src/java/org/mxchange/jcountry/model/data/AddressbookAdminCountrySingletonBean.java

   1 /*
   2  * Copyright (C) 2016 - 2018 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.jcountry.model.data;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Date;
  21 import java.util.Objects;
  22 import javax.ejb.EJB;
  23 import javax.ejb.Stateless;
  24 import org.mxchange.jcountry.exceptions.CountryAlreadyAddedException;
  25 import org.mxchange.addressbook.enterprise.BaseAddressbookEnterpriseBean;
  26
  27 /**
  28  * A stateless EJB for administrative country purposes
  29  * <p>
  30  * @author Roland Häder<roland@mxchange.org>
  31  */
  32 @Stateless (name = "adminCountry", description = "A stateless session-scoped bean for administrative country purposes")
  33 public class AddressbookAdminCountrySingletonBean extends BaseAddressbookEnterpriseBean implements AdminCountrySessionBeanRemote {
  34
  35         /**
  36          * Serial number
  37          */
  38         private static final long serialVersionUID = 15_846_983_298_691_208L;
  39
  40         /**
  41          * Remote country EJB
  42          */
  43         @EJB (lookup = "java:global/addressbook-ejb/country!org.mxchange.jcountry.model.data.CountrySingletonBeanRemote")
  44         private CountrySingletonBeanRemote countryBean;
  45
  46         /**
  47          * Default constructor
  48          */
  49         public AddressbookAdminCountrySingletonBean () {
  50                 // Call super constructor
  51                 super();
  52         }
  53
  54         @Override
  55         public Country addCountry (final Country country) throws CountryAlreadyAddedException {
  56                 // Trace message
  57                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.addCountry: country={1} - CALLED!", this.getClass().getSimpleName(), country)); //NOI18N
  58
  59                 // Is it already there?
  60                 if (null == country) {
  61                         // Throw NPE
  62                         throw new NullPointerException("country is null"); //NOI18N
  63                 } else if (country.getCountryCode() == null) {
  64                         // Required field not set
  65                         throw new NullPointerException("country.countryCode is null"); //NOI18N
  66                 } else if (country.getCountryCode().isEmpty()) {
  67                         // Code is not set
  68                         throw new IllegalArgumentException("country.countryCode is empty"); //NOI18N
  69                 } else if (country.getCountryI18nKey() == null) {
  70                         // Required field not set
  71                         throw new NullPointerException("country.countryI18nKey is null"); //NOI18N
  72                 } else if (country.getCountryI18nKey().isEmpty()) {
  73                         // I18n key is not set
  74                         throw new IllegalArgumentException("country.countryI18nKey is empty"); //NOI18N
  75                 } else if (country.getCountryId() != null) {
  76                         // Should be null
  77                         throw new IllegalArgumentException(MessageFormat.format("country.countryId is not null ({0})", country.getCountryId())); //NOI18N
  78                 } else if (this.isCountryAdded(country)) {
  79                         // Yes, then abort here
  80                         throw new CountryAlreadyAddedException(country);
  81                 }
  82
  83                 // Add timestamp
  84                 country.setCountryEntryCreated(new Date());
  85
  86                 // It is not added, so persist it
  87                 this.getEntityManager().persist(country);
  88
  89                 // Trace message
  90                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.addCountry: country={1} - EXIT!", this.getClass().getSimpleName(), country)); //NOI18N
  91
  92                 // Return updated instance
  93                 return country;
  94         }
  95
  96         /**
  97          * Checks whether given country is already added by i18n key or country
  98          * code, what comes first.
  99          * <p>
 100          * @param country Country instance to check
 101          * <p>
 102          * @return Whether the country was found
 103          */
 104         private boolean isCountryAdded (final Country country) {
 105                 if (null == country) {
 106                         // Throw NPE
 107                         throw new NullPointerException("country is null"); //NOI18N
 108                 } else if (country.getCountryCode().isEmpty()) {
 109                         // Code is not set
 110                         throw new IllegalArgumentException("country.countryCode is empty"); //NOI18N
 111                 } else if (country.getCountryI18nKey().isEmpty()) {
 112                         // I18n key is not set
 113                         throw new IllegalArgumentException("country.countryI18nKey is empty"); //NOI18N
 114                 } else if (country.getCountryId() != null) {
 115                         // Should be null
 116                         throw new IllegalArgumentException(MessageFormat.format("country.countryId is not null ({0})", country.getCountryId())); //NOI18N
 117                 }
 118
 119                 // Default is not found
 120                 boolean isAdded = false;
 121
 122                 // Try to match code/i18n key (should be both unique!)
 123                 for (final Country currentCountry : this.countryBean.fetchAllCountries()) {
 124                         // Is it matching
 125                         if (Objects.equals(country, currentCountry)) {
 126                                 // Yes, then set flag and abort loop
 127                                 isAdded = true;
 128                                 break;
 129                         }
 130                 }
 131
 132                 // Return result
 133                 return isAdded;
 134         }
 135
 136 }