diff -r e1b950c65cb4 -r 837f303aceeb epoc32/include/app/MVPbkContactStoreObserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/app/MVPbkContactStoreObserver.h	Wed Mar 31 12:33:34 2010 +0100
@@ -0,0 +1,163 @@
+/*
+* Copyright (c) 2004-2007 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:  An observer interface for contact store events
+*
+*/
+
+
+#ifndef MVPBKCONTACTSTOREOBSERVER_H
+#define MVPBKCONTACTSTOREOBSERVER_H
+
+
+// INCLUDES
+#include <e32std.h>
+
+// FORWARD DECLARATIONS
+class MVPbkContactStore;
+class MVPbkContactLink;
+
+// CLASS DECLARATIONS
+
+/**
+ * A class for a contact store event.
+ *
+ * The contact store event contains the type of the event and
+ * possibly a contact link to a changed contact.
+ */
+class TVPbkContactStoreEvent
+    {
+    public: // Types
+        /**
+         * The type of the event
+         */
+        enum TVPbkContactStoreEventType
+            {
+            /// No event occured
+            ENullEvent,
+            /// A contact has been added to the contact store
+            EContactAdded,
+            /// A contact has been deleted from the contact store
+            EContactDeleted,
+            /// An existing contact in the contact store has been changed
+            EContactChanged,
+            /// A contact group has been added to the contact store
+            EGroupAdded,
+            /// A contact group has been deleted from the contact store
+            EGroupDeleted,
+            /// An existing contact group in the contact store has been changed
+            EGroupChanged,
+            /// Contact store backup is beginning
+            EStoreBackupBeginning,
+            /// Contact store restore is beginning
+            EStoreRestoreBeginning,
+            /// Contact store backup or restore is completed
+            EStoreBackupRestoreCompleted,
+            /// There has been some unknown changes in the contact store
+            EUnknownChanges
+            };
+
+    public: // Interface
+        /**
+         * Constructor
+         *
+         * @param aEventType The type of the contact store event
+         * @param aContactLink The identifier of the changed contact or NULL.
+         *                     The link is not owned by this class.
+         */
+        TVPbkContactStoreEvent(
+                TVPbkContactStoreEventType aEventType, 
+                MVPbkContactLink* aContactLink);
+
+    public: // Contact store event data
+        /// Own: Type of the event that has happened
+        TVPbkContactStoreEventType iEventType;
+        /// Ref: Link to the contact that is accociated with the event or NULL. 
+        ///      The link is valid only during HandleStoreEventL function call
+        ///      and client can not take the ownership of the instance.
+        //       Client must clone the link if it needs it later.
+        MVPbkContactLink* iContactLink;
+        ///Own: Spare for future extension
+        TAny* iSpare;
+        ///Own: Spare for future extension
+        TAny* iSpare2;
+    };
+
+inline TVPbkContactStoreEvent::TVPbkContactStoreEvent(
+        TVPbkContactStoreEventType aEventType, 
+        MVPbkContactLink* aContactLink) :
+    iEventType(aEventType),
+    iContactLink(aContactLink)
+    {
+    }
+
+/**
+ * An observer interface for contact store events
+ *
+ * The client of the contact store must implement this interface. The contact
+ * store informs client about its state using this interface. The client is
+ * also able to get store events about changes in the store content.
+ */
+class MVPbkContactStoreObserver
+    {
+    public:  // New functions
+        /**
+         * Called when a contact store is ready to use.
+         *
+         * @param aContactStore The store that is ready.
+         */
+        virtual void StoreReady(MVPbkContactStore& aContactStore) =0;
+
+        /**
+         * Called when a contact store becomes unavailable.
+         *
+         * Client may inspect the reason of the unavailability and decide
+         * whether or not it will keep the store opened (ie. listen to 
+         * the store events).
+         *
+         * @param aContactStore The store that became unavailable.
+         * @param aReason The reason why the store is unavailable.
+         *                This is one of the system wide error codes.
+         */
+        virtual void StoreUnavailable(MVPbkContactStore& aContactStore, 
+                TInt aReason) =0;
+
+        /**
+         * Called when changes occur in the contact store.
+         *
+         * @see TVPbkContactStoreEvent
+         * @param aContactStore A store whose event it is.
+         * @param aStoreEvent The event that has occurred.
+         */
+        virtual void HandleStoreEventL(
+                MVPbkContactStore& aContactStore, 
+                TVPbkContactStoreEvent aStoreEvent) =0;
+
+        /**
+         * Returns an extension point for this interface or NULL.
+         *
+         * @param aExtensionUid no extensions defined currently.
+         * @return an extension point for this interface or NULL.
+         */
+        virtual TAny* ContactStoreObserverExtension(TUid /*aExtensionUid*/) 
+                { return NULL; }
+
+    protected:  // Destructor
+        virtual ~MVPbkContactStoreObserver() { }
+
+    };
+
+
+#endif  // MVPBKCONTACTSTOREOBSERVER_H
+
+//End of file