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/*
 * Copyright (C) 2007-2013 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef BU_CACHE_CALC_H
#define BU_CACHE_CALC_H

#include "bu/trace.h"

#include <time.h>

namespace Bu
{
    template<class keytype, class obtype> class Cache;

    template<class keytype, class obtype>
    class CacheCalc
    {
    friend class Cache<keytype, obtype>;
    private:
        typedef Cache<keytype, obtype> MyCache;
    public:
        CacheCalc() :
            pCache( (MyCache *)0 )
        {
            TRACE();
        }

        virtual ~CacheCalc()
        {
            TRACE();
        }

        virtual void onLoad( obtype *pSrc, const keytype &key )=0;
        virtual void onUnload( obtype *pSrc, const keytype &key )=0;
        virtual void onDestroy( obtype *pSrc, const keytype &key )=0;
        virtual void onDestroy( const keytype &key )=0;
        virtual bool shouldSync( obtype *pSrc, const keytype &key,
            time_t tLastSync )=0;
        virtual void onTick() { };

    protected:
        MyCache *getCache()
        {
            TRACE();
            return pCache;
        }

    private:
        void setCache( MyCache *pCache )
        {
            TRACE();
            this->pCache = pCache;
        }

        MyCache *pCache;
    };
};

#endif