1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
// Copyright 2013-2025 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_EXT_BSON_DECODE_BSON_HPP
#define JSONCONS_EXT_BSON_DECODE_BSON_HPP
#include <istream> // std::basic_istream
#include <type_traits> // std::enable_if
#include <jsoncons/allocator_set.hpp>
#include <jsoncons/config/compiler_support.hpp>
#include <jsoncons/utility/extension_traits.hpp>
#include <jsoncons/basic_json.hpp>
#include <jsoncons/conv_error.hpp>
#include <jsoncons/json_decoder.hpp>
#include <jsoncons/decode_traits.hpp>
#include <jsoncons/json_visitor.hpp>
#include <jsoncons/source.hpp>
#include <jsoncons_ext/bson/bson_cursor.hpp>
#include <jsoncons_ext/bson/bson_options.hpp>
#include <jsoncons_ext/bson/bson_reader.hpp>
namespace jsoncons {
namespace bson {
template <typename T,typename Source>
typename std::enable_if<extension_traits::is_basic_json<T>::value &&
extension_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 <typename T,typename Source>
typename std::enable_if<!extension_traits::is_basic_json<T>::value &&
extension_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 (JSONCONS_UNLIKELY(ec))
{
JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
}
return val;
}
template <typename T>
typename std::enable_if<extension_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 <typename T>
typename std::enable_if<!extension_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 (JSONCONS_UNLIKELY(ec))
{
JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
}
return val;
}
template <typename T,typename InputIt>
typename std::enable_if<extension_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 <typename T,typename InputIt>
typename std::enable_if<!extension_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 (JSONCONS_UNLIKELY(ec))
{
JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
}
return val;
}
// With leading allocator_set parameter
template <typename T,typename Source,typename Allocator,typename TempAllocator >
typename std::enable_if<extension_traits::is_basic_json<T>::value &&
extension_traits::is_byte_sequence<Source>::value,T>::type
decode_bson(const allocator_set<Allocator,TempAllocator>& alloc_set,
const Source& v,
const bson_decode_options& options = bson_decode_options())
{
json_decoder<T,TempAllocator> decoder(alloc_set.get_allocator(), alloc_set.get_temp_allocator());
auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder);
basic_bson_reader<jsoncons::bytes_source,TempAllocator> reader(v, adaptor, options, alloc_set.get_temp_allocator());
reader.read();
if (!decoder.is_valid())
{
JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
}
return decoder.get_result();
}
template <typename T,typename Source,typename Allocator,typename TempAllocator >
typename std::enable_if<!extension_traits::is_basic_json<T>::value &&
extension_traits::is_byte_sequence<Source>::value,T>::type
decode_bson(const allocator_set<Allocator,TempAllocator>& alloc_set,
const Source& v,
const bson_decode_options& options = bson_decode_options())
{
basic_bson_cursor<bytes_source,TempAllocator> cursor(v, options, alloc_set.get_temp_allocator());
json_decoder<basic_json<char,sorted_policy,TempAllocator>,TempAllocator> decoder(alloc_set.get_temp_allocator(), alloc_set.get_temp_allocator());
std::error_code ec;
T val = decode_traits<T,char>::decode(cursor, decoder, ec);
if (JSONCONS_UNLIKELY(ec))
{
JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
}
return val;
}
template <typename T,typename Allocator,typename TempAllocator >
typename std::enable_if<extension_traits::is_basic_json<T>::value,T>::type
decode_bson(const allocator_set<Allocator,TempAllocator>& alloc_set,
std::istream& is,
const bson_decode_options& options = bson_decode_options())
{
json_decoder<T,TempAllocator> decoder(alloc_set.get_allocator(), alloc_set.get_temp_allocator());
auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder);
basic_bson_reader<jsoncons::binary_stream_source,TempAllocator> reader(is, adaptor, options, alloc_set.get_temp_allocator());
reader.read();
if (!decoder.is_valid())
{
JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
}
return decoder.get_result();
}
template <typename T,typename Allocator,typename TempAllocator >
typename std::enable_if<!extension_traits::is_basic_json<T>::value,T>::type
decode_bson(const allocator_set<Allocator,TempAllocator>& alloc_set,
std::istream& is,
const bson_decode_options& options = bson_decode_options())
{
basic_bson_cursor<binary_stream_source,TempAllocator> cursor(is, options, alloc_set.get_temp_allocator());
json_decoder<basic_json<char,sorted_policy,TempAllocator>,TempAllocator> decoder(alloc_set.get_temp_allocator(), alloc_set.get_temp_allocator());
std::error_code ec;
T val = decode_traits<T,char>::decode(cursor, decoder, ec);
if (JSONCONS_UNLIKELY(ec))
{
JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
}
return val;
}
} // namespace bson
} // namespace jsoncons
#endif // JSONCONS_EXT_BSON_DECODE_BSON_HPP
|
