/*

* Copyright (c) 2009 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: ECOM Event watcher class, listens for ecom events

*

*/

#ifndef C_COMASUPLECOMEVENTWATCHER_H

#define C_COMASUPLECOMEVENTWATCHER_H

#include <e32base.h>

#include <ecom/ecom.h>

#include "epos_momasuplecomeventobserver.h"

// CLASS DECLARATION

/**

*  Class to listen for Ecom events

*/

class COMASuplEcomEventWatcher : public CActive

	{

	public: // enum

		enum TSuplEcomPlugInStatus

			{

				EExist,

				ENotExist

			} ;

	public:

		/**

		* NewL,constructor.

		* @since  S60 v3.1

		* @param  aSuplEcomEventObserver,observer for ecom-events

		* @param  aInterfaceUid,Interface id on which ecom will watch for events.

		* @param  aImplId,implementation id  on which ecom will watch for events.

		* @return Instance of COMASuplEcomEventWatcher.

		*/

        static COMASuplEcomEventWatcher* NewL(MSuplEcomEventObserver& aSuplEcomEventObserver, TUid aInterfaceUid, TUid aImplId);

		/**

		* ~COMASuplEcomEventWatcher,destructor.

		* @since  S60 v3.1

		* @param  None

		* @return None.

		*/

		virtual ~COMASuplEcomEventWatcher();

		/**

		* NotifyOnPlugInUnInstallation,notify about uninstallation of plugin

		* @since  S60 v3.1

		* @param  None.

		* @return None

		*/

		void NotifyOnPlugInUnInstallation();

	protected:  // From CActive

		/**

		* RunL,from CActive

		* @since  S60 v3.1

		* @param  None.

		* @return None

		*/

		void RunL();                

		/**

		* RunError,from CActive

		* @since  S60 v3.1

		* @param  aError,errocode if RunL leaves.

		* @return TInt

		*/

        TInt RunError(TInt aError);               

		/**

		* DoCancel,from CActive

		* @since  S60 v3.1

		* @param  None.

		* @return None

		*/

        void DoCancel();

	private:

		/**

		* COMASuplEcomEventWatcher,constructor.

		* @since  S60 v3.1

		* @param  aSuplEcomEventObserver,observer for ecom-events

		* @param  aInterfaceUid,Interface id on which ecom will watch for events.

		* @param  aImplId,implementation id  on which ecom will watch for events.

		* @return None

		*/

		COMASuplEcomEventWatcher(MSuplEcomEventObserver& aSuplEcomEventObserver, TUid aInterfaceUid, TUid aImplId);

		/**

		* ConstructL,Symbian 2nd phase construction

		* @since  S60 v3.1

		* @param  None.

		* @return None

		*/

		void	ConstructL();

		/**

		* IsImplementationExistL,checks wheather implementation exists or not.

		* @since  S60 v3.1

		* @param  None.

		* @return TBool

		*/

		TBool	IsImplementationExistL();

	private:

		/**

        * Reference to CSuplServer.

        */        

	    MSuplEcomEventObserver& 	iSuplEcomEventObserver;

	    /**

        * Address of REComSession.

        */        

	    REComSession* 				iEComSession;

	    /**

	    * Interface Id of respective Plug-In

	    */	    

	    TUid                        iPlugInInterfaceUid;

	    /**

        * Implementation Id of respective Plug-In

        */        

	    TUid 						iPlugInImplUid;

	    /**

        * Current status of this plug-in whether plug-in exists or not.

        */ 

	    TSuplEcomPlugInStatus       iSuplEcomPlugInStatus;  

	};

#endif // C_COMASUPLECOMEVENTWATCHER_H