1 /**
2 * This file Copyright (c) 2013-2014 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.pages.app.availability;
35
36 import info.magnolia.jcr.util.NodeTypes;
37 import info.magnolia.jcr.util.NodeUtil;
38 import info.magnolia.ui.api.availability.AbstractAvailabilityRule;
39 import javax.jcr.Item;
40 import javax.jcr.Node;
41 import javax.jcr.RepositoryException;
42
43 import org.slf4j.Logger;
44 import org.slf4j.LoggerFactory;
45
46 /**
47 * This rule returns true, if the item is node of the mgnl:page type and has a subnode of the same type.
48 */
49 public class PageHasSubpagesRule extends AbstractAvailabilityRule {
50
51 private static final Logger log = LoggerFactory.getLogger(PageHasSubpagesRule.class);
52
53 @Override
54 public boolean isAvailableForItem(Item item) {
55 // item must be a Node
56 if (item != null && item.isNode()) {
57 Node node = (Node) item;
58 try {
59 // node must be of the Page type
60 if (NodeUtil.isNodeType(node, NodeTypes.Page.NAME)) {
61 // has sub-pages?
62 return NodeUtil.getNodes(node, NodeTypes.Page.NAME).iterator().hasNext();
63 }
64 } catch (RepositoryException e) {
65 String path = "unknown";
66 try {
67 path = node.getPath();
68 } catch (RepositoryException e1) {
69 // nothing to do
70 }
71 log.warn("Error evaluating availability for node [{}], returning false: {}", path, e.getMessage());
72 }
73 }
74 return false;
75 }
76 }