6 files changed, 573 insertions, 96 deletions

diff --git a/OpenSim/Grid/UserServer.Modules/GridInfoServiceModule.cs b/OpenSim/Data/Null/NullAuthenticationData.cs
index 0c84348..3fb3105 100644
--- a/OpenSim/Grid/UserServer.Modules/GridInfoServiceModule.cs
+++ b/OpenSim/Data/Null/NullAuthenticationData.cs
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) Contributors, http://opensimulator.org/
  * See CONTRIBUTORS.TXT for a full list of copyright holders.
  *
@@ -26,54 +26,56 @@
  */
 
 using System;
+using System.Collections;
 using System.Collections.Generic;
-using System.IO;
-using System.Reflection;
-using log4net;
-using log4net.Config;
 using OpenMetaverse;
 using OpenSim.Framework;
-using OpenSim.Framework.Communications;
-using OpenSim.Framework.Communications.Services;
-using OpenSim.Framework.Communications.Cache;
-using OpenSim.Framework.Servers;
-using OpenSim.Framework.Servers.HttpServer;
-using OpenSim.Grid.Communications.OGS1;
-using OpenSim.Grid.Framework;
+using OpenSim.Data;
 
-namespace OpenSim.Grid.UserServer.Modules
+namespace OpenSim.Data.Null
 {
-    public class GridInfoServiceModule
+    public class NullAuthenticationData : IAuthenticationData
     {
-        protected IGridServiceCore m_core;
-        protected GridInfoService m_gridInfoService;
-        protected BaseHttpServer m_httpServer;
+        private static Dictionary<UUID, AuthenticationData> m_DataByUUID = new Dictionary<UUID, AuthenticationData>();
+        private static Dictionary<UUID, string> m_Tokens = new Dictionary<UUID, string>();
 
-        public GridInfoServiceModule()
+        public NullAuthenticationData(string connectionString, string realm)
         {
         }
 
-        public void Initialise(IGridServiceCore core)
+        public AuthenticationData Get(UUID principalID)
         {
-            m_core = core;
-            m_gridInfoService = new GridInfoService();
+            if (m_DataByUUID.ContainsKey(principalID))
+                return m_DataByUUID[principalID];
+
+            return null;
         }
 
-        public void PostInitialise()
+        public bool Store(AuthenticationData data)
         {
+            m_DataByUUID[data.PrincipalID] = data;
+            return true;
+        }
 
+        public bool SetDataItem(UUID principalID, string item, string value)
+        {
+            // Not implemented
+            return false;
         }
 
-        public void RegisterHandlers(BaseHttpServer httpServer)
+        public bool SetToken(UUID principalID, string token, int lifetime)
         {
-            m_httpServer = httpServer;
-            m_httpServer.AddStreamHandler(new RestStreamHandler("GET", "/get_grid_info",
-                                                               m_gridInfoService.RestGetGridInfoMethod));
-            m_httpServer.AddXmlRPCHandler("get_grid_info", m_gridInfoService.XmlRpcGridInfoMethod);
+            m_Tokens[principalID] = token;
+            return true;
         }
 
-        public void Close()
+        public bool CheckToken(UUID principalID, string token, int lifetime)
         {
+            if (m_Tokens.ContainsKey(principalID))
+                return m_Tokens[principalID] == token;
+
+            return false;
         }
+
     }
 }
diff --git a/OpenSim/Grid/MessagingServer.Modules/PresenceBackreferenceEntry.cs b/OpenSim/Data/Null/NullAvatarData.cs
index 67dde6d..c81ba43 100644
--- a/OpenSim/Grid/MessagingServer.Modules/PresenceBackreferenceEntry.cs
+++ b/OpenSim/Data/Null/NullAvatarData.cs
@@ -25,72 +25,69 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+using System;
+using System.Collections;
 using System.Collections.Generic;
 using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Data;
 
-namespace OpenSim.Grid.MessagingServer.Modules
+namespace OpenSim.Data.Null
 {
-    // This is a wrapper for a List<UUID> so it can be happily stored in a hashtable.
-    public class PresenceBackreferenceEntry
+    public class NullAvatarData : IAvatarData
     {
-        List<UUID> AgentList = new List<UUID>();
+        private static Dictionary<UUID, AvatarBaseData> m_DataByUUID = new Dictionary<UUID, AvatarBaseData>();
 
-        public PresenceBackreferenceEntry()
+        public NullAvatarData(string connectionString, string realm)
         {
-
         }
 
-        public void Add(UUID item)
+        public AvatarBaseData[] Get(string field, string val)
         {
-            lock (AgentList)
+            if (field == "PrincipalID")
             {
-                AgentList.Add(item);
+                UUID id = UUID.Zero;
+                if (UUID.TryParse(val, out id))
+                    if (m_DataByUUID.ContainsKey(id))
+                        return new AvatarBaseData[] { m_DataByUUID[id] };
             }
-        }
 
-        public UUID getitem(int index)
-        {
-            UUID result = UUID.Zero;
-            lock (AgentList)
-            {
-                if (index > 0 && index < AgentList.Count)
-                {
-                    result = AgentList[index];
-                }
-            }
-            return result;
+            // Fail
+            return new AvatarBaseData[0];
         }
 
-        public int Count
+        public bool Store(AvatarBaseData data)
         {
-            get
-            {
-                int count = 0;
-                lock (AgentList)
-                {
-                    count = AgentList.Count;
-                }
-                return count;
-            }
+            m_DataByUUID[data.PrincipalID] = data;
+            return true;
         }
 
-        public void Remove(UUID item)
+        public bool Delete(UUID principalID, string name)
         {
-            lock (AgentList)
+            if (m_DataByUUID.ContainsKey(principalID) && m_DataByUUID[principalID].Data.ContainsKey(name))
             {
-                if (AgentList.Contains(item))
-                    AgentList.Remove(item);
+                    m_DataByUUID[principalID].Data.Remove(name);
+                    return true;
             }
+
+            return false;
         }
 
-        public bool contains(UUID item)
+        public bool Delete(string field, string val)
         {
-            bool result = false;
-            lock (AgentList)
+            if (field == "PrincipalID")
             {
-                result = AgentList.Contains(item);
+                UUID id = UUID.Zero;
+                if (UUID.TryParse(val, out id))
+                    if (m_DataByUUID.ContainsKey(id))
+                    {
+                        m_DataByUUID.Remove(id);
+                        return true;
+                    }
             }
-            return result;
+
+            return false;
         }
+
     }
 }
diff --git a/OpenSim/Grid/MessagingServer.Modules/UserDataBaseService.cs b/OpenSim/Data/Null/NullFriendsData.cs
index 76c4899..e7f7fd3 100644
--- a/OpenSim/Grid/MessagingServer.Modules/UserDataBaseService.cs
+++ b/OpenSim/Data/Null/NullFriendsData.cs
@@ -25,51 +25,68 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+using System;
+using System.Collections;
+using System.Collections.Generic;
 using OpenMetaverse;
 using OpenSim.Framework;
-using OpenSim.Framework.Communications;
+using OpenSim.Data;
 
-namespace OpenSim.Grid.MessagingServer.Modules
+namespace OpenSim.Data.Null
 {
-    public class UserDataBaseService : UserManagerBase
+    public class NullFriendsData : IFriendsData
     {
-        /// <summary>
-        /// Constructor.
-        /// </summary>
-        /// Passing null to parent because we never use any function that requires an interservice inventory call.
-        public UserDataBaseService()
-            : base(null)
+        private static List<FriendsData> m_Data = new List<FriendsData>();
+
+        public NullFriendsData(string connectionString, string realm)
         {
         }
-        
-        public UserAgentData GetUserAgentData(UUID AgentID)
-        {
-            UserProfileData userProfile = GetUserProfile(AgentID);
 
-            if (userProfile != null)
+        /// <summary>
+        /// Tries to implement the Get [] semantics, but it cuts corners.
+        /// Specifically, it gets all friendships even if they weren't accepted yet.
+        /// </summary>
+        /// <param name="fields"></param>
+        /// <param name="values"></param>
+        /// <returns></returns>
+        public FriendsData[] GetFriends(UUID userID)
+        {
+            List<FriendsData> lst = m_Data.FindAll(delegate (FriendsData fdata)
             {
-                return userProfile.CurrentAgent;
-            }
+                return fdata.PrincipalID == userID;
+            });
 
-            return null;
-        }
+            if (lst != null)
+                return lst.ToArray();
 
-        public override UserProfileData SetupMasterUser(string firstName, string lastName)
-        {
-            //throw new Exception("The method or operation is not implemented.");
-            return null;
+            return new FriendsData[0];
         }
 
-        public override UserProfileData SetupMasterUser(string firstName, string lastName, string password)
+        public bool Store(FriendsData data)
         {
-            //throw new Exception("The method or operation is not implemented.");
-            return null;
+            if (data == null)
+                return false;
+
+            m_Data.Add(data);
+
+            return true;
         }
 
-        public override UserProfileData SetupMasterUser(UUID uuid)
+        public bool Delete(UUID userID, string friendID)
         {
-            //throw new Exception("The method or operation is not implemented.");
-            return null;
+            List<FriendsData> lst = m_Data.FindAll(delegate(FriendsData fdata) { return fdata.PrincipalID == userID; });
+            if (lst != null)
+            {
+                FriendsData friend = lst.Find(delegate(FriendsData fdata) { return fdata.Friend == friendID; });
+                if (friendID != null)
+                {
+                    m_Data.Remove(friend);
+                    return true;
+                }
+            }
+
+            return false;
         }
+
     }
 }
diff --git a/OpenSim/Data/Null/NullPresenceData.cs b/OpenSim/Data/Null/NullPresenceData.cs
new file mode 100644
index 0000000..5f78691
--- /dev/null
+++ b/OpenSim/Data/Null/NullPresenceData.cs
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Data;
+
+namespace OpenSim.Data.Null
+{
+    public class NullPresenceData : IPresenceData
+    {
+        private static NullPresenceData Instance;
+
+        Dictionary<UUID, PresenceData> m_presenceData = new Dictionary<UUID, PresenceData>();
+
+        public NullPresenceData(string connectionString, string realm)
+        {
+            if (Instance == null)
+            {
+                Instance = this;
+
+                //Console.WriteLine("[XXX] NullRegionData constructor");
+                // Let's stick in a test presence
+                PresenceData p = new PresenceData();
+                p.SessionID = UUID.Zero;
+                p.UserID = UUID.Zero.ToString();
+                p.Data = new Dictionary<string, string>();
+                p.Data["Online"] = true.ToString();
+                m_presenceData.Add(UUID.Zero, p);
+            }
+        }
+
+        public bool Store(PresenceData data)
+        {
+            if (Instance != this)
+                return Instance.Store(data);
+
+            m_presenceData[data.SessionID] = data;
+            return true;
+        }
+
+        public PresenceData Get(UUID sessionID)
+        {
+            if (Instance != this)
+                return Instance.Get(sessionID);
+
+            if (m_presenceData.ContainsKey(sessionID))
+            {
+                return m_presenceData[sessionID];
+            }
+
+            return null;
+        }
+
+        public void LogoutRegionAgents(UUID regionID)
+        {
+            if (Instance != this)
+            {
+                Instance.LogoutRegionAgents(regionID);
+                return;
+            }
+
+            List<UUID> toBeDeleted = new List<UUID>();
+            foreach (KeyValuePair<UUID, PresenceData> kvp in m_presenceData)
+                if (kvp.Value.RegionID == regionID)
+                    toBeDeleted.Add(kvp.Key);
+
+            foreach (UUID u in toBeDeleted)
+                m_presenceData.Remove(u);
+        }
+
+        public bool ReportAgent(UUID sessionID, UUID regionID, string position, string lookAt)
+        {
+            if (Instance != this)
+                return Instance.ReportAgent(sessionID, regionID, position, lookAt);
+            if (m_presenceData.ContainsKey(sessionID))
+            {
+                m_presenceData[sessionID].RegionID = regionID;
+                m_presenceData[sessionID].Data["Position"] = position;
+                m_presenceData[sessionID].Data["LookAt"] = lookAt;
+                return true;
+            }
+
+            return false;
+        }
+
+        public bool SetHomeLocation(string userID, UUID regionID, Vector3 position, Vector3 lookAt)
+        {
+            if (Instance != this)
+                return Instance.SetHomeLocation(userID, regionID, position, lookAt);
+
+            bool foundone = false;
+            foreach (PresenceData p in m_presenceData.Values)
+            {
+                if (p.UserID == userID)
+                {
+                    p.Data["HomeRegionID"] = regionID.ToString();
+                    p.Data["HomePosition"] = position.ToString();
+                    p.Data["HomeLookAt"] = lookAt.ToString();
+                    foundone = true;
+                }
+            }
+
+            return foundone;
+        }
+
+        public PresenceData[] Get(string field, string data)
+        {
+            if (Instance != this)
+                return Instance.Get(field, data);
+
+            List<PresenceData> presences = new List<PresenceData>();
+            if (field == "UserID")
+            {
+                foreach (PresenceData p in m_presenceData.Values)
+                    if (p.UserID == data)
+                        presences.Add(p);
+                return presences.ToArray();
+            }
+            else if (field == "SessionID")
+            {
+                UUID session = UUID.Zero;
+                if (!UUID.TryParse(data, out session))
+                    return presences.ToArray();
+
+                if (m_presenceData.ContainsKey(session))
+                {
+                    presences.Add(m_presenceData[session]);
+                    return presences.ToArray();
+                }
+            }
+            else if (field == "RegionID")
+            {
+                UUID region = UUID.Zero;
+                if (!UUID.TryParse(data, out region))
+                    return presences.ToArray();
+                foreach (PresenceData p in m_presenceData.Values)
+                    if (p.RegionID == region)
+                        presences.Add(p);
+                return presences.ToArray();
+            }
+            else
+            {
+                foreach (PresenceData p in m_presenceData.Values)
+                {
+                    if (p.Data.ContainsKey(field) && p.Data[field] == data)
+                        presences.Add(p);
+                }
+                return presences.ToArray();
+            }
+
+            return presences.ToArray();
+        }
+
+        public void Prune(string userID)
+        {
+            if (Instance != this)
+            {
+                Instance.Prune(userID);
+                return;
+            }
+
+            List<UUID> deleteSessions = new List<UUID>();
+            int online = 0;
+
+            foreach (KeyValuePair<UUID, PresenceData> kvp in m_presenceData)
+            {
+                bool on = false;
+                if (bool.TryParse(kvp.Value.Data["Online"], out on) && on)
+                    online++;
+                else
+                    deleteSessions.Add(kvp.Key);
+            }
+            if (online == 0 && deleteSessions.Count > 0)
+                deleteSessions.RemoveAt(0);
+
+            foreach (UUID s in deleteSessions)
+                m_presenceData.Remove(s);
+
+        }
+
+        public bool Delete(string field, string data)
+        {
+            if (Instance != this)
+                return Delete(field, data);
+
+            List<UUID> presences = new List<UUID>();
+            if (field == "UserID")
+            {
+                foreach (KeyValuePair<UUID, PresenceData> p in m_presenceData)
+                    if (p.Value.UserID == data)
+                        presences.Add(p.Key);
+            }
+            else if (field == "SessionID")
+            {
+                UUID session = UUID.Zero;
+                if (UUID.TryParse(data, out session))
+                {
+                    if (m_presenceData.ContainsKey(session))
+                    {
+                        presences.Add(session);
+                    }
+                }
+            }
+            else if (field == "RegionID")
+            {
+                UUID region = UUID.Zero;
+                if (UUID.TryParse(data, out region))
+                {
+                    foreach (KeyValuePair<UUID, PresenceData> p in m_presenceData)
+                        if (p.Value.RegionID == region)
+                            presences.Add(p.Key);
+                }
+            }
+            else
+            {
+                foreach (KeyValuePair<UUID, PresenceData> p in m_presenceData)
+                {
+                    if (p.Value.Data.ContainsKey(field) && p.Value.Data[field] == data)
+                        presences.Add(p.Key);
+                }
+            }
+
+            foreach (UUID u in presences)
+                m_presenceData.Remove(u);
+
+            if (presences.Count == 0)
+                return false;
+
+            return true;
+        }
+
+    }
+}
diff --git a/OpenSim/Data/Null/NullRegionData.cs b/OpenSim/Data/Null/NullRegionData.cs
index e8263ea..5b9898c 100644
--- a/OpenSim/Data/Null/NullRegionData.cs
+++ b/OpenSim/Data/Null/NullRegionData.cs
@@ -31,20 +31,31 @@ using System.Collections.Generic;
 using OpenMetaverse;
 using OpenSim.Framework;
 using OpenSim.Data;
+using System.Reflection;
+using log4net;
 
 namespace OpenSim.Data.Null
 {
     public class NullRegionData : IRegionData
     {
+        private static NullRegionData Instance = null;
+
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
         Dictionary<UUID, RegionData> m_regionData = new Dictionary<UUID, RegionData>();
 
         public NullRegionData(string connectionString, string realm)
         {
+            if (Instance == null)
+                Instance = this;
             //Console.WriteLine("[XXX] NullRegionData constructor");
         }
 
         public List<RegionData> Get(string regionName, UUID scopeID)
         {
+            if (Instance != this)
+                return Instance.Get(regionName, scopeID);
+
             List<RegionData> ret = new List<RegionData>();
 
             foreach (RegionData r in m_regionData.Values)
@@ -69,6 +80,9 @@ namespace OpenSim.Data.Null
 
         public RegionData Get(int posX, int posY, UUID scopeID)
         {
+            if (Instance != this)
+                return Instance.Get(posX, posY, scopeID);
+
             List<RegionData> ret = new List<RegionData>();
 
             foreach (RegionData r in m_regionData.Values)
@@ -85,6 +99,9 @@ namespace OpenSim.Data.Null
 
         public RegionData Get(UUID regionID, UUID scopeID)
         {
+            if (Instance != this)
+                return Instance.Get(regionID, scopeID);
+
             if (m_regionData.ContainsKey(regionID))
                 return m_regionData[regionID];
 
@@ -93,6 +110,9 @@ namespace OpenSim.Data.Null
 
         public List<RegionData> Get(int startX, int startY, int endX, int endY, UUID scopeID)
         {
+            if (Instance != this)
+                return Instance.Get(startX, startY, endX, endY, scopeID);
+
             List<RegionData> ret = new List<RegionData>();
 
             foreach (RegionData r in m_regionData.Values)
@@ -106,6 +126,9 @@ namespace OpenSim.Data.Null
 
         public bool Store(RegionData data)
         {
+            if (Instance != this)
+                return Instance.Store(data);
+
             m_regionData[data.RegionID] = data;
 
             return true;
@@ -113,6 +136,9 @@ namespace OpenSim.Data.Null
 
         public bool SetDataItem(UUID regionID, string item, string value)
         {
+            if (Instance != this)
+                return Instance.SetDataItem(regionID, item, value);
+
             if (!m_regionData.ContainsKey(regionID))
                 return false;
 
@@ -123,6 +149,9 @@ namespace OpenSim.Data.Null
 
         public bool Delete(UUID regionID)
         {
+            if (Instance != this)
+                return Instance.Delete(regionID);
+
             if (!m_regionData.ContainsKey(regionID))
                 return false;
 
@@ -130,5 +159,37 @@ namespace OpenSim.Data.Null
 
             return true;
         }
+
+        public List<RegionData> GetDefaultRegions(UUID scopeID)
+        {
+            if (Instance != this)
+                return Instance.GetDefaultRegions(scopeID);
+
+            List<RegionData> ret = new List<RegionData>();
+
+            foreach (RegionData r in m_regionData.Values)
+            {
+                if ((Convert.ToInt32(r.Data["flags"]) & 1) != 0)
+                    ret.Add(r);
+            }
+
+            return ret;
+        }
+
+        public List<RegionData> GetFallbackRegions(UUID scopeID, int x, int y)
+        {
+            if (Instance != this)
+                return Instance.GetFallbackRegions(scopeID, x, y);
+
+            List<RegionData> ret = new List<RegionData>();
+
+            foreach (RegionData r in m_regionData.Values)
+            {
+                if ((Convert.ToInt32(r.Data["flags"]) & 2) != 0)
+                    ret.Add(r);
+            }
+
+            return ret;
+        }
     }
 }
diff --git a/OpenSim/Data/Null/NullUserAccountData.cs b/OpenSim/Data/Null/NullUserAccountData.cs
new file mode 100644
index 0000000..fc2c5d5
--- /dev/null
+++ b/OpenSim/Data/Null/NullUserAccountData.cs
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Data;
+
+namespace OpenSim.Data.Null
+{
+    public class NullUserAccountData : IUserAccountData
+    {
+        private static Dictionary<UUID, UserAccountData> m_DataByUUID = new Dictionary<UUID, UserAccountData>();
+        private static Dictionary<string, UserAccountData> m_DataByName = new Dictionary<string, UserAccountData>();
+        private static Dictionary<string, UserAccountData> m_DataByEmail = new Dictionary<string, UserAccountData>();
+
+        public NullUserAccountData(string connectionString, string realm)
+        {
+        }
+
+        /// <summary>
+        /// Tries to implement the Get [] semantics, but it cuts corners like crazy.
+        /// Specifically, it relies on the knowledge that the only Gets used are
+        /// keyed on PrincipalID, Email, and FirstName+LastName.
+        /// </summary>
+        /// <param name="fields"></param>
+        /// <param name="values"></param>
+        /// <returns></returns>
+        public UserAccountData[] Get(string[] fields, string[] values)
+        {
+            List<string> fieldsLst = new List<string>(fields);
+            if (fieldsLst.Contains("PrincipalID"))
+            {
+                int i = fieldsLst.IndexOf("PrincipalID");
+                UUID id = UUID.Zero;
+                if (UUID.TryParse(values[i], out id))
+                    if (m_DataByUUID.ContainsKey(id))
+                        return new UserAccountData[] { m_DataByUUID[id] };
+            }
+            if (fieldsLst.Contains("FirstName") && fieldsLst.Contains("LastName"))
+            {
+                int findex = fieldsLst.IndexOf("FirstName");
+                int lindex = fieldsLst.IndexOf("LastName");
+                if (m_DataByName.ContainsKey(values[findex] + " " + values[lindex]))
+                    return new UserAccountData[] { m_DataByName[values[findex] + " " + values[lindex]] };
+            }
+            if (fieldsLst.Contains("Email"))
+            {
+                int i = fieldsLst.IndexOf("Email");
+                if (m_DataByEmail.ContainsKey(values[i]))
+                    return new UserAccountData[] { m_DataByEmail[values[i]] };
+            }
+
+            // Fail
+            return new UserAccountData[0];
+        }
+
+        public bool Store(UserAccountData data)
+        {
+            if (data == null)
+                return false;
+
+            m_DataByUUID[data.PrincipalID] = data;
+            m_DataByName[data.FirstName + " " + data.LastName] = data;
+            if (data.Data.ContainsKey("Email") && data.Data["Email"] != string.Empty)
+                m_DataByEmail[data.Data["Email"]] = data;
+
+            return true;
+        }
+
+        public UserAccountData[] GetUsers(UUID scopeID, string query)
+        {
+            string[] words = query.Split(new char[] { ' ' });
+
+            for (int i = 0; i < words.Length; i++)
+            {
+                if (words[i].Length < 3)
+                {
+                    if (i != words.Length - 1)
+                        Array.Copy(words, i + 1, words, i, words.Length - i - 1);
+                    Array.Resize(ref words, words.Length - 1);
+                }
+            }
+
+            if (words.Length == 0)
+                return new UserAccountData[0];
+
+            if (words.Length > 2)
+                return new UserAccountData[0];
+
+            List<string> lst = new List<string>(m_DataByName.Keys);
+            if (words.Length == 1)
+            {
+                lst = lst.FindAll(delegate(string s) { return s.StartsWith(words[0]); });
+            }
+            else
+            {
+                lst = lst.FindAll(delegate(string s) { return s.Contains(words[0]) || s.Contains(words[1]); });
+            }
+
+            if (lst == null || (lst != null && lst.Count == 0))
+                return new UserAccountData[0];
+
+            UserAccountData[] result = new UserAccountData[lst.Count];
+            int n = 0;
+            foreach (string key in lst)
+                result[n++] = m_DataByName[key];
+
+            return result;
+        }
+
+    }
+}