--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/harvester/common/src/propertywatcher.cpp	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,221 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  This implements CPropertyWatcher class.
+*
+*/
+
+
+// SYSTEM INCLUDE
+#include <e32base.h>
+#include <e32std.h>  // For DLL.
+
+// USER INCLUDE
+#include "propertywatcher.h"
+#include "harvesterlog.h" // For debugging.
+#include "listener.h" 
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::GetInstanceL
+// ---------------------------------------------------------------------------
+//
+EXPORT_C CPropertyWatcher* CPropertyWatcher::GetInstanceL() 
+    {
+    WRITELOG( "CPropertyWatcher::GetInstanceL() - begin" ); 
+  
+    CPropertyWatcher* me = NULL;
+    me = static_cast<CPropertyWatcher*>( Dll::Tls() );
+    if ( !me )
+        {
+        CPropertyWatcher* self = new( ELeave ) CPropertyWatcher();
+        User::LeaveIfError( Dll::SetTls( self ) );
+    
+        WRITELOG( "CPropertyWatcher::GetInstanceL() - end returning self" ); 
+        return self;	
+        }
+    else
+        {
+        WRITELOG( "CPropertyWatcher::GetInstanceL() - end returning me" ); 
+        return me;	
+        }			    
+    }
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::Delete
+// ---------------------------------------------------------------------------
+//	
+EXPORT_C void CPropertyWatcher::Delete()
+    {
+    WRITELOG( "CPropertyWatcher::Delete() - begin" ); 
+    
+    CPropertyWatcher *me = NULL;
+    me = static_cast<CPropertyWatcher*>( Dll::Tls() );
+    
+    if ( me )
+        {
+        delete me; 
+        Dll::SetTls( NULL ); // Free TLS.
+        }
+    
+    WRITELOG( "CPropertyWatcher::Delete() - end" ); 
+    }
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::ListenKeyChangesL
+// ---------------------------------------------------------------------------
+//
+EXPORT_C void CPropertyWatcher::ListenKeyChangesL( 
+		const TUid aPropertyCategory,
+		const TUint aKey,
+		const MKeyObserver* aValueObserver )
+    {
+	WRITELOG( "CPropertyWatcher::ListenKeyChanges() - begin" ); 
+
+	const TInt listenerIndex = FindListener ( aPropertyCategory, aKey ); // Finds listener.
+	if ( listenerIndex >=  0 )
+		{
+		iListenersArray[listenerIndex]->RegisterNewClientForKeyValueL( aValueObserver );
+		return;
+		}
+    
+	// Create new listener.
+	CListener* listener = CListener::NewLC( 
+			 aPropertyCategory,
+			 aKey
+			 ); 
+	 
+	listener->RegisterNewClientForKeyValueL( aValueObserver );
+	
+	// Add creted listener to array.
+	User::LeaveIfError( iListenersArray.Append( listener ) ); // Transfer ownership.
+	
+	CleanupStack::Pop( listener );
+
+	WRITELOG( "CPropertyWatcher::ListenKeyChanges() - end" ); 
+    }
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::ListenKeyAndStatusChanges
+// ---------------------------------------------------------------------------
+//
+EXPORT_C void CPropertyWatcher::ListenKeyAndStatusChangesL( 
+		const TUid aPropertyCategory,
+		const TUint aKey,
+		const MKeyAndStatusObserver* aStatusObserver )
+    {
+	WRITELOG( "CPropertyWatcher::ListenKeyAndStatusChanges - begin" ); 
+
+	const TInt listenerIndex = FindListener ( aPropertyCategory, aKey ); // Finds listener.
+	if ( listenerIndex >= 0 )
+		{
+		iListenersArray[listenerIndex]->RegisterNewClientForKeyAndStatusL( aStatusObserver );
+		return;
+		}
+    
+	// Create new listener.
+	CListener* listener = CListener::NewLC( 
+			 aPropertyCategory,
+			 aKey
+			 ); 
+	 
+	listener->RegisterNewClientForKeyAndStatusL( aStatusObserver );
+	
+	// Add created listener to array.
+	User::LeaveIfError( iListenersArray.Append( listener ) ); // Transfer ownership.
+	
+	CleanupStack::Pop( listener );
+	
+	WRITELOG( "CPropertyWatcher::ListenKeyChanges() - end" ); 
+    }
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::StopListeningKeyChanges
+// ---------------------------------------------------------------------------
+//	
+EXPORT_C void CPropertyWatcher::StopListeningKeyChanges( 
+		const TUid aPropertyCategory,
+		const TUint aKey,
+		const MKeyObserver* aKeyObserver )
+    {
+    WRITELOG( "CPropertyWatcher::StopListeningKeyChangesL() - begin" ); 
+	
+	const TInt listenerIndex = FindListener ( aPropertyCategory, aKey ); // Finds listener.
+	if ( listenerIndex >= 0 )
+		{
+		iListenersArray[listenerIndex]->UnregisterKeyClient( aKeyObserver );
+		}
+	
+	WRITELOG( "CPropertyWatcher::StopListeningKeyChangesL() - end" ); 
+    }
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::StopListeningKeyAndStatusChanges
+// ---------------------------------------------------------------------------
+//	
+EXPORT_C void CPropertyWatcher::StopListeningKeyAndStatusChanges( 
+		const TUid aPropertyCategory,
+		const TUint aKey,
+		MKeyAndStatusObserver* aStatusObserver )
+    {
+    WRITELOG( "CPropertyWatcher::StopListeningKeyAndStatusChanges() - begin" ); 
+	
+	const TInt listenerIndex = FindListener ( aPropertyCategory, aKey ); // Finds listener.
+	if ( listenerIndex >= 0 )
+		{
+		iListenersArray[listenerIndex]->UnregisterKeyAndStatusClient( aStatusObserver );
+		}
+	
+	WRITELOG( "CPropertyWatcher::StopListeningKeyAndStatusChanges() - end" ); 
+    }
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::~CPropertyWatcher
+// ---------------------------------------------------------------------------
+//	
+CPropertyWatcher::~CPropertyWatcher()
+	{
+	WRITELOG( "CPropertyWatcher::~CPropertyWatcher() - begin" ); 
+	
+	iListenersArray.ResetAndDestroy(); // Clean array and objects.
+	
+	WRITELOG( "CPropertyWatcher::~CPropertyWatcher() - end" ); 
+	}
+
+// ---------------------------------------------------------------------------
+// CPropertyWatcher::FindListener
+// ---------------------------------------------------------------------------
+//	
+TInt CPropertyWatcher::FindListener( const TUid aPropertyCategory, const TUint aKey )	const
+    {
+    WRITELOG( "CPropertyWatcher::FindListener() - begin" ); 
+	
+    TInt listenerIndex ( KErrNotFound );
+    
+    for ( TInt i = iListenersArray.Count(); --i >= 0; )
+    	{
+    	CListener& listenerItem = *iListenersArray[i];
+    	
+    	if ( aKey == listenerItem.ObservedKey() &&
+			aPropertyCategory == listenerItem.ObservedCategory() ) 
+			{
+			listenerIndex =  i; 
+			}
+		}
+	
+	WRITELOG( "CPropertyWatcher::FindListener() - end" ); 
+	return listenerIndex;
+    }
+
+// End of file.