1 /*

     2 * Copyright (c) 2010 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:

    15 *

    16 * This class implements general wait object for calling

    17 * a callback function after subscribed P&S key value changes.

    18 *

    19 */

    20 

    21 #ifndef PROPERTYLISTENER_H

    22 #define PROPERTYLISTENER_H

    23 

    24 #include <e32base.h>

    25 #include <e32property.h>

    26 #include <jni.h>

    27 

    28 namespace java

    29 {

    30 namespace installer

    31 {

    32 

    33 /**

    34  * This class implements wait object for calling a callback

    35  * function after subscribed P&S key value changes.

    36  */

    37 NONSHARABLE_CLASS(CPropertyListener) : public CActive

    38 {

    39 public:  // Constructor and destructor

    40 

    41     static CPropertyListener* NewL(TUid aUid, TUint aKey);

    42 

    43     // Destructor.

    44     virtual ~CPropertyListener();

    45 

    46 private:

    47 

    48     // Constructor.

    49     CPropertyListener(TUid aUid, TUint aKey);

    50 

    51     // 2nd phase constructor.

    52     void ConstructL();

    53 

    54     // from base class CActive

    55 

    56     void RunL();

    57 

    58     void DoCancel();

    59 

    60 public: // Methods

    61 

    62     void ProcessEventsL(JNIEnv *aEnv, jobject aProvider);

    63 

    64 private: // Data

    65 

    66     CActiveScheduler* iActiveScheduler; // Owned

    67 

    68     RProperty iProperty; // Property to listen

    69     TUid iUid; // Property UID

    70     TUint iKey; // Property key

    71 

    72     JNIEnv *iEnv; // JNI environment, not owned

    73     jobject iProvider; // Callback object

    74     jmethodID iMethod; // Callback method

    75 

    76     TBool iCancelled;

    77 };

    78 

    79 } // installer

    80 } // java

    81 

    82 #endif // PROPERTYLISTENER_H