src/messaging/qmessageservice.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 25 Aug 2010 15:49:42 +0300
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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 Qt Mobility Components.
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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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#include "qmessageservice.h"
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#ifdef Q_OS_SYMBIAN
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#include "qmessageservice_symbian_p.h"
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#endif
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QTM_BEGIN_NAMESPACE
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/*!
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    \class QMessageService
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    \ingroup messaging
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    \brief The QMessageService class provides the interface for requesting 
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    messaging service operations.
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    QMessageService provides the mechanisms for messaging clients to request services, 
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    and to receive information in response.  All requestable service operations present 
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    the same interface for communicating status, and progress information.
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    All service request operations communicate changes in their operational state 
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    by emitting the stateChanged() signal.
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    Service request operations report progress information by emitting the 
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    progressChanged() signal.
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    If a requested operation fails after being initiated then the error() 
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    function will return a value indicating the failure mode encountered.
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    A client may attempt to cancel a requested operation after it has been 
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    initiated. The cancel() slot is provided for this purpose.  Cancelation
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    is not guaranteed to succeed, and is not possible on all platforms.
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    A QMessageService instance supports only a single request at a time. Attempting 
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    to initiate an operation on a QMessageService while another operation is already 
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    in progress will result in function initiating the latter request returning 
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    false. A client may, however, use multiple QMessageService instances to 
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    concurrently initiate a queue of requests that will be serviced sequentially.
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    Each QMessageService instance will report only the changes pertaining to 
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    the request that instance initiated.
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    Except where noted QMessageServices may initiate network activity. 
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    Other functions in the mobility messaging API will not initiate network 
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    activity, with the exception of Windows mobile and desktop platforms which 
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    may initiate network activity during the evaluation of any function call.
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*/
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/*!
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    \enum QMessageService::State
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    This enum type is used to describe the state of the requested operation.
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    \value InactiveState    The operation has not yet begun execution.
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    \value ActiveState      The operation is currently executing.
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    \value CanceledState    The operation was canceled.
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    \value FinishedState    The operation has finished execution; succesfully completed or otherwise.
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*/
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/*!
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    \fn QMessageService::QMessageService(QObject *parent)
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    Constructs a message service representation object.
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    The \a parent is passed to the QObject constructor.
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*/
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/*!
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    \fn QMessageService::~QMessageService()
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    Destroys the message service representation.
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*/
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/*!
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    \fn QMessageService::queryMessages(const QMessageFilter &filter, const QMessageSortOrder &sortOrder, uint limit, uint offset)
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    Emits via messagesFound() signals \l{QMessageId}s of messages in the messaging 
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    store. If \a filter is not empty only identifiers for messages matching the parameters 
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    set by \a filter will be emitted, otherwise identifiers for all messages will be emitted.
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    If \a sortOrder is not empty, then the identifiers will be sorted by the parameters 
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    set by \a sortOrder.
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    If \a limit is not zero, then \a limit places an upper bound on the number of 
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    ids in the list returned.
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    \a offset specifies how many ids to skip at the beginning of the list returned.
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    Calling this function may result in the messagesFound() and progressChanged() 
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    signals  being emitted multiple times. An emission of the progressChanged()
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    signal with a total of 0 indicates that the number of progress steps is
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    unknown.
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    The performance of querying messages is currently significantly less than 
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    optimal for some querying criteria on some platforms.
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    Returns true if the operation can be initiated; otherwise returns false.
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    Note: This function should not initiate network activity, instead only message data
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    already stored on the device will be used during evaluation of the function.
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    \sa  QMessage, QMessageFilter, QMessageSortOrder, messagesFound(), progressChanged(), countMessages()
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*/
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/*!
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    \fn QMessageService::queryMessages(const QMessageFilter &filter, const QString &body, QMessageDataComparator::MatchFlags matchFlags, const QMessageSortOrder &sortOrder, uint limit, uint offset)
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    Emits via the messagesFound() signal \l{QMessageId}s of messages in the messaging 
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    store. If \a filter is not empty only identifiers for messages matching the parameters 
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    set by \a filter and with a body containing the string \a body will be emitted, 
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    otherwise identifiers for all messages with a body containing \a body using 
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    matching flags \a matchFlags will be emitted.
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    If \a sortOrder is not empty, then the identifiers will be sorted by the parameters 
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    set by \a sortOrder.
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    If \a limit is not zero, then \a limit places an upper bound on the number of 
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    ids in the list returned.
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    \a offset specifies how many ids to skip at the beginning of the list returned.
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    Calling this function may result in the messagesFound() and progressChanged() 
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    signals being emitted multiple times. An emission of the progressChanged()
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    signal with a total of 0 indicates that the number of progress steps is
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    unknown.
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    The performance of querying messages is currently significantly less than 
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    optimal for some querying criteria on some platforms.
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    Returns true if the operation can be initiated; otherwise returns false.
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    Note: This function should not initiate network activity, instead only message data
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    already stored on the device will be used during evaluation of the function.
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    \sa  QMessage, QMessageFilter, QMessageSortOrder, messagesFound(), progressChanged(), countMessages()
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*/
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/*!
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    \fn QMessageService::countMessages(const QMessageFilter &filter)
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    Emits via a messagesCounted() signal the number messages in the messaging 
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    store matching \a filter.
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    Calling this function may result in the progressChanged() 
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    signal  being emitted multiple times. An emission of the progressChanged()
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    signal with a total of 0 indicates that the number of progress steps is
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    unknown.
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    The performance of counting messages is currently significantly less than optimal 
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    for some filters on some platforms.
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    Returns true if the operation can be initiated; otherwise returns false.
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    Note: This function should not initiate network activity, instead only message data
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    already stored on the device will be used during evaluation of the function.
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    \sa  QMessage, QMessageFilter, messagesCounted(), progressChanged(), queryMessages()
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*/
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/*!
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    \fn QMessageService::send(QMessage &message)
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    Transmit \a message using the account identified by the message's \l{QMessage::parentAccountId()}{parentAccountId} function.
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    If the message does not have a valid parentAccountId, it will be set to the 
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    result of QMessageAccount::defaultAccount() for the message's \l{QMessage::Type}{type}.
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    The message will be stored in the standard Outbox folder for the account before
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    transmission, or moved to that folder if it is already stored in another folder.
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    If transmission is successful, the message will be moved to the standard Sent
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    folder for the account.
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    Currently on the Maemo 5 (Fremantle) and Windows Mobile platforms the service 
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    action object enters the FinishedState when the message is queued for sending 
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    rather than actually sent.
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    Returns true if the operation can be initiated; otherwise returns false.
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    \sa QMessage, QMessageAccountId
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*/
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/*!
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    \fn QMessageService::compose(const QMessage &message)
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    Open a composer application using \a message as a prototype.
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    The default application for handling the type of \a message should be used.
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    Returns true if the operation can be initiated; otherwise returns false.
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    On the QMF platform implementation of this function is left as a task for system 
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    integrators.
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    \sa QMessage::type()
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*/
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/*!
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    \fn QMessageService::retrieveHeader(const QMessageId& id)
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    Retrieve meta data of the message identified by \a id.  
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    The meta data (including flags, from, to, subject, and date fields where applicable) of 
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    the message identified by \a id should be retrieved.  If only the message envelope
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    information is present, any other accessible header information should be retrieved.
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    If the message can not be found on the originating server it will be marked as removed.
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    Returns true if the operation can be initiated; otherwise returns false.
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    \sa QMessageId, QMessage::Removed
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*/
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/*!
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    \fn QMessageService::retrieveBody(const QMessageId& id)
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    Retrieve the body of the message identified by \a id.  
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    If the message can not be found on the originating server it will be marked as removed.
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    On the Symbian^3 platform this function is not yet supported.
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    Returns true if the operation can be initiated; otherwise returns false.
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    \sa QMessageId, QMessage::Removed
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*/
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/*!
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    \fn QMessageService::retrieve(const QMessageId &messageId, const QMessageContentContainerId& id)
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    Retrieve the container identified by \a messageId and \a id, the contents of the container should also be 
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    retrieved.
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    Returns true if the operation can be initiated; otherwise returns false.
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    \sa QMessageContentContainerId
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*/
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/*!
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    \fn QMessageService::show(const QMessageId& id)
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    Show the message identified by \a id.
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    The default application for handling the type of message that \a id identifies should be used.
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    Returns true if the operation can be initiated; otherwise returns false.
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    On the Maemo 5 (Fremantle) platform this function is not yet supported for SMS type messages.
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    On the QMF platform implementation of this function is left as a task for system 
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    integrators.
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    \sa QMessageId, QMessage::type()
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*/
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/*!
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    \fn QMessageService::exportUpdates(const QMessageAccountId &id)
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    Initiate synchronization with external servers of local changes that have been queued by message store operations, 
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    for messages with parent account \a id.
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    On Windows mobile and desktop platforms this function performs no operation, as when a connection is available, 
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    local changes are opportunistically synchronized with external servers.
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    Returns true if the operation can be initiated; otherwise returns false.
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    \sa QMessageManager::addMessage(), QMessageManager::updateMessage(), QMessageManager::removeMessage(), QMessageManager::removeMessages()
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*/
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/*!
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    \fn QMessageService::state() const
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    Returns the current state of the operation.
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    \sa stateChanged()
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*/
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/*!
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    \fn QMessageService::cancel()
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    Attempts to cancel the last requested operation.
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*/
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/*!
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    \fn QMessageService::stateChanged(QMessageService::State newState)
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    This signal is emitted when the state of the operation changes, with the new state described by \a newState.
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    \sa state()
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*/
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/*!
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    \fn QMessageService::messagesFound(const QMessageIdList &ids);
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    This signal is emitted when a queryMessages() operation has found
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    messages.
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    \a ids is the list of identifiers of messages found.
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    \sa queryMessages()
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*/
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/*!
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    \fn QMessageService::messagesCounted(int count);
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    This signal is emitted when a countMessages() operation has counted
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    messages.
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    \a count is the number of matching messages found.
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    \sa queryMessages()
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*/
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/*!
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    \fn QMessageService::progressChanged(uint value, uint total)
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    This signal is emitted when the operation operation has progressed.
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    \a total is the total number of progress steps to perform, or zero if
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    the number of progress steps is unknown.
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    \a value is the number of progress steps completed so far.
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*/
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/*!
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    \fn QMessageService::error() const
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    Returns a value indicating the last error condition encountered by the operation.
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*/
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#include "moc_qmessageservice.cpp"
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QTM_END_NAMESPACE