logexamplelogdatabaseobserver.cpp

专业的用于查询手机通话记录的代码

/*
 * ============================================================================
 *  Name     : CLogExampleLogDatabaseObserver from LogExampleLogDatabaseObserver.h
 *  Part of  : LogExample
 *  Created  : 26.05.2005 by Forum Nokia  
 *  Implementation notes:
 *  Version  : 1.0
 *  Copyright: Nokia Corporation
 * ============================================================================*/

// INCLUDE FILES
#include "LogExampleLogDatabaseObserver.h"
#include "DatabaseObserver.h"

// CONSTANTS
const TInt KSecond = 1000000;

// ========================= PUBLIC ========================= 

// ----------------------------------------------------------
// CLogExampleLogDatabaseObserver::
// CLogExampleLogDatabaseObserver():CActive(EPriorityStandard)
// Default Symbian constructor
// ----------------------------------------------------------
//
CLogExampleLogDatabaseObserver::CLogExampleLogDatabaseObserver(
    MDatabaseObserver& aObserver) :
    CActive(EPriorityStandard),
    iObserver(aObserver)
    {
    }

// ----------------------------------------------------
// CLogExampleLogDatabaseObserver::~CLogExampleLogDatabaseObserver()
// Destructor
// Frees reserved resources
// ----------------------------------------------------
//
CLogExampleLogDatabaseObserver::~CLogExampleLogDatabaseObserver()
    {
    Cancel();
    delete iLogClient;
    iFs.Close();
    }

// ----------------------------------------------------
// CLogExampleLogDatabaseObserver::NewL(MDatabaseObserver& aObserver)
// Symbian 2-phase constructor
// ----------------------------------------------------
//
CLogExampleLogDatabaseObserver* CLogExampleLogDatabaseObserver::NewL(
    MDatabaseObserver& aObserver)
    {
    CLogExampleLogDatabaseObserver* self =
        CLogExampleLogDatabaseObserver::NewLC(aObserver);
    CleanupStack::Pop(self);
    return self;
    }

// ----------------------------------------------------
// CLogExampleLogDatabaseObserver::NewLC( MDatabaseObserver& aObserver)
// Symbian 2-phase constructor
// ----------------------------------------------------
//
CLogExampleLogDatabaseObserver* CLogExampleLogDatabaseObserver::NewLC(
    MDatabaseObserver& aObserver)
    {
    CLogExampleLogDatabaseObserver* self =
        new (ELeave) CLogExampleLogDatabaseObserver(aObserver);
    CleanupStack::PushL(self);
    self->ConstructL(aObserver);
    return self;
    }

//======================= PRIVATE ====================== 

// ----------------------------------------------------
// CLogExampleLogDatabaseObserver::ConstructL(MDatabaseObserver& aObserver)
// Symbian 2-phase constructor
// ----------------------------------------------------
//
void CLogExampleLogDatabaseObserver::ConstructL(MDatabaseObserver& aObserver)
    {
    User::LeaveIfError(iFs.Connect());

    //establish connection to log engine
    iLogClient = CLogClient::NewL(iFs);

    iObserver = aObserver;
    CActiveScheduler::Add(this);
    }

// ----------------------------------------------------
// CLogExampleLogDatabaseObserver::RunL()
// RunL for active object
// ----------------------------------------------------
//
void CLogExampleLogDatabaseObserver::RunL()
    {
    if (iStatus != KErrNone)
        {
        iObserver.NotifyChangeL();
        NotifyChange(); // Set this observer again
        }
    }

// ----------------------------------------------------
// CLogExampleLogDatabaseObserver::DoCancel()
// Notifies client to cancel
// ----------------------------------------------------
//
void CLogExampleLogDatabaseObserver::DoCancel()
    {
    iLogClient->NotifyChangeCancel();
    }

// ----------------------------------------------------
// CLogExampleLogDatabaseObserver::NotifyChange()
// Notifies client of change
// ----------------------------------------------------
//
void CLogExampleLogDatabaseObserver::NotifyChange()
    {
    if (IsActive())
        {
        return;
        }
    iLogClient->NotifyChange(KSecond, iStatus);
    SetActive();
    }

//End of file