BCConstantPrior.h

#ifndef __BCCONSTANTPRIOR__H
#define __BCCONSTANTPRIOR__H

/*
 * Copyright (C) 2007-2018, the BAT core developer team
 * All rights reserved.
 *
 * For the licensing terms see doc/COPYING.
 * For documentation see http://mpp.mpg.de/bat
 */

// ---------------------------------------------------------

#include "BCPrior.h"

#include <limits>

class TF1;
class TRandom;

// ---------------------------------------------------------

class BCConstantPrior : public BCPrior
{
public:

    BCConstantPrior();

    BCConstantPrior(double range_width);

    BCConstantPrior(double xmin, double xmax);

    virtual ~BCConstantPrior() {};

    virtual BCPrior* Clone() const
    { return new BCConstantPrior(*this); }

    virtual double GetLogPrior(double /*x*/)
    { return -fLogRangeWidth; }

    virtual bool IsValid() const
    { return std::isfinite(fLogRangeWidth); }

    virtual double GetMode(double xmin = -std::numeric_limits<double>::infinity(), double xmax = std::numeric_limits<double>::infinity());

    virtual double GetRawMoment(unsigned n, double xmin = -std::numeric_limits<double>::infinity(), double xmax = std::numeric_limits<double>::infinity());

    virtual double GetIntegral(double xmin = -std::numeric_limits<double>::infinity(), double xmax = std::numeric_limits<double>::infinity())
    { (void)xmin; (void)xmax; return 1; }

    virtual double GetRandomValue(double xmin, double xmax, TRandom* const R = NULL);

protected:
    double fLogRangeWidth;

};

#endif