mapper.hpp

/*
  ANCH Framework: ANother C++ Hack is a C++ framework based on C++11 standard
  Copyright (C) 2020 Vincent Lachenal
 
  This file is part of ANCH Framework.
 
  ANCH Framework is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
 
  ANCH Framework 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 Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public License
  along with ANCH Framework.  If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
 
#include <string>
#include <vector>
#include <map>
#include <ostream>
#include <istream>
#include <functional>
#include <map>
 
#include "json/genericMapper.hpp"
#include "json/mappingOptions.hpp"
 
 
namespace anch::json {
 
  // JSON mapper early declaration
  template<typename T>
  class ObjectMapper;
 
  // JSON mapper early declaration
  template<typename T>
  class Factory;

  template<typename T>
  void registerObject(ObjectMapper<T>& mapper);

   template<typename T>
   using SerializeFn = std::function<void(const T&, std::ostream&, const anch::json::MappingOptions&)>;

   template<typename T>
   using DeserializeFn = std::function<bool(T&, anch::json::ReaderContext&)>;

  template<typename T>
  class ObjectMapper: public anch::json::GenericMapper<ObjectMapper<T>, T> {
    friend anch::json::Factory<T>;
    template<typename U>
    friend void anch::json::registerObject(ObjectMapper<U>&);
 
    // Attributes +
  private:
    std::vector<std::function<bool((const T&, anch::json::WriterContext&))>> _writers;

    std::map<std::string, anch::json::DeserializeFn<T>> _readers;
    // Attributes -
 
    // Constructors +
  private:
    ObjectMapper();
 
  public:
    ObjectMapper(const ObjectMapper& other) = delete;

    ObjectMapper(ObjectMapper&& other) = delete;
    // Constructors -
 
  private:
    // Destructors +
    virtual ~ObjectMapper();
    // Destructors -
 
    // Methods +
  public:
    void serializeValue(const T& value, anch::json::WriterContext& context) const;

    bool deserializeValue(T& value, anch::json::ReaderContext& context) const;
 
  private:
    template<typename P>
    ObjectMapper<T>& registerField(const std::string& key, P T::* value);

    template<typename MT, typename P>
    ObjectMapper<T>& registerField(const std::string& key, P T::* value);

    template<typename P, typename MT = P>
    ObjectMapper<T>& registerField(const std::string& key, std::function<P(const T&)> getter);

    template<typename P, typename MT = P>
    ObjectMapper<T>& registerField(const std::string& key, std::function<void(T&, const P&)> setter);

    template<typename P, typename MT = P>
    ObjectMapper<T>& registerField(const std::string& key, std::function<P(const T&)> getter, std::function<void(T&, const P&)> setter);
    // Methods -
 
  };
 
}  // anch::json
 
#include "json/impl/mapper.hpp"