/*+
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).+
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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*+
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* Description:   ?Description+
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*+
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*/+
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	+
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+
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#ifndef M_NCD_OPERATION_OBSERVER_H+
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#define M_NCD_OPERATION_OBSERVER_H+
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+
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#include <e32cmn.h>+
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+
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class CNcdBaseOperation;+
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class CNcdQuery;+
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class CNcdExpiredNode;+
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+
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/**+
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 *  Server side observer interface for operations.+
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 *+
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 *  This interface offers child operations a way to inform their parent+
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 *  operations of progress and completion events. It is also used +
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 *  to pass querys and expiration info to proxy side as sub-ops don't+
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 *  usually have proxys.+
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 *+
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 *  @since S60 v3.2+
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 */+
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class MNcdOperationObserver+
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    {+
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    +
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public:+
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+
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    /**+
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     * Called when progress is made in the sub-op. +
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     * Should be used only if the parent really needs the progress information+
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     * for e.g. forwarding it to the proxy.+
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     *+
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     * @param aOperation The calling sub-op.+
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     */+
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    virtual void Progress( CNcdBaseOperation& aOperation ) = 0;+
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    +
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    /**+
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     * Called when sub-op has received a query.+
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     *+
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     * @param aOperation The calling sub-op.+
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     * @param aQuery The query to forward.+
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     */+
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    virtual void QueryReceived( CNcdBaseOperation& aOperation,+
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                                CNcdQuery* aQuery ) = 0;+
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+
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    /**+
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     * Called when a sub-operation has been completed.+
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     *+
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     * @param aOperation The calling sub-op.+
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     * @param aOperation aError KErrNone if completed correctly otherwise+
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     *        system-wide error code.+
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     */+
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    virtual void OperationComplete( CNcdBaseOperation* aOperation,+
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                                    TInt aError ) = 0;+
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                                    +
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    /**+
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     * Called when a sub-op has expired nodes.+
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     *+
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     * @param aOperation The calling sub-op.+
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     * @param aOperation Expired nodes.+
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     */+
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    virtual void ExpirationInfoReceived( CNcdBaseOperation* aOperation,+
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        RPointerArray<CNcdExpiredNode>& aExpiredNodes ) = 0;+
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    };+
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    +
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#endif //  M_NCD_OPERATION_OBSERVER_H+
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