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SubjectInterface.hpp

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/*******************************************************************************
 * This file is part of openWNS (open Wireless Network Simulator)
 * _____________________________________________________________________________
 *
 * Copyright (C) 2004-2007
 * Chair of Communication Networks (ComNets)
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 * _____________________________________________________________________________
 *
 * openWNS is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 2 as published by the
 * Free Software Foundation;
 *
 * openWNS is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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#ifndef WNS_SUBJECTINTERFACE_HPP
#define WNS_SUBJECTINTERFACE_HPP

namespace wns {

    // We need to make Observer a friend of SubjectInterface
    template <class OBSERVERINTERFACE>
    class Observer;

    template <class OBSERVERINTERFACE>
    class SubjectInterface
    {
        friend class Observer<typename OBSERVERINTERFACE::NotificationType>;
    public:
        typedef OBSERVERINTERFACE ObserverType;

        typedef typename ObserverType::NotificationType NotificationType;

        virtual
        ~SubjectInterface()
        {
        }

    private:
        virtual void
        addObserver(ObserverType* observer) = 0;

        virtual void
        removeObserver(ObserverType* observer) = 0;
    };

}

#endif

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