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NullCommand.hpp

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 * This file is part of openWNS (open Wireless Network Simulator)
 * _____________________________________________________________________________
 *
 * Copyright (C) 2004-2007
 * Chair of Communication Networks (ComNets)
 * Kopernikusstr. 16, D-52074 Aachen, Germany
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 * fax: ++49-241-80-22242
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 * www: http://www.openwns.org
 * _____________________________________________________________________________
 *
 * 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
 * details.
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#ifndef WNS_EVENTS_SCHEDULER_NULLCOMMAND_HPP
#define WNS_EVENTS_SCHEDULER_NULLCOMMAND_HPP

#include <WNS/events/scheduler/ICommand.hpp>

namespace wns { namespace events { namespace scheduler {

    class NullCommand :
        public ICommand
    {
    public:
        virtual bool
        isNotSubmitted() const
        {
            return true;
        }

        virtual bool
        isQueued() const
        {
            return false;
        }

        virtual bool
        isRunning() const
        {
            return false;
        }

        virtual bool
        isFinished() const
        {
            return false;
        }

        virtual bool
        isCanceled() const
        {
            return false;
        }
    };

    inline ICommandPtr
    makeNullCommand()
    {
        return ICommandPtr(new NullCommand());
    }

}
}
}
#endif // NOT defined WNS_EVENTS_SCHEDULER_NULLCOMMAND_HPP

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