/*

* Copyright (c) 2003 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:  Interface for message information of history file

*

*/

#ifndef __MCALOGGERMESSAGE_H__

#define __MCALOGGERMESSAGE_H__

//INCLUDES

#include <e32std.h>

//FORWARD DECLARATIONS

class RWriteStream;

// CLASS DECLARATION

/**

 *  Interface for message information of history file

 *

 *  @lib CALogger.dll

 *  @since 2.1

 */

class MCALoggerMessage

    {

    public:

        /**

         * Destructor.

         */

        virtual ~MCALoggerMessage() {};

    public: // Interface

        /**

         * Internalize the contact instance data.

         * Used by MCALoggerFactory.

         * @since 2.1

         * @param aStream The stream into which to internalize

         */

        virtual void InternalizeL( RReadStream& aStream ) = 0;

        /**

         * Externalize the contact instance data.

         * Used by CCALoggerWriter

         * @since 2.1

         * @param aStream The stream into which to externalize

         */

        virtual void ExternalizeL( RWriteStream& aStream ) const = 0;

        /**

         *	Disk space needed for saving message in externalize.

         *	@return Memory need in bytes.

         */

        virtual TInt MessageSizeInBytesL() const = 0;

    };

#endif      // __MCALOGGERMESSAGE_H__

// End of File