/*

* 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:  This class is responsible for loading and holding the 

*				 stratergy ecom plugin

*

*/

#ifndef C_LBTSTRATERGYCONTAINER_H

#define C_LBTSTRATERGYCONTAINER_H

// INCLUDE FILES

#include <e32base.h>

// FORWARD DECLARATIONS

class CLbtStrategyBase;

class REComSession;

class MLbtTriggeringSupervisionObserver;

/**

 * Class definition for LBT Stratergy container implementation

 * @since S60 v4.0

 *

 */

class CLbtStratergyContainer : public CActive

	{

	public:

		/**

	     * Instantiates a new object of 

	     * CLbtStratergyContainer

	     *

	     * @return a pointer to an instance of

	     * CLbtStratergyContainer

	     */

	    static CLbtStratergyContainer* NewL();

	    /**

	     * Destructor

	     *

	     */

	    ~CLbtStratergyContainer();

	    /**

	     * This loads the stratergy ecom plugin and starts 

	     * listening to ecom upgrade events.On receiving an

	     * ecom upgrade event, a check is made to determine if

	     * the stratergy plugin is upgraded. If the plugin is

	     * upgraded then the cuurently loaded plugin is unloaded

	     * and the new plugin is loaded.	     

	     *

	     * @param[in] the construction parameters to be sent to

	     * stratergy

	     *

	     */

	    void LoadStratergyL(MLbtTriggeringSupervisionObserver* aPtr);

	    /**

	     * Returns the intance of stratergy 

	     *

	     * @return pointer to the stratergy intance

	     */

	    CLbtStrategyBase* Stratergy();

	    /**

	     * Unloads the stratergy ecom dll and stops

	     * listening to ecom plugin upgrade events

	     *

	     */ 

	    void UnloadStratergy();

	protected: // from CActive		

		void RunL();

		TInt RunError(TInt aError);

		void DoCancel();

	private: 

	    /**

	     * C++ Default constructor

	     *

	     */

	    CLbtStratergyContainer();

		/**

	     * 2nd phase constuctor for instantiating 

	     * member variables

	     *

	     */

		void ConstructL();

	private: // Data

		// Instance of stratergy

		CLbtStrategyBase* iStratergy;

		// Handle to RProperty

		RProperty     iProperty;

        // Pointer to the ECom session

		REComSession* iEComSession;

		// Holds the version number of the currently 

		// loaded stratergy dll

		TInt iVersion;

	};

#endif // C_LBTSTRATERGYCONTAINER_H