diff -r 000000000000 -r c53acadfccc6 metadataengine/server/src/mdsobjectlocklist.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/metadataengine/server/src/mdsobjectlocklist.cpp	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,117 @@
+/*
+* 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:  Object locking features
+*
+*/
+
+#include "mdsobjectlocklist.h"
+#include "mdsnamespacedef.h"
+
+CMdSObjectLockList* CMdSObjectLockList::NewL()
+    {
+    CMdSObjectLockList* self = CMdSObjectLockList::NewLC();
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+CMdSObjectLockList* CMdSObjectLockList::NewLC()
+    {
+    CMdSObjectLockList* self = new ( ELeave ) CMdSObjectLockList();
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    return self;  
+    }
+
+void CMdSObjectLockList::ConstructL()
+    {
+    iLockListArray.Reset();
+    }
+
+CMdSObjectLockList::~CMdSObjectLockList()
+    {
+    iLockListArray.Close();
+    }
+
+void CMdSObjectLockList::LockObjectL( const CMdSServerSession& aSession, 
+		const CMdsNamespaceDef& aNamespace, const TItemId aObjectId )
+    {
+    User::LeaveIfError( iLockListArray.InsertInOrder( 
+    		TMdSLockEntry( &aSession, aNamespace, aObjectId ), 
+    		TLinearOrder<TMdSLockEntry>(TMdSLockEntry::Compare) ) );
+    }
+
+void CMdSObjectLockList::UnlockBySession( const CMdSServerSession& aSession )
+    {
+    for (TInt i = iLockListArray.Count() - 1; i >= 0; --i)
+        {
+        if ( iLockListArray[i].iSession == &aSession ) // pointer comparision
+            {
+            iLockListArray.Remove(i);
+            }
+        }
+    }
+
+void CMdSObjectLockList::UnlockById( const CMdsNamespaceDef& aNamespace, 
+		const TItemId aObjectId )
+    {
+    TInt position = Find( aNamespace, aObjectId );
+    if (position >= 0)
+    	{
+    	iLockListArray.Remove(position);
+    	}
+
+    }
+
+TBool CMdSObjectLockList::IsLocked( const CMdsNamespaceDef& aNamespace, 
+		const TItemId aObjectId ) const
+    {
+    const TInt position = Find( aNamespace, aObjectId );
+    if (position >= 0)
+    	{
+    	return ETrue;
+    	}
+    return EFalse;
+    }
+
+TInt CMdSObjectLockList::Find( const CMdsNamespaceDef& aNamespace, 
+		const TItemId aObjectId ) const
+	{
+	TInt position;
+	TInt err = iLockListArray.FindInOrder( TMdSLockEntry( 
+			(const CMdSServerSession*)NULL, aNamespace, aObjectId ),
+			position, TLinearOrder<TMdSLockEntry>(TMdSLockEntry::Compare) );
+
+	if (err != KErrNone)
+		{
+		position = -1;
+		}
+	return position;
+	}
+
+void CMdSObjectLockList::Reset()
+    {
+    iLockListArray.Reset();
+    }
+
+TInt TMdSLockEntry::Compare( const TMdSLockEntry& aFirst, const 
+		TMdSLockEntry& aSecond )
+	{
+	TInt result = aFirst.iNamespace.GetId() - aSecond.iNamespace.GetId();
+	if ( result )
+		{
+		return result;
+		}
+	return aFirst.iId - aSecond.iId;
+	}