-/* $Id: filter.hpp,v 1.4 2005-10-15 14:09:09 adam Exp $
+/* $Id: filter.hpp,v 1.5 2005-10-16 16:05:44 adam Exp $
Copyright (c) 2005, Index Data.
%LICENSE%
virtual ~Base(){};
///sends Package off to next Filter, returns altered Package
- virtual void process(Package & package) const {
- };
- virtual void configure(){};
+ virtual void process(Package & package) const = 0;
+
+ virtual void configure(){};
/// get function - right val in assignment
std::string name() const {