ErrorCovariance.h

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/*
 * (C) Copyright 2017-2020 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 FV3JEDI_ERRORCOVARIANCE_ERRORCOVARIANCE_H_
#define FV3JEDI_ERRORCOVARIANCE_ERRORCOVARIANCE_H_
 
#include <memory>
#include <ostream>
#include <string>
 
#include "eckit/config/Configuration.h"
#include "eckit/memory/NonCopyable.h"
 
#include "oops/util/DateTime.h"
#include "oops/util/ObjectCounter.h"
#include "oops/util/Printable.h"
 
#include "fv3jedi/Geometry/Geometry.h"
 
// Forward declarations
namespace oops {
  class Variables;
}
 
namespace fv3jedi {
  class Increment;
  class State;
 
// -------------------------------------------------------------------------------------------------
class ErrorCovariance : public util::Printable, private eckit::NonCopyable,
                        private util::ObjectCounter<ErrorCovariance> {
 public:
  static const std::string classname() {return "fv3jedi::ErrorCovariance";}
 
  ErrorCovariance(const Geometry &, const oops::Variables &, const eckit::Configuration &,
                  const State &, const State &);
  ~ErrorCovariance();
 
  void linearize(const State &, const Geometry &);
  void multiply(const Increment &, Increment &) const;
  void inverseMultiply(const Increment &, Increment &) const;
  void randomize(Increment &) const;
 
 private:
  void print(std::ostream & os) const {os << "ErrorCovariance::print not implemented";}
};
// -------------------------------------------------------------------------------------------------
 
}  // namespace fv3jedi
#endif  // FV3JEDI_ERRORCOVARIANCE_ERRORCOVARIANCE_H_