ObsIteratorQG.h

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/*
 * (C) Copyright 2021 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 QG_MODEL_OBSITERATORQG_H_
#define QG_MODEL_OBSITERATORQG_H_
 
#include <iterator>
#include <memory>
#include <string>
 
#include "eckit/geometry/Point2.h"
 
#include "model/LocationsQG.h"
 
#include "oops/util/ObjectCounter.h"
#include "oops/util/Printable.h"
 
namespace qg {
 
/// Iterator over all observations
class ObsIteratorQG: public std::iterator<std::forward_iterator_tag,
                                       eckit::geometry::Point2>,
                   public util::Printable,
                   private util::ObjectCounter<ObsIteratorQG> {
 public:
  static const std::string classname() {return "qg::ObsIteratorQG";}
 
  ObsIteratorQG(const ObsIteratorQG &);
  ObsIteratorQG(const LocationsQG &, int);
 
  bool operator==(const ObsIteratorQG &) const;
  bool operator!=(const ObsIteratorQG &) const;
 
  /// return location of current observation
  eckit::geometry::Point2 operator*() const;
 
  ObsIteratorQG& operator++();
 
 private:
  void print(std::ostream & os) const override {os << index_;}
 
  /// index of a current observation
  int index_;
  /// atlas field of the lons and lats
  atlas::Field locslonlat_;
};
 
}  // namespace qg
 
#endif  // QG_MODEL_OBSITERATORQG_H_