walker.h

#ifndef MEANWALKER_WALKER_H

#define MEANWALKER_WALKER_H

#include "meanwalkerconfig.h"
#include "function.h"
#include <errut/errorbase.h>

namespace meanwalker
{

class RandomNumberGenerator;

class Walker : public errut::ErrorBase
{
public:
        Walker(RandomNumberGenerator *pRng);
        ~Walker();

        void setProbabilityFunction(Function *pProbFunction)                                            { m_pProbFunction = pProbFunction; }

        virtual size_t getDimension() const                                                             { if (m_pProbFunction) return m_pProbFunction->getDimension(); return 0; }

        virtual void walk(size_t numSteps) = 0;

        virtual const double *getBestCoordinates() const                                                { return 0; }
protected:
        virtual void onNewSample(double functionValue, const double *pCoords)                           { }

        RandomNumberGenerator *getRandomNumberGenerator()                                               { return m_pRndGen; }
        Function *getProbabilityFunction()                                                              { return m_pProbFunction; }
private:
        RandomNumberGenerator * const m_pRndGen;
        Function *m_pProbFunction;
};

} // end namespace   


#endif // MEANWALKER_WALKER_H