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
|
/*
* Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include "sinkcommon_export.h"
#include <QVariant>
#include <QByteArray>
#include <functional>
#include <flatbuffers/flatbuffers.h>
/**
* Defines how to convert qt primitives to flatbuffer ones
*/
template <class T>
flatbuffers::uoffset_t SINKCOMMON_EXPORT variantToProperty(const QVariant &, flatbuffers::FlatBufferBuilder &fbb);
/**
* Defines how to convert flatbuffer primitives to qt ones
*/
template <typename T>
QVariant SINKCOMMON_EXPORT propertyToVariant(const flatbuffers::String *);
template <typename T>
QVariant SINKCOMMON_EXPORT propertyToVariant(uint8_t);
template <typename T>
QVariant SINKCOMMON_EXPORT propertyToVariant(const flatbuffers::Vector<uint8_t> *);
/**
* The property mapper is a non-typesafe virtual dispatch.
*
* Instead of using an interface and requring each implementation to override
* a virtual method per property, the property mapper can be filled with accessors
* that extract the properties from resource types.
*/
template<typename BufferType>
class ReadPropertyMapper
{
public:
virtual ~ReadPropertyMapper(){};
virtual QVariant getProperty(const QByteArray &key, BufferType const *buffer) const
{
if (mReadAccessors.contains(key)) {
auto accessor = mReadAccessors.value(key);
return accessor(buffer);
}
return QVariant();
}
bool hasMapping(const QByteArray &key) const { return mReadAccessors.contains(key); }
QList<QByteArray> availableProperties() const { return mReadAccessors.keys(); }
void addMapping(const QByteArray &property, const std::function<QVariant(BufferType const *)> &mapping) {
mReadAccessors.insert(property, mapping);
}
template <typename T, typename Buffer>
void addMapping(const QByteArray &name, const flatbuffers::String *(Buffer::*f)() const)
{
addMapping(name, [f](Buffer const *buffer) -> QVariant {
return propertyToVariant<T>((buffer->*f)());
});
}
template <typename T, typename Buffer>
void addMapping(const QByteArray &name, uint8_t (Buffer::*f)() const)
{
addMapping(name, [f](Buffer const *buffer) -> QVariant {
return propertyToVariant<T>((buffer->*f)());
});
}
template <typename T, typename Buffer>
void addMapping(const QByteArray &name, bool (Buffer::*f)() const)
{
addMapping(name, [f](Buffer const *buffer) -> QVariant {
return propertyToVariant<T>((buffer->*f)());
});
}
template <typename T, typename Buffer>
void addMapping(const QByteArray &name, const flatbuffers::Vector<uint8_t> * (Buffer::*f)() const)
{
addMapping(name, [f](Buffer const *buffer) -> QVariant {
return propertyToVariant<T>((buffer->*f)());
});
}
private:
QHash<QByteArray, std::function<QVariant(BufferType const *)> > mReadAccessors;
};
template<typename BufferBuilder>
class WritePropertyMapper
{
public:
virtual ~WritePropertyMapper(){};
virtual void setProperty(const QByteArray &key, const QVariant &value, QList<std::function<void(BufferBuilder &)> > &builderCalls, flatbuffers::FlatBufferBuilder &fbb) const
{
if (mWriteAccessors.contains(key)) {
auto accessor = mWriteAccessors.value(key);
builderCalls << accessor(value, fbb);
}
}
bool hasMapping(const QByteArray &key) const { return mWriteAccessors.contains(key); }
void addMapping(const QByteArray &property, const std::function<std::function<void(BufferBuilder &)>(const QVariant &, flatbuffers::FlatBufferBuilder &)> &mapping) {
mWriteAccessors.insert(property, mapping);
}
template <typename T>
void addMapping(const QByteArray &name, void (BufferBuilder::*f)(uint8_t))
{
addMapping(name, [f](const QVariant &value, flatbuffers::FlatBufferBuilder &fbb) -> std::function<void(BufferBuilder &)> {
return [value, f](BufferBuilder &builder) {
(builder.*f)(value.value<T>());
};
});
}
template <typename T>
void addMapping(const QByteArray &name, void (BufferBuilder::*f)(bool))
{
addMapping(name, [f](const QVariant &value, flatbuffers::FlatBufferBuilder &fbb) -> std::function<void(BufferBuilder &)> {
return [value, f](BufferBuilder &builder) {
(builder.*f)(value.value<T>());
};
});
}
template <typename T>
void addMapping(const QByteArray &name, void (BufferBuilder::*f)(flatbuffers::Offset<flatbuffers::String>))
{
addMapping(name, [f](const QVariant &value, flatbuffers::FlatBufferBuilder &fbb) -> std::function<void(BufferBuilder &)> {
auto offset = variantToProperty<T>(value, fbb);
return [offset, f](BufferBuilder &builder) {
(builder.*f)(offset);
};
});
}
template <typename T>
void addMapping(const QByteArray &name, void (BufferBuilder::*f)(flatbuffers::Offset<flatbuffers::Vector<uint8_t> >))
{
addMapping(name, [f](const QVariant &value, flatbuffers::FlatBufferBuilder &fbb) -> std::function<void(BufferBuilder &)> {
auto offset = variantToProperty<T>(value, fbb);
return [offset, f](BufferBuilder &builder) {
(builder.*f)(offset);
};
});
}
private:
QHash<QByteArray, std::function<std::function<void(BufferBuilder &)>(const QVariant &, flatbuffers::FlatBufferBuilder &)> > mWriteAccessors;
};
|
