/*

* Copyright (c) 2006 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:   Contains MStorable interface

*

*/

#ifndef M_NCD_STORABLE_H

#define M_NCD_STORABLE_H

// RWriteStream, RReadStream

#include <s32strm.h> 

/**

 * Interface for items that may be inserted to the database.

 *

 * @note Objects that are inserted to the database should

 * implement MNcdStorageDataItem-interface. This interface

 * is meant for the objects that MNcdStorageDataItem-object

 * may want to insert to the database. In other words,

 * MNcdStorageDataItem-forwards InternalizeL and ExternalizeL

 * calls to the objects that implement this interface.

 *

 */

class MNcdStorable

{

public:

    /** 

     * Destructor

     *

     * By safety reasons it is always good idea to implement

     * virtual destructor for interfaces. If the object

     * is deleted using this interface, then also destructors

     * of child classes will be called.

     */

    virtual ~MNcdStorable() { }

    /**

     * Writes the implementing object's data to the stream

     *

     * @param aStream Write stream

     */

    virtual void ExternalizeL( RWriteStream& aStream ) = 0;

    /**

     * Reads the implementing object's data from the stream

     * 

     * @param aStream Read stream

     */

    virtual void InternalizeL( RReadStream& aStream ) = 0;    

};

#endif // M_NCD_STORABLE_H