NoopCommandWrapper.hh

//********************************************************************
//*** ResourcePool/NoopCommandWrapper.hh
//*** Copyright (c) 2003-2008 by Markus Winand <mws@fatalmind.com>
//*** $Id: NoopCommandWrapper.hh,v 1.3 2008/02/27 18:28:46 mws Exp $
//********************************************************************
/*
This file is part of ResourcePool.

ResourcePool is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.

ResourcePool 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with ResourcePool; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307  USA */

#ifndef RESOURCEPOOL_NOOPCOMMANDWRAPPER_HH
#define RESOURCEPOOL_NOOPCOMMANDWRAPPER_HH

#include "mm/gc_ptr.hh"
#include "util/Clone.hh"

namespace fatalmind {

template<class CommandType>
class NoopCommandWrapper: public CommandType
{
    protected:
    private:
        gc_ptr<CommandType> m;

        NoopCommandWrapper(const NoopCommandWrapper& rho) 
        : CommandType(rho)
        , m(rho.m)
        {
        }
    public:
        NoopCommandWrapper(const CommandType& a_m) 
        : CommandType(a_m)
        , m(a_m.template clone<CommandType>())
        {
        };
        virtual ~NoopCommandWrapper() {
        }

        virtual void execute(typename CommandType::pool_type::resource_t& r) {
            // a real noop does not execute m :)
        }

        const CommandType& getCommandRef() const {
            return *m.get();
        }

        virtual void outputoperator(std::ostream& s) const {
            s << "NoopCommandWrapper["; 
            m->outputoperator(s);
            s << ']';
        }
    protected:
        virtual Clone* DoClone() const {
            return new NoopCommandWrapper(*this);
        }

}; // class NoopCommandWrapper

} // namespace fatalmind
#endif

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