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/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.faces.context;
import jakarta.faces.FacesException;
import jakarta.faces.FacesWrapper;
import jakarta.faces.lifecycle.Lifecycle;
/**
*
* FacesContextFactory is a
* factory object that creates (if needed) and returns new {@link FacesContext} instances, initialized for the
* processing of the specified request and response objects. Implementations may take advantage of the calls to the
* release() method of the allocated {@link FacesContext} instances to pool and recycle them, rather than
* creating a new instance every time.
*
*
*
* There must be one FacesContextFactory instance per web application that is utilizing Jakarta Server
* Faces. This instance can be acquired, in a portable manner, by calling:
*
*
*
* FacesContextFactory factory = (FacesContextFactory) FactoryFinder.getFactory(FactoryFinder.FACES_CONTEXT_FACTORY);
*
*
*
* Usage: extend this class and push the implementation being wrapped to the constructor and use {@link #getWrapped} to
* access the instance being wrapped.
*
*
*/
public abstract class FacesContextFactory implements FacesWrapper {
private FacesContextFactory wrapped;
/**
* @deprecated Use the other constructor taking the implementation being wrapped.
*/
@Deprecated
public FacesContextFactory() {
}
/**
*
* If this factory has been decorated, the implementation doing the decorating should push the implementation being
* wrapped to this constructor. The {@link #getWrapped()} will then return the implementation being wrapped.
*
*
* @param wrapped The implementation being wrapped.
*/
public FacesContextFactory(FacesContextFactory wrapped) {
this.wrapped = wrapped;
}
/**
*
* If this factory has been decorated, the implementation doing the decorating may override this method to provide
* access to the implementation being wrapped.
*
*
* @since 2.0
*/
@Override
public FacesContextFactory getWrapped() {
return wrapped;
}
/**
*
* Create (if needed) and return a {@link FacesContext}
* instance that is initialized for the processing of the specified request and response objects, utilizing the
* specified {@link Lifecycle} instance, for this web application.
*
*
*
* The implementation of this method must ensure that calls to the getCurrentInstance() method of
* {@link FacesContext}, from the same thread that called this method, will return the same {@link FacesContext}
* instance until the release() method is called on that instance.
*
*
*
* The implementation must call {@link ExternalContextFactory#getExternalContext} to produce the {@link ExternalContext}
* for the {@link FacesContext} instance.
*
*
*
* The default implementation must call {@link ExceptionHandlerFactory#getExceptionHandler} and make it so the return
* from that method is what gets returned from a call to {@link FacesContext#getExceptionHandler} on the returned
* FacesContext instance.
*
*
*
* The default implementation must call {@link jakarta.faces.lifecycle.ClientWindowFactory#getClientWindow} and make it
* so the return from that method is what gets returned from a call to {@link ExternalContext#getClientWindow()} on the
* returned ExternalContext instance.
*
*
* @param context In Jakarta Servlet environments, the ServletContext that is associated with this web
* application
* @param request In Jakarta Servlet environments, the ServletRequest that is to be processed
* @param response In Jakarta Servlet environments, the ServletResponse that is to be processed
* @param lifecycle The {@link Lifecycle} instance being used to process this request
*
* @return the instance of FacesContext.
*
* @throws FacesException if a {@link FacesContext} cannot be constructed for the specified parameters
* @throws NullPointerException if any of the parameters are null
*/
public abstract FacesContext getFacesContext(Object context, Object request, Object response, Lifecycle lifecycle) throws FacesException;
}