LauParametricStepFuncPdf.hh

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// Copyright University of Warwick 2008 - 2013.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// Authors:
// Thomas Latham
// John Back
// Paul Harrison

/*****************************************************************************
 * Class based on RooFit/RooParametricStepFunction.                          *
 * Original copyright given below.                                           *
 *****************************************************************************
 * Authors:                                                                  *
 *   WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu       *
 *   DK, David Kirkby,    UC Irvine,         dkirkby@uci.edu                 *
 *                                                                           *
 * Copyright (c) 2000-2005, Regents of the University of California          *
 *                          and Stanford University. All rights reserved.    *
 *                                                                           *
 * Redistribution and use in source and binary forms,                        *
 * with or without modification, are permitted according to the terms        *
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)             *
 *****************************************************************************/


#ifndef LAU_PAR_STEP_FUNC_PDF
#define LAU_PAR_STEP_FUNC_PDF

#include <vector>

#include "TString.h"

#include "LauAbsPdf.hh"

class LauParameter;


class LauParametricStepFuncPdf : public LauAbsPdf {

        public:
                enum NormBin {
                        First, 
                        Last   
                };
                

                LauParametricStepFuncPdf(const TString& theVarName, const std::vector<LauParameter*>& params, const std::vector<Double_t>& limits, NormBin normalisationBin = Last);

                virtual ~LauParametricStepFuncPdf();

                LauParametricStepFuncPdf(const LauParametricStepFuncPdf& other);


                virtual void calcLikelihoodInfo(const LauAbscissas& abscissas);
                
                using LauAbsPdf::calcLikelihoodInfo;

                virtual void checkPositiveness() {}; // Nothing to check here.

                virtual void calcNorm();
                

                virtual void calcPDFHeight( const LauKinematics* kinematics );

        protected:

                UInt_t nBins() const {return limits_.size()-1;}


                NormBin normBin() const {return normBin_;}

        private:
                NormBin normBin_;
                std::vector<Double_t> limits_;

                ClassDef(LauParametricStepFuncPdf,0) // Define the PSF PDF
};

#endif