001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.struts;
016    
017    import javax.servlet.ServletRequest;
018    import javax.servlet.jsp.PageContext;
019    
020    import org.apache.struts.taglib.tiles.ComponentConstants;
021    import org.apache.struts.tiles.ComponentContext;
022    
023    /**
024     * @author Shuyang Zhou
025     */
026    public class TilesAttributeUtil {
027    
028            public static Object getTilesAttribute(
029                    PageContext pageContext, String tilesAttributeName) {
030    
031                    ServletRequest servletRequest = pageContext.getRequest();
032    
033                    String value = servletRequest.getParameter(tilesAttributeName);
034    
035                    if (value != null) {
036                            return value;
037                    }
038    
039                    ComponentContext componentContext =
040                            (ComponentContext)pageContext.getAttribute(
041                                    ComponentConstants.COMPONENT_CONTEXT,
042                                    PageContext.REQUEST_SCOPE);
043    
044                    if (componentContext == null) {
045                            return null;
046                    }
047    
048                    return componentContext.getAttribute(tilesAttributeName);
049            }
050    
051            public static void removeComponentContext(PageContext pageContext) {
052                    pageContext.removeAttribute(ComponentConstants.COMPONENT_CONTEXT);
053            }
054    
055    }