diff -r 000000000000 -r c53acadfccc6 metadataengine/client/inc/mdenotifierao.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/metadataengine/client/inc/mdenotifierao.h	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,164 @@
+/*
+* Copyright (c) 2005-2009 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:  Notifier client side active object
+*
+*/
+
+
+#ifndef __MDENOTIFIERAOAO_H__
+#define __MDENOTIFIERAOAO_H__
+
+// INCLUDE FILES
+#include <e32base.h>
+
+#include "mdccommon.h"
+#include "mdecondition.h"
+
+
+// forward declarations
+class RMdEEngineSession;
+class CMdESessionImpl;
+class CMdENamespaceDef;
+class CMdERelation;
+class TMdERelation;
+
+// local constants
+const TInt KDefaultBufferSize = 1024; // 1 KB
+/**
+* CMdENotifierAO
+* An active object that receives notifications from server
+* side whenever a registrated event has occurred.
+*/
+NONSHARABLE_CLASS(CMdENotifierAO) : public CActive
+    {
+    public: // Constructors and destructors
+
+		/**
+		 * Two-phased constructor.
+		 * @param aSessionImpl session impl
+		 * @param aSession the server handler
+		 * @return the created instance
+		 */
+		 static CMdENotifierAO* NewL(
+		     CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession );
+
+        /**
+        * Two-phased constructor.
+        * @param aSessionImpl session impl
+        * @param aSession the server handler
+        * @return the created instance
+        */
+        static CMdENotifierAO* NewLC(
+            CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession );
+
+        /**
+        * Destructor.
+        */
+        virtual ~CMdENotifierAO();
+
+        /**
+        * register for receiving events
+        * @param aMode observer mode: object, event or relation
+        * @param aObserver observer to be notified when event occurs
+        * @param aCondition condition when to notify
+        */
+        void RegisterL( TUint32 aType, TAny* aObserver, CMdECondition* aCondition, CMdENamespaceDef& aNamespaceDef );
+
+        /**
+        * compares an observer against one stored in this AO
+        * @param aMode observer mode: object, event or relation
+        * @param aObserver observer pointer
+        */
+        TBool Match( TUint32 aType, TAny* aObserver, CMdENamespaceDef& aNamespaceDef );
+
+        /**
+        * ID of this client side notifier object
+        */
+        TInt Id();
+
+    protected: // Functions from base classes
+
+        /**
+        * From CActive
+        * Callback function.
+        * Invoked to handle responses from the server.
+        */
+        void RunL();
+
+        /**
+        * From CActive
+        * Handles errors that occur during notifying the observer.
+        */
+        TInt RunError(TInt aError);
+
+        /**
+        * From CActive
+        * Cancels any outstanding operation.
+        */
+        void DoCancel();
+
+    private: // Constructors and destructors
+
+        /**
+        * constructor
+        * @param aSessionImpl session impl
+        * @param aSession the server handler
+        */
+        CMdENotifierAO(
+            CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession );
+
+        /**
+        * 2nd phase constructor
+        */
+        void ConstructL();
+
+        /**
+        * notify the corresponding client observer pointer
+        * @param aItem the item (in coded form) to be notified
+        * @param aStatus what has actually happened with the item
+        */
+        void DoNotifyObserver();
+		
+		
+		void DecodeIdBufferL();
+		void DecodeRelationItemBufferL();
+
+    private: // Data
+
+        /** the session impl. */
+        CMdESessionImpl& iSessionImpl;
+
+        /** the session */
+        RMdEEngineSession& iSession;
+
+        /** observer to be notified, actual class depends on type */
+        TAny* iObserver;
+
+        /** notifier type */
+        TUint32 iType;
+
+		/** Namespace definition's ID */
+        TDefId iNamespaceDefId;
+
+        /** size of result block */
+        TPckgBuf<TInt> iResultSize;
+
+        CMdCSerializationBuffer* iDataBuffer;
+
+		RArray<TItemId> iIdArray;
+
+		RArray<TMdERelation> iRelationItemArray;
+    };
+
+#endif //__MDENOTIFIERAOAO_H__