001    /**
002     * Copyright (c) 2000-2011 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.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.JspWriter;
024    import javax.servlet.jsp.tagext.TagSupport;
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    }