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/**
* This file is part of TelepathyQt4
*
* @copyright Copyright (C) 2008-2009 Collabora Ltd. <http://www.collabora.co.uk/>
* @copyright Copyright (C) 2008-2009 Nokia Corporation
* @license LGPL 2.1
*
* 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) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _TelepathyQt4_optional_interface_factory_h_HEADER_GUARD_
#define _TelepathyQt4_optional_interface_factory_h_HEADER_GUARD_
#ifndef IN_TELEPATHY_QT4_HEADER
#error IN_TELEPATHY_QT4_HEADER
#endif
#include <TelepathyQt4/Global>
#include <QObject>
#include <QStringList>
#include <QtGlobal>
namespace Tp
{
class AbstractInterface;
#ifndef DOXYGEN_SHOULD_SKIP_THIS
class TELEPATHY_QT4_EXPORT OptionalInterfaceCache
{
Q_DISABLE_COPY(OptionalInterfaceCache)
public:
explicit OptionalInterfaceCache(QObject *proxy);
~OptionalInterfaceCache();
protected:
AbstractInterface *getCached(const QString &name) const;
void cache(AbstractInterface *interface) const;
QObject *proxy() const;
private:
struct Private;
friend struct Private;
Private *mPriv;
};
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
template <typename DBusProxySubclass> class OptionalInterfaceFactory
#ifndef DOXYGEN_SHOULD_SKIP_THIS
: private OptionalInterfaceCache
#endif
{
Q_DISABLE_COPY(OptionalInterfaceFactory)
public:
enum InterfaceSupportedChecking
{
CheckInterfaceSupported,
BypassInterfaceCheck
};
inline OptionalInterfaceFactory(DBusProxySubclass *this_)
: OptionalInterfaceCache(this_)
{
}
inline ~OptionalInterfaceFactory()
{
}
inline QStringList interfaces() const { return mInterfaces; }
inline bool hasInterface(const QString &name) const
{
return mInterfaces.contains(name);
}
template <class Interface>
inline Interface *optionalInterface(
InterfaceSupportedChecking check = CheckInterfaceSupported) const
{
// Check for the remote object supporting the interface
QString name(QLatin1String(Interface::staticInterfaceName()));
if (check == CheckInterfaceSupported && !mInterfaces.contains(name)) {
return 0;
}
// If present or forced, delegate to OptionalInterfaceFactory
return interface<Interface>();
}
template <typename Interface>
inline Interface *interface() const
{
AbstractInterface* interfaceMustBeASubclassOfAbstractInterface = static_cast<Interface *>(NULL);
Q_UNUSED(interfaceMustBeASubclassOfAbstractInterface);
// If there is a interface cached already, return it
QString name(QLatin1String(Interface::staticInterfaceName()));
AbstractInterface *cached = getCached(name);
if (cached)
return static_cast<Interface *>(cached);
// Otherwise, cache and return a newly constructed proxy
Interface *interface = new Interface(
static_cast<DBusProxySubclass *>(proxy()));
cache(interface);
return interface;
}
protected:
inline void setInterfaces(const QStringList &interfaces)
{
mInterfaces = interfaces;
}
private:
QStringList mInterfaces;
};
} // Tp
#endif
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