// 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__