1 /**
2 * This file Copyright (c) 2012 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.rendering.template.variation;
35
36 import info.magnolia.beanmerger.BeanMergerUtil;
37 import info.magnolia.cms.core.AggregationState;
38 import info.magnolia.context.MgnlContext;
39 import info.magnolia.rendering.template.RenderableDefinition;
40
41 /**
42 * Resolver that will combinate channel and extension variation resolver.
43 *
44 * @version $Id$
45 */
46 public class DefaultRenderableVariationResolver implements RenderableVariationResolver{
47
48 @Override
49 public RenderableDefinition resolveVariation(RenderableDefinition renderableDefinition) {
50
51 AggregationState aggregationState = getAggregationStateSafely();
52 if (aggregationState == null) {
53 return null;
54 }
55
56 final String channelName = aggregationState.getChannel().getName();
57 final String extensionName = aggregationState.getExtension();
58 final String channelExtensionName = channelName + "-" + extensionName;
59
60 RenderableDefinition defVariation = renderableDefinition.getVariations().get(channelExtensionName);
61 if (defVariation != null) {
62 return BeanMergerUtil.merge(defVariation, renderableDefinition);
63 }
64
65 defVariation = renderableDefinition.getVariations().get(extensionName);
66 if (defVariation != null) {
67 return BeanMergerUtil.merge(defVariation, renderableDefinition);
68 }
69
70 defVariation = renderableDefinition.getVariations().get(channelName);
71 if (defVariation != null) {
72 return BeanMergerUtil.merge(defVariation, renderableDefinition);
73 }
74
75 return null;
76 }
77
78 /**
79 * This gets the aggregation state without throwing an exception if the current context is not a WebContext.
80 */
81 protected AggregationState getAggregationStateSafely() {
82 if(MgnlContext.isWebContext()){
83 return MgnlContext.getAggregationState();
84 }
85 return null;
86 }
87 }