// Copyright (c) 2006-2009 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 __CACHEBASE_H__

#define __CACHEBASE_H__

#include <e32base.h>

#include <e32cmn.h>

/**

A cache base-class providing basic functionality for resolving a cached item.

*/

NONSHARABLE_CLASS(CCacheBase): public CBase

	{	

public:	

	void BeginUpdate();	

	void EndUpdate();

protected:

	CCacheBase();

	~CCacheBase();

	virtual TInt UseL(TInt aHandle) = 0;

	virtual const CBase* Resolve(TInt aHandle);

protected:

	struct TCacheEntry

		{

		TCacheEntry(TInt aHandle)

			{

			iHandle = aHandle;

			}

		TInt iHandle;

		TBool iIsUsed;

		CBase* iCachedItem;

		};

protected:		

	RArray<TCacheEntry> iCachedItems;

	};

#endif //__CACHEBASE_H__