001    /**
002     * Copyright (c) 2000-2011 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.taglib.portlet;
016    
017    import com.liferay.portal.kernel.util.JavaConstants;
018    
019    import javax.portlet.PortletResponse;
020    
021    import javax.servlet.http.HttpServletRequest;
022    import javax.servlet.jsp.JspException;
023    import javax.servlet.jsp.tagext.TagSupport;
024    
025    /**
026     * @author Brian Wing Shun Chan
027     */
028    public class NamespaceTag extends TagSupport {
029    
030            public int doStartTag() throws JspException {
031                    try {
032                            HttpServletRequest request =
033                                    (HttpServletRequest)pageContext.getRequest();
034    
035                            PortletResponse portletResponse =
036                                    (PortletResponse)request.getAttribute(
037                                            JavaConstants.JAVAX_PORTLET_RESPONSE);
038    
039                            if (portletResponse != null) {
040                                    String namespace = portletResponse.getNamespace();
041    
042                                    pageContext.getOut().print(namespace);
043                            }
044                    }
045                    catch (Exception e) {
046                            throw new JspException(e);
047                    }
048    
049                    return SKIP_BODY;
050            }
051    
052    }