1 /**
2 * This file Copyright (c) 2003-2011 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.cms.taglibs;
35
36 import info.magnolia.cms.core.Content;
37 import info.magnolia.cms.core.NodeData;
38 import info.magnolia.cms.i18n.I18nContentSupportFactory;
39
40 import org.apache.commons.lang.StringUtils;
41 import org.slf4j.Logger;
42 import org.slf4j.LoggerFactory;
43
44
45 /**
46 * This is exactly the opposite of the ifNotExisting Tag.
47 * @jsp.tag name="ifExisting" body-content="JSP"
48 *
49 * @author Michael Aemisegger
50 * @version $Revision $ ($Author $)
51 */
52 public class IfExisting extends BaseConditionalContentTag {
53 private static final Logger log = LoggerFactory.getLogger(IfExisting.class);
54
55 private String nodeDataName = StringUtils.EMPTY;
56
57 /**
58 * @param name , antom name to evaluate
59 * @jsp.attribute required="false" rtexprvalue="true"
60 */
61 public void setNodeDataName(String name) {
62 this.nodeDataName = name;
63 }
64
65 protected boolean condition() {
66 Content node = this.getFirstMatchingNode();
67
68 // if the tag is checking for a nodes existance
69 if (StringUtils.isEmpty(this.nodeDataName)) {
70 return node != null;
71 }
72 else {
73 NodeData nodeData = I18nContentSupportFactory.getI18nSupport().getNodeData(node, this.nodeDataName);
74 return (nodeData != null) && nodeData.isExist();
75 }
76 }
77
78 }