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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QDBUSPENDINGREPLY_H
#define QDBUSPENDINGREPLY_H
#include <QtCore/qglobal.h>
#include <QtDBus/qdbusmacros.h>
#include <QtDBus/qdbusargument.h>
#include <QtDBus/qdbuspendingcall.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(DBus)
class QDBUS_EXPORT QDBusPendingReplyData: public QDBusPendingCall
{
protected:
QDBusPendingReplyData();
~QDBusPendingReplyData();
void assign(const QDBusPendingCall &call);
void assign(const QDBusMessage &message);
QVariant argumentAt(int index) const;
void setMetaTypes(int count, const int *metaTypes);
};
namespace QDBusPendingReplyTypes {
template<int Index,
typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
struct Select
{
typedef Select<Index - 1, T2, T3, T4, T5, T6, T7, T8, void> Next;
typedef typename Next::Type Type;
};
template<typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
struct Select<0, T1, T2, T3, T4, T5, T6, T7, T8>
{
typedef T1 Type;
};
template<typename T1> inline int metaTypeFor(T1 * = 0)
{ return qMetaTypeId<T1>(); }
// specialise for QVariant, allowing it to be used in place of QDBusVariant
template<> inline int metaTypeFor<QVariant>(QVariant *)
{ return qMetaTypeId<QDBusVariant>(); }
template<typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
struct ForEach
{
typedef ForEach<T2, T3, T4, T5, T6, T7, T8, void> Next;
enum { Total = Next::Total + 1 };
static inline void fillMetaTypes(int *p)
{
*p = metaTypeFor<T1>();
Next::fillMetaTypes(++p);
}
};
template<>
struct ForEach<void, void, void, void, void, void, void, void>
{
enum { Total = 0 };
static inline void fillMetaTypes(int *)
{ }
};
} // namespace QDBusPendingReplyTypes
template<typename T1 = void, typename T2 = void, typename T3 = void, typename T4 = void,
typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void>
class QDBusPendingReply:
#ifdef Q_QDOC
public QDBusPendingCall
#else
public QDBusPendingReplyData
#endif
{
typedef QDBusPendingReplyTypes::ForEach<T1, T2, T3, T4, T5, T6, T7, T8> ForEach;
template<int Index> struct Select :
QDBusPendingReplyTypes::Select<Index, T1, T2, T3, T4, T5, T6, T7, T8>
{
};
public:
enum { Count = ForEach::Total };
inline QDBusPendingReply()
{ }
inline QDBusPendingReply(const QDBusPendingReply &other)
: QDBusPendingReplyData(other)
{ }
inline QDBusPendingReply(const QDBusPendingCall &call)
{ *this = call; }
inline QDBusPendingReply(const QDBusMessage &message)
{ *this = message; }
inline QDBusPendingReply &operator=(const QDBusPendingReply &other)
{ assign(other); return *this; }
inline QDBusPendingReply &operator=(const QDBusPendingCall &call)
{ assign(call); return *this; }
inline QDBusPendingReply &operator=(const QDBusMessage &message)
{ assign(message); return *this; }
inline int count() const { return Count; }
#if defined(Q_QDOC) || defined(Q_NO_USING_KEYWORD)
inline QVariant argumentAt(int index) const
{ return QDBusPendingReplyData::argumentAt(index); }
#else
using QDBusPendingReplyData::argumentAt;
#endif
#if defined(Q_QDOC)
bool isFinished() const;
void waitForFinished();
bool isValid() const;
bool isError() const;
QDBusError error() const;
QDBusMessage reply() const;
template<int Index> inline Type argumentAt() const;
inline T1 value() const;
inline operator T1() const;
#else
template<int Index> inline
const typename Select<Index>::Type argumentAt() const
{
// static assert?
Q_ASSERT_X(Index < count() && Index >= 0, "QDBusPendingReply::argumentAt",
"Index out of bounds");
typedef typename Select<Index>::Type ResultType;
return qdbus_cast<ResultType>(argumentAt(Index));
}
inline typename Select<0>::Type value() const
{
return argumentAt<0>();
}
inline operator typename Select<0>::Type() const
{
return argumentAt<0>();
}
#endif
private:
inline void calculateMetaTypes()
{
int typeIds[Count > 0 ? Count : 1]; // use at least one since zero-sized arrays aren't valid
ForEach::fillMetaTypes(typeIds);
setMetaTypes(Count, typeIds);
}
inline void assign(const QDBusPendingCall &call)
{
QDBusPendingReplyData::assign(call);
calculateMetaTypes();
}
inline void assign(const QDBusMessage &message)
{
QDBusPendingReplyData::assign(message);
calculateMetaTypes();
}
};
QT_END_NAMESPACE
QT_END_HEADER
#endif
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