Fix issue where loading OARs could sometimes result in link numbers being reordered.

This was because the parts in scene objects were sometimes not serialized in link order.
This is perfectly fine since the parts still have the right link numbers, but an extra fix to adjust for this
had not been done in the SerialiserModule methods that OAR loading used.
Add regression test for same.
Addresses http://opensimulator.org/mantis/view.php?id=5948, http://opensimulator.org/mantis/view.php?id=5749

3 files changed, 68 insertions, 2 deletions

diff --git a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
index bf0ff75..11eca12 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
@@ -41,6 +41,7 @@ using OpenSim.Framework.Serialization.External;
 using OpenSim.Region.CoreModules.World.Terrain;
 using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
+using OpenSim.Region.Framework.Scenes.Serialization;
 using OpenSim.Services.Interfaces;
 
 namespace OpenSim.Region.CoreModules.World.Archiver
@@ -266,7 +267,8 @@ namespace OpenSim.Region.CoreModules.World.Archiver
                 }
                 */
 
-                SceneObjectGroup sceneObject = serialiser.DeserializeGroupFromXml2(serialisedSceneObject);
+                SceneObjectGroup sceneObject = SceneObjectSerializer.FromXml2Format(serialisedSceneObject);
+//                SceneObjectGroup sceneObject = serialiser.DeserializeGroupFromXml2(serialisedSceneObject);
 
                 bool isTelehub = (sceneObject.UUID == oldTelehubUUID);
 
diff --git a/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs b/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
index 394ca27..5deaf52 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
@@ -292,6 +292,59 @@ namespace OpenSim.Region.CoreModules.World.Archiver.Tests
         }
 
         /// <summary>
+        /// Test loading an OpenSim Region Archive where the scene object parts are not ordered by link number (e.g.
+        /// 2 can come after 3).
+        /// </summary>
+        [Test]
+        public void TestLoadOarUnorderedParts()
+        {
+            TestHelpers.InMethod();
+
+            UUID ownerId = TestHelpers.ParseTail(0xaaaa);
+
+            MemoryStream archiveWriteStream = new MemoryStream();
+            TarArchiveWriter tar = new TarArchiveWriter(archiveWriteStream);
+
+            tar.WriteFile(
+                ArchiveConstants.CONTROL_FILE_PATH,
+                new ArchiveWriteRequestPreparation(null, (Stream)null, Guid.Empty).CreateControlFile(new Dictionary<string, Object>()));
+
+            SceneObjectGroup sog1 = SceneHelpers.CreateSceneObject(1, ownerId, "obj1-", 0x11);
+            SceneObjectPart sop2
+                = SceneHelpers.CreateSceneObjectPart("obj1-Part2", TestHelpers.ParseTail(0x12), ownerId);
+            SceneObjectPart sop3
+                = SceneHelpers.CreateSceneObjectPart("obj1-Part3", TestHelpers.ParseTail(0x13), ownerId);
+
+            // Add the parts so they will be written out in reverse order to the oar
+            sog1.AddPart(sop3);
+            sop3.LinkNum = 3;
+            sog1.AddPart(sop2);
+            sop2.LinkNum = 2;
+
+            tar.WriteFile(
+                ArchiveConstants.CreateOarObjectPath(sog1.Name, sog1.UUID, sog1.AbsolutePosition),
+                SceneObjectSerializer.ToXml2Format(sog1));
+
+            tar.Close();
+
+            MemoryStream archiveReadStream = new MemoryStream(archiveWriteStream.ToArray());
+
+            lock (this)
+            {
+                m_scene.EventManager.OnOarFileLoaded += LoadCompleted;
+                m_archiverModule.DearchiveRegion(archiveReadStream);
+            }
+
+            Assert.That(m_lastErrorMessage, Is.Null);
+
+            SceneObjectPart part2 = m_scene.GetSceneObjectPart("obj1-Part2");
+            Assert.That(part2.LinkNum, Is.EqualTo(2));
+
+            SceneObjectPart part3 = m_scene.GetSceneObjectPart("obj1-Part3");
+            Assert.That(part3.LinkNum, Is.EqualTo(3));
+        }
+
+        /// <summary>
         /// Test loading an OpenSim Region Archive.
         /// </summary>
         [Test]
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index f911ef8..1a940aa 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -932,7 +932,18 @@ namespace OpenSim.Region.Framework.Scenes
         public int LinkNum
         {
             get { return m_linkNum; }
-            set { m_linkNum = value; }
+            set
+            {
+//                if (ParentGroup != null)
+//                {
+//                    m_log.DebugFormat(
+//                        "[SCENE OBJECT PART]: Setting linknum of {0}@{1} to {2} from {3}",
+//                        Name, AbsolutePosition, value, m_linkNum);
+//                    Util.PrintCallStack();
+//                }
+
+                m_linkNum = value;
+            }
         }
 
         public byte ClickAction