/*
* Copyright 2001,2004 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.jetspeed.modules.actions;
// Turbine Classes
import org.apache.turbine.TurbineConstants;
import org.apache.turbine.util.RunData;
import org.apache.turbine.modules.actions.sessionvalidator.SessionValidator;
import org.apache.jetspeed.services.rundata.JetspeedRunData;
import org.apache.jetspeed.services.resources.JetspeedResources;
import org.apache.jetspeed.services.JetspeedSecurity;
/**
* SessionValidator for use with the Template Service, the
* TemplateSessionValidator is virtually identical to the
* TemplateSecureValidator except that it does not tranfer to the
* login page when it detects a null user (or a user not logged in).
*
* <p>The Template Service requires a different Session Validator
* because of the way it handles screens.
*
* @see TemplateSecureSessionValidator
* @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>
* @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
* @version $Id: TemplateSessionValidator.java,v 1.3 2004/02/23 02:59:06 jford Exp $
*/
public class TemplateSessionValidator extends SessionValidator
{
/**
* Execute the action.
*
* @param data Turbine information.
* @exception Exception, a generic exception.
*/
public void doPerform( RunData rundata ) throws Exception
{
JetspeedRunData data = (JetspeedRunData)rundata;
/*
* Pull user from session.
*/
data.populate();
// The user may have not logged in, so create a "guest" user.
if ( data.getUser() == null)
{
data.setUser(JetspeedSecurity.getAnonymousUser());
data.save();
}
// make sure we have some way to return a response
if ( !data.hasScreen() &&
data.getTemplateInfo().getScreenTemplate() == null )
{
String template = JetspeedResources.getString(
TurbineConstants.TEMPLATE_HOMEPAGE);
if (template != null)
{
data.getTemplateInfo().setScreenTemplate(template);
}
else
{
data.setScreen(JetspeedResources.getString(
TurbineConstants.SCREEN_HOMEPAGE));
}
}
// the session_access_counter can be placed as a hidden field in
// forms. This can be used to prevent a user from using the
// browsers back button and submitting stale data.
else if ( data.getParameters().containsKey("_session_access_counter") )
{
// See comments in screens.error.InvalidState.
if ( data.getParameters().getInt("_session_access_counter") <
(((Integer)data.getUser().getTemp("_session_access_counter"))
.intValue()-1) )
{
if (data.getTemplateInfo().getScreenTemplate() != null)
{
data.getUser().setTemp( "prev_template",
data.getTemplateInfo().getScreenTemplate()
.replace('/', ',') );
data.getTemplateInfo().setScreenTemplate(
JetspeedResources.getString(
TurbineConstants.TEMPLATE_INVALID_STATE) );
}
else
{
data.getUser().setTemp( "prev_screen",
data.getScreen().replace('/', ',') );
data.setScreen( JetspeedResources.getString(
TurbineConstants.SCREEN_INVALID_STATE) );
}
data.getUser().setTemp("prev_parameters", data.getParameters());
data.setAction( "" );
}
}
// we do not want to allow both a screen and template parameter.
// The template parameter is dominant.
if ( data.getTemplateInfo().getScreenTemplate() != null )
{
data.setScreen(null);
}
}
/**
* By default, this is true. It says that we require a new session
* in order to allow people to access the system. We accomplish
* this by doing a redirect and using the HttpSession spec.
*
* @param data Turbine information.
* @return True if we require a new session in order to allow
* people to access the system.
*/
public boolean requiresNewSession(RunData data)
{
return true;
}
}