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ProcOptional.cc

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// -*- C++ -*-
//
// Package:     MVAComputer
// Class  :     ProcOptional
// 

// Implementation:
//     Variable processor to set empty input variables to a default value.
//
// Author:      Christophe Saout
// Created:     Sat Apr 24 15:18 CEST 2007
// $Id: ProcOptional.cc,v 1.3 2007/07/15 22:31:46 saout Exp $
//

#include "FWCore/Utilities/interface/Exception.h"

#include "PhysicsTools/MVAComputer/interface/VarProcessor.h"
#include "PhysicsTools/MVAComputer/interface/Calibration.h"

using namespace PhysicsTools;

namespace { // anonymous

class ProcOptional : public VarProcessor {
    public:
        typedef VarProcessor::Registry::Registry<ProcOptional,
                                        Calibration::ProcOptional> Registry;

        ProcOptional(const char *name,
                     const Calibration::ProcOptional *calib,
                     const MVAComputer *computer);
        virtual ~ProcOptional() {}

        virtual void configure(ConfIterator iter, unsigned int n);
        virtual void eval(ValueIterator iter, unsigned int n) const;

    private:
        std::vector<double>     neutralPos;
};

static ProcOptional::Registry registry("ProcOptional");

ProcOptional::ProcOptional(const char *name,
                          const Calibration::ProcOptional *calib,
                          const MVAComputer *computer) :
        VarProcessor(name, calib, computer),
        neutralPos(calib->neutralPos)
{
}

void ProcOptional::configure(ConfIterator iter, unsigned int n)
{
        if (n != neutralPos.size())
                return;

        while(iter)
                iter++(Variable::FLAG_OPTIONAL) << Variable::FLAG_NONE;
}

void ProcOptional::eval(ValueIterator iter, unsigned int n) const
{
        for(std::vector<double>::const_iterator pos = neutralPos.begin();
            pos != neutralPos.end(); pos++, ++iter) {
                switch(iter.size()) {
                    case 0:
                        iter(*pos);
                        break;
                    case 1:
                        iter(*iter);
                        break;
                    default:
                        throw cms::Exception("ProcOptionalError")
                                << "Multiple input variables encountered."
                                << std::endl;
                }
        }
}

} // anonymous namespace

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