src/java/org/mxchange/pizzaapplication/converter/country/PizzaCountryConverter.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.pizzaapplication.converter.country;
  18
  19 import java.text.MessageFormat;
  20 import java.util.List;
  21 import java.util.Objects;
  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.naming.Context;
  28 import javax.naming.InitialContext;
  29 import javax.naming.NamingException;
  30 import org.mxchange.jcountry.data.Country;
  31 import org.mxchange.jcountry.data.CountrySingletonBeanRemote;
  32
  33 /**
  34  * Converter for country instance
  35  * <p>
  36  * @author Roland Häder<roland@mxchange.org>
  37  */
  38 @FacesConverter (value = "CountryConverter")
  39 public class PizzaCountryConverter implements Converter {
  40
  41         /**
  42          * Country bean
  43          */
  44         private static CountrySingletonBeanRemote COUNTRY_BEAN;
  45
  46         /**
  47          * Initialization of this converter
  48          */
  49         public PizzaCountryConverter () {
  50         }
  51
  52         @Override
  53         public Object getAsObject (final FacesContext context, final UIComponent component, final String submittedValue) {
  54                 // Is the value null or empty?
  55                 if ((null == submittedValue) || (submittedValue.trim().isEmpty())) {
  56                         // Warning message
  57                         // @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
  58
  59                         // Return null
  60                         return null;
  61                 }
  62
  63                 // Is the bean there?
  64                 // @TODO Requires this synchronization or is it (sync) confusing the container?
  65                 if (null == PizzaCountryConverter.COUNTRY_BEAN) {
  66                         // Try to get it
  67                         try {
  68                                 // Get initial context
  69                                 Context initialContext = new InitialContext();
  70
  71                                 // ... and country bean
  72                                 PizzaCountryConverter.COUNTRY_BEAN = (CountrySingletonBeanRemote) initialContext.lookup("java:global/pizzaapplication-ejb/country!org.mxchange.jcountry.data.CountrySingletonBeanRemote"); //NOI18N
  73                         } catch (final NamingException ex) {
  74                                 // Continue to throw it
  75                                 throw new ConverterException(MessageFormat.format("initialContext.lookup() failed: {0}", ex.getMessage()), ex); //NOI18N
  76                         }
  77                 }
  78
  79                 // Get full list
  80                 List<Country> countryList = PizzaCountryConverter.COUNTRY_BEAN.allCountries();
  81
  82                 // Init value
  83                 Country country = null;
  84
  85                 // Try this better
  86                 try {
  87                         // Convert it to long
  88                         Long countryId = Long.parseLong(submittedValue);
  89
  90                         // Category id should not be below 1
  91                         assert (countryId > 0) : "countryId is smaller than one: " + countryId; //NOI18N
  92
  93                         // Try to find it
  94                         for (final Country cntry : countryList) {
  95                                 // Is the id the same? (null-safe)
  96                                 if (Objects.equals(cntry.getCountryId(), countryId)) {
  97                                         // Found it
  98                                         country = cntry;
  99                                         break;
 100                                 }
 101                         }
 102                 } catch (final NumberFormatException ex) {
 103                         // Throw again
 104                         throw new ConverterException(ex);
 105                 }
 106
 107                 // Return it
 108                 return country;
 109         }
 110
 111         @Override
 112         public String getAsString (final FacesContext context, final UIComponent component, final Object value) {
 113                 // Is the object null?
 114                 if ((null == value) || ((String.valueOf(value)).isEmpty())) {
 115                         // Is null
 116                         return ""; //NOI18N
 117                 } else if (!(value instanceof Country)) {
 118                         // Not same interface
 119                         throw new IllegalArgumentException(MessageFormat.format("value {0} does not implement Country.", value)); //NOI18N
 120                 }
 121
 122                 // Return category id
 123                 return String.valueOf(((Country) value).getCountryId());
 124         }
 125
 126 }