diff -r 000000000000 -r 7f85d04be362 upnpavcontroller/upnpavcontrollerhelper/inc/upnpabstractbrowsingsessionobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upnpavcontroller/upnpavcontrollerhelper/inc/upnpabstractbrowsingsessionobserver.h	Thu Dec 17 08:52:00 2009 +0200
@@ -0,0 +1,178 @@
+/*
+* Copyright (c) 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 abstract browsing session observer implementation
+*
+*/
+
+
+
+
+
+
+#ifndef UPNPABSTRACTBROWSINGSESSIONOBSERVER_H
+#define UPNPABSTRACTBROWSINGSESSIONOBSERVER_H
+
+//  INCLUDES
+#include <e32base.h>
+#include "upnpavbrowsingsessionobserver.h" // base class
+
+// FORWARD DECLARATIONS
+class MUPnPAVBrowsingSession;
+
+// CLASS DECLARATION
+
+/**
+* An abstract class for implementing a browsing session observer.
+* This class is purposed as a base class for imnplementing a
+* browsing observer. There are 2 main use cases:
+* 1. reducing implementation code so that the actual observer will
+*    only need to write the observer methods that are really used.
+* 2. implementing an observer proxy that will attach itself to a session
+*    and just handle some of the callbacks and forward a majority of the
+*    callbacks the original session observer.
+*
+* @lib upnpavcontrollerhelper.lib
+* @since S60 3.2
+*/
+class CUPnPAbstractBrowsingSessionObserver
+    : public CBase
+    , public MUPnPAVBrowsingSessionObserver
+    {
+
+public: // construction/destruction
+
+    /**
+     * default constructor.
+     */
+    IMPORT_C CUPnPAbstractBrowsingSessionObserver();
+
+    /**
+     * destructor
+     */
+    IMPORT_C virtual ~CUPnPAbstractBrowsingSessionObserver();
+
+
+public: // the abstract observer interface
+
+    /**
+     * Sets the host session for the observer. This is the session where
+     * the observer will register for callbacks. If the session already
+     * has an observer, it will become the proxy observer. The default
+     * implementatin for all observer methods is to forward the method to
+     * the observer, if it exists.
+     *
+     * @since S60 3.2
+     * @param aHostSession, browsing session
+     */
+    IMPORT_C void SetSession( MUPnPAVBrowsingSession& aHostSession );
+
+    /**
+     * Enables receiving callbacks. When enabled, the abstract observer
+     * registers to the given session and thus starts receiving callbacks.
+     * Note that only those callbacks that are overwritten in the derived
+     * class will actually provide some value. Other will be either processed
+     * in an empty method, or forwarded to the observer that previously was
+     * registered as an observer (proxy mode)
+     *
+     * @since S60 3.2
+     */
+    IMPORT_C void EnableSessionObserver();
+
+    /**
+     * Disables receiving session callbacks. The observer interface is
+     * deregistered, and if before observer registration there was an 
+     * original observer interface (proxy mode) the original observer
+     * is restored.
+     *
+     * @since S60 3.2
+     */
+    IMPORT_C void DisableSessionObserver();
+
+    /**
+     * Returns true if the observer is active (registered for events)
+     *
+     * @since S60 3.2
+     */
+    IMPORT_C TBool IsSessionObserverEnabled();
+
+public: // MUPnPAVBrowsingSessionObserver
+
+    /**
+     * see MUPnPAVBrowsingSessionObserver
+     */
+    void BrowseResponse(
+        const TDesC8& aBrowseResponse,
+        TInt aError,
+        TInt aMatches,
+        TInt aTotalCount,
+        const TDesC8& aUpdateId );
+
+    /**
+     * see MUPnPAVBrowsingSessionObserver
+     */
+    void SearchResponse( 
+        const TDesC8& aSearchResponse,
+        TInt aError,
+        TInt aMatches,
+        TInt aTotalCount,
+        const TDesC8& aUpdateId );
+
+    /**
+     * see MUPnPAVBrowsingSessionObserver
+     */
+    void SearchCapabilitiesResponse( 
+        TInt aError,
+        const TDesC8& aSearchCapabilities );
+
+    /**
+     * see MUPnPAVBrowsingSessionObserver
+     */
+    void CreateContainerResponse( TInt aError, 
+        const TDesC8& aObjectId );
+
+    /**
+     * see MUPnPAVBrowsingSessionObserver
+     */
+    void DeleteObjectResponse( TInt aError );
+
+    /**
+     * see MUPnPAVBrowsingSessionObserver
+     */
+    void ReserveLocalMSServicesCompleted( TInt aError );
+
+    /**
+     * see MUPnPAVBrowsingSessionObserver
+     */
+    void MediaServerDisappeared(
+        TUPnPDeviceDisconnectedReason aReason );
+
+
+private: // members
+
+    // the host browsing session. Note: NOT OWNED!
+    MUPnPAVBrowsingSession* iObservedSession;
+
+    // The proxy observer. Note: NOT OWNED!
+    MUPnPAVBrowsingSessionObserver* iProxyObserver;
+
+    // if observer is enabled
+    TBool iObserverEnabled;
+
+    };
+
+
+#endif  // UPNPABSTRACTBROWSINGSESSIONOBSERVER_H
+
+// End of File
+