--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/app/MVPbkOperationObserver.h	Wed Mar 31 12:33:34 2010 +0100
@@ -0,0 +1,96 @@
+/*
+* Copyright (c) 2005-2007 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 interfaces for asynchronous operations
+*
+*/
+
+
+#ifndef VPBKOPERATIONOBSERVER_H
+#define VPBKOPERATIONOBSERVER_H
+
+// INCLUDES
+#include <e32base.h>
+
+class MVPbkContactOperationBase;
+// CLASS DECLARATION
+
+/**
+ * An observer for asynchronous operations that do not return anything.
+ */
+class MVPbkOperationObserver
+    {
+    public:
+
+    	/**
+    	 * The operation was completed succesfully.
+    	 * 
+    	 * @param aOperation operation handle
+    	 */
+        virtual void VPbkOperationCompleted(
+                MVPbkContactOperationBase* aOperation ) = 0;
+
+    protected:
+        /* Destroying via this interface is not allowed */
+        ~MVPbkOperationObserver(){}
+    };
+
+/**
+ * An observer for asynchronous operations
+ * that return result of ResultType type.
+ */
+template<typename ResultType>
+class MVPbkOperationResultObserver
+    {
+    public:
+
+        /**
+         * The operation was completed succesfully.
+         * 
+         * @param aOperation operation handle
+         * @param aOperationResult operation result
+         */
+        virtual void VPbkOperationResultCompleted(
+                MVPbkContactOperationBase* aOperation,
+                ResultType aOperationResult ) = 0;
+        
+    protected:
+        /* Destroying via this interface is not allowed */
+        ~MVPbkOperationResultObserver(){}
+    };
+
+/**
+ * An observer for asynchronous operations 
+ * to receive error notifications when an operation fails.
+ */
+class MVPbkOperationErrorObserver
+    {
+    public:
+        
+        /**
+         * An error occured in the operation that was requested.
+         * 
+         * @param aOperation operation handle 
+         * @param aError Operation error code.
+         */
+        virtual void VPbkOperationFailed(
+                MVPbkContactOperationBase* aOperation,
+                TInt aError ) = 0;
+        
+    protected:
+        /* Destroying via this interface is not allowed */
+        ~MVPbkOperationErrorObserver(){}
+    };
+
+#endif //VPBKOPERATIONOBSERVER_H
+//End of file