/*

* Copyright (c) 2005-2007 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:  Defines an observer to CPS

*

*/

#ifndef CPSOBSERVER_H

#define CPSOBSERVER_H

 // Forward declarations

class CLiwServiceHandler;

class CLiwCriteriaItem;

class MLiwInterface;

namespace cpswrapper

    {

    /**

      * Content publishing service wrapper namespace

      */

    // Forward declarations

    class CCpsWrapper;

    /**

	 *  Observer class for cps registry 

	 *

	 *  @code

	 *

	 *  @endcode

	 *

	 *  @lib cpswrapper.lib

	 *  @since S60 v5.0

	 */

    NONSHARABLE_CLASS( CCpsObserver ) : public CBase, public MLiwNotifyCallback

		{

		public: // Constructors and destructor

			/**

			 * Two-phased constructor.

			 */

			static CCpsObserver* NewLC( CCpsWrapper* aCpsWrapper);

			/**

			 * Destructor.

			 */

			~CCpsObserver();

		public:  //from MLiwNotifyCallback

			/**

			* Handles notifications caused by an asynchronous Execute*CmdL call

			* or an event.

			*

			* @param aCmdId The service command associated to the event.

			* @param aEventId Occured event, see LiwCommon.hrh.

			* @param aEventParamList Event parameters, if any, as defined per

			*        each event.

			* @param aInParamList Input parameters, if any, given in the

			*        related HandleCommmandL.

			* @return Error code for the callback.

			*/

			TInt HandleNotifyL(

				TInt aCmdId,

				TInt aEventId,

				CLiwGenericParamList& aEventParamList,

				const CLiwGenericParamList& aInParamList);

		public:

			/**

			* Registers to CPS for add, delete , update and execute notifications

			* 

			* @param aFilter - filter for input parameter list

			* @param aRegistry - registry to register observer

			*/

			void RegisterL( CLiwDefaultMap* aFilter,  const TDesC& aRegistry  );

			/**

			* Cancel all the registered notifications.

			*/

			void ReleaseL();

		private:

			/**

			* Perform the second phase construction 

			*/      

			void ConstructL( );

			/**

			* Constructor.

			* 

			* @param aCpsWrapper cps wrapper 

			*/

			CCpsObserver( CCpsWrapper* aCpsWrapper );

			/**

			* Initialise Liw connection to Content publishing service.

			*/

			void InitLiwL();

			/**

			* Closes Liw connection to Content publishing service.

			*/

			void ReleaseLiw();

		private: // data

			// Reference of MLiwInterface

			// Owned

			MLiwInterface* iInterface;

			// Reference of CLiwServiceHandler

			// Owned

			CLiwServiceHandler* iLiwHandler;	            

			// Reference of the CCpsWrapper

			// Not owned

			CCpsWrapper* iCpsWrapper;

			// Call back error code

			TInt iError;

		};

    }

#endif /* CPSOBSERVER_H_ */