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.jcoreee.database.BaseDatabaseBean;
  26 import org.mxchange.jusercore.model.user.User;
  27
  28 /**
  29  * A stateless bean handling addressbooks
  30  * <p>
  31  * @author Roland Haeder
  32  */
  33 @Stateless (name = "addressbook", mappedName = "ejb/stateless-addressbook", description = "A stateless bean for handling addressbooks")
  34 public class AddressbookSessionBean extends BaseDatabaseBean implements AddressbookSessionBeanRemote {
  35
  36         /**
  37          * Serial number
  38          */
  39         private static final long serialVersionUID = 129_857_871_287_691L;
  40
  41         @Override
  42         @SuppressWarnings ("unchecked")
  43         public List<Addressbook> getUsersList (final User loggedInUser) {
  44                 // Trace message
  45                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("getUsersList: loggedInUser={0} - CALLED!", loggedInUser));
  46
  47                 // Is the user instance null?
  48                 if (null == loggedInUser) {
  49                         // Abort here
  50                         throw new NullPointerException("loggedInUser is null");
  51                 }
  52
  53                 // Get query instance
  54                 Query query = this.getEntityManager().createNamedQuery("AllUsersAddressbooks", List.class); //NOI18N
  55
  56                 // Set parameter
  57                 query.setParameter("param", loggedInUser); //NOI18N
  58
  59                 // Get full list from JPA
  60                 List<Addressbook> addressbooks = query.getResultList();
  61
  62                 // Return it
  63                 return addressbooks;
  64         }
  65
  66         @Override
  67         public Addressbook createAddressbook (final Addressbook addressbook) throws AddressbookNameAlreadyUsedException {
  68                 // Is it not null?
  69                 if (null == addressbook) {
  70                         // Abort here
  71                         throw new NullPointerException("addressbook is null"); //NOI18N
  72                 } else if (addressbook.getAddressbookUser() == null) {
  73                         // User instance is null
  74                         throw new NullPointerException("addressbook.user should not be null."); //NOI18N
  75                 } else if (addressbook.getAddressbookName() == null) {
  76                         // Address book name not set
  77                         throw new NullPointerException("addressbook.addressbookName should not be null"); //NOI18N
  78                 } else if (addressbook.getAddressbookName().isEmpty()) {
  79                         // Address book name not set
  80                         throw new IllegalArgumentException("addressbook.addressbookName should not be empty"); //NOI18N
  81                 } else if (this.isAddressbookNameUsed(addressbook)) {
  82                         // The assigned user already used that name
  83                         throw new AddressbookNameAlreadyUsedException(addressbook);
  84                 }
  85
  86                 // Persist it now
  87                 this.getEntityManager().persist(addressbook);
  88
  89                 // Flush it to get all data
  90                 this.getEntityManager().flush();
  91
  92                 // Return it updated
  93                 return addressbook;
  94         }
  95
  96         @Override
  97         public boolean isAddressbookNameUsed (final Addressbook addressbook) {
  98                 // Is it not null?
  99                 if (null == addressbook) {
 100                         // Abort here
 101                         throw new NullPointerException("addressbook is null"); //NOI18N
 102                 } else if (addressbook.getAddressbookUser() == null) {
 103                         // User instance is null
 104                         throw new NullPointerException("addressbook.user should not be null."); //NOI18N
 105                 } else if (addressbook.getAddressbookName() == null) {
 106                         // Address book name not set
 107                         throw new NullPointerException("addressbook.addressbookName should not be null"); //NOI18N
 108                 } else if (addressbook.getAddressbookName().isEmpty()) {
 109                         // Address book name not set
 110                         throw new IllegalArgumentException("addressbook.addressbookName should not be empty"); //NOI18N
 111                 }
 112
 113                 // Get query instance
 114                 Query query = this.getEntityManager().createNamedQuery("SearchUserAddressbookName", Addressbook.class);
 115
 116                 // Set parameter
 117                 query.setParameter("user", addressbook.getAddressbookUser());
 118                 query.setParameter("name", addressbook.getAddressbookName());
 119
 120                 // Default is not found
 121                 boolean isUsed = false;
 122
 123                 // Try it
 124                 try {
 125                         // Get a single result
 126                         Addressbook dummy = (Addressbook) query.getSingleResult();
 127
 128                         // Log it
 129                         this.getLoggerBeanLocal().logDebug(MessageFormat.format("isAddressbookNameUsed: Found an address book: {0}", dummy));
 130
 131                         // Found one
 132                         isUsed = true;
 133                 } catch (final NoResultException ex) {
 134                         // No result found, so log it away
 135                         this.getLoggerBeanLocal().logDebug("isAddressbookNameUsed: getSingleResult() did not return a result: " + ex);
 136                 }
 137
 138                 // Return result
 139                 return isUsed;
 140         }
 141 }