src/java/org/mxchange/addressbook/model/addressbook/AddressbookSessionBean.java

   1 /*
   2  * Copyright (C) 2015 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.model.addressbook;
  18
  19 import java.text.MessageFormat;
  20 import java.util.List;
  21 import javax.ejb.Stateless;
  22 import javax.persistence.NoResultException;
  23 import javax.persistence.Query;
  24 import org.mxchange.addressbook.exceptions.AddressbookNameAlreadyUsedException;
  25 import org.mxchange.addressbook.model.addressbook.entry.AddressbookEntry;
  26 import org.mxchange.jcoreee.database.BaseDatabaseBean;
  27 import org.mxchange.jusercore.model.user.User;
  28
  29 /**
  30  * A stateless bean handling addressbooks
  31  * <p>
  32  * @author Roland Haeder
  33  */
  34 @Stateless (name = "addressbook", mappedName = "ejb/stateless-addressbook", description = "A stateless bean for handling addressbooks")
  35 public class AddressbookSessionBean extends BaseDatabaseBean implements AddressbookSessionBeanRemote {
  36
  37         /**
  38          * Serial number
  39          */
  40         private static final long serialVersionUID = 129_857_871_287_691L;
  41
  42         @Override
  43         @SuppressWarnings ("unchecked")
  44         public List<AddressbookEntry> allEntries (final Addressbook addressbook) {
  45                 // Generate query
  46                 Query query = this.getEntityManager().createNamedQuery("AllAddressbookEntries"); //NOI18N
  47
  48                 // Set parameters
  49                 query.setParameter("addressbook", addressbook); //NOI18N
  50                 query.setParameter("owner", addressbook.getAddressbookUser()); //NOI18N
  51                 query.setParameter("sharer", addressbook.getAddressbookUser()); //NOI18N
  52
  53                 // Return it
  54                 return query.getResultList();
  55         }
  56
  57         @Override
  58         @SuppressWarnings ("unchecked")
  59         public List<Addressbook> getUsersList (final User loggedInUser) {
  60                 // Trace message
  61                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("getUsersList: loggedInUser={0} - CALLED!", loggedInUser)); //NOI18N
  62
  63                 // Is the user instance null?
  64                 if (null == loggedInUser) {
  65                         // Abort here
  66                         throw new NullPointerException("loggedInUser is null"); //NOI18N
  67                 }
  68
  69                 // Get query instance
  70                 Query query = this.getEntityManager().createNamedQuery("AllUsersAddressbooks", List.class); //NOI18N
  71
  72                 // Set parameter
  73                 query.setParameter("param", loggedInUser); //NOI18N
  74
  75                 // Get full list from JPA
  76                 List<Addressbook> addressbooks = query.getResultList();
  77
  78                 // Return it
  79                 return addressbooks;
  80         }
  81
  82         @Override
  83         public Addressbook createAddressbook (final Addressbook addressbook) throws AddressbookNameAlreadyUsedException {
  84                 // Is it not null?
  85                 if (null == addressbook) {
  86                         // Abort here
  87                         throw new NullPointerException("addressbook is null"); //NOI18N
  88                 } else if (addressbook.getAddressbookUser() == null) {
  89                         // User instance is null
  90                         throw new NullPointerException("addressbook.user should not be null."); //NOI18N
  91                 } else if (addressbook.getAddressbookName() == null) {
  92                         // Address book name not set
  93                         throw new NullPointerException("addressbook.addressbookName should not be null"); //NOI18N
  94                 } else if (addressbook.getAddressbookName().isEmpty()) {
  95                         // Address book name not set
  96                         throw new IllegalArgumentException("addressbook.addressbookName should not be empty"); //NOI18N
  97                 } else if (this.isAddressbookNameUsed(addressbook)) {
  98                         // The assigned user already used that name
  99                         throw new AddressbookNameAlreadyUsedException(addressbook);
 100                 }
 101
 102                 // Persist it now
 103                 this.getEntityManager().persist(addressbook);
 104
 105                 // Flush it to get all data
 106                 this.getEntityManager().flush();
 107
 108                 // Return it updated
 109                 return addressbook;
 110         }
 111
 112         @Override
 113         public boolean isAddressbookIdUsed (final Long addressbookId) {
 114                 // Trace message
 115                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("isAddressbookIdUsed: addressbookId={0} - CALLED!", addressbookId)); //NOI18N
 116
 117                 // Is it null or zero?
 118                 if (null == addressbookId) {
 119                         // Throw NPE
 120                         throw new NullPointerException("addressbookId is null"); //NOI18N
 121                 } else if (addressbookId < 1) {
 122                         // Not valid id number
 123                         throw new IllegalArgumentException(MessageFormat.format("addressbookId is not valid: {0}", addressbookId)); //NOI18N
 124                 }
 125
 126                 // Get query instance
 127                 Query query = this.getEntityManager().createNamedQuery("FindAddressbookById"); //NOI18N
 128
 129                 // Set parameter
 130                 query.setParameter("id", addressbookId); //NOI18N
 131
 132                 // Default is not valid
 133                 boolean isValid = false;
 134
 135                 // Try it again, yes no other way
 136                 try {
 137                         // Get single result
 138                         Addressbook addressbook = (Addressbook) query.getSingleResult();
 139
 140                         // Debug message
 141                         this.getLoggerBeanLocal().logDebug(MessageFormat.format("isAddressbookIdUsed: addressbook={0} - FOUND!", addressbook)); //NOI18N
 142
 143                         // Found one!
 144                         isValid = true;
 145                 } catch (final NoResultException ex) {
 146                         // Debug log only, maybe out-dated link followed
 147                         this.getLoggerBeanLocal().logDebug(MessageFormat.format("isAddressbookIdUsed: addressbookId={0} is not valid: {1}", addressbookId, ex)); //NOI18N
 148                 }
 149
 150                 // Trace message
 151                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("isAddressbookIdUsed: isValid={0} - EXIT!", isValid)); //NOI18N
 152
 153                 // Return result
 154                 return isValid;
 155         }
 156
 157         @Override
 158         public boolean isAddressbookNameUsed (final Addressbook addressbook) {
 159                 // Is it not null?
 160                 if (null == addressbook) {
 161                         // Abort here
 162                         throw new NullPointerException("addressbook is null"); //NOI18N
 163                 } else if (addressbook.getAddressbookUser() == null) {
 164                         // User instance is null
 165                         throw new NullPointerException("addressbook.user should not be null."); //NOI18N
 166                 } else if (addressbook.getAddressbookName() == null) {
 167                         // Address book name not set
 168                         throw new NullPointerException("addressbook.addressbookName should not be null"); //NOI18N
 169                 } else if (addressbook.getAddressbookName().isEmpty()) {
 170                         // Address book name not set
 171                         throw new IllegalArgumentException("addressbook.addressbookName should not be empty"); //NOI18N
 172                 }
 173
 174                 // Get query instance
 175                 Query query = this.getEntityManager().createNamedQuery("SearchUserAddressbookName", Addressbook.class); //NOI18N
 176
 177                 // Set parameter
 178                 query.setParameter("user", addressbook.getAddressbookUser()); //NOI18N
 179                 query.setParameter("name", addressbook.getAddressbookName()); //NOI18N
 180
 181                 // Default is not found
 182                 boolean isUsed = false;
 183
 184                 // Try it
 185                 try {
 186                         // Get a single result
 187                         Addressbook dummy = (Addressbook) query.getSingleResult();
 188
 189                         // Log it
 190                         this.getLoggerBeanLocal().logDebug(MessageFormat.format("isAddressbookNameUsed: Found an address book: {0}", dummy)); //NOI18N
 191
 192                         // Found one
 193                         isUsed = true;
 194                 } catch (final NoResultException ex) {
 195                         // No result found, so log it away
 196                         this.getLoggerBeanLocal().logDebug(MessageFormat.format("isAddressbookNameUsed: getSingleResult() did not return a result: {0}", ex)); //NOI18N
 197                 }
 198
 199                 // Return result
 200                 return isUsed;
 201         }
 202 }