NamespaceTag.java

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.taglib.portlet;

import com.liferay.portal.kernel.util.JavaConstants;
import com.liferay.taglib.TagSupport;

import javax.portlet.PortletResponse;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;

/**
 * @author Brian Wing Shun Chan
 */
public class NamespaceTag extends TagSupport {

	@Override
	public int doStartTag() throws JspException {
		try {
			HttpServletRequest request =
				(HttpServletRequest)pageContext.getRequest();

			PortletResponse portletResponse =
				(PortletResponse)request.getAttribute(
					JavaConstants.JAVAX_PORTLET_RESPONSE);

			if (portletResponse != null) {
				String namespace = portletResponse.getNamespace();

				JspWriter jspWriter = pageContext.getOut();

				jspWriter.write(namespace);
			}
		}
		catch (Exception e) {
			throw new JspException(e);
		}

		return SKIP_BODY;
	}

}