package org.apache.jetspeed.services.jsp.tags;
/*
* Copyright 2000-2004 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.
*/
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.TagSupport;
// Turbine Classes
import org.apache.turbine.modules.ScreenLoader;
import org.apache.turbine.util.RunData;
import org.apache.turbine.services.jsp.JspService;
import org.apache.turbine.services.resources.TurbineResources;
import org.apache.ecs.ConcreteElement;
// Jetspeed classes
import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
import org.apache.jetspeed.services.logging.JetspeedLogger;
/**
* Supporting class for the ecsscreen tag.
* Sends the screens ecs element's content to the output stream.
* RunData's screen value is expected to be set!
*
* @author <a href="mailto:ingo@raleigh.ibm.com">Ingo Schuster</a>
* @version $Id: EcsScreenTag.java,v 1.12 2004/02/23 03:59:40 jford Exp $
*/
public class EcsScreenTag extends TagSupport
{
/**
* Static initialization of the logger for this class
*/
private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(EcsScreenTag.class.getName());
/**
* Method called when the tag is encountered to send attributes to the
* output stream
*
* @return SKIP_BODY, as it is intended to be a single tag.
*/
public int doStartTag() throws JspException
{
RunData data = (RunData)pageContext.getAttribute(JspService.RUNDATA, PageContext.REQUEST_SCOPE);
String screenName = data.getScreen();
// make sure that not the BaseJspScreen is called
// as this would result in an endless loop...
if ( screenName.equals( "BaseJspScreen" ) )
{
screenName = TurbineResources.getString("screen.homepage");
}
try
{
pageContext.getOut().flush();
ConcreteElement screenElement = ScreenLoader.getInstance().eval( data, screenName );
// Check whether this is an "old" screen (that returns a ConcreteElement)
// or a "new" one that returns null.
if ( screenElement != null )
{
//The ECS element must serialize in the character encoding
// of the response
screenElement.setCodeSet( data.getResponse().getCharacterEncoding() );
screenElement.output( data.getResponse().getWriter() );
}
}
catch (Exception e)
{
String message = "Error processing ecs screen '" + screenName + "'.";
logger.error(message, e);
try
{
data.getOut().print("Error processing ecs screen '" + screenName + "'. See log for more information.");
}
catch(java.io.IOException ioe) {}
}
return SKIP_BODY;
}
}