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Diffstat (limited to 'include/jsoncons_ext/bson/decode_bson.hpp')
| -rw-r--r-- | include/jsoncons_ext/bson/decode_bson.hpp | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/include/jsoncons_ext/bson/decode_bson.hpp b/include/jsoncons_ext/bson/decode_bson.hpp new file mode 100644 index 0000000..ad352f6 --- /dev/null +++ b/include/jsoncons_ext/bson/decode_bson.hpp @@ -0,0 +1,201 @@ +// Copyright 2013 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_BSON_DECODE_BSON_HPP +#define JSONCONS_BSON_DECODE_BSON_HPP + +#include <string> +#include <vector> +#include <memory> +#include <type_traits> // std::enable_if +#include <istream> // std::basic_istream +#include <jsoncons/json.hpp> +#include <jsoncons/config/jsoncons_config.hpp> +#include <jsoncons_ext/bson/bson_reader.hpp> +#include <jsoncons_ext/bson/bson_cursor.hpp> + +namespace jsoncons { +namespace bson { + + template<class T, class Source> + typename std::enable_if<type_traits::is_basic_json<T>::value && + type_traits::is_byte_sequence<Source>::value,T>::type + decode_bson(const Source& v, + const bson_decode_options& options = bson_decode_options()) + { + jsoncons::json_decoder<T> decoder; + auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder); + basic_bson_reader<jsoncons::bytes_source> reader(v, adaptor, options); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template<class T, class Source> + typename std::enable_if<!type_traits::is_basic_json<T>::value && + type_traits::is_byte_sequence<Source>::value,T>::type + decode_bson(const Source& v, + const bson_decode_options& options = bson_decode_options()) + { + basic_bson_cursor<bytes_source> cursor(v, options); + json_decoder<basic_json<char,sorted_policy>> decoder{}; + + std::error_code ec; + T val = decode_traits<T,char>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + template<class T> + typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type + decode_bson(std::istream& is, + const bson_decode_options& options = bson_decode_options()) + { + jsoncons::json_decoder<T> decoder; + auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder); + bson_stream_reader reader(is, adaptor, options); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template<class T> + typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type + decode_bson(std::istream& is, + const bson_decode_options& options = bson_decode_options()) + { + basic_bson_cursor<binary_stream_source> cursor(is, options); + json_decoder<basic_json<char,sorted_policy>> decoder{}; + + std::error_code ec; + T val = decode_traits<T,char>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + template<class T, class InputIt> + typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type + decode_bson(InputIt first, InputIt last, + const bson_decode_options& options = bson_decode_options()) + { + jsoncons::json_decoder<T> decoder; + auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder); + basic_bson_reader<binary_iterator_source<InputIt>> reader(binary_iterator_source<InputIt>(first, last), adaptor, options); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template<class T, class InputIt> + typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type + decode_bson(InputIt first, InputIt last, + const bson_decode_options& options = bson_decode_options()) + { + basic_bson_cursor<binary_iterator_source<InputIt>> cursor(binary_iterator_source<InputIt>(first, last), options); + json_decoder<basic_json<char,sorted_policy>> decoder{}; + + std::error_code ec; + T val = decode_traits<T,char>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + // With leading allocator parameter + + template<class T, class Source, class TempAllocator> + typename std::enable_if<type_traits::is_basic_json<T>::value && + type_traits::is_byte_sequence<Source>::value,T>::type + decode_bson(temp_allocator_arg_t, const TempAllocator& temp_alloc, + const Source& v, + const bson_decode_options& options = bson_decode_options()) + { + json_decoder<T,TempAllocator> decoder(temp_alloc); + auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder); + basic_bson_reader<jsoncons::bytes_source,TempAllocator> reader(v, adaptor, options, temp_alloc); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template<class T, class Source, class TempAllocator> + typename std::enable_if<!type_traits::is_basic_json<T>::value && + type_traits::is_byte_sequence<Source>::value,T>::type + decode_bson(temp_allocator_arg_t, const TempAllocator& temp_alloc, + const Source& v, + const bson_decode_options& options = bson_decode_options()) + { + basic_bson_cursor<bytes_source,TempAllocator> cursor(v, options, temp_alloc); + json_decoder<basic_json<char,sorted_policy,TempAllocator>,TempAllocator> decoder(temp_alloc, temp_alloc); + + std::error_code ec; + T val = decode_traits<T,char>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + template<class T,class TempAllocator> + typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type + decode_bson(temp_allocator_arg_t, const TempAllocator& temp_alloc, + std::istream& is, + const bson_decode_options& options = bson_decode_options()) + { + json_decoder<T,TempAllocator> decoder(temp_alloc); + auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder); + basic_bson_reader<jsoncons::binary_stream_source,TempAllocator> reader(is, adaptor, options, temp_alloc); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template<class T,class TempAllocator> + typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type + decode_bson(temp_allocator_arg_t, const TempAllocator& temp_alloc, + std::istream& is, + const bson_decode_options& options = bson_decode_options()) + { + basic_bson_cursor<binary_stream_source,TempAllocator> cursor(is, options, temp_alloc); + json_decoder<basic_json<char,sorted_policy,TempAllocator>,TempAllocator> decoder(temp_alloc, temp_alloc); + + std::error_code ec; + T val = decode_traits<T,char>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + +} // bson +} // jsoncons + +#endif |