/* This file is part of the db4o object database http://www.db4o.com

Copyright (C) 2004 - 2010  Versant Corporation http://www.versant.com

db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program.  If not, see http://www.gnu.org/licenses/. */
using Db4objects.Db4o.CS.Internal.Messages;
using Db4objects.Db4o.Internal;

namespace Db4objects.Db4o.CS.Internal.Messages
{
	public sealed class MReadObject : MsgD, IMessageWithResponse
	{
		public Msg ReplyFromServer()
		{
			StatefulBuffer bytes = null;
			// readWriterByID may fail in certain cases, for instance if
			// and object was deleted by another client
			int id = _payLoad.ReadInt();
			int lastCommitted = _payLoad.ReadInt();
			lock (ContainerLock())
			{
				bytes = Container().ReadStatefulBufferById(Transaction(), id, lastCommitted == 1);
			}
			if (bytes == null)
			{
				bytes = new StatefulBuffer(Transaction(), 0, 0);
			}
			return Msg.ObjectToClient.GetWriter(bytes);
		}
	}
}
