Change LandDataSerializer deserialization so that in the future it won't care about extra elements or element order.

This brings it into line with other deserializations such as object and will improve future backward compatibility.

1 files changed, 177 insertions, 60 deletions

diff --git a/OpenSim/Framework/Serialization/External/LandDataSerializer.cs b/OpenSim/Framework/Serialization/External/LandDataSerializer.cs
index 3ae9a8e..bf6c4e5 100644
--- a/OpenSim/Framework/Serialization/External/LandDataSerializer.cs
+++ b/OpenSim/Framework/Serialization/External/LandDataSerializer.cs
@@ -28,8 +28,10 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Reflection;
 using System.Text;
 using System.Xml;
+using log4net;
 using OpenMetaverse;
 using OpenSim.Framework;
 
@@ -40,8 +42,152 @@ namespace OpenSim.Framework.Serialization.External
     /// </summary>
     public class LandDataSerializer
     {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
         protected static UTF8Encoding m_utf8Encoding = new UTF8Encoding();
 
+        private delegate void LandDataProcessor(LandData landData, XmlTextReader reader);
+        private static Dictionary<string, LandDataProcessor> m_ldProcessors
+            = new Dictionary<string, LandDataProcessor>();
+
+        private delegate void LandAccessEntryProcessor(LandAccessEntry lae, XmlTextReader reader);
+        private static Dictionary<string, LandAccessEntryProcessor> m_laeProcessors
+            = new Dictionary<string, LandAccessEntryProcessor>();
+
+        static LandDataSerializer()
+        {
+            // LandData processors
+            m_ldProcessors.Add(
+                "Area",             (ld, xtr) => ld.Area = Convert.ToInt32(xtr.ReadElementString("Area")));
+            m_ldProcessors.Add(
+                "AuctionID",        (ld, xtr) => ld.AuctionID = Convert.ToUInt32(xtr.ReadElementString("AuctionID")));
+            m_ldProcessors.Add(
+                "AuthBuyerID",      (ld, xtr) => ld.AuthBuyerID = UUID.Parse(xtr.ReadElementString("AuthBuyerID")));
+            m_ldProcessors.Add(
+                "Category",         (ld, xtr) => ld.Category = (ParcelCategory)Convert.ToSByte(xtr.ReadElementString("Category")));
+            m_ldProcessors.Add(
+                "ClaimDate",        (ld, xtr) => ld.ClaimDate = Convert.ToInt32(xtr.ReadElementString("ClaimDate")));
+            m_ldProcessors.Add(
+                "ClaimPrice",       (ld, xtr) => ld.ClaimPrice = Convert.ToInt32(xtr.ReadElementString("ClaimPrice")));
+            m_ldProcessors.Add(
+                "GlobalID",         (ld, xtr) => ld.GlobalID = UUID.Parse(xtr.ReadElementString("GlobalID")));
+            m_ldProcessors.Add(
+                "GroupID",          (ld, xtr) => ld.GroupID = UUID.Parse(xtr.ReadElementString("GroupID")));
+            m_ldProcessors.Add(
+                "IsGroupOwned",     (ld, xtr) => ld.IsGroupOwned = Convert.ToBoolean(xtr.ReadElementString("IsGroupOwned")));
+            m_ldProcessors.Add(
+                "Bitmap",           (ld, xtr) => ld.Bitmap = Convert.FromBase64String(xtr.ReadElementString("Bitmap")));
+            m_ldProcessors.Add(
+                "Description",      (ld, xtr) => ld.Description = xtr.ReadElementString("Description"));
+            m_ldProcessors.Add(
+                "Flags",            (ld, xtr) => ld.Flags = Convert.ToUInt32(xtr.ReadElementString("Flags")));
+            m_ldProcessors.Add(
+                "LandingType",      (ld, xtr) => ld.LandingType = Convert.ToByte(xtr.ReadElementString("LandingType")));
+            m_ldProcessors.Add(
+                "Name",             (ld, xtr) => ld.Name = xtr.ReadElementString("Name"));
+            m_ldProcessors.Add(
+                "Status",           (ld, xtr) => ld.Status = (ParcelStatus)Convert.ToSByte(xtr.ReadElementString("Status")));
+            m_ldProcessors.Add(
+                "LocalID",          (ld, xtr) => ld.LocalID = Convert.ToInt32(xtr.ReadElementString("LocalID")));
+            m_ldProcessors.Add(
+                "MediaAutoScale",   (ld, xtr) => ld.MediaAutoScale = Convert.ToByte(xtr.ReadElementString("MediaAutoScale")));
+            m_ldProcessors.Add(
+                "MediaID",          (ld, xtr) => ld.MediaID = UUID.Parse(xtr.ReadElementString("MediaID")));
+            m_ldProcessors.Add(
+                "MediaURL",         (ld, xtr) => ld.MediaURL = xtr.ReadElementString("MediaURL"));
+            m_ldProcessors.Add(
+                "MusicURL",         (ld, xtr) => ld.MusicURL = xtr.ReadElementString("MusicURL"));
+
+            m_ldProcessors.Add(
+                "ParcelAccessList", ProcessParcelAccessList);
+
+            m_ldProcessors.Add(
+                "PassHours",        (ld, xtr) => ld.PassHours = Convert.ToSingle(xtr.ReadElementString("PassHours")));
+            m_ldProcessors.Add(
+                "PassPrice",        (ld, xtr) => ld.PassPrice = Convert.ToInt32(xtr.ReadElementString("PassPrice")));
+            m_ldProcessors.Add(
+                "SalePrice",        (ld, xtr) => ld.SalePrice = Convert.ToInt32(xtr.ReadElementString("SalePrice")));
+            m_ldProcessors.Add(
+                "SnapshotID",       (ld, xtr) => ld.SnapshotID = UUID.Parse(xtr.ReadElementString("SnapshotID")));
+            m_ldProcessors.Add(
+                "UserLocation",     (ld, xtr) => ld.UserLocation = Vector3.Parse(xtr.ReadElementString("UserLocation")));
+            m_ldProcessors.Add(
+                "UserLookAt",       (ld, xtr) => ld.UserLookAt = Vector3.Parse(xtr.ReadElementString("UserLookAt")));
+
+            // No longer used here                                                                                                                  //
+            // m_ldProcessors.Add("Dwell",    (landData, xtr) => return);
+
+            m_ldProcessors.Add(
+                "OtherCleanTime",   (ld, xtr) => ld.OtherCleanTime = Convert.ToInt32(xtr.ReadElementString("OtherCleanTime")));
+
+            // LandAccessEntryProcessors
+            m_laeProcessors.Add(
+                "AgentID",          (lae, xtr) => lae.AgentID = UUID.Parse(xtr.ReadElementString("AgentID")));
+            m_laeProcessors.Add(
+                "Time",             (lae, xtr) =>
+                {
+                    // We really don't care about temp vs perm here and this
+                    // would break on old oars. Assume all bans are perm
+                    xtr.ReadElementString("Time");
+                    lae.Expires = 0; // Convert.ToUint(                       xtr.ReadElementString("Time"));
+                }
+            );
+            m_laeProcessors.Add(
+                "AccessList",       (lae, xtr) => lae.Flags = (AccessList)Convert.ToUInt32(xtr.ReadElementString("AccessList")));
+        }
+
+        public static void ProcessParcelAccessList(LandData ld, XmlTextReader xtr)
+        {
+            if (!xtr.IsEmptyElement)
+            {
+                while (xtr.Read() && xtr.NodeType != XmlNodeType.EndElement)
+                {
+                    LandAccessEntry lae = new LandAccessEntry();
+
+                    xtr.ReadStartElement("ParcelAccessEntry");
+
+                    string nodeName = string.Empty;
+                    while (xtr.NodeType != XmlNodeType.EndElement)
+                    {
+                        nodeName = xtr.Name;
+    
+//                        m_log.DebugFormat("[LandDataSerializer]: Processing: {0} in ParcelAccessEntry", nodeName);
+
+                        LandAccessEntryProcessor p = null;
+                        if (m_laeProcessors.TryGetValue(xtr.Name, out p))
+                        {
+//                            m_log.DebugFormat("[LandDataSerializer]: Found {0} processor in ParcelAccessEntry", nodeName);
+
+                            try
+                            {
+                                p(lae, xtr);
+                            }
+                            catch (Exception e)
+                            {
+                                m_log.ErrorFormat(
+                                    "[LandDataSerializer]: Exception while parsing element {0} in ParcelAccessEntry, continuing.  Exception {1}{2}",
+                                    nodeName, e.Message, e.StackTrace);
+    
+                                if (xtr.NodeType == XmlNodeType.EndElement)
+                                    xtr.Read();
+                            }
+                        }
+                        else
+                        {
+                            // m_log.DebugFormat("[LandDataSerializer]: caught unknown element {0}", nodeName);
+                            xtr.ReadOuterXml(); // ignore
+                        }
+                    }
+
+                    xtr.ReadEndElement();
+
+                    ld.ParcelAccessList.Add(lae);
+                }
+            }
+
+            xtr.Read();
+        }
+
         /// <summary>
         /// Reify/deserialize landData
         /// </summary>
@@ -63,72 +209,43 @@ namespace OpenSim.Framework.Serialization.External
         {
             LandData landData = new LandData();
 
-            StringReader sr = new StringReader(serializedLandData);
-            XmlTextReader xtr = new XmlTextReader(sr);
-
-            xtr.ReadStartElement("LandData");
-
-            landData.Area           = Convert.ToInt32(                 xtr.ReadElementString("Area"));
-            landData.AuctionID      = Convert.ToUInt32(                xtr.ReadElementString("AuctionID"));
-            landData.AuthBuyerID    = UUID.Parse(                      xtr.ReadElementString("AuthBuyerID"));
-            landData.Category       = (ParcelCategory)Convert.ToSByte( xtr.ReadElementString("Category"));
-            landData.ClaimDate      = Convert.ToInt32(                 xtr.ReadElementString("ClaimDate"));
-            landData.ClaimPrice     = Convert.ToInt32(                 xtr.ReadElementString("ClaimPrice"));
-            landData.GlobalID       = UUID.Parse(                      xtr.ReadElementString("GlobalID"));
-            landData.GroupID        = UUID.Parse(                      xtr.ReadElementString("GroupID"));
-            landData.IsGroupOwned   = Convert.ToBoolean(               xtr.ReadElementString("IsGroupOwned"));
-            landData.Bitmap         = Convert.FromBase64String(        xtr.ReadElementString("Bitmap"));
-            landData.Description    =                                  xtr.ReadElementString("Description");
-            landData.Flags          = Convert.ToUInt32(                xtr.ReadElementString("Flags"));
-            landData.LandingType    = Convert.ToByte(                  xtr.ReadElementString("LandingType"));
-            landData.Name           =                                  xtr.ReadElementString("Name");
-            landData.Status         = (ParcelStatus)Convert.ToSByte(   xtr.ReadElementString("Status"));
-            landData.LocalID        = Convert.ToInt32(                 xtr.ReadElementString("LocalID"));
-            landData.MediaAutoScale = Convert.ToByte(                  xtr.ReadElementString("MediaAutoScale"));
-            landData.MediaID        = UUID.Parse(                      xtr.ReadElementString("MediaID"));
-            landData.MediaURL       =                                  xtr.ReadElementString("MediaURL");
-            landData.MusicURL       =                                  xtr.ReadElementString("MusicURL");
-            landData.OwnerID        = UUID.Parse(                      xtr.ReadElementString("OwnerID"));
-
-            landData.ParcelAccessList = new List<LandAccessEntry>();
-            xtr.Read();
-            if (xtr.Name != "ParcelAccessList")
-                throw new XmlException(String.Format("Expected \"ParcelAccessList\" element but got \"{0}\"", xtr.Name));
-
-            if (!xtr.IsEmptyElement)
+            using (XmlTextReader reader = new XmlTextReader(new StringReader(serializedLandData)))
             {
-                while (xtr.Read() && xtr.NodeType != XmlNodeType.EndElement)
-                {
-                    LandAccessEntry pae = new LandAccessEntry();
+                reader.ReadStartElement("LandData");
 
-                    xtr.ReadStartElement("ParcelAccessEntry");
-                    pae.AgentID    = UUID.Parse(                           xtr.ReadElementString("AgentID"));
-                    // We really don't care about temp vs perm here and this
-                    // would break on old oars. Assume all bans are perm
-                    xtr.ReadElementString("Time");
-                    pae.Expires    = 0; // Convert.ToUint(                       xtr.ReadElementString("Time"));
-                    pae.Flags      = (AccessList)Convert.ToUInt32(         xtr.ReadElementString("AccessList"));
-                    xtr.ReadEndElement();
+                string nodeName = string.Empty;
+                while (reader.NodeType != XmlNodeType.EndElement)
+                {
+                    nodeName = reader.Name;
 
-                    landData.ParcelAccessList.Add(pae);
-                }
-            }
-            xtr.Read();
+//                    m_log.DebugFormat("[LandDataSerializer]: Processing: {0}", nodeName);
 
-            landData.PassHours      = Convert.ToSingle(                    xtr.ReadElementString("PassHours"));
-            landData.PassPrice      = Convert.ToInt32(                     xtr.ReadElementString("PassPrice"));
-            landData.SalePrice      = Convert.ToInt32(                     xtr.ReadElementString("SalePrice"));
-            landData.SnapshotID     = UUID.Parse(                          xtr.ReadElementString("SnapshotID"));
-            landData.UserLocation   = Vector3.Parse(                       xtr.ReadElementString("UserLocation"));
-            landData.UserLookAt     = Vector3.Parse(                       xtr.ReadElementString("UserLookAt"));
-            // No longer used here
-            xtr.ReadElementString("Dwell");
-            landData.OtherCleanTime = Convert.ToInt32(                     xtr.ReadElementString("OtherCleanTime"));
+                    LandDataProcessor p = null;
+                    if (m_ldProcessors.TryGetValue(reader.Name, out p))
+                    {
+                        try
+                        {
+                            p(landData, reader);
+                        }
+                        catch (Exception e)
+                        {
+                            m_log.ErrorFormat(
+                                "[LandDataSerializer]: exception while parsing element {0}, continuing.  Exception {1}{2}",
+                                nodeName, e.Message, e.StackTrace);
 
-            xtr.ReadEndElement();
+                            if (reader.NodeType == XmlNodeType.EndElement)
+                                reader.Read();
+                        }
+                    }
+                    else
+                    {
+                        // m_log.DebugFormat("[LandDataSerializer]: caught unknown element {0}", nodeName);
+                        reader.ReadOuterXml(); // ignore
+                    }
+                }
 
-            xtr.Close();
-            sr.Close();
+                reader.ReadEndElement();
+            }
 
             return landData;
         }