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
|
#include <qpdf/JSONHandler.hh>
#include <qpdf/QUtil.hh>
#include <qpdf/QTC.hh>
JSONHandler::Error::Error(std::string const& msg) :
std::runtime_error(msg)
{
}
JSONHandler::JSONHandler() :
m(new Members())
{
}
JSONHandler::Members::Members()
{
}
void
JSONHandler::addAnyHandler(json_handler_t fn)
{
this->m->h.any_handler = fn;
}
void
JSONHandler::addNullHandler(void_handler_t fn)
{
this->m->h.null_handler = fn;
}
void
JSONHandler::addStringHandler(string_handler_t fn)
{
this->m->h.string_handler = fn;
}
void
JSONHandler::addNumberHandler(string_handler_t fn)
{
this->m->h.number_handler = fn;
}
void
JSONHandler::addBoolHandler(bool_handler_t fn)
{
this->m->h.bool_handler = fn;
}
std::map<std::string, std::shared_ptr<JSONHandler>>&
JSONHandler::addDictHandlers()
{
return this->m->h.dict_handlers;
}
void
JSONHandler::addFallbackDictHandler(std::shared_ptr<JSONHandler> fdh)
{
this->m->h.fallback_dict_handler = fdh;
}
void
JSONHandler::addArrayHandler(std::shared_ptr<JSONHandler> ah)
{
this->m->h.array_handler = ah;
}
void
JSONHandler::handle(std::string const& path, JSON j)
{
if (this->m->h.any_handler)
{
this->m->h.any_handler(path, j);
return;
}
bool handled = false;
bool bvalue = false;
std::string svalue;
if (this->m->h.null_handler && j.isNull())
{
this->m->h.null_handler(path);
handled = true;
}
if (this->m->h.string_handler && j.getString(svalue))
{
this->m->h.string_handler(path, svalue);
handled = true;
}
if (this->m->h.number_handler && j.getNumber(svalue))
{
this->m->h.number_handler(path, svalue);
handled = true;
}
if (this->m->h.bool_handler && j.getBool(bvalue))
{
this->m->h.bool_handler(path, bvalue);
handled = true;
}
if ((this->m->h.fallback_dict_handler.get() ||
(! this->m->h.dict_handlers.empty())) && j.isDictionary())
{
std::string path_base = path;
if (path_base != ".")
{
path_base += ".";
}
j.forEachDictItem([&path, &path_base, this](
std::string const& k, JSON v) {
auto i = this->m->h.dict_handlers.find(k);
if (i == this->m->h.dict_handlers.end())
{
if (this->m->h.fallback_dict_handler.get())
{
this->m->h.fallback_dict_handler->handle(
path_base + k, v);
}
else
{
QTC::TC("libtests", "JSONHandler unexpected key");
throw Error(
"JSON handler found unexpected key " + k +
" in object at " + path);
}
}
else
{
i->second->handle(path_base + k, v);
}
});
// Set handled = true even if we didn't call any handlers.
// This dictionary could have been empty, but it's okay since
// it's a dictionary like it's supposed to be.
handled = true;
}
if (this->m->h.array_handler.get())
{
size_t i = 0;
j.forEachArrayItem([&i, &path, this](JSON v) {
this->m->h.array_handler->handle(
path + "[" + QUtil::uint_to_string(i) + "]", v);
++i;
});
// Set handled = true even if we didn't call any handlers.
// This could have been an empty array.
handled = true;
}
if (! handled)
{
// It would be nice to include information about what type the
// object was and what types were allowed, but we're relying
// on schema validation to make sure input is properly
// structured before calling the handlers. It would be
// different if this code were trying to be part of a
// general-purpose JSON package.
QTC::TC("libtests", "JSONHandler unhandled value");
throw Error("JSON handler: value at " + path +
" is not of expected type");
}
}
|
