--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/supl/locationomasuplprotocolhandler/protocolhandlerver2/src/epos_comasuplecomeventwatcher.cpp	Tue Feb 02 01:06:48 2010 +0200
@@ -0,0 +1,171 @@
+/*
+* Copyright (c) 2002-2005 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:   Observer of ECOM events. 
+*
+*/
+
+
+
+#include "epos_comasuplecomeventwatcher.h"
+
+
+// ================= MEMBER FUNCTIONS =======================
+
+//-------------------------------------------
+// Two phased constructor.
+//-------------------------------------------
+//
+COMASuplEcomEventWatcher* COMASuplEcomEventWatcher::NewL(MSuplEcomEventObserver& aSuplEcomEventObserver, TUid aInterfaceUid, TUid aImplId)
+	{
+	COMASuplEcomEventWatcher* self = new(ELeave) COMASuplEcomEventWatcher(aSuplEcomEventObserver, aInterfaceUid, aImplId);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop();
+	return self;
+	}
+	
+//-------------------------------------------
+// Constructor.
+//-------------------------------------------
+//
+COMASuplEcomEventWatcher::COMASuplEcomEventWatcher(MSuplEcomEventObserver& aSuplEcomEventObserver, TUid aInterfaceUid, TUid aImplId)
+ : CActive(EPriorityStandard),
+   iSuplEcomEventObserver(aSuplEcomEventObserver),
+   iPlugInInterfaceUid(aInterfaceUid),
+   iPlugInImplUid(aImplId),
+   iSuplEcomPlugInStatus(ENotExist)
+	{
+	CActiveScheduler::Add(this);
+	}
+
+//-------------------------------------------
+// ConstructL.
+//-------------------------------------------
+//
+void COMASuplEcomEventWatcher::ConstructL()
+	{
+	
+	REComSession& ecomSession = REComSession::OpenL();
+	
+	iEComSession = &ecomSession;
+	
+	TBool isImplPresent = IsImplementationExistL();	
+	if(isImplPresent == EFalse)
+		{
+		User::Leave(KErrNotFound);
+		}
+		
+	iSuplEcomPlugInStatus = EExist ;
+	
+	}
+
+//-------------------------------------------
+// Destructor.
+//-------------------------------------------
+//
+COMASuplEcomEventWatcher::~COMASuplEcomEventWatcher()
+	{
+	Cancel();
+	if(iEComSession)
+	iEComSession->Close();
+	}
+
+//---------------------------------------------------------------
+// Implementation of RunL.
+// RunL() calls observer method if there is any uninstallation in
+// already instantiated handler plug-in.
+//---------------------------------------------------------------
+//
+void COMASuplEcomEventWatcher::RunL()
+	{
+	// check plug-in unload
+	TBool isImplPresent = IsImplementationExistL();	
+		
+	if(isImplPresent == EFalse)	
+		{
+		if(iSuplEcomPlugInStatus == EExist)
+			{
+			iSuplEcomPlugInStatus = ENotExist ;
+			// here to inform observer
+			iSuplEcomEventObserver.PlugInUninstalled();	
+			}
+		}	
+
+	// request ecom framework for notification
+	iEComSession->NotifyOnChange(iStatus);
+	SetActive();	
+	}
+
+//-------------------------------------------
+// RunError.
+//-------------------------------------------
+//
+TInt COMASuplEcomEventWatcher::RunError(TInt /* aError */)
+	{
+	
+	return KErrNone;	
+	}
+
+//-------------------------------------------
+// DoCancel.
+//-------------------------------------------
+//
+void COMASuplEcomEventWatcher::DoCancel()
+	{
+	
+	// cancel request for ecom notification
+	iEComSession->CancelNotifyOnChange(iStatus);
+	}
+	
+//-------------------------------------------------------------------------------------
+// IsImplementationExist.
+// This method checks the existance of specific plug-in and returns result accordingly.
+// (other items were commented in a header).
+//-------------------------------------------------------------------------------------
+//
+TBool COMASuplEcomEventWatcher::IsImplementationExistL()
+	{
+	TBool retVal = EFalse;
+    RImplInfoPtrArray implInfoArray;
+    
+	REComSession::ListImplementationsL(iPlugInInterfaceUid, implInfoArray);
+	TInt implementationCount = implInfoArray.Count();
+	
+	for(TInt loop=0; loop < implementationCount; loop++)
+		{
+		if(implInfoArray[loop]->ImplementationUid() == iPlugInImplUid)
+			{
+			retVal = ETrue;
+			break;
+			}
+		}
+	
+	implInfoArray.ResetAndDestroy();
+	
+    return retVal;
+	}
+
+// NotifyOnPlugInUnInstallation
+void COMASuplEcomEventWatcher::NotifyOnPlugInUnInstallation()
+	{
+	// request ecom framework for notification
+	iEComSession->NotifyOnChange(iStatus);
+	SetActive();		
+	}
+
+
+
+// end of file
+
+