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/*
* 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 "domaintypeadaptorfactoryinterface.h"
#include "domain/applicationdomaintype.h"
#include "domain/event.h"
#include "domain/mail.h"
#include "domain/folder.h"
#include "bufferadaptor.h"
#include "entity_generated.h"
#include "metadata_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 WritePropertyMapper<Builder> &mapper)
{
//First create a primitives such as strings using the mappings
QList<std::function<void(Builder &)> > propertiesToAddToResource;
for (const auto &property : domainObject.changedProperties()) {
// Trace() << "copying property " << property;
const auto value = domainObject.getProperty(property);
if (mapper.hasMapping(property)) {
mapper.setProperty(property, domainObject.getProperty(property), propertiesToAddToResource, fbb);
} else {
// Trace() << "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, WritePropertyMapper<BufferBuilder> &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>()) {
Warning() << "Created invalid uffer";
}
}
/**
* A generic adaptor implementation that uses a property mapper to read/write values.
*/
template <class LocalBuffer, class ResourceBuffer>
class GenericBufferAdaptor : public Sink::ApplicationDomain::BufferAdaptor
{
public:
GenericBufferAdaptor()
: BufferAdaptor()
{
}
virtual QVariant getProperty(const QByteArray &key) const
{
if (mResourceBuffer && mResourceMapper->hasMapping(key)) {
return mResourceMapper->getProperty(key, mResourceBuffer);
} else if (mLocalBuffer && mLocalMapper->hasMapping(key)) {
return mLocalMapper->getProperty(key, mLocalBuffer);
}
Warning() << "No mapping available for key " << key;
return QVariant();
}
virtual QList<QByteArray> availableProperties() const
{
return mResourceMapper->availableProperties() + mLocalMapper->availableProperties();
}
LocalBuffer const *mLocalBuffer;
ResourceBuffer const *mResourceBuffer;
QSharedPointer<ReadPropertyMapper<LocalBuffer> > mLocalMapper;
QSharedPointer<ReadPropertyMapper<ResourceBuffer> > mResourceMapper;
};
/**
* The factory should define how to go from an entitybuffer (local + resource 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, typename ResourceBuffer, typename ResourceBuilder>
class SINKCOMMON_EXPORT DomainTypeAdaptorFactory : public DomainTypeAdaptorFactoryInterface
{
typedef typename Sink::ApplicationDomain::TypeImplementation<DomainType>::Buffer LocalBuffer;
typedef typename Sink::ApplicationDomain::TypeImplementation<DomainType>::BufferBuilder LocalBuilder;
public:
DomainTypeAdaptorFactory() :
mLocalMapper(Sink::ApplicationDomain::TypeImplementation<DomainType>::initializeReadPropertyMapper()),
mResourceMapper(QSharedPointer<ReadPropertyMapper<ResourceBuffer> >::create()),
mLocalWriteMapper(Sink::ApplicationDomain::TypeImplementation<DomainType>::initializeWritePropertyMapper()),
mResourceWriteMapper(QSharedPointer<WritePropertyMapper<ResourceBuilder> >::create())
{};
virtual ~DomainTypeAdaptorFactory() {};
/**
* Creates an adaptor for the given domain and resource types.
*
* This returns by default a GenericBufferAdaptor initialized with the corresponding property mappers.
*/
virtual QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> createAdaptor(const Sink::Entity &entity) Q_DECL_OVERRIDE
{
const auto resourceBuffer = Sink::EntityBuffer::readBuffer<ResourceBuffer>(entity.resource());
const auto localBuffer = Sink::EntityBuffer::readBuffer<LocalBuffer>(entity.local());
// const auto metadataBuffer = Sink::EntityBuffer::readBuffer<Sink::Metadata>(entity.metadata());
auto adaptor = QSharedPointer<GenericBufferAdaptor<LocalBuffer, ResourceBuffer> >::create();
adaptor->mLocalBuffer = localBuffer;
adaptor->mLocalMapper = mLocalMapper;
adaptor->mResourceBuffer = resourceBuffer;
adaptor->mResourceMapper = mResourceMapper;
return adaptor;
}
virtual void createBuffer(const Sink::ApplicationDomain::ApplicationDomainType &domainObject, flatbuffers::FlatBufferBuilder &fbb, void const *metadataData = 0, size_t metadataSize = 0) Q_DECL_OVERRIDE
{
flatbuffers::FlatBufferBuilder localFbb;
if (mLocalWriteMapper) {
// Trace() << "Creating local buffer part";
createBufferPartBuffer<LocalBuffer, LocalBuilder>(domainObject, localFbb, *mLocalWriteMapper);
}
flatbuffers::FlatBufferBuilder resFbb;
if (mResourceWriteMapper) {
// Trace() << "Creating resouce buffer part";
createBufferPartBuffer<ResourceBuffer, ResourceBuilder>(domainObject, resFbb, *mResourceWriteMapper);
}
Sink::EntityBuffer::assembleEntityBuffer(fbb, metadataData, metadataSize, resFbb.GetBufferPointer(), resFbb.GetSize(), localFbb.GetBufferPointer(), localFbb.GetSize());
}
protected:
QSharedPointer<ReadPropertyMapper<LocalBuffer> > mLocalMapper;
QSharedPointer<ReadPropertyMapper<ResourceBuffer> > mResourceMapper;
QSharedPointer<WritePropertyMapper<LocalBuilder> > mLocalWriteMapper;
QSharedPointer<WritePropertyMapper<ResourceBuilder> > mResourceWriteMapper;
};
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