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/*
* Copyright (C) 2016 Christian Mollekopf <mollekopf@kolabsys.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3, or any
* later version accepted by the membership of KDE e.V. (or its
* successor approved by the membership of KDE e.V.), which shall
* act as a proxy defined in Section 6 of version 3 of the license.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "domaintypeadaptorfactoryinterface.h"
#include "applicationdomaintype.h"
#include "resourceaccess.h"
#include <QByteArray>
#include <QMap>
namespace Sink {
/*
* A context object that can be passed around so each part of the system knows in what context it works.
*
* This is necessary because we can't rely on a singleton or thread-local storage since multiple resources can be accessed from the same thread/process.
*/
struct ResourceContext {
const QByteArray resourceInstanceIdentifier;
const QByteArray resourceType;
QMap<QByteArray, DomainTypeAdaptorFactoryInterface::Ptr> adaptorFactories;
//TODO prehaps use a weak pointer to not mess up lifetime management
ResourceAccessInterface::Ptr mResourceAccess;
ResourceContext(const QByteArray &identifier, const QByteArray &resourceType_, const QMap<QByteArray, DomainTypeAdaptorFactoryInterface::Ptr> &factories = QMap<QByteArray, DomainTypeAdaptorFactoryInterface::Ptr>())
: resourceInstanceIdentifier(identifier),
resourceType(resourceType_),
adaptorFactories(factories)
{
}
QByteArray instanceId() const
{
return resourceInstanceIdentifier;
}
DomainTypeAdaptorFactoryInterface &adaptorFactory(const QByteArray &type) const
{
auto factory = adaptorFactories.value(type);
if (!factory) {
qFatal("Failed to find a factory for %s", type.constData());
}
return *factory;
}
template<typename DomainType>
DomainTypeAdaptorFactoryInterface &adaptorFactory()
{
return adaptorFactory(ApplicationDomain::getTypeName<DomainType>());
}
ResourceAccessInterface::Ptr resourceAccess()
{
if (!mResourceAccess) {
mResourceAccess = ResourceAccessFactory::instance().getAccess(resourceInstanceIdentifier, resourceType);
}
return mResourceAccess;
}
};
}
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