/*

* Copyright (c) 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:

*

*/

#ifndef CDLCHANGEOBSERVER_H

#define CDLCHANGEOBSERVER_H

#include <e32base.h>

#include "CdlEngine.h"

#include "CdlClientServerStd.h"

class RCdlSession;

class CCdlEngine;

/**

* Active object that watches out for changes from the CDL server.

*/

NONSHARABLE_CLASS(CCdlChangeMonitor) : public CActive

	{

public:

	CCdlChangeMonitor(RCdlSession& aServer, CCdlEngine* aEngine);

	~CCdlChangeMonitor();

private:

	void Queue();

	void RunL();

	void DoCancel();

	void ProcessL();

private:

	RCdlSession& iServer;

	CCdlEngine* iEngine;					// not owned

	TPckgBuf<SCdlServerChange> iChange;

	};

/**

* CCdlChangeObserver records all the UIDs that a particular observer is interested in

*/

NONSHARABLE_CLASS(CCdlChangeObserver) : public CBase

	{

public:

	static CCdlChangeObserver* NewLC(MCdlChangeObserver* aObserver, TUid aUid);

	static CCdlChangeObserver* NewLC(MCdlChangeObserver* aObserver);

	~CCdlChangeObserver();

	MCdlChangeObserver* Observer() const;

	void AddUidL(TUid aUid);

	void HandleCustomisationChangeL(const CCdlUids& aUids);

	void HandleAvailableRefsChangeL();

private:

	MCdlChangeObserver* iObserver;			// not owned

	CCdlUids iUids;

	};

/**

* Collection of CCdlChangeObserver objects.

*/

NONSHARABLE_CLASS(CCdlChangeObservers) : public CBase

	{

public:

	CCdlChangeObservers();

	~CCdlChangeObservers();

	void AddCustomisationChangeObserverL(MCdlChangeObserver* aObserver, TUid aUid);

	void AddGeneralChangeObserverL(MCdlChangeObserver* aObserver);

	void RemoveChangeObserver(MCdlChangeObserver* aObserver);

	void HandleCustomisationChangeL(const CCdlUids& aUids);

	void HandleAvailableRefsChangeL();

private:

	TInt FindIndex(MCdlChangeObserver* aObserver) const;

private:

	typedef CArrayPtrFlat<CCdlChangeObserver> CCdlChangeObserverArray;

	CCdlChangeObserverArray iObservers;		// contained CCdlChangeObservers are owned

	};

#endif