
 108                         // Is null
 109                         return ""; //NOI18N
 110                 }
 111
 112                 // Return id number
 113                 return String.valueOf(value.getCountryId());
 114         }
 115
 116 }