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.taglib.portlet;
016    
017    import com.liferay.portal.kernel.servlet.taglib.TagSupport;
018    import com.liferay.portal.kernel.util.JavaConstants;
019    
020    import javax.portlet.PortletResponse;
021    
022    import javax.servlet.http.HttpServletRequest;
023    import javax.servlet.jsp.JspException;
024    import javax.servlet.jsp.JspWriter;
025    
026    /**
027     * @author Brian Wing Shun Chan
028     */
029    public class NamespaceTag extends TagSupport {
030    
031            @Override
032            public int doStartTag() throws JspException {
033                    try {
034                            HttpServletRequest request =
035                                    (HttpServletRequest)pageContext.getRequest();
036    
037                            PortletResponse portletResponse =
038                                    (PortletResponse)request.getAttribute(
039                                            JavaConstants.JAVAX_PORTLET_RESPONSE);
040    
041                            if (portletResponse != null) {
042                                    String namespace = portletResponse.getNamespace();
043    
044                                    JspWriter jspWriter = pageContext.getOut();
045    
046                                    jspWriter.write(namespace);
047                            }
048                    }
049                    catch (Exception e) {
050                            throw new JspException(e);
051                    }
052    
053                    return SKIP_BODY;
054            }
055    
056    }