1 // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef __CACHEBASE_H__

    17 #define __CACHEBASE_H__

    18 

    19 #include <e32base.h>

    20 #include <e32cmn.h>

    21 

    22 /**

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

    24 */

    25 NONSHARABLE_CLASS(CCacheBase): public CBase

    26 	{	

    27 public:	

    28 	void BeginUpdate();	

    29 	void EndUpdate();

    30 

    31 protected:

    32 	CCacheBase();

    33 	~CCacheBase();

    34 	

    35 	virtual TInt UseL(TInt aHandle) = 0;

    36 	virtual const CBase* Resolve(TInt aHandle);

    37 	

    38 protected:

    39 	struct TCacheEntry

    40 		{

    41 		TCacheEntry(TInt aHandle)

    42 			{

    43 			iHandle = aHandle;

    44 			}

    45 			

    46 		TInt iHandle;

    47 		TBool iIsUsed;

    48 		CBase* iCachedItem;

    49 		};

    50 

    51 protected:		

    52 	RArray<TCacheEntry> iCachedItems;

    53 	};

    54 	

    55 #endif //__CACHEBASE_H__

    56 

    57 

    58 

    59