C:/dev/de/differentialevolution/termination_strategy.hpp

/*
 * Copyright (c) 2011 Adrian Michel
 * http://www.amichel.com
 *
 * Permission to use, copy, modify, distribute and sell this 
 * software and its documentation for any purpose is hereby 
 * granted without fee, provided that both the above copyright 
 * notice and this permission notice appear in all copies and in 
 * the supporting documentation. 
 *  
 * This library is distributed in the hope that it will be 
 * useful. However, Adrian Michel makes no representations about
 * the suitability of this software for any purpose.  It is 
 * provided "as is" without any express or implied warranty. 
 * 
 * Should you find this library useful, please email 
 * info@amichel.com with a link or other reference 
 * to your work. 
*/

#ifndef DE_TERMINATION_STRATEGY_HPP_INCLUDED
#define DE_TERMINATION_STRATEGY_HPP_INCLUDED

// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)
#pragma once
#endif

namespace de
{

class termination_strategy
{
public:
        virtual ~termination_strategy(){}

        virtual bool event( individual_ptr best, size_t genCount ) = 0;
};

typedef boost::shared_ptr< termination_strategy > termination_strategy_ptr;

class max_gen_termination_strategy : public termination_strategy
{
private:
        const size_t m_maxGen;
public:
        max_gen_termination_strategy( size_t maxGen )
                : m_maxGen( maxGen )
        {
        }

        virtual bool event( individual_ptr best, size_t genCount )
        {
                return genCount < m_maxGen;
        }
};

}

#endif //DE_TERMINATION_STRATEGY_HPP_INCLUDED