diff -r dbfb5e38438b -r 305818acdca4 taskswitcher/server/src/tsmodelitemkey.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/taskswitcher/server/src/tsmodelitemkey.cpp	Mon Sep 13 13:26:33 2010 +0300
@@ -0,0 +1,119 @@
+/*
+* Copyright (c) 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:
+*
+*/
+#include "tsmodelitemkey.h"
+// -----------------------------------------------------------------------------
+/**
+ * @return amount of memory ( number of bytes ) required to store key.
+ */
+TInt TTsModelItemKey::Size()
+    {
+    return sizeof( TInt ) * 2;
+    }
+// -----------------------------------------------------------------------------
+/**
+ * Default constructor. Key members are initialized with 0
+ */
+TTsModelItemKey::TTsModelItemKey()
+:
+    iKey( 0 ),
+    iRoot( 0 )
+    {
+    //No implementation required
+    }
+
+// -----------------------------------------------------------------------------
+/**
+ * Constructor. Initialize members with provided values.
+ * @param aKey - key value
+ * @param aRoot - root value
+ */
+TTsModelItemKey::TTsModelItemKey( TTsKey aKey, TInt aRoot )
+:
+    iKey( aKey ),
+    iRoot( aRoot )
+    {
+    //No implementation required
+    }
+
+// -----------------------------------------------------------------------------
+/**
+ * Copy constructor
+ * @param aKey - key value that need to be duplicated
+ */
+TTsModelItemKey::TTsModelItemKey( const TTsModelItemKey& aKey )
+:
+    iKey( aKey.iKey ),
+    iRoot( aKey.iRoot )
+    {
+    //No implementation required
+    }
+
+// -----------------------------------------------------------------------------
+/**
+ * Assignment operator. Initialize members with new values
+ * @param aKey - key value that need to be duplicated
+ * @return reference to key instance
+ */
+TTsModelItemKey& TTsModelItemKey::operator =( const TTsModelItemKey& aKey )
+    {
+    iKey = aKey.iKey;
+    iRoot = aKey.iRoot;
+    return (*this);
+    }
+
+// -----------------------------------------------------------------------------
+/**
+ * Comparison operator
+ * @param aKey - compared value
+ * @return EFalse if values are not equal, other value if they match
+ */
+TBool TTsModelItemKey::operator == ( const TTsModelItemKey aKey ) const
+    {
+    return ( iKey == aKey.iKey && iRoot == aKey.iRoot );
+    }
+
+// -----------------------------------------------------------------------------
+/**
+ * Enable access to key value
+ * @return key value
+ */
+TInt TTsModelItemKey::Key() const
+    {
+    return iKey;
+    }
+
+// -----------------------------------------------------------------------------
+/**
+ * Serialize key into data stream
+ * @param aStream - destination binary stream
+ */
+void TTsModelItemKey::ExternalizeL( RWriteStream& aStream ) const
+    {
+    aStream.WriteInt32L( iKey );
+    aStream.WriteInt32L( iRoot );
+    }
+
+// -----------------------------------------------------------------------------
+/**
+ * Deserialize key from data stream
+ * @param aStream - source binary stream
+ */
+void TTsModelItemKey::InternalizeL( RReadStream& aStream )
+    {
+    iKey = aStream.ReadInt32L();
+    iRoot = aStream.ReadInt32L();
+    }