Command.hh

//********************************************************************
//*** ResourcePool/Command.hh
//*** Copyright (c) 2003-2009 by Markus Winand <mws@fatalmind.com>
//*** $Id: Command.hh,v 1.22 2009-03-08 14:37:56 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_COMMAND_HH
#define RESOURCEPOOL_COMMAND_HH

#include "util/Clone.hh"

namespace fatalmind {

template<class PT>class ResourcePool; // Fwd decl

// helper for non-templated methods & data
// really required to make operator<< work properly

class NonTemplateCommand: public Clone {
    public:
        NonTemplateCommand();
        ~NonTemplateCommand();
    protected:
        bool topLevel() const {
            return _tl;
        }
        void topLevel(bool tl) {
            _tl = tl;
        }
    private:
        bool _tl;
        virtual void outputoperator(std::ostream&) const;

    template<class charT, class traits>
    friend 
        std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& s, const fatalmind::NonTemplateCommand& rho);
};

template<class PT>
class Command: public NonTemplateCommand {
    protected:
        Command() 
        : NonTemplateCommand()
        {
        };
    public:
        typedef PT pool_type;

        virtual ~Command() {
        }

        virtual void execute(typename PT::resource_t& rr) = 0;

    protected:
        const typename PT::factory_t& getFactory(const ResourcePool<PT>& p) const {
            return p.getFactory();
        }

    friend 
        class ResourcePool<PT>;
};

} // namespace fatalmind

template<class charT, class traits>
std::basic_ostream<charT, traits>& fatalmind::operator<<(std::basic_ostream<charT, traits>& s, const fatalmind::NonTemplateCommand& rho) {
    rho.outputoperator(s);
    return s;
}


#endif

---