/*

* Copyright (c) 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:  Extension to lockapp clients.

 *

*/

#ifndef __LOCKACCESSEXTENSION_H__

#define __LOCKACCESSEXTENSION_H__

#include <e32base.h>

class RWsSession;

/**

 *  RLockAccessExtension class.

 *  Extension class used to access lockapp.

 *

 *  @lib    lockclient

 *  @since  5.0

 *  @author Tamas Koteles

 */

class RLockAccessExtension : public RSessionBase

	{

	public:

		/**

		 * From @c RSessionBase. Sends a message.

		 * @return KErrNone if succeeded or already connected.

		 *         KErrNotReady if the server is not yet fully initialized.

		 *         otherwise standard RSessionBase error values.

		 */

		TInt SendMessage( TInt aMessage );

		/**

		 * From @c RSessionBase. Sends a message with a parameter.

		 * @return KErrNone if succeeded or already connected.

		 *         KErrNotReady if the server is not yet fully initialized.

		 *         otherwise standard RSessionBase error values.

		 */

		TInt SendMessage( TInt aMessage, TInt aParam1 );

		/**

		 * From @c RSessionBase. Sends a message with two parameter.

		 * @return KErrNone if succeeded or already connected.

		 *         KErrNotReady if the server is not yet fully initialized.

		 *         otherwise standard RSessionBase error values.

		 */

		TInt SendMessage( TInt aMessage, TInt aParam1, TInt aParam2 );

	private:

		/**

		 * Returns the server's version.

		 */

		TVersion GetVersion( );

		/**

		 * Tries to create session to service.

		 * Must be called before accessing other methods in the API.

		 *

		 * @return KErrNone if succeeded or already connected.

		 *         KErrNotReady if the server is not yet fully initialized.

		 *         KErrNotSupported if the CoeEnv is not available

		 *         otherwise standard RSessionBase error values.

		 */

		TInt TryConnect( RWsSession& aWsSession );

		/**

		 * Ensures that the connection to the service is alive.

		 * Tries to connect to service if not connected.

		 *

		 * @return KErrNone if succeeded or already connected.

		 *         KErrNotReady if the server is not yet fully initialized.

		 *         KErrNotSupported if the CoeEnv is not available

		 *         otherwise standard RSessionBase error values.

		 */

		TInt EnsureConnected( );

	};

#endif // __LOCKACCESSEXTENSION_H__