2 * Copyright (C) 2016 Roland Haeder
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.
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.
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/>.
17 package org.mxchange.addressbook.model.shared;
19 import java.text.MessageFormat;
20 import java.util.List;
21 import java.util.Objects;
22 import javax.ejb.Stateless;
23 import javax.persistence.NoResultException;
24 import javax.persistence.Query;
25 import org.mxchange.addressbook.exceptions.UserAlreadySharingAddressbookException;
26 import org.mxchange.addressbook.model.addressbook.Addressbook;
27 import org.mxchange.addressbook.model.addressbook.shared.AddressbookShare;
28 import org.mxchange.addressbook.model.addressbook.shared.ShareableAddressbook;
29 import org.mxchange.jcoreee.database.BaseDatabaseBean;
30 import org.mxchange.jusercore.model.user.User;
33 * A stateless bean for handling address book sharing
35 * @author Roland Haeder
37 @Stateless (name = "share", mappedName = "ejb/stateless-share", description = "A stateless bean for handling shared addressbooks")
38 public class SharedAddressbooksSessionBean extends BaseDatabaseBean implements SharedAddressbooksSessionBeanRemote {
43 private static final long serialVersionUID = 136_984_697_285_694_710L;
46 @SuppressWarnings ("unchecked")
47 public List<ShareableAddressbook> allSharedAddressbooks (final User user) {
49 this.getLoggerBeanLocal().logTrace(MessageFormat.format("allSharedAddressbooks: user={0} - CALLED!", user)); //NOI18N
54 throw new NullPointerException("user is null"); //NOI18N
55 } else if (user.getUserId() == null) {
56 // Null userId is not allowed
57 throw new NullPointerException("user.userId is null"); //NOI18N
58 } else if (user.getUserId() < 1) {
60 throw new IllegalArgumentException(MessageFormat.format("user.UserId={0} is an invalid value", user.getUserId())); //NOI18N
64 Query query = this.getEntityManager().createNamedQuery("SearchUserSharedAddressbooks", List.class); //NOI18N
67 query.setParameter("user", user); //NOI18N
70 List<ShareableAddressbook> list = query.getResultList();
73 this.getLoggerBeanLocal().logTrace(MessageFormat.format("allSharedAddressbooks: list.size()={0} - EXIT!", list.size()));
80 public Boolean isUserSharingAddressbooks (final User user) {
82 this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserSharingAddressbooks: user={0} - CALLED!", user)); //NOI18N
87 throw new NullPointerException("user is null"); //NOI18N
88 } else if (user.getUserId() == null) {
89 // Null userId is not allowed
90 throw new NullPointerException("user.userId is null"); //NOI18N
91 } else if (user.getUserId() < 1) {
93 throw new IllegalArgumentException(MessageFormat.format("user.UserId={0} is an invalid value", user.getUserId())); //NOI18N
97 List<ShareableAddressbook> list = this.allSharedAddressbooks(user);
100 this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserSharingAddressbooks: list.size()={0}", list.size())); //NOI18N
103 Boolean isSharing = (!list.isEmpty());
106 this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserSharingAddressbooks: iSharing={0} - EXIT!", isSharing)); //NOI18N
113 public ShareableAddressbook startSharing (final User sharee, final Addressbook addressbook) throws UserAlreadySharingAddressbookException {
115 this.getLoggerBeanLocal().logTrace(MessageFormat.format("startSharing: sharee={0},addressbook={1} - CALLED!", sharee, addressbook)); //NOI18N
117 // Check all conditions
118 if (null == sharee) {
120 throw new NullPointerException("sharee is null"); //NOI18N
121 } else if (sharee.getUserId() == null) {
123 throw new NullPointerException("sharee.userId is null"); //NOI18N
124 } else if (sharee.getUserId() < 1) {
126 throw new IllegalStateException(MessageFormat.format("sharee.userId={0} is invalid", sharee.getUserId())); //NOI18N
127 } else if (null == addressbook) {
129 throw new NullPointerException("addressbook is null"); //NOI18N
130 } else if (addressbook.getAddressbookId() == null) {
132 throw new NullPointerException("addressbook.addressbookId is null"); //NOI18N
133 } else if (addressbook.getAddressbookId() < 1) {
135 throw new IllegalArgumentException(MessageFormat.format("addressbook.addressbookId={0} is invalid.", addressbook.getAddressbookId())); //NOI18N
136 } else if (Objects.equals(addressbook.getAddressbookUser(), sharee)) {
137 // Sharing with yourself!
138 throw new IllegalStateException("User tries to share with himself."); //NOI18N
141 // Is the entry already there?
142 if (this.isUserAlreadySharingAddressbook(addressbook, sharee)) {
144 throw new UserAlreadySharingAddressbookException(addressbook, sharee);
147 // All fine so far, then create the instance
148 ShareableAddressbook share = new AddressbookShare(addressbook, sharee);
151 this.getLoggerBeanLocal().logDebug(MessageFormat.format("startSharing: share={0}", share)); //NOI18N
154 this.getEntityManager().persist(share);
156 // Flush to get id number
157 this.getEntityManager().flush();
159 // Return updated instance
164 * Checks whether the owner of the given address book is already sharing it
167 * @param addressbook Address book to be shared with
168 * @param sharee User sharee instance
170 * @return Wether the address book is already shared with the sharee
172 private boolean isUserAlreadySharingAddressbook (final Addressbook addressbook, final User sharee) {
174 this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserAlreadySharingAddressbook: addressbook={0},sharee={1} - CALLED!", addressbook, sharee)); //NOI18N
177 Query query = this.getEntityManager().createNamedQuery("SearchShareeAddressbookShare", AddressbookShare.class); //NOI18N
180 query.setParameter("addressbook", addressbook); //NOI18N
181 query.setParameter("sharee", sharee); //NOI18N
183 // Default is not found
184 boolean isFound = false;
188 // Get single instance
189 ShareableAddressbook share = (ShareableAddressbook) query.getSingleResult();
192 this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserAlreadySharingAddressbook: share={0} - FOUND!", share)); //NOI18N
196 } catch (final NoResultException ex) {
197 // Not found, log exception
198 this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserAlreadySharingAddressbook: Notfound. Exception: {0}", ex)); //NOI18N
202 this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserAlreadySharingAddressbook: isFound={0} - EXIT!", isFound)); //NOI18N