MVATrainerLooperImpl.h

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#ifndef PhysicsTools_MVATrainer_MVATrainerLooperImpl_h
#define PhysicsTools_MVATrainer_MVATrainerLooperImpl_h

#include <string>
#include <memory>

#include "FWCore/Utilities/interface/Exception.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/ESProducts.h"

#include "PhysicsTools/MVATrainer/interface/MVATrainerLooper.h"
#include "PhysicsTools/MVATrainer/interface/MVATrainerContainer.h"

namespace PhysicsTools {

template<class Record_t>
class MVATrainerLooperImpl : public MVATrainerLooper {
    public:
    MVATrainerLooperImpl(const edm::ParameterSet &params) :
        MVATrainerLooper(params)
    {
        setWhatProduced(this, "trainer");
        addTrainer(new Trainer(params));
    }

    ~MVATrainerLooperImpl() override {}

    std::shared_ptr<Calibration::MVAComputer>
    produce(const Record_t &record)
    { return (*getTrainers().begin())->getCalibration(); }
};

template<class Record_t>
class MVATrainerContainerLooperImpl : public MVATrainerLooper {
    public:
    enum { kTrainer, kTrained };

    MVATrainerContainerLooperImpl(const edm::ParameterSet &params) :
        MVATrainerLooper(params)
    {
        setWhatProduced(this, edm::es::label("trainer", kTrainer)
                                            ("trained", kTrained));

        std::vector<edm::ParameterSet> trainers =
            params.getParameter<std::vector<edm::ParameterSet> >(
                                "trainers");

        for(std::vector<edm::ParameterSet>::const_iterator iter =
            trainers.begin(); iter != trainers.end(); iter++)

            addTrainer(new Trainer(*iter));
    }

    ~MVATrainerContainerLooperImpl() override {}

    edm::ESProducts<
        edm::es::L<Calibration::MVAComputerContainer, kTrainer>,
        edm::es::L<Calibration::MVAComputerContainer, kTrained> >
    produce(const Record_t &record)
    {
        std::shared_ptr<MVATrainerContainer> trainerCalib(
                        new MVATrainerContainer());
        TrainContainer trainedCalib;

        bool untrained = false;
        for(TrainerContainer::const_iterator iter =
                            getTrainers().begin();
            iter != getTrainers().end(); iter++) {
            Trainer *trainer = dynamic_cast<Trainer*>(*iter);
            TrainObject calib = trainer->getCalibration();

            trainerCalib->addTrainer(trainer->calibrationRecord,
                                     calib);
            if (calib) {
                untrained = true;
                continue;
            }

            if (!trainedCalib)
                trainedCalib = std::make_shared<PhysicsTools::Calibration::MVAComputerContainer>(
                    );

            trainedCalib->add(trainer->calibrationRecord) =
                *trainer->getTrainer()->getCalibration();
        }

        if (untrained)
            trainedCalib = TrainContainer(
                    new UntrainedMVAComputerContainer);

        edm::es::L<Calibration::MVAComputerContainer, kTrainer>
                        trainedESLabel(trainerCalib);

        return edm::es::products(trainedESLabel,
                                 edm::es::l<kTrained>(trainedCalib));
    }

    protected:
    class Trainer : public MVATrainerLooper::Trainer {
        public:
        Trainer(const edm::ParameterSet &params) :
            MVATrainerLooper::Trainer(params),
            calibrationRecord(params.getParameter<std::string>(
                        "calibrationRecord")) {}

        std::string calibrationRecord;
    };
};

} // namespace PhysicsTools

#endif // PhysicsTools_MVATrainer_MVATrainerLooperImpl_h