CORBA::Filter class is the common superclass of all
filter objects. Since all filter objects are CORBA objects,
the Filter class inherits from the CORBA::Object
class. Filter class gives concrete implementations of the
following methods:
enable: enables a particular filter method, passed as
argument.
disable: disables a particular filter
method, passed as argument.
upfilter: maps a filter
method as an upfilter to a server method.
downfilter: maps a filter method as a
downfilter to a server method.
setPass: to be
used by the filter developer in case of a pass action.
setBounce: to be used by the filter developer in case
of a bounce action.