artis-star/src/artis-star/common/state/Any.hpp

/**
 * @file common/Any.hpp
 * @author The ARTIS Development Team
 * See the AUTHORS or Authors.txt file
 */

/*
 * ARTIS - the multimodeling and simulation environment
 * This file is a part of the ARTIS environment
 *
 * Copyright (C) 2013-2022 ULCO http://www.univ-littoral.fr
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef COMMON_STATE_ANY_HPP
#define COMMON_STATE_ANY_HPP

#include "artis-star/common/event/Value.hpp"

#include <string>
#include <tuple>
#include <utility>
#include <vector>

namespace artis::common::state {

class Any {
private:
  struct base {
    virtual ~base() {}

    virtual base *clone() const = 0;
  };

  template<typename T, typename V>
  struct data : base {
    data(V T::* const &value)
      : value_(value) {}

    base *clone() const { return new data<T, V>(*this); }

    V T::* value_;
  };

  base *ptr_;

public:
  Any()
    : ptr_(nullptr) {}

  template<typename T, typename V>
  Any(V T::* const &value)
    : ptr_(new data<T, V>(value)) {}

  Any(Any const &other)
    : ptr_(other.ptr_ ? other.ptr_->clone() : nullptr) {}

  virtual ~Any() {
    if (ptr_) {
      delete ptr_;
    }
  }

  void operator=(Any const &other) { Any(other).swap(*this); }

  void swap(Any &other) { std::swap(ptr_, other.ptr_); }

  template<typename T, typename V>
  V T::* get() const { return dynamic_cast < data<T, V> * >(ptr_)->value_; }

  template<typename T, typename V>
  void get(T *o, V &value) const {
    data<T, V> *q = dynamic_cast < data<T, V> * >(ptr_);

    if (q) {
      value = o->*(q->value_);
    } else {
      assert(false);
    }
  }

  bool is_null() const { return ptr_ == nullptr; }

  template<typename T, typename V>
  void put(T *o, const V &value) {
    V T::* p = dynamic_cast <data<T, V> * >(ptr_)->value_;
    o->*(p) = value;
  }

  template<typename T>
  void restore(T *o, const common::event::Value &value) {
    if (value.is_type<double>()) {
      double v;

      value(v);
      put(o, v);
    } else if (value.is_type<unsigned int>()) {
      unsigned int v;

      value(v);
      put(o, v);
    } else if (value.is_type<int>()) {
      int v;

      value(v);
      put(o, v);
    } else if (value.is_type<bool>()) {
      bool v;

      value(v);
      put(o, v);
    } else if (value.is_type < std::vector < double > > ()) {
      std::vector<double> v;

      value(v);
      put(o, v);
    } else if (value.is_type < std::vector < unsigned int > > ()) {
      std::vector<unsigned int> v;

      value(v);
      put(o, v);
    } else if (value.is_type < std::vector < int > > ()) {
      std::vector<int> v;

      value(v);
      put(o, v);
    } else if (value.is_type < std::vector < bool > > ()) {
      std::vector<bool> v;

      value(v);
      put(o, v);
    } else {
      assert(false);
    }
  }

  template<typename T>
  common::event::Value save(const T *o) const {
    if (ptr_) {
      data<T, double> *q_double =
        dynamic_cast < data<T, double> * >(ptr_);

      if (q_double) {
        return common::event::Value(o->*(q_double->value_));
      } else {
        data<T, unsigned int> *q_uint =
          dynamic_cast < data<T, unsigned int> * >(ptr_);

        if (q_uint) {
          return common::event::Value(o->*(q_uint->value_));
        } else {
          data<T, int> *q_int =
            dynamic_cast < data<T, int> * >(ptr_);

          if (q_int) {
            return common::event::Value(o->*(q_int->value_));
          } else {
            data<T, bool> *q_bool =
              dynamic_cast < data<T, bool> * >(ptr_);

            if (q_bool) {
              return common::event::Value(o->*(q_bool->value_));
            } else {
              data<T, std::vector < double> > *q_double_v =
                dynamic_cast < data<T, std::vector < double> > * > (ptr_);

              if (q_double_v) {
                return common::event::Value(o->*(q_double_v->value_));
              } else {
                data<T, std::vector < int> > *q_int_v =
                  dynamic_cast < data<T, std::vector < int> > * > (ptr_);

                if (q_int_v) {
                  return common::event::Value(o->*(q_int_v->value_));
                } else {
                  data<T, std::vector < bool> > *q_bool_v =
                    dynamic_cast < data<T, std::vector < bool> > * > (ptr_);

                  if (q_bool_v) {
                    return common::event::Value(o->*(q_bool_v->value_));
                  }
                }
              }
            }
          }
        }
      }
    }
    assert(false);
    return common::event::Value();
  }

  template<typename T>
  std::string to_string(const T *o) const {
    if (ptr_) {
      data<T, double> *q_double =
        dynamic_cast < data<T, double> * >(ptr_);

      if (q_double) {
        return std::to_string(o->*(q_double->value_));
      } else {
        data<T, unsigned int> *q_uint =
          dynamic_cast < data<T, unsigned int> * >(ptr_);

        if (q_uint) {
          return std::to_string(o->*(q_uint->value_));
        } else {
          data<T, int> *q_int =
            dynamic_cast < data<T, int> * >(ptr_);

          if (q_int) {
            return std::to_string(o->*(q_int->value_));
          } else {
            data<T, bool> *q_bool =
              dynamic_cast < data<T, bool> * >(ptr_);

            if (q_bool) {
              return o->*(q_bool->value_) ? "true" : "false";
            } else {
              data<T, std::vector < double> > *q_double_v =
                dynamic_cast < data<T, std::vector <
                                       double> > * > (ptr_);

              if (q_double_v) {
                return "";
              } else {
                data<T, std::vector < int> > *q_int_v =
                  dynamic_cast < data<T, std::vector <
                                         int> > * > (ptr_);

                if (q_int_v) {
                  return "";
                } else {
                  data<T, std::vector < bool> > *q_bool_v =
                    dynamic_cast < data<T, std::vector <
                                           bool> > * > (ptr_);

                  if (q_bool_v) {
                    return "";
                  } else {
                    return "NA";
                  }
                }
              }
            }
          }
        }
      }
    } else {
      return "NA";
    }
  }
};

}

#endif