java.lang.Object
   javax.faces.context.FacesContextFactory

FacesContextFactory is a factory object that creates (if needed) and returns new 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 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 JavaServer Faces. This instance can be acquired, in a portable manner, by calling:

FacesContextFactory factory = (FacesContextFactory)
FactoryFinder.getFactory(FactoryFinder.FACES_CONTEXT_FACTORY);

 abstract public FacesContext getFacesContext(Object context,
    Object request,
    Object response,
    Lifecycle lifecycle) throws FacesException
Create (if needed) and return a FacesContext  instance
that is initialized for the processing of the specified request
and response objects, utilizing the specified Lifecycle 
instance, for this web application.

The implementation of this method must ensure that calls to the
getCurrentInstance() method of FacesContext ,
from the same thread that called this method, will return the same
FacesContext  instance until the release()
method is called on that instance.