/*

* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   Definition of MNcdSubscriptionOperationObserver interface

*

*/

#ifndef M_NCDSUBSCRIPTIONOPERATIONOBSERVER_H

#define M_NCDSUBSCRIPTIONOPERATIONOBSERVER_H

class MNcdSubscriptionOperation;

class TNcdProgress;

class MNcdQuery;

/**

 *  Observer interface for subscription operations.

 *

 *  Subscription operation users should implement this interface to be able to

 *  receive callbacks.

 */

class MNcdSubscriptionOperationObserver

    {

public:

    /**

     * Called when a subscription operation has progressed.

     *

     * @param aOperation The operation that sent the event.

     * @param aProgress Progress of the operation.

     */

    virtual void SubscriptionProgress( MNcdSubscriptionOperation& aOperation,

        TNcdProgress aProgress ) = 0;

    /**

     * Called when a query has been received for an operation.

     *

     * @param aOperation The operation that sent the event.

     * @param aQuery Pointer to the query object. Counted, Release() must be

     *  called after use.

     */

    virtual void QueryReceived( MNcdSubscriptionOperation& aOperation,

        MNcdQuery* aQuery ) = 0;

    /**

     * Called when an operation has been completed.

     *

     * @param aOperation The operation that sent the event.

     * @param aError Error code for operation completion. KErrNone for

     * successful completion, otherwise a system wide error code.

     */

    virtual void OperationComplete( MNcdSubscriptionOperation& aOperation,

        TInt aError ) = 0;

    };

#endif // M_NCDSUBSCRIPTIONOPERATIONOBSERVER_H