OpenSim-Test/OpenSim/Framework/Communications/XMPP/XmppSerializer.cs

/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
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 * modification, are permitted provided that the following conditions are met:
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 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
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 *       documentation and/or other materials provided with the distribution.
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 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using log4net;

namespace OpenSim.Framework.Communications.XMPP
{
    public class XmppSerializer
    {
        // private static readonly ILog _log = 
        //     LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        // need to do it this way, as XmlSerializer(type, extratypes)
        // does not work on mono (at least).
        private Dictionary<Type, XmlSerializer> _serializerForType = new Dictionary<Type, XmlSerializer>();
        private Dictionary<string, XmlSerializer> _serializerForName = new Dictionary<string, XmlSerializer>();
        private XmlSerializerNamespaces _xmlNs;
        private string _defaultNS;

        public XmppSerializer(bool server)
        {
            _xmlNs = new XmlSerializerNamespaces();
            _xmlNs.Add(String.Empty, String.Empty);
            if (server) 
                _defaultNS = "jabber:server";
            else
                _defaultNS = "jabber:client";

            // TODO: do this via reflection
            _serializerForType[typeof(XmppMessageStanza)] = _serializerForName["message"] = 
                new XmlSerializer(typeof(XmppMessageStanza), _defaultNS);
        }

        public void Serialize(XmlWriter xw, object o)
        {
            if (!_serializerForType.ContainsKey(o.GetType())) 
                throw new ArgumentException(String.Format("no serializer available for type {0}", o.GetType()));

            _serializerForType[o.GetType()].Serialize(xw, o, _xmlNs);
        }

        public object Deserialize(XmlReader xr)
        {
            // position on next element
            xr.Read();
            if (!_serializerForName.ContainsKey(xr.LocalName))
                throw new ArgumentException(String.Format("no serializer available for name {0}", xr.LocalName));

            return _serializerForName[xr.LocalName].Deserialize(xr);
        }
    }
}