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;
// JetSpeed Classes
import org.apache.jetspeed.services.TemplateLocator;
// Turbine Classes
import org.apache.turbine.modules.NavigationLoader;
import org.apache.turbine.util.RunData;
import org.apache.turbine.services.template.TemplateService;
import org.apache.turbine.services.jsp.JspService;
import org.apache.turbine.services.TurbineServices;
// Jetspeed classes
import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
import org.apache.jetspeed.services.logging.JetspeedLogger;
/**
* Supporting class for the navigation tag.
* Includes a navigation JSP. If the respective tag parameter is set,
* different JSPs will be choosen, depending on whether the user has
* already logged in or not.
*
* @author <a href="mailto:ingo@raleigh.ibm.com">Ingo Schuster</a>
*/
public class NavigationTag extends TagSupport
{
/**
* Static initialization of the logger for this class
*/
private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(NavigationTag.class.getName());
/**
* defaultTemplate parameter defines the template whose contents will replace
* this tag in the layout if none of the special states are detected.
*/
private String defaultTemplate;
/**
* The setter for DefaultTemplate parameter
*/
public void setDefaultTemplate(String defaultTemplate)
{
this.defaultTemplate = defaultTemplate;
}
/**
* loggedInTemplate parameter defines the template whose contents will replace
* this tag in the layout if the user is already logged into the system.
*/
private String loggedInTemplate;
/**
* The setter for loggedInTemplate parameter
*/
public void setLoggedInTemplate(String loggedInTemplate)
{
this.loggedInTemplate = loggedInTemplate;
}
/**
* Method called when the tag is encountered to send the navigation
* template's contents to the output stream
*
* @return SKIP_BODY, as it is intended to be a single tag.
*/
public int doStartTag() throws JspException
{
String template = defaultTemplate;
String module = null;
RunData data = (RunData)pageContext.getAttribute(JspService.RUNDATA, PageContext.REQUEST_SCOPE);
try
{
/* LOGGED_IN */
if ( (data != null) && (data.getUser() != null) && data.getUser().hasLoggedIn() && (loggedInTemplate != null) )
template = loggedInTemplate;
data.getTemplateInfo().setNavigationTemplate(
TemplateLocator.locateNavigationTemplate(data,template));
pageContext.getOut().flush();
module = ((TemplateService)TurbineServices.getInstance().getService(
TemplateService.SERVICE_NAME)).getNavigationName(template);
NavigationLoader.getInstance().exec(data, module);
}
catch (Exception e)
{
String message = "Error processing navigation template:" + template + " using module: " + module;
logger.error(message, e);
try
{
data.getOut().print("Error processing navigation template: " + template + " using module: " + module);
}
catch(java.io.IOException ioe) {}
}
return SKIP_BODY;
}
}