1 /**
2 * This file Copyright (c) 2003-2010 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.core.Content;
37 import info.magnolia.cms.beans.config.VersionConfig;
38 import info.magnolia.objectfactory.Components;
39
40 import javax.jcr.RepositoryException;
41 import javax.jcr.version.VersionHistory;
42 import javax.jcr.version.VersionIterator;
43
44 import org.slf4j.Logger;
45 import org.slf4j.LoggerFactory;
46
47
48 /**
49 * Singleton class which should be used for any operation related to versioning VersionManager synchronizes all
50 * operations like add version, restore version and remove version but it does not synchronize between operations
51 * @author Sameer Charles
52 * $Id:VersionManager.java 6430 2006-09-20 11:25:35Z scharles $
53 */
54 public final class VersionManager extends BaseVersionManager {
55
56 /**
57 * Logger.
58 */
59 private static Logger log = LoggerFactory.getLogger(VersionManager.class);
60
61 /**
62 * do not instanciate
63 */
64 public VersionManager() {
65 try {
66 this.createInitialStructure();
67 }
68 catch (RepositoryException re) {
69 log.error("Failed to initialize VersionManager");
70 log.error(re.getMessage(), re);
71 }
72 }
73
74 /**
75 * get instance
76 */
77 public static VersionManager getInstance() {
78 return Components.getSingleton(VersionManager.class);
79 }
80
81 /**
82 * since version is set "only revert" always return true
83 * */
84 public boolean isInvalidMaxVersions() {
85 return VersionConfig.getInstance().getMaxVersionAllowed() < 1;
86 }
87
88 /**
89 * set version history to max version possible
90 * @param node
91 * @throws RepositoryException if failed to get VersionHistory or fail to remove
92 */
93 public void setMaxVersionHistory(Content node) throws RepositoryException {
94 VersionHistory history = node.getJCRNode().getVersionHistory();
95 VersionIterator versions = history.getAllVersions();
96 // size - 2 to skip root version
97 long indexToRemove = (versions.getSize() - 2) - VersionConfig.getInstance().getMaxVersionAllowed();
98 if (indexToRemove > 0) {
99 // skip root version
100 versions.nextVersion();
101 // remove the version after rootVersion
102 for (; indexToRemove > 0; indexToRemove--) {
103 history.removeVersion(versions.nextVersion().getName());
104 }
105 }
106 }
107
108 }