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.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 * Variation resolver that will use a variation with the same name as the extension. 43 * 44 * @version $Id$ 45 */ 46 public class ExtensionVariationResolver 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 String extension = aggregationState.getExtension(); 57 RenderableDefinition variation = renderableDefinition.getVariations().get(extension); 58 if (variation == null) { 59 return null; 60 } 61 62 return BeanMergerUtil.merge(variation, renderableDefinition); 63 } 64 65 /** 66 * This gets the aggregation state without throwing an exception if the current context is not a WebContext. 67 */ 68 protected AggregationState getAggregationStateSafely() { 69 if(MgnlContext.isWebContext()){ 70 return MgnlContext.getAggregationState(); 71 } 72 return null; 73 } 74 }