1 /**
2 * This file Copyright (c) 2011 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.jcr.wrapper;
35
36 import javax.jcr.Node;
37 import javax.jcr.RepositoryException;
38 import javax.jcr.Session;
39
40 import info.magnolia.context.MgnlContext;
41 import info.magnolia.jcr.RuntimeRepositoryException;
42
43
44 /**
45 * Node wrapper that will reacquire the node if its session is closed.
46 *
47 * @version $Id$
48 */
49 public class LazyNodeWrapper extends DelegateNodeWrapper {
50
51 private String workspace;
52 private String nodeIdentifier;
53 private transient Node node;
54
55 public LazyNodeWrapper(String workspace, String nodeIdentifier) {
56 this.workspace = workspace;
57 this.nodeIdentifier = nodeIdentifier;
58 }
59
60 public LazyNodeWrapper(Node node) throws RepositoryException {
61 this.workspace = node.getSession().getWorkspace().getName();
62 this.nodeIdentifier = node.getIdentifier();
63 this.node = node;
64 }
65
66 @Override
67 public synchronized Node getWrappedNode() {
68 try {
69 if (node == null || !node.getSession().isLive()) {
70 Session session = getSessionForWrappedNode(this.workspace);
71 node = session.getNodeByIdentifier(this.nodeIdentifier);
72 }
73 }
74 catch (RepositoryException e) {
75 throw new RuntimeException(e);
76 }
77 return node;
78 }
79
80 @Override
81 public void setWrappedNode(Node node) {
82 try {
83 this.workspace = node.getSession().getWorkspace().getName();
84 this.nodeIdentifier = node.getIdentifier();
85 this.node = node;
86 } catch (RepositoryException e) {
87 throw new RuntimeRepositoryException(e);
88 }
89 }
90
91 protected Session getSessionForWrappedNode(String workspace) throws RepositoryException {
92 return MgnlContext.getSystemContext().getJCRSession(workspace);
93 }
94 }