1 /*

     2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Templated algorithms to simplify object handling

    15 *

    16 */

    17 

    18 #ifndef PRESENCECACHEOBJECTHELPERS_H

    19 #define PRESENCECACHEOBJECTHELPERS_H

    20 

    21 #include <s32mem.h>

    22 

    23 

    24 const TInt KObjectBufGranurality = 100;

    25 

    26 

    27 

    28 

    29 /**

    30  * Templated object packer.

    31  *

    32  * Object type must support: NewLC(),

    33  * ExternalizeL() and InternalizeL().

    34  *

    35  * @since S60 v3.2

    36  */

    37 template< class T >

    38 class TCacheObjectPacker

    39     {

    40  public:

    41 

    42     /**

    43      * Templated method to pack object.

    44      *

    45      * Packs given object data to flat buffer and

    46      * returns buffer to caller.

    47      *

    48      * @param aObj Templated object to pack.

    49      *             Object type must support ExternalizeL() method.

    50      *

    51      * @return Buffer containing externalized object data.

    52      *         Buffer ownership is returned to caller.

    53      */

    54     static inline HBufC8* PackL( const T& aObj );

    55 

    56 

    57 

    58     /**

    59      * Templated method to unpack object.

    60      *

    61      * Extracts object data from given flat buffer and

    62      * returns objects ownership to caller.

    63      *

    64      * @param aObj Object which data to internalize from package.

    65      *             Concrete object type must support InternalizeL() method.

    66      *

    67      * @Param aPack Buffer containing object data.

    68      */

    69     static void UnPackL( T& aObj,

    70                          const TDesC8& aPack );

    71 

    72 private:   //Prohibited constructor

    73     TCacheObjectPacker();

    74 

    75     };

    76 

    77 

    78 #include "cacheobjecthelpers.inl"

    79 

    80 

    81 #endif // PRESENCECACHEOBJECTHELPERS_H