| Handle an exception that occured during the context of the current flow
execution request.
This implementation iterates over the ordered set of exception handler
objects, delegating to each handler in the set until one handles the
exception that occured and selects a non-null error view.
Parameters: exception - the exception that occured Parameters: context - the flow execution control context the selected error view, or null if no handlermatched or returned a non-null view selection |