FittingAlgorithm.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2019 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include <functional>
#include <memory>
#include <vector>

#include "ACTFW/EventData/SimSourceLink.hpp"
#include "ACTFW/EventData/Track.hpp"
#include "ACTFW/Framework/BareAlgorithm.hpp"
#include "ACTFW/Plugins/BField/BFieldOptions.hpp"
#include "Acts/Fitter/KalmanFitter.hpp"
#include "Acts/Geometry/TrackingGeometry.hpp"

namespace FW {

class FittingAlgorithm final : public BareAlgorithm {
 public:
  using FitterResult = Acts::Result<Acts::KalmanFitterResult<SimSourceLink>>;
  using FitterFunction = std::function<FitterResult(
      const std::vector<SimSourceLink>&, const TrackParameters&,
      const Acts::KalmanFitterOptions<Acts::VoidOutlierFinder>&)>;

  static FitterFunction makeFitterFunction(
      std::shared_ptr<const Acts::TrackingGeometry> trackingGeometry,
      Options::BFieldVariant magneticField, Acts::Logging::Level lvl);

  struct Config {
    std::string inputSourceLinks;
    std::string inputProtoTracks;
    std::string inputInitialTrackParameters;
    std::string outputTrajectories;
    FitterFunction fit;
  };

  FittingAlgorithm(Config cfg, Acts::Logging::Level lvl);

  FW::ProcessCode execute(const FW::AlgorithmContext& ctx) const final override;

 private:
  Config m_cfg;
};

}  // namespace FW