/*
* $Header: /home/cvs/jakarta-struts/contrib/scaffold/rss/RenderRss.java,v 1.2 2004/03/14 07:15:06 sraeburn Exp $
* $Revision: 1.2 $
* $Date: 2004/03/14 07:15:06 $
*
* 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 $Revision: 1.2 $ $Date: 2004/03/14 07:15:06 $
*/
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