/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.myfaces.context;
import java.lang.reflect.Field;
import javax.faces.FacesException;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.context.FacesContextFactory;
import javax.faces.lifecycle.Lifecycle;
import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.myfaces.context.servlet.FacesContextImpl;
import org.apache.myfaces.context.servlet.ServletExternalContextImpl;
/**
* DOCUMENT ME!
* @author Manfred Geiler (latest modification by $Author: lu4242 $)
* @version $Revision: 827879 $ $Date: 2009-10-20 23:10:03 -0400 (Tue, 20 Oct 2009) $
*/
public class FacesContextFactoryImpl
extends FacesContextFactory implements ReleaseableFacesContextFactory
{
private static final Log log = LogFactory.getLog(FacesContextFactoryImpl.class);
/**
* This var is assigned as the same as javax.faces.context.ExternalContext._firstInstance,
* and since it is a static reference and does not change, we can cache it here safely.
*/
private final ThreadLocal<ExternalContext> _firstExternalContextInstance;
@SuppressWarnings("unchecked")
public FacesContextFactoryImpl()
{
super();
ThreadLocal<ExternalContext> firstExternalContextInstance = null;
try
{
Field externalContextFirstInstance = ExternalContext.class.getDeclaredField("_firstInstance");
externalContextFirstInstance.setAccessible(true);
if (externalContextFirstInstance != null)
{
if (firstExternalContextInstance == null)
{
firstExternalContextInstance =
(ThreadLocal<ExternalContext>) externalContextFirstInstance.get(null);
}
}
}
catch (SecurityException e)
{
// It could happen, but we can ignore it.
if (log.isDebugEnabled())
log.debug("Cannot access private field _firstInstance from ExternalContext ",e);
}
catch (Exception e)
{
//It should not happen if we have only myfaces on classpath
if (log.isDebugEnabled())
log.debug("Cannot found private field _firstInstance from ExternalContext ",e);
}
_firstExternalContextInstance = firstExternalContextInstance;
}
public FacesContext getFacesContext(Object context,
Object request,
Object response,
Lifecycle lifecycle)
throws FacesException
{
if (context == null) {
throw new NullPointerException("context");
}
if (request == null) {
throw new NullPointerException("request");
}
if (response == null) {
throw new NullPointerException("response");
}
if (lifecycle == null) {
throw new NullPointerException("lifecycle");
}
FacesContext facesContext = null;
//We need this instance to be set later.
ReleaseableExternalContext externalContext = new ServletExternalContextImpl((ServletContext)context,
(ServletRequest) request, (ServletResponse) response);
// MyfacesGenericPortlet was replaced by jsr 301 portlet bridge,
// and the bundled inside myfaces 1.2 sources does not work because
// there was changes from 1.1 to 1.2 (viewhandler), so we
// can comment this code.
// Note all portlet code was removed in version 2.0, but it is
// not necessary to remove from this branch.
// else if (context instanceof PortletContext)
//{
// externalContext = new PortletExternalContextImpl(context,
// request, response);
//}
facesContext = new FacesContextImpl(externalContext,this);
if (facesContext != null)
{
if (_firstExternalContextInstance != null)
{
// Initialize the firstExternalContext that old jsf 1.1 of
// ExternalContext should fall when call jsf 1.2 methods.
_firstExternalContextInstance.set((ExternalContext) externalContext);
}
return facesContext;
}
throw new FacesException("Unsupported context type " + context.getClass().getName());
}
public void release()
{
if (_firstExternalContextInstance != null)
{
_firstExternalContextInstance.remove();
}
}
}