1 /**
2 * This file Copyright (c) 2003-2013 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.cms.core.version;
35
36 import info.magnolia.cms.beans.config.VersionConfig;
37 import info.magnolia.objectfactory.Components;
38
39 import javax.inject.Singleton;
40 import javax.jcr.Node;
41 import javax.jcr.RepositoryException;
42 import javax.jcr.version.VersionHistory;
43 import javax.jcr.version.VersionIterator;
44
45 import org.slf4j.Logger;
46 import org.slf4j.LoggerFactory;
47
48
49 /**
50 * CE version of the VersionManager. Limited to one version only.
51 */
52 @Singleton
53 public final class VersionManager extends BaseVersionManager {
54
55 /**
56 * Logger.
57 */
58 private static Logger log = LoggerFactory.getLogger(VersionManager.class);
59
60 /**
61 * Don't instantiate.
62 */
63 public VersionManager() {
64 try {
65 this.createInitialStructure();
66 }
67 catch (RepositoryException re) {
68 log.error("Failed to initialize VersionManager");
69 log.error(re.getMessage(), re);
70 }
71 }
72
73 public static VersionManager getInstance() {
74 return Components.getSingleton(VersionManager.class);
75 }
76
77 /**
78 * Since version is set "only revert" always return true.
79 */
80 @Override
81 public boolean isInvalidMaxVersions() {
82 return VersionConfig.getInstance().getMaxVersionAllowed() < 1;
83 }
84
85 /**
86 * Set version history to max version possible.
87 * @param node
88 * @throws RepositoryException if failed to get VersionHistory or fail to remove
89 */
90 @Override
91 public void setMaxVersionHistory(Node node) throws RepositoryException {
92 VersionHistory history = node.getVersionHistory();
93 VersionIterator versions = history.getAllVersions();
94 // size - 2 to skip root version
95 long indexToRemove = (versions.getSize() - 2) - VersionConfig.getInstance().getMaxVersionAllowed();
96 if (indexToRemove > 0) {
97 // skip root version
98 versions.nextVersion();
99 // remove the version after rootVersion
100 for (; indexToRemove > 0; indexToRemove--) {
101 history.removeVersion(versions.nextVersion().getName());
102 }
103 }
104 }
105
106 }