src/dbus/qdbusreply.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 23 Jun 2010 19:07:03 +0300
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Revision: 201023 Kit: 2010125
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtDBus module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QDBUSREPLY_H
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#define QDBUSREPLY_H
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#include <QtCore/qglobal.h>
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#include <QtCore/qvariant.h>
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#include <QtDBus/qdbusmacros.h>
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#include <QtDBus/qdbusmessage.h>
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#include <QtDBus/qdbuserror.h>
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#include <QtDBus/qdbusextratypes.h>
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#include <QtDBus/qdbuspendingreply.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(DBus)
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QDBUS_EXPORT void qDBusReplyFill(const QDBusMessage &reply, QDBusError &error, QVariant &data);
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template<typename T>
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class QDBusReply
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{
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    typedef T Type;
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public:
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    inline QDBusReply(const QDBusMessage &reply)
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    {
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        *this = reply;
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    }
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    inline QDBusReply& operator=(const QDBusMessage &reply)
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    {
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        QVariant data(qMetaTypeId(&m_data), reinterpret_cast<void*>(0));
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        qDBusReplyFill(reply, m_error, data);
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        m_data = qvariant_cast<Type>(data);
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        return *this;
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    }
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    inline QDBusReply(const QDBusPendingCall &pcall)
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    {
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        *this = pcall;
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    }
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    inline QDBusReply &operator=(const QDBusPendingCall &pcall)
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    {
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        QDBusPendingCall other(pcall);
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        other.waitForFinished();
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        return *this = other.reply();
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    }
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    inline QDBusReply(const QDBusPendingReply<T> &reply)
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    {
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        *this = static_cast<QDBusPendingCall>(reply);
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    }
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    inline QDBusReply(const QDBusError &dbusError = QDBusError())
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        : m_error(dbusError), m_data(Type())
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    {
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    }
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    inline QDBusReply& operator=(const QDBusError& dbusError)
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    {
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        m_error = dbusError;
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        m_data = Type();
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        return *this;
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    }
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    inline QDBusReply& operator=(const QDBusReply& other)
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    {
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        m_error = other.m_error;
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        m_data = other.m_data;
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        return *this;
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    }
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    inline bool isValid() const { return !m_error.isValid(); }
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    inline const QDBusError& error() { return m_error; }
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    inline Type value() const
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    {
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        return m_data;
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    }
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    inline operator Type () const
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    {
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        return m_data;
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    }
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private:
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    QDBusError m_error;
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    Type m_data;
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};
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# ifndef Q_QDOC
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// specialize for QVariant:
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template<> inline QDBusReply<QVariant>&
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QDBusReply<QVariant>::operator=(const QDBusMessage &reply)
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{
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    void *null = 0;
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    QVariant data(qMetaTypeId<QDBusVariant>(), null);
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    qDBusReplyFill(reply, m_error, data);
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    m_data = qvariant_cast<QDBusVariant>(data).variant();
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    return *this;
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}
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// specialize for void:
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template<>
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class QDBusReply<void>
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{
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public:
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    inline QDBusReply(const QDBusMessage &reply)
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        : m_error(reply)
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    {
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    }
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    inline QDBusReply& operator=(const QDBusMessage &reply)
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    {
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        m_error = reply;
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        return *this;
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    }
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    inline QDBusReply(const QDBusError &dbusError = QDBusError())
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        : m_error(dbusError)
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    {
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    }
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    inline QDBusReply(const QDBusPendingCall &pcall)
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    {
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        *this = pcall;
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    }
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    inline QDBusReply &operator=(const QDBusPendingCall &pcall)
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    {
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        QDBusPendingCall other(pcall);
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        other.waitForFinished();
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        return *this = other.reply();
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    }
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    inline QDBusReply& operator=(const QDBusError& dbusError)
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    {
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        m_error = dbusError;
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        return *this;
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    }
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    inline QDBusReply& operator=(const QDBusReply& other)
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    {
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        m_error = other.m_error;
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        return *this;
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    }
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    inline bool isValid() const { return !m_error.isValid(); }
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    inline const QDBusError& error() { return m_error; }
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private:
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    QDBusError m_error;
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};
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# endif
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif