/*
* Copyright (c) 2004-2007 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: An interface for objects that can be written into stream.
*
*/
#ifndef MVPBKSTREAMABLE_H
#define MVPBKSTREAMABLE_H
// INCLUDES
#include <e32std.h>
// FORWARD DECLARATIONS
class RReadStream;
class RWriteStream;
// CLASS DECLARATIONS
/**
* An interface for objects that can be written into stream.
*/
class MVPbkStreamable
{
protected: // destructor
/**
* Destructor.
*/
virtual ~MVPbkStreamable() { }
public: // interface
/**
* Outputs this objects state to aStream.
*
* @param aStream A stream for writing the object state.
*/
virtual void ExternalizeL( RWriteStream& aStream ) const = 0;
/**
* Returns the externalized size of the object in bytes.
*
* @return The externalized size of the object.
*/
virtual TInt ExternalizedSize() const = 0;
/**
* Returns an extension point for this interface or NULL.
*
* @param aExtensionUid no extensions defined currently.
* @return An extension point for this interface or NULL.
*/
virtual TAny* StreamableExtension( TUid /*aExtensionUid*/ )
{ return NULL; }
};
#endif // MVPBKSTREAMABLE_H
//End of file