/*

* Copyright (c) 2005-2009 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:

* Abstract base class for usbman extension plugins.

*

*/

/**

 @file

 @publishedPartner

 @released

*/

#ifndef USBMANEXTENSIONPLUGIN_H

#define USBMANEXTENSIONPLUGIN_H

#include <e32base.h>

#include <d32usbc.h>

class MUsbmanExtensionPluginObserver;

class MUsbDeviceNotify;

/**

The UID of the Usbman Extension Plugin interface.

*/

const TInt KUsbmanExtensionPluginInterfaceUid = 0x10208DD6;

class CUsbmanExtensionPlugin : public CBase

	{

public:

	/** 

	Constructor.

	@param aImplementationUid The UID of the implementation.

	@param aObserver The observer of the plugin.

	*/

	IMPORT_C static CUsbmanExtensionPlugin* NewL(const TUid aImplementationUid, 

		MUsbmanExtensionPluginObserver& aObserver);

	/** Destructor. */

	IMPORT_C ~CUsbmanExtensionPlugin();

public:

	/**

	Called by Usbman server to get a pointer to an object which implements the 

	ExtensionPlugin interface with UID aUid. This is a mechanism for allowing future 

	change to the plugin API without breaking BC in existing (non-updated) 

	plugins.

	*/

	virtual TAny* GetInterface(TUid aUid) = 0;

protected:

	/** 

	Constructor.

	@param aObserver The observer of the plugin.

	*/

	IMPORT_C CUsbmanExtensionPlugin(MUsbmanExtensionPluginObserver& aObserver);

protected:

	/**

	Accessor for the observer.

	@return The observer.

	*/

	IMPORT_C MUsbmanExtensionPluginObserver& Observer();

private: // owned

	/**

	UID set by ECOM when the instance is created. Used when the instance is 

	destroyed.

	*/

	TUid iInstanceId;

private: // unowned

	MUsbmanExtensionPluginObserver& iObserver;

	};

#endif // USBMANEXTENSIONPLUGIN_H