LauAbsFitter.hh

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/*
Copyright 2013 University of Warwick

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

/*
Laura++ package authors:
John Back
Paul Harrison
Thomas Latham
*/

#ifndef LAU_ABS_FITTER
#define LAU_ABS_FITTER

#include <vector>

#include "Rtypes.h"
#include "TMatrixDfwd.h"

class LauFitObject;
class LauParameter;


class LauAbsFitter {

        public:
                struct FitStatus {
                        Int_t status;
                        Double_t NLL;
                        Double_t EDM;
                };

                virtual ~LauAbsFitter() {}


                virtual void initialise( LauFitObject* fitObj, const std::vector<LauParameter*>& parameters ) = 0;

                virtual LauFitObject* getFitObject() =0;

                virtual UInt_t nParameters() const = 0;

                virtual UInt_t nFreeParameters() const = 0;

                virtual Bool_t twoStageFit() const = 0;


                virtual void twoStageFit(Bool_t doTwoStageFit) = 0;

                virtual Bool_t useAsymmFitErrors() const = 0;


                virtual void useAsymmFitErrors(Bool_t useAsymmErrors) = 0;


                virtual const FitStatus& minimise() = 0;

                virtual void fixSecondStageParameters() = 0;

                virtual void releaseSecondStageParameters() = 0;

                virtual void updateParameters() = 0;

                virtual const TMatrixD& covarianceMatrix() const = 0;

        protected:
                LauAbsFitter() {}

        private:
                LauAbsFitter( const LauAbsFitter& );

                LauAbsFitter& operator=( const LauAbsFitter& rhs );

                ClassDef(LauAbsFitter,0);
};

#endif