Thinning.h

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/*
 * (C) Copyright 2019 UCAR
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 */
 
#ifndef UFO_FILTERS_THINNING_H_
#define UFO_FILTERS_THINNING_H_
 
#include <memory>
#include <ostream>
#include <string>
#include <vector>
 
#include "ioda/ObsDataVector.h"
#include "oops/util/ObjectCounter.h"
#include "ufo/filters/FilterBase.h"
#include "ufo/filters/QCflags.h"
 
namespace eckit {
  class Configuration;
}
 
namespace ioda {
  template <typename DATATYPE> class ObsDataVector;
  class ObsSpace;
}
 
namespace ufo {
 
/// Thinning: randomly thin a given percentage of observations
 
class Thinning : public FilterBase,
                 private util::ObjectCounter<Thinning> {
 public:
  static const std::string classname() {return "ufo::Thinning";}
 
  Thinning(ioda::ObsSpace &, const eckit::Configuration &,
           std::shared_ptr<ioda::ObsDataVector<int> >,
           std::shared_ptr<ioda::ObsDataVector<float> >);
  ~Thinning();
 
 private:
  void print(std::ostream &) const override;
  void applyFilter(const std::vector<bool> &, const Variables &,
                   std::vector<std::vector<bool>> &) const override;
  int qcFlag() const override {return QCflags::thinned;}
};
 
}  // namespace ufo
 
#endif  // UFO_FILTERS_THINNING_H_