package org.apache.turbine.modules.screens.error;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001-2003 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 acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Turbine" 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",
* "Apache Turbine", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* 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/>.
*/
import org.apache.ecs.ConcreteElement;
import org.apache.ecs.ElementContainer;
import org.apache.ecs.html.A;
import org.apache.turbine.modules.Screen;
import org.apache.turbine.util.RunData;
import org.apache.turbine.util.parser.ParameterParser;
import org.apache.turbine.util.uri.TurbineURI;
/**
* Users will get this screen if the screen on their browser is in an
* invalid state. For example, if they hit "Back" or "Reload" and
* then try to submit old form data.
*
* If you want one of your screens to check for invalid state
* then add a hidden form field called "_session_access_counter"
* with the value currently stored in the session. The
* SessionValidator action will check to see if it is an old
* value and redirect you to this screen.
*
* @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
* @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
* @version $Id: InvalidState.java,v 1.7 2003/05/07 15:46:39 henning Exp $
*/
public class InvalidState
extends Screen
{
/**
* Build the Screen.
*
* @param data Turbine information.
* @exception Exception, a generic exception.
*/
public ConcreteElement doBuild(RunData data)
throws Exception
{
ElementContainer body = new ElementContainer();
ElementContainer message = new ElementContainer();
StringBuffer sb = new StringBuffer();
sb.append("<b>There has been an error.</b>")
.append("<p>")
.append("- If you used the browser \"Back\" or \"Reload\"")
.append(" buttons please use the navigation buttons we provide")
.append(" within the screen.")
.append("<p>")
.append("Please click ");
message.addElement(sb.toString());
ParameterParser pp;
pp = (ParameterParser) data.getUser().getTemp("prev_parameters");
pp.remove("_session_access_counter");
TurbineURI back = new TurbineURI(data,(String) data.getUser().getTemp("prev_screen"));
back.addPathInfo(pp);
message.addElement(new A().setHref(back.getRelativeLink()).addElement("here"));
message.addElement(" to return the the screen you were working on.");
body.addElement(message);
return body;
}
}