//
// $Id$
//
// Narya library - tools for developing networked games
// Copyright (C) 2002-2010 Three Rings Design, Inc., All Rights Reserved
// http://www.threerings.net/code/narya/
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

package com.threerings.presents.net {

import com.threerings.io.ObjectInputStream;
import com.threerings.io.ObjectOutputStream;
import com.threerings.io.Streamable;

public /* abstract */ class DownstreamMessage
    implements Streamable
{
    /** The message id of the upstream message with which this downstream
     * message is associated (or -1 if it is not associated with any
     * upstream message). */
    public var messageId :int = -1;

    // documentation inherited from interface Streamable
    public final function writeObject (out :ObjectOutputStream) :void
    {
        throw new Error(); // abstract: not needed
    }

    // documentation inherited from interface Streamable
    public function readObject (ins :ObjectInputStream) :void
    {
        messageId = ins.readShort();
    }
}
}
