| /* |
| * $Id$ |
| * |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package org.apache.struts.scaffold.rss; |
| |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.sql.SQLException; |
| import java.util.Iterator; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.commons.digester.rss.Channel; |
| import org.apache.commons.digester.rss.Item; |
| |
| import org.apache.commons.scaffold.lang.Tokens; |
| import org.apache.commons.scaffold.util.ResultList; |
| |
| import org.apache.struts.action.ActionError; |
| import org.apache.struts.action.ActionErrors; |
| import org.apache.struts.action.ActionForm; |
| import org.apache.struts.action.ActionForward; |
| import org.apache.struts.action.ActionMapping; |
| import org.apache.struts.action.ActionServlet; |
| |
| import org.apache.struts.scaffold.BaseAction; |
| |
| |
| /** |
| * Convert result bean to channel and render as response. |
| * |
| * @author Ted Husted |
| * @version $Rev$ $Date$ |
| */ |
| public final class RenderRss extends BaseAction { |
| |
| // ------------------------------------------------- Instance Variables |
| // ----------------------------------------------------- Public Methods |
| |
| |
| /** |
| (* // :FIXME: Hasn't been tested. |
| * Retrieves a Digester Channel bean from request context and |
| * renders it. |
| * <p> |
| * Channel bean must be stored under the attribute |
| * ParseRss.CHANNEL_KEY or under an attribute given as the |
| * parameter property. |
| * |
| * @param mapping The ActionMapping used to select this instance |
| * @param form The optional ActionForm bean for this request |
| * @param request The HTTP request we are processing |
| * @param response The resonse we are creating |
| * @fixme Use ActionForwards for links instead of properties |
| */ |
| public void executeLogic( |
| ActionMapping mapping, |
| ActionForm form, |
| HttpServletRequest request, |
| HttpServletResponse response) |
| throws Exception { |
| |
| ActionErrors errors = new ActionErrors(); |
| Channel channel = null; |
| |
| try { |
| channel = (Channel) |
| request.getAttribute(ParseRss.CHANNEL_KEY); |
| } |
| catch (Throwable t) { |
| channel = null; |
| } |
| |
| if (null==channel) { |
| try { |
| channel = (Channel) |
| request.getAttribute(mapping.getParameter()); |
| } |
| catch (Throwable t) { |
| channel = null; |
| } |
| } |
| |
| if (null==channel) { |
| errors.add(ActionErrors.GLOBAL_ERROR, |
| new ActionError(Tokens.PROCESS_MISSING_PARAMETER)); |
| } |
| |
| if (errors.empty()) { |
| response.setContentType(Tokens.TEXT_PLAIN); |
| channel.render(response.getWriter()); |
| } |
| |
| else { |
| // This will trigger findFailure() in the BaseAction |
| saveErrors(request,errors); |
| } |
| |
| } // end executeLogic() |
| |
| |
| /** |
| * Return null to the controller, indicating that the |
| * response has been rendered. |
| * |
| * @param mapping The ActionMapping used to select this instance |
| * @param actionForm The optional ActionForm bean for this request (if any) |
| * @param request The HTTP request we are processing |
| * @param response The response we are creating |
| * @param errors Our ActionErrors collection |
| */ |
| protected ActionForward findSuccess( |
| ActionMapping mapping, |
| ActionForm form, |
| HttpServletRequest request, |
| HttpServletResponse response) { |
| |
| return null; |
| |
| } // end findSucess() |
| |
| } // end RenderRss |