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: 1.1 $ $Date: 2002/08/14 18:30:30 $
*/
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
/*
* $Header: /home/cvs/jakarta-struts/contrib/scaffold/rss/RenderRss.java,v 1.1 2002/08/14 18:30:30 husted Exp $
* $Revision: 1.1 $
* $Date: 2002/08/14 18:30:30 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/