package org.apache.turbine.modules.navigations;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 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/>.
*/
// Turbine/Village/ECS Imports
import org.apache.ecs.ConcreteElement;
import org.apache.ecs.StringElement;
import org.apache.turbine.util.RunData;
import org.apache.turbine.services.velocity.TurbineVelocity;
// Velocity Stuff
import org.apache.velocity.context.Context;
/**
* VelocityNavigation. This screen relies on the VelocityPage
* being set as the default page. The doBuildTemplate() assumes the
* user has put the template filename in the RunData parameter and set
* it to the value of the template file to execute. Specialized
* Navigations screens should extend this class and overide the
* doBuildTemplate( data , context) method.
*
* @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
* @version $Id: VelocityNavigation.java,v 1.1.1.1 2001/08/16 05:08:35 jvanzyl Exp $
*/
public class VelocityNavigation extends TemplateNavigation
{
/**
* Velocity Navigations extending this class should overide this
* method to perform any particular business logic and add
* information to the context.
*
* @param data Turbine information.
* @param context Context for web pages.
* @exception Exception, a generic exception.
*/
protected void doBuildTemplate( RunData data,
Context context )
throws Exception
{
}
/**
* Needs to be implemented to make TemplateNavigation like us.
* The actual method that you should override is the one with the
* context in the parameter list.
*
* @param data Turbine information.
* @exception Exception, a generic exception.
*/
protected void doBuildTemplate( RunData data )
throws Exception
{
doBuildTemplate( data, TurbineVelocity.getContext(data) );
}
/**
* This Builds the Velocity template.
*
* @param data Turbine information.
* @return A ConcreteElement.
* @exception Exception, a generic exception.
*/
public ConcreteElement buildTemplate( RunData data )
throws Exception
{
Context context = TurbineVelocity.getContext( data );
String templateName = data.getTemplateInfo().getNavigationTemplate();
StringElement output = new StringElement();
output.setFilterState(false);
// Usually adds the leading slash, but make it sure.
if ((templateName.length() > 0) &&
(templateName.charAt(0) != '/'))
{
templateName = '/' + templateName;
}
output.addElement( TurbineVelocity
.handleRequest(context,"navigations" + templateName) );
return output;
}
}