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// Copyright 2017 Daniel Parker
// Distributed under the Boost license, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// See https://github.com/danielaparker/jsoncons for latest version
#ifndef JSONCONS_SERIALIZATION_TRAITS_HPP
#define JSONCONS_SERIALIZATION_TRAITS_HPP
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch"
#endif
#include <iostream>
#include <string>
#include <tuple>
#include <array>
#include <type_traits>
#include <memory>
#include <jsoncons/json_output_handler.hpp>
#include <jsoncons/serialization_options.hpp>
#include <jsoncons/json_serializer.hpp>
#include <jsoncons/jsoncons_utilities.hpp>
namespace jsoncons {
// serialization_traits
template <class T, class Enable = void>
struct serialization_traits
{
template <class CharT>
static void encode(const T&, basic_json_output_handler<CharT>&)
{
}
};
// dump
template <class CharT, class T>
void dump(const T& val, basic_json_output_handler<CharT>& handler)
{
handler.begin_json();
serialization_traits<T>::encode(val,handler);
handler.end_json();
}
#if !defined(JSONCONS_NO_DEPRECATED)
template <class CharT, class T>
void dump_body(const T& val, basic_json_output_handler<CharT>& handler)
{
dump_fragment(val,handler);
}
#endif
template <class CharT, class T>
void dump_fragment(const T& val, basic_json_output_handler<CharT>& handler)
{
serialization_traits<T>::encode(val,handler);
}
template <class CharT, class T>
void dump(const T& val, std::basic_ostream<CharT>& os)
{
basic_json_serializer<CharT> serializer(os);
dump(val, serializer);
}
template <class CharT, class T>
void dump(const T& val, const basic_serialization_options<CharT>& options,
std::basic_ostream<CharT>& os)
{
basic_json_serializer<CharT> serializer(os, options);
dump(val, serializer);
}
template <class CharT, class T>
void dump(const T& val, std::basic_ostream<CharT>& os, bool pprint)
{
basic_json_serializer<CharT> serializer(os, pprint);
dump(val, serializer);
}
template <class CharT, class T>
void dump(const T& val, const basic_serialization_options<CharT>& options,
std::basic_ostream<CharT>& os, bool pprint)
{
basic_json_serializer<CharT> serializer(os, options, pprint);
dump(val, serializer);
}
// integer
template<class T>
struct serialization_traits<T,
typename std::enable_if<detail::is_integer_like<T>::value
>::type>
{
template <class CharT>
static void encode(T val, basic_json_output_handler<CharT>& handler)
{
handler.integer_value(val);
}
};
// uinteger
template<class T>
struct serialization_traits<T,
typename std::enable_if<detail::is_uinteger_like<T>::value
>::type>
{
template <class CharT>
static void encode(T val, basic_json_output_handler<CharT>& handler)
{
handler.uinteger_value(val);
}
};
// double
template<class T>
struct serialization_traits<T,
typename std::enable_if<detail::is_floating_point_like<T>::value
>::type>
{
template <class CharT>
static void encode(T val, basic_json_output_handler<CharT>& handler)
{
handler.double_value(val);
}
};
// bool
template<>
struct serialization_traits<bool>
{
template <class CharT>
static void encode(bool val, basic_json_output_handler<CharT>& handler)
{
handler.bool_value(val);
}
};
// string
template<class T>
struct serialization_traits<T,
typename std::enable_if<detail::is_string_like<T>::value
>::type>
{
template <class CharT>
static void encode(const T& val, basic_json_output_handler<CharT>& handler)
{
handler.string_value(val);
}
};
/*template<>
struct serialization_traits<typename type_wrapper<CharT>::const_pointer_type>
{
template <class CharT>
static void encode(typename type_wrapper<CharT>::const_pointer_type val, basic_json_output_handler<CharT>& handler)
{
handler.string_value(val);
}
};*/
// sequence container (except string and array)
template<class T>
struct serialization_traits<T,
typename std::enable_if<detail::is_vector_like<T>::value
>::type>
{
typedef typename std::iterator_traits<typename T::iterator>::value_type value_type;
template <class CharT>
static void encode(const T& val, basic_json_output_handler<CharT>& handler)
{
handler.begin_array();
for (auto it = std::begin(val); it != std::end(val); ++it)
{
serialization_traits<value_type>::encode(*it,handler);
}
handler.end_array();
}
};
// std::array
template<class T, size_t N>
struct serialization_traits<std::array<T,N>>
{
typedef typename std::array<T,N>::value_type value_type;
public:
template <class CharT>
static void encode(const std::array<T, N>& val, basic_json_output_handler<CharT>& handler)
{
handler.begin_array();
for (auto it = std::begin(val); it != std::end(val); ++it)
{
serialization_traits<value_type>::encode(*it,handler);
}
handler.end_array();
}
};
// associative container
template<class T>
struct serialization_traits<T,
typename std::enable_if<detail::is_map_like<T>::value
>::type>
{
typedef typename T::mapped_type mapped_type;
typedef typename T::value_type value_type;
template <class CharT>
static void encode(const T& val, basic_json_output_handler<CharT>& handler)
{
handler.begin_object();
for (auto it = std::begin(val); it != std::end(val); ++it)
{
handler.name(it->first);
serialization_traits<mapped_type>::encode(it->second,handler);
}
handler.end_object();
}
};
namespace detail { namespace streaming {
template<size_t Pos, class Tuple>
struct tuple_helper
{
using element_type = typename std::tuple_element<std::tuple_size<Tuple>::value - Pos, Tuple>::type;
using next = tuple_helper<Pos - 1, Tuple>;
template <class CharT>
static void encode(const Tuple& tuple, basic_json_output_handler<CharT>& handler)
{
serialization_traits<element_type>::encode(std::get<std::tuple_size<Tuple>::value - Pos>(tuple),handler);
next::encode(tuple, handler);
}
};
template<class Tuple>
struct tuple_helper<0, Tuple>
{
template <class CharT>
static void encode(const Tuple&, basic_json_output_handler<CharT>&)
{
}
};
}}
template<typename... E>
struct serialization_traits<std::tuple<E...>>
{
private:
using helper = detail::streaming::tuple_helper<sizeof...(E), std::tuple<E...>>;
public:
template <class CharT>
static void encode(const std::tuple<E...>& value, basic_json_output_handler<CharT>& handler)
{
handler.begin_array();
helper::encode(value, handler);
handler.end_array();
}
};
template<class T1, class T2>
struct serialization_traits<std::pair<T1,T2>>
{
public:
template <class CharT>
static void encode(const std::pair<T1,T2>& value, basic_json_output_handler<CharT>& handler)
{
handler.begin_array();
serialization_traits<T1>::encode(value.first, handler);
serialization_traits<T2>::encode(value.second, handler);
handler.end_array();
}
};
#if !defined(JSONCONS_NO_DEPRECATED)
template<class T>
struct serialization_traits<std::shared_ptr<T>>
{
public:
template <class CharT>
static void encode(std::shared_ptr<T> p, basic_json_output_handler<CharT>& handler)
{
serialization_traits<T>::encode(*p, handler);
}
};
#endif
}
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
#endif
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