diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/mw/mclfcontentlistingengine.h
--- a/epoc32/include/mw/mclfcontentlistingengine.h	Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/mw/mclfcontentlistingengine.h	Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,179 @@
-mclfcontentlistingengine.h
+/*
+* Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+* which accompanies this distribution, and is available
+* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#ifndef MCLFCONTENTLISTINGENGINE_H
+#define MCLFCONTENTLISTINGENGINE_H
+
+//  INCLUDES
+#include <CLFContentListing.h>
+#include <e32std.h>
+
+// FORWARD DECLARATIONS
+class MCLFContentListingEngineExt;
+class MCLFChangedItemObserver;
+class MCLFItemListModel;
+class MCLFOperationObserver;
+class TResourceReader;
+class MCLFProcessObserver;
+
+// CLASS DECLARATION
+
+/**
+*  Content Listing Engine.
+*  With Content Listing Engine, client can create item list models,
+*  add an observer to get notifications of changed items and
+*  send update notifications to server.
+*  Client can create an instance this class with ContentListingFactory.<br><br>
+*  Usage:
+*
+*  @code
+*
+*  // Create a new instance with Content Listing Factory
+*  MCLFContentListingEngine* engine =
+*                    ContentListingFactory::NewContentListingEngineLC();
+*
+*  // Add changed item observer
+*  engine->AddChangedItemObserverL( *myObserver );
+*
+*  // Send update notification when item is changed.
+*  engine->UpdateItemsL();
+*
+*  // Remember to remove the observer, when it is deleted
+*  engine->RemoveChangedItemObserver( *myObserver );
+*
+*  @endcode
+*
+*  @lib ContentListingFramework.lib
+*  @since S60 3.1
+*/
+class MCLFContentListingEngine
+    {
+    public: // Constructors and destructor
+
+        /**
+        * Destructor.
+        */
+        virtual ~MCLFContentListingEngine() {}
+
+    public: // New functions
+
+        /**
+        * Create a new instance of the Item List Model.
+        * @since S60 3.1
+        * @param aObserver Reference to an Operation Observer
+        * @return New instance of the Item List Model.
+        *         Ownership is transfered to the client application.
+        */
+        virtual MCLFItemListModel* CreateListModelLC(
+                        MCLFOperationObserver& aObserver ) = 0;
+
+        /**
+        * Create a new instance of Item List Model from the application
+        * resource.
+        * @since S60 3.1
+        * @param aObserver Reference to an Operation Observer.
+        * @param aResource Resource reader to list model resource.
+        *                  Use resource struct CLF_LIST_MODEL. See
+        *                  CLFContentListing.rh
+        * @return New instance of Item List Model.
+        *         Ownership is transfered to the client application.
+        */
+        virtual MCLFItemListModel* CreateListModelLC(
+                        MCLFOperationObserver& aObserver,
+                        TResourceReader& aResource ) = 0;
+
+        /**
+        * Add a changed item observer to the Engine.
+        * Changed item observer will notify you when items are changed, added
+        * or removed. Remember to remove the observer before you delete
+        * observer object.
+        * @since S60 3.1
+        * @param aObserver Changed item observer to be added
+        */
+        virtual void AddChangedItemObserverL(
+                        MCLFChangedItemObserver& aObserver ) = 0;
+
+        /**
+        * Remove a changed item observer from the Engine.
+        * @since S60 3.1
+        * @param aObserver Changed item observer to be removed
+        */
+        virtual void RemoveChangedItemObserver(
+                        MCLFChangedItemObserver& aObserver ) = 0;
+
+        /**
+        * Add CLF process observer.
+        * Remember to remove the observer before delete the observer object.
+        * @since S60 3.1
+        * @param aObserver Process observer to be added
+        */
+        virtual void AddCLFProcessObserverL(
+                        MCLFProcessObserver& aObserver ) = 0;
+
+        /**
+        * Remove CLF process observer.
+        * @since S60 3.1
+        * @param aObserver Process observer to be removed
+        */
+        virtual void RemoveCLFProcessObserver(
+                        MCLFProcessObserver& aObserver ) = 0;
+
+        /**
+        * Send item update notification.
+        * Client must use this method when media item(s) is changed or deleted.
+        * This method call will request the CLF server to update its list
+        * of items. Unneccesary update notifications should be avoided because
+        * they generate load to the system!
+        * @since S60 3.1
+        */
+        virtual void UpdateItemsL() = 0;
+
+        /**
+        * Send item update notification.
+        * Client must use this method when media item(s) is changed or deleted.
+        * This method call will request the CLF server to update items that are
+        * defined in the TArray.
+        * @since S60 3.1
+        * @param aItemIDArray List of Item IDs of modified items
+        */
+        virtual void UpdateItemsL(
+                        const TArray<TCLFItemId>& aItemIDArray ) = 0;
+
+        /**
+        * Send item update notification.
+        * Client must use this method when media item(s) is changed or deleted.
+        * @param aSemanticId Sematic ID is transfered to server plugins
+        * @param aOpaqueData Opaque data is transfered to server plugins
+        * @since S60 3.1
+        */
+        virtual void UpdateItemsL(
+                        TInt aSemanticId,
+                        const TDesC8& aOpaqueData ) = 0;
+
+    private: // Extension interface
+
+        /**
+        * This member is internal and not intended for use.
+        */
+        virtual MCLFContentListingEngineExt* Extension() { return NULL; }
+
+    };
+
+#endif      // MCLFCONTENTLISTINGENGINE_H
+
+// End of File