/*

* Copyright (c) 2005 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: class handles event notification to subscribers.

*

*

*/

#ifndef CPOSLMDBMANEVENTHANDLER_H

#define CPOSLMDBMANEVENTHANDLER_H

// INCLUDES

#include <e32base.h>

#include <badesca.h>

#include <EPos_TPosLmDatabaseEvent.h>

// CLASS DECLARATION

/**

* This class handles event notification to subscribers.

*/

class CPosLmDbManEventHandler : public CBase

    {

    public:  // Constructor & Destructor

        /**

        * Two-phased constructor.

        */

        static CPosLmDbManEventHandler* NewL();

        /**

        * Destructor.

        */

        ~CPosLmDbManEventHandler();

    public:     // New functions

        /**

        * Returns the database URI from last event to client.

        *

        * @param aMessage A message.

        */

        void ServerUriFromLastEvent(

        /* IN */        const RMessagePtr2& aMessage

        );

        /**

        * If there is at least one event waiting in the event queue, this

        * message will be completed directly. Otherwise the message will be

        * put on hold until an event arrives.

        *

        * @param aMessage A message.

        */

        void HandleRequestForEventL(

        /* IN */        const RMessagePtr2& aMessage

        );

        /**

        * Called when a landmark operation has generated an event.

        * If there is a message waiting for an event it will be completed

        * directly. Otherwise this event will be put in the event queue.

        *

        * @param aEvent An event.

        * @param aUri A database URI.

        */

        void HandleIncomingEventL(

        /* IN */        TPosLmDatabaseEvent aEvent,

        /* IN */        const TDesC& aUri

        );

        /**

        * Completes an outstanding event if it exists.

        *

        * @param aError The error code to complete with.

        */

        void CompleteAnyOutStandingRequest(

        /* IN */        TInt aError

        );

    private:

        /**

        * C++ default constructor.

        */

        CPosLmDbManEventHandler();

        /**

        * By default Symbian 2nd phase constructor is private.

        *

        */

        void ConstructL();

        void WriteEventAndComplete(

        /* IN */        const RMessagePtr2& aMessage

        );

        void AddToEventQueueL(

        /* IN */        TPosLmDatabaseEvent aEvent,

        /* IN */        const TDesC& aUri

        );

        // By default, prohibit copy constructor

        CPosLmDbManEventHandler( const CPosLmDbManEventHandler& );

        // Prohibit assigment operator

        CPosLmDbManEventHandler& operator= ( const CPosLmDbManEventHandler& );

    private:    // Data

        RArray<TPosLmDatabaseEvent> iEventQueue;

        RMessagePtr2 iHoldingMessage;

        CDesCArrayFlat* iUriArray;

        HBufC* iLastUri;

    };

#endif  // CPOSLMEVENTHANDLER_H

// End of File