--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/satengine/SatServer/Engine/inc/TSatEventMediator.h	Tue Feb 02 01:11:09 2010 +0200
@@ -0,0 +1,131 @@
+/*
+* Copyright (c) 2002-2006 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:  Provides way to notify events and register observers
+*                for events
+*
+*/
+
+
+
+#ifndef TSATEVENTMEDIATOR_H
+#define TSATEVENTMEDIATOR_H
+
+//  INCLUDES
+#include <e32base.h>
+
+// FORWARD DECLARATIONS
+class MSatEventObserver;
+class TSatEventsObserver;
+
+// CLASS DECLARATION
+
+/**
+*  Provides way to notify events and register observers for events.
+*  Observers are not owned by this class and therefore observers are
+*  not deleted when TSatEventMediator instance is destroyed.
+*
+*  @lib SatEngine.dll
+*  @since Series 60 3.0
+*/
+class TSatEventMediator
+    {
+    public:  // Constructors and destructor
+
+        /**
+        * C++ default constructor.
+        */
+        TSatEventMediator();
+
+    public: // New functions
+
+        /**
+        * Notifies possible observers who are observing the event.
+        * @param aEvent Integer identifying the event.
+        * @return None
+        */
+        void Notify( TInt aEvent );
+
+        /**
+        * Registers observer for event. Same observer will not be added
+        * more than once for one event.
+        * @param aObserver Pointer of observer instance. Panic will occur if
+        * aObserver is NULL.
+        * @param aEvent Event, which will cause the notification of observer.
+        * @return None
+        */
+        void RegisterL( MSatEventObserver* aObserver, TInt aEvent );
+
+        /**
+        * Unregisters the notification of single event.
+        * @param aObserver Observer, whom event registeration will be
+        * unregistered.
+        * @param aEvent Event, which will be unregistered.
+        * @return None
+        */
+        void Unregister( const MSatEventObserver* aObserver, TInt aEvent );
+
+        /**
+        * Unregisters the event observer.
+        * @param aObserver Observer, whom event registeration will be
+        * unregistered.
+        */
+        void Unregister( const MSatEventObserver* aObserver );
+
+        /**
+        * Resets the list of event observers. Used instead of destructor
+        */
+        void Reset();
+
+    private:  // New functions
+
+        /**
+        * Checks if aObserver is already in the list of observers.
+        * @param aObserver Observer that is checked from the list.
+        * @return Pointer of the observer, where aObserver is registered.
+        * Contains NULL pointer if aObserver is not already registered.
+        */
+        TSatEventsObserver* HasObserverInstance(
+            const MSatEventObserver* aObserver ) const;
+
+        /**
+        * Deletes all observers marked as deleted during notify loop
+        */
+        void DeleteMarkedObservers();
+
+    private:
+
+        // Prohibit copy constructor if not deriving from CBase.
+        TSatEventMediator( const TSatEventMediator& );
+
+        // Prohibit assigment operator if not deriving from CBase.
+        TSatEventMediator& operator=( const TSatEventMediator& );
+
+    private:    // Data
+
+        // event observers.
+        RPointerArray<TSatEventsObserver> iEventsObservers;
+
+        // Indicates are we notifying observers. If this flag is on,
+        // observers cannot be removed from iEventsObservers. After
+        // notify loop is done, observers can be replaced again
+        TBool iIsNotifying;
+
+        // Indicates are there any observers marked as deleted during
+        // Notify loop
+        TBool iDeletionsMarked;
+    };
+
+#endif      // TSATEVENTMEDIATOR_H
+
+// End of File