001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
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    }