/*

* 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:  Managing of events that are registered to Mediator

*

*/

#ifndef MEDIATORSERVEREVENTHANDLER_H

#define MEDIATORSERVEREVENTHANDLER_H

// INCLUDES

#include <e32base.h>

#include "MediatorCommon.h"

#include "MediatorServerObjectHandler.h"

#include "MediatorServiceDefs.h"

// FORWARD DECLARATIONS

class MMediatorServerEventObserver;

class CMediatorServerObjectHandler;

class CDomain;

class CCategory;

class CEvent;

class CItem;

class CCommand;

// NAMESPACE

using namespace MediatorService;

// CLASS DECLARATION

/**

*  Event handler class for Mediator Server.

*

*  @lib MediatorServer

*  @since S60 3.1

*/

class CMediatorServerEventHandler : public CActive

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        *

        * @param aObjectHandler object handler

        * @return a new CMediatorServerEventHandler instance

        */

        static CMediatorServerEventHandler* NewL( 

                    CMediatorServerObjectHandler& aObjectHandler );

        /**

        * Destructor.

        */

        virtual ~CMediatorServerEventHandler();

    public: // New functions

        /**

        * Register list of new events.

        * Checks that no existing events are registered

        * @since S60 3.1

        * @param aCategory  information for the category

        * @param aEvents    list of events to be registered

        * @param aSecureId  secure Id of the client

        * @return none.

        */

        void RegisterEventListL( TMediatorCategory aCategory, 

                                 const REventList& aEvents,

                                 TSecureId aSecureId );

        /**

        * Unregisters event(s)

        * 

        * @since S60 3.1

        * @param aCategory  information for the category

        * @param aEvents    list of events to be unregistered

        * @param aSecureId  secure Id of the client

        * @return none.

        */

        void UnregisterEventListL( TMediatorCategory aCategory, 

                                   const REventList& aEvents,

                                   TSecureId aSecureId  );   

        /**

        * Subscribes event(s)

        * 

        * @since S60 3.1

        * @param aCategory  Information for the category

        * @param aEvents    List of the events to be subscribed

        * @param aCaps      Capabilities of the subscriber

        * @param aObserver  Event observer instance

        * @return none.

        */

        void SubscribeEventListL( TMediatorCategory aCategory, 

                                  const REventList& aEvents,

                                  TCapabilitySet aCaps,

                                  MMediatorServerEventObserver* aObserver );

        /**

        * Unsubscribes event(s)

        *

        * @since S60 3.1

        * @param aCategory  information for the category

        * @param aEvents    List of the events to be unsubscribed.

        * @param aObserver  Event observer instance

        * @return none.

        */

        void UnsubscribeEventListL( TMediatorCategory aCategory, 

                                    const REventList& aEvents,

                                    MMediatorServerEventObserver* aObserver ); 

        /**

        * Raise Event

        * @since S60 3.1

        * @param aCategory  Information for the category

        * @param aEvent     Event information

        * @param aData      Event parameter data

        * @return none.

        */

        void RaiseEventL( TMediatorCategory aCategory, 

                          MediatorService::TEvent aEvent,

                          const TDesC8& aData );                                     

        /**

        * Returns count of events

        * @since S60 3.1

        * @return event count

        */

        TInt EventCount() { return iEventServiceList.Count(); }

    private: // From CActive

        /**

        * From CActive::RunL

        */

        void RunL();

        /**

        * From CActive::DoCancel()

        */

        void DoCancel();                                

    private:

        /**

        * C++ default constructor.

        *

        * @param aObjectHandler object handler

        */

        CMediatorServerEventHandler( 

                    CMediatorServerObjectHandler& aObjectHandler );

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

    private:    // Data

        // List of buffered events

        RPointerArray<CEvent>  iEventServiceList;

        // Handle to object handler

        CMediatorServerObjectHandler& iObjectHandler;

    };

#endif      // MEDIATORSERVEREVENTHANDLER_H   

// End of File