1 /*

     2 * Copyright (c) 2005-2006 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:  Publish and subscribe parameter observer implementation.

    15 *

    16 */

    17 

    18 

    19 #ifndef MAIPSPROPERTYOBSERVER_H

    20 #define MAIPSPROPERTYOBSERVER_H

    21 

    22 // INCLUDES

    23 #include <e32base.h>

    24 

    25 // CLASS DECLARATION

    26 

    27 /**

    28 *  It is the interface for handling property change events.

    29 *

    30 *  @since S60 3.2

    31 */

    32 class MAiPSPropertyObserver

    33     {

    34     public:

    35 	    

    36         /**

    37 	 	 * Get the current value of the key.

    38 	 	 * 

    39 	 	 * @since S60 3.2

    40 	 	 * @param aValue refrerence to an integer value of key

    41 	 	 * @return integer value of the error.

    42 	 	 */

    43         virtual TInt Get( TInt& aValue) = 0;

    44         

    45         /**

    46 	 	 * Get the current value of the key.

    47 	 	 * 

    48 	 	 * @since S60 3.2

    49 	     * @param aString reference to an 8-bit descriptor of the key

    50 	 	 * @return integer value of the error.

    51 	 	 */

    52         virtual TInt Get( TDes8& aString ) = 0;

    53         

    54         /**

    55 	 	 * Get the current value of the key.

    56 	 	 * 

    57 	 	 * @since S60 3.2

    58 	 	 * @param aString reference to an 16-bit descriptor of the key

    59 	 	 * @return integer value of the error.

    60 	 	 */

    61         virtual TInt Get( TDes16& aString ) = 0;

    62         

    63         /**

    64 	     * Release the observer

    65 	     */

    66         virtual void Release() = 0;

    67         

    68     protected:

    69         ~MAiPSPropertyObserver() { }

    70     };

    71 

    72 /**

    73  * Helper for calling MAiPSPropertyObserver::Release() with NULL checking.

    74  */

    75 inline void Release(MAiPSPropertyObserver* obj)

    76     {

    77     if (obj)

    78         {

    79         obj->Release();

    80         }

    81     }

    82 

    83 #endif      // MAIPSPROPERTYOBSERVER_H

    84 

    85 // End of File

    86