MCInterface.h

#if !defined(__MCINTERFACE_H_)
#define __MCINTERFACE_H_

#ident "@(#)$Id: MCInterface.h,v 1.6 2004/12/02 07:05:20 mike Exp $"

/*
 * Copyright Miba Consulting Ltd. (c) 2000-2003
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include "mcllib/MCRefCount.h"
#include "mcllib/MCTypes.h"
#include "mcllib/MCVariant.h"

namespace mcllib
{
    typedef mcuint64 MCIID;

    class MCInterface : public MCRefCount
    {
    public:
        virtual ~MCInterface();
        virtual bool isa(const MCIID& iid) const = 0;
        const MCInterface* getInterface(const MCIID& iid) const;
        MCInterface* getInterface(const MCIID& iid);

        // Registration (static) methods
        static const MCIID& getInterfaceId(const MCString& name);
        static const MCString& getInterfaceName(const MCIID& iid);
        static MCInterface* getInterface(const MCIID& iid,
            const MCVariantType& vt);
        static void registerName(const MCString& name, const MCIID& iid);
        static void registerInterface(const MCIID& iid, const MCVariantType& vt,
            MCInterface* pInterface);
    };

    class MCIMgrBase
    {
    protected:
        MCIMgrBase(MCInterface* pInterface, const MCIID& iid);
        MCIMgrBase(const MCIMgrBase& mgr, const MCIID& iid);
        MCIMgrBase(const MCIMgrBase& mgr);
        MCIMgrBase& operator=(const MCIMgrBase& mgr);
        ~MCIMgrBase();
        static void checkPtr(const char* msg, const void* ptr);

        MCInterface* m_pInterface;
        MCIID m_iid;
    };

    template<class T>
    class MCIMgr : public MCIMgrBase
    {
    public:
        MCIMgr()
            : MCIMgrBase(0, 0)
        {
            // Do not attempt to use one unless you have assigned to it
        }

        MCIMgr(T* pT, const MCIID& iid)
            : MCIMgrBase(pT, iid)
        {
            // Construction checks that pT->isa(iid)
        }

        MCIMgr(const MCIMgrBase& imgr, const MCIID& iid)
            : MCIMgrBase(imgr, iid)
        {
            // Construction checks that pT->isa(iid)
        }

        inline const T* operator->() const
        {
            return((const T*)m_pInterface);
        }

        inline T* operator->()
        {
            return((T*)m_pInterface);
        }

    };
};

#endif

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