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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* 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 <QVariant>
#include <QByteArray>
#include <functional>
#include "domaintypeadaptorfactoryinterface.h"
#include "domain/applicationdomaintype.h"
#include "domain/typeimplementations.h"
#include "bufferadaptor.h"
#include "entity_generated.h"
#include "entitybuffer.h"
#include "propertymapper.h"
#include "log.h"
/**
* Create a buffer from a domain object using the provided mappings
*/
template <class Builder, class Buffer>
flatbuffers::Offset<Buffer>
createBufferPart(const Sink::ApplicationDomain::ApplicationDomainType &domainObject, flatbuffers::FlatBufferBuilder &fbb, const PropertyMapper &mapper)
{
// First create a primitives such as strings using the mappings
QList<std::function<void(void *builder)>> propertiesToAddToResource;
for (const auto &property : domainObject.changedProperties()) {
// SinkTrace() << "copying property " << property;
const auto value = domainObject.getProperty(property);
if (mapper.hasMapping(property)) {
mapper.setProperty(property, domainObject.getProperty(property), propertiesToAddToResource, fbb);
} else {
// SinkTrace() << "no mapping for property available " << property;
}
}
// Then create all porperties using the above generated builderCalls
Builder builder(fbb);
for (auto propertyBuilder : propertiesToAddToResource) {
propertyBuilder(&builder);
}
return builder.Finish();
}
/**
* Create the buffer and finish the FlatBufferBuilder.
*
* After this the buffer can be extracted from the FlatBufferBuilder object.
*/
template <typename Buffer, typename BufferBuilder>
static void createBufferPartBuffer(const Sink::ApplicationDomain::ApplicationDomainType &domainObject, flatbuffers::FlatBufferBuilder &fbb, PropertyMapper &mapper)
{
auto pos = createBufferPart<BufferBuilder, Buffer>(domainObject, fbb, mapper);
// Because we cannot template the following call
// Sink::ApplicationDomain::Buffer::FinishEventBuffer(fbb, pos);
// FIXME: This means all buffers in here must have the AKFB identifier
fbb.Finish(pos, "AKFB");
flatbuffers::Verifier verifier(fbb.GetBufferPointer(), fbb.GetSize());
if (!verifier.VerifyBuffer<Buffer>(nullptr)) {
SinkWarning_(0, "bufferadaptor") << "Created invalid uffer";
}
}
class IndexPropertyMapper
{
public:
typedef std::function<QVariant(TypeIndex &index, const Sink::ApplicationDomain::BufferAdaptor &adaptor)> Accessor;
virtual ~IndexPropertyMapper(){};
virtual QVariant getProperty(const QByteArray &key, TypeIndex &index, const Sink::ApplicationDomain::BufferAdaptor &adaptor) const
{
auto accessor = mReadAccessors.value(key);
Q_ASSERT(accessor);
if (!accessor) {
return QVariant();
}
return accessor(index, adaptor);
}
bool hasMapping(const QByteArray &key) const
{
return mReadAccessors.contains(key);
}
QList<QByteArray> availableProperties() const
{
return mReadAccessors.keys();
}
template<typename Property>
void addIndexLookupProperty(const Accessor &accessor)
{
mReadAccessors.insert(Property::name, accessor);
}
private:
QHash<QByteArray, Accessor> mReadAccessors;
};
/**
* A generic adaptor implementation that uses a property mapper to read/write values.
*/
class DatastoreBufferAdaptor : public Sink::ApplicationDomain::BufferAdaptor
{
public:
DatastoreBufferAdaptor() : BufferAdaptor()
{
}
virtual void setProperty(const QByteArray &key, const QVariant &value) Q_DECL_OVERRIDE
{
SinkWarning() << "Can't set property " << key;
Q_ASSERT(false);
}
virtual QVariant getProperty(const QByteArray &key) const Q_DECL_OVERRIDE
{
if (mLocalBuffer && mLocalMapper->hasMapping(key)) {
return mLocalMapper->getProperty(key, mLocalBuffer);
} else if (mIndex && mIndexMapper->hasMapping(key)) {
return mIndexMapper->getProperty(key, *mIndex, *this);
}
return QVariant();
}
/**
* Returns all available properties for which a mapping exists (no matter what the buffer contains)
*/
virtual QList<QByteArray> availableProperties() const Q_DECL_OVERRIDE
{
return mLocalMapper->availableProperties() + mIndexMapper->availableProperties();
}
void const *mLocalBuffer;
QSharedPointer<PropertyMapper> mLocalMapper;
QSharedPointer<IndexPropertyMapper> mIndexMapper;
TypeIndex *mIndex;
};
/**
* The factory should define how to go from an entitybuffer (local buffer), to a domain type adapter.
* It defines how values are split accross local and resource buffer.
* This is required by the facade the read the value, and by the pipeline preprocessors to access the domain values in a generic way.
*/
template <typename DomainType>
class DomainTypeAdaptorFactory : public DomainTypeAdaptorFactoryInterface
{
typedef typename Sink::ApplicationDomain::TypeImplementation<DomainType>::Buffer LocalBuffer;
typedef typename Sink::ApplicationDomain::TypeImplementation<DomainType>::BufferBuilder LocalBuilder;
public:
DomainTypeAdaptorFactory()
: mPropertyMapper(QSharedPointer<PropertyMapper>::create()),
mIndexMapper(QSharedPointer<IndexPropertyMapper>::create())
{
Sink::ApplicationDomain::TypeImplementation<DomainType>::configure(*mPropertyMapper);
Sink::ApplicationDomain::TypeImplementation<DomainType>::configure(*mIndexMapper);
}
virtual ~DomainTypeAdaptorFactory(){};
/**
* Creates an adaptor for the given domain types.
*
* This returns by default a DatastoreBufferAdaptor initialized with the corresponding property mappers.
*/
virtual QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> createAdaptor(const Sink::Entity &entity, TypeIndex *index = nullptr) Q_DECL_OVERRIDE
{
auto adaptor = QSharedPointer<DatastoreBufferAdaptor>::create();
adaptor->mLocalBuffer = Sink::EntityBuffer::readBuffer<LocalBuffer>(entity.local());
adaptor->mLocalMapper = mPropertyMapper;
adaptor->mIndexMapper = mIndexMapper;
adaptor->mIndex = index;
return adaptor;
}
virtual bool
createBuffer(const Sink::ApplicationDomain::ApplicationDomainType &domainObject, flatbuffers::FlatBufferBuilder &fbb, void const *metadataData = 0, size_t metadataSize = 0) Q_DECL_OVERRIDE
{
flatbuffers::FlatBufferBuilder localFbb;
createBufferPartBuffer<LocalBuffer, LocalBuilder>(domainObject, localFbb, *mPropertyMapper);
Sink::EntityBuffer::assembleEntityBuffer(fbb, metadataData, metadataSize, 0, 0, localFbb.GetBufferPointer(), localFbb.GetSize());
return true;
}
virtual bool createBuffer(const QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> &bufferAdaptor, flatbuffers::FlatBufferBuilder &fbb, void const *metadataData = nullptr, size_t metadataSize = 0) Q_DECL_OVERRIDE
{
//TODO rewrite the unterlying functions so we don't have to wrap the bufferAdaptor
auto newObject = Sink::ApplicationDomain::ApplicationDomainType("", "", 0, bufferAdaptor);
//Serialize all properties
newObject.setChangedProperties(bufferAdaptor->availableProperties().toSet());
return createBuffer(newObject, fbb, metadataData, metadataSize);
}
protected:
QSharedPointer<PropertyMapper> mPropertyMapper;
QSharedPointer<IndexPropertyMapper> mIndexMapper;
};
/**
* A default adaptorfactory implemenation that simply instantiates a generic resource
*/
template<typename DomainType>
class DefaultAdaptorFactory : public DomainTypeAdaptorFactory<DomainType>
{
public:
DefaultAdaptorFactory() : DomainTypeAdaptorFactory<DomainType>() {}
virtual ~DefaultAdaptorFactory(){}
};
|
