Duplicate OpenSim.Data.SQLite into OpenSim.Data.SQLiteNG. SQLiteNG will shortly be changed to work under mono 2.6 and above

1 files changed, 898 insertions, 0 deletions

diff --git a/OpenSim/Data/SQLiteNG/SQLiteInventoryStore.cs b/OpenSim/Data/SQLiteNG/SQLiteInventoryStore.cs
new file mode 100644
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+/*
+ * 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.Generic;
+using System.Data;
+using System.Reflection;
+using log4net;
+using Mono.Data.SqliteClient;
+using OpenMetaverse;
+using OpenSim.Framework;
+
+namespace OpenSim.Data.SQLite
+{
+    /// <summary>
+    /// An Inventory Interface to the SQLite database
+    /// </summary>
+    public class SQLiteInventoryStore : SQLiteUtil, IInventoryDataPlugin
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        private const string invItemsSelect = "select * from inventoryitems";
+        private const string invFoldersSelect = "select * from inventoryfolders";
+
+        private static SqliteConnection conn;
+        private static DataSet ds;
+        private static SqliteDataAdapter invItemsDa;
+        private static SqliteDataAdapter invFoldersDa;
+
+        private static bool m_Initialized = false;
+
+        public void Initialise()
+        {
+            m_log.Info("[SQLiteInventoryData]: " + Name + " cannot be default-initialized!");
+            throw new PluginNotInitialisedException(Name);
+        }
+
+        /// <summary>
+        /// <list type="bullet">
+        /// <item>Initialises Inventory interface</item>
+        /// <item>Loads and initialises a new SQLite connection and maintains it.</item>
+        /// <item>use default URI if connect string string is empty.</item>
+        /// </list>
+        /// </summary>
+        /// <param name="dbconnect">connect string</param>
+        public void Initialise(string dbconnect)
+        {
+            if (!m_Initialized)
+            {
+                m_Initialized = true;
+
+                if (dbconnect == string.Empty)
+                {
+                    dbconnect = "URI=file:inventoryStore.db,version=3";
+                }
+                m_log.Info("[INVENTORY DB]: Sqlite - connecting: " + dbconnect);
+                conn = new SqliteConnection(dbconnect);
+
+                conn.Open();
+
+                Assembly assem = GetType().Assembly;
+                Migration m = new Migration(conn, assem, "InventoryStore");
+                m.Update();
+
+                SqliteCommand itemsSelectCmd = new SqliteCommand(invItemsSelect, conn);
+                invItemsDa = new SqliteDataAdapter(itemsSelectCmd);
+                //            SqliteCommandBuilder primCb = new SqliteCommandBuilder(primDa);
+
+                SqliteCommand foldersSelectCmd = new SqliteCommand(invFoldersSelect, conn);
+                invFoldersDa = new SqliteDataAdapter(foldersSelectCmd);
+
+                ds = new DataSet();
+
+                ds.Tables.Add(createInventoryFoldersTable());
+                invFoldersDa.Fill(ds.Tables["inventoryfolders"]);
+                setupFoldersCommands(invFoldersDa, conn);
+                m_log.Info("[INVENTORY DB]: Populated Inventory Folders Definitions");
+
+                ds.Tables.Add(createInventoryItemsTable());
+                invItemsDa.Fill(ds.Tables["inventoryitems"]);
+                setupItemsCommands(invItemsDa, conn);
+                m_log.Info("[INVENTORY DB]: Populated Inventory Items Definitions");
+
+                ds.AcceptChanges();
+            }
+        }
+
+        /// <summary>
+        /// Closes the inventory interface
+        /// </summary>
+        public void Dispose()
+        {
+            if (conn != null)
+            {
+                conn.Close();
+                conn = null;
+            }
+            if (invItemsDa != null)
+            {
+                invItemsDa.Dispose();
+                invItemsDa = null;
+            }
+            if (invFoldersDa != null)
+            {
+                invFoldersDa.Dispose();
+                invFoldersDa = null;
+            }
+            if (ds != null)
+            {
+                ds.Dispose();
+                ds = null;
+            }
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="row"></param>
+        /// <returns></returns>
+        public InventoryItemBase buildItem(DataRow row)
+        {
+            InventoryItemBase item = new InventoryItemBase();
+            item.ID = new UUID((string) row["UUID"]);
+            item.AssetID = new UUID((string) row["assetID"]);
+            item.AssetType = Convert.ToInt32(row["assetType"]);
+            item.InvType = Convert.ToInt32(row["invType"]);
+            item.Folder = new UUID((string) row["parentFolderID"]);
+            item.Owner = new UUID((string) row["avatarID"]);
+            item.CreatorId = (string)row["creatorsID"];
+            item.Name = (string) row["inventoryName"];
+            item.Description = (string) row["inventoryDescription"];
+
+            item.NextPermissions = Convert.ToUInt32(row["inventoryNextPermissions"]);
+            item.CurrentPermissions = Convert.ToUInt32(row["inventoryCurrentPermissions"]);
+            item.BasePermissions = Convert.ToUInt32(row["inventoryBasePermissions"]);
+            item.EveryOnePermissions = Convert.ToUInt32(row["inventoryEveryOnePermissions"]);
+            item.GroupPermissions = Convert.ToUInt32(row["inventoryGroupPermissions"]);
+
+            // new fields
+            if (!Convert.IsDBNull(row["salePrice"]))
+                item.SalePrice = Convert.ToInt32(row["salePrice"]);
+
+            if (!Convert.IsDBNull(row["saleType"]))
+                item.SaleType = Convert.ToByte(row["saleType"]);
+
+            if (!Convert.IsDBNull(row["creationDate"]))
+                item.CreationDate = Convert.ToInt32(row["creationDate"]);
+
+            if (!Convert.IsDBNull(row["groupID"]))
+                item.GroupID = new UUID((string)row["groupID"]);
+
+            if (!Convert.IsDBNull(row["groupOwned"]))
+                item.GroupOwned = Convert.ToBoolean(row["groupOwned"]);
+
+            if (!Convert.IsDBNull(row["Flags"]))
+                item.Flags = Convert.ToUInt32(row["Flags"]);
+
+            return item;
+        }
+
+        /// <summary>
+        /// Fill a database row with item data
+        /// </summary>
+        /// <param name="row"></param>
+        /// <param name="item"></param>
+        private static void fillItemRow(DataRow row, InventoryItemBase item)
+        {
+            row["UUID"] = item.ID.ToString();
+            row["assetID"] = item.AssetID.ToString();
+            row["assetType"] = item.AssetType;
+            row["invType"] = item.InvType;
+            row["parentFolderID"] = item.Folder.ToString();
+            row["avatarID"] = item.Owner.ToString();
+            row["creatorsID"] = item.CreatorId.ToString();
+            row["inventoryName"] = item.Name;
+            row["inventoryDescription"] = item.Description;
+
+            row["inventoryNextPermissions"] = item.NextPermissions;
+            row["inventoryCurrentPermissions"] = item.CurrentPermissions;
+            row["inventoryBasePermissions"] = item.BasePermissions;
+            row["inventoryEveryOnePermissions"] = item.EveryOnePermissions;
+            row["inventoryGroupPermissions"] = item.GroupPermissions;
+
+            // new fields
+            row["salePrice"] = item.SalePrice;
+            row["saleType"] = item.SaleType;
+            row["creationDate"] = item.CreationDate;
+            row["groupID"] = item.GroupID.ToString();
+            row["groupOwned"] = item.GroupOwned;
+            row["flags"] = item.Flags;
+        }
+
+        /// <summary>
+        /// Add inventory folder
+        /// </summary>
+        /// <param name="folder">Folder base</param>
+        /// <param name="add">true=create folder. false=update existing folder</param>
+        /// <remarks>nasty</remarks>
+        private void addFolder(InventoryFolderBase folder, bool add)
+        {
+            lock (ds)
+            {
+                DataTable inventoryFolderTable = ds.Tables["inventoryfolders"];
+
+                DataRow inventoryRow = inventoryFolderTable.Rows.Find(folder.ID.ToString());
+                if (inventoryRow == null)
+                {
+                    if (! add)
+                        m_log.ErrorFormat("Interface Misuse: Attempting to Update non-existant inventory folder: {0}", folder.ID);
+
+                    inventoryRow = inventoryFolderTable.NewRow();
+                    fillFolderRow(inventoryRow, folder);
+                    inventoryFolderTable.Rows.Add(inventoryRow);
+                }
+                else
+                {
+                    if (add)
+                        m_log.ErrorFormat("Interface Misuse: Attempting to Add inventory folder that already exists: {0}", folder.ID);
+
+                    fillFolderRow(inventoryRow, folder);
+                }
+
+                invFoldersDa.Update(ds, "inventoryfolders");
+            }
+        }
+
+        /// <summary>
+        /// Move an inventory folder
+        /// </summary>
+        /// <param name="folder">folder base</param>
+        private void moveFolder(InventoryFolderBase folder)
+        {
+            lock (ds)
+            {
+                DataTable inventoryFolderTable = ds.Tables["inventoryfolders"];
+
+                DataRow inventoryRow = inventoryFolderTable.Rows.Find(folder.ID.ToString());
+                if (inventoryRow == null)
+                {
+                    inventoryRow = inventoryFolderTable.NewRow();
+                    fillFolderRow(inventoryRow, folder);
+                    inventoryFolderTable.Rows.Add(inventoryRow);
+                }
+                else
+                {
+                    moveFolderRow(inventoryRow, folder);
+                }
+
+                invFoldersDa.Update(ds, "inventoryfolders");
+            }
+        }
+
+        /// <summary>
+        /// add an item in inventory
+        /// </summary>
+        /// <param name="item">the item</param>
+        /// <param name="add">true=add item ; false=update existing item</param>
+        private void addItem(InventoryItemBase item, bool add)
+        {
+            lock (ds)
+            {
+                DataTable inventoryItemTable = ds.Tables["inventoryitems"];
+
+                DataRow inventoryRow = inventoryItemTable.Rows.Find(item.ID.ToString());
+                if (inventoryRow == null)
+                {
+                    if (!add)
+                        m_log.ErrorFormat("[INVENTORY DB]: Interface Misuse: Attempting to Update non-existant inventory item: {0}", item.ID);
+
+                    inventoryRow = inventoryItemTable.NewRow();
+                    fillItemRow(inventoryRow, item);
+                    inventoryItemTable.Rows.Add(inventoryRow);
+                }
+                else
+                {
+                    if (add)
+                        m_log.ErrorFormat("[INVENTORY DB]: Interface Misuse: Attempting to Add inventory item that already exists: {0}", item.ID);
+
+                    fillItemRow(inventoryRow, item);
+                }
+
+                invItemsDa.Update(ds, "inventoryitems");
+
+                DataTable inventoryFolderTable = ds.Tables["inventoryfolders"];
+
+                inventoryRow = inventoryFolderTable.Rows.Find(item.Folder.ToString());
+                if (inventoryRow != null) //MySQL doesn't throw an exception here, so sqlite shouldn't either.
+                    inventoryRow["version"] = (int)inventoryRow["version"] + 1;
+
+                invFoldersDa.Update(ds, "inventoryfolders");
+            }
+        }
+
+        /// <summary>
+        /// TODO : DataSet commit
+        /// </summary>
+        public void Shutdown()
+        {
+            // TODO: DataSet commit
+        }
+
+        /// <summary>
+        /// The name of this DB provider
+        /// </summary>
+        /// <returns>Name of DB provider</returns>
+        public string Name
+        {
+            get { return "SQLite Inventory Data Interface"; }
+        }
+
+        /// <summary>
+        /// Returns the version of this DB provider
+        /// </summary>
+        /// <returns>A string containing the DB provider version</returns>
+        public string Version
+        {
+            get
+            {
+                Module module = GetType().Module;
+                // string dllName = module.Assembly.ManifestModule.Name;
+                Version dllVersion = module.Assembly.GetName().Version;
+
+
+                return
+                    string.Format("{0}.{1}.{2}.{3}", dllVersion.Major, dllVersion.Minor, dllVersion.Build,
+                            dllVersion.Revision);
+            }
+        }
+
+        /// <summary>
+        /// Returns a list of inventory items contained within the specified folder
+        /// </summary>
+        /// <param name="folderID">The UUID of the target folder</param>
+        /// <returns>A List of InventoryItemBase items</returns>
+        public List<InventoryItemBase> getInventoryInFolder(UUID folderID)
+        {
+            lock (ds)
+            {
+                List<InventoryItemBase> retval = new List<InventoryItemBase>();
+                DataTable inventoryItemTable = ds.Tables["inventoryitems"];
+                string selectExp = "parentFolderID = '" + folderID + "'";
+                DataRow[] rows = inventoryItemTable.Select(selectExp);
+                foreach (DataRow row in rows)
+                {
+                    retval.Add(buildItem(row));
+                }
+
+                return retval;
+            }
+        }
+
+        /// <summary>
+        /// Returns a list of the root folders within a users inventory
+        /// </summary>
+        /// <param name="user">The user whos inventory is to be searched</param>
+        /// <returns>A list of folder objects</returns>
+        public List<InventoryFolderBase> getUserRootFolders(UUID user)
+        {
+            return new List<InventoryFolderBase>();
+        }
+
+        // see InventoryItemBase.getUserRootFolder
+        public InventoryFolderBase getUserRootFolder(UUID user)
+        {
+            lock (ds)
+            {
+                List<InventoryFolderBase> folders = new List<InventoryFolderBase>();
+                DataTable inventoryFolderTable = ds.Tables["inventoryfolders"];
+                string selectExp = "agentID = '" + user + "' AND parentID = '" + UUID.Zero + "'";
+                DataRow[] rows = inventoryFolderTable.Select(selectExp);
+                foreach (DataRow row in rows)
+                {
+                    folders.Add(buildFolder(row));
+                }
+
+                // There should only ever be one root folder for a user.  However, if there's more
+                // than one we'll simply use the first one rather than failing.  It would be even
+                // nicer to print some message to this effect, but this feels like it's too low a
+                // to put such a message out, and it's too minor right now to spare the time to
+                // suitably refactor.
+                if (folders.Count > 0)
+                {
+                    return folders[0];
+                }
+
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Append a list of all the child folders of a parent folder
+        /// </summary>
+        /// <param name="folders">list where folders will be appended</param>
+        /// <param name="parentID">ID of parent</param>
+        protected void getInventoryFolders(ref List<InventoryFolderBase> folders, UUID parentID)
+        {
+            lock (ds)
+            {
+                DataTable inventoryFolderTable = ds.Tables["inventoryfolders"];
+                string selectExp = "parentID = '" + parentID + "'";
+                DataRow[] rows = inventoryFolderTable.Select(selectExp);
+                foreach (DataRow row in rows)
+                {
+                    folders.Add(buildFolder(row));
+                }
+
+            }
+        }
+
+        /// <summary>
+        /// Returns a list of inventory folders contained in the folder 'parentID'
+        /// </summary>
+        /// <param name="parentID">The folder to get subfolders for</param>
+        /// <returns>A list of inventory folders</returns>
+        public List<InventoryFolderBase> getInventoryFolders(UUID parentID)
+        {
+            List<InventoryFolderBase> folders = new List<InventoryFolderBase>();
+            getInventoryFolders(ref folders, parentID);
+            return folders;
+        }
+
+        /// <summary>
+        /// See IInventoryDataPlugin
+        /// </summary>
+        /// <param name="parentID"></param>
+        /// <returns></returns>
+        public List<InventoryFolderBase> getFolderHierarchy(UUID parentID)
+        {
+            /* Note: There are subtle changes between this implementation of getFolderHierarchy and the previous one
+                 * - We will only need to hit the database twice instead of n times.
+                 * - We assume the database is well-formed - no stranded/dangling folders, all folders in heirarchy owned
+                 *   by the same person, each user only has 1 inventory heirarchy
+                 * - The returned list is not ordered, instead of breadth-first ordered
+               There are basically 2 usage cases for getFolderHeirarchy:
+                 1) Getting the user's entire inventory heirarchy when they log in
+                 2) Finding a subfolder heirarchy to delete when emptying the trash.
+               This implementation will pull all inventory folders from the database, and then prune away any folder that
+               is not part of the requested sub-heirarchy. The theory is that it is cheaper to make 1 request from the
+               database than to make n requests. This pays off only if requested heirarchy is large.
+               By making this choice, we are making the worst case better at the cost of making the best case worse
+                 - Francis
+             */
+
+            List<InventoryFolderBase> folders = new List<InventoryFolderBase>();
+            DataRow[] folderRows = null, parentRow;
+            InventoryFolderBase parentFolder = null;
+            lock (ds)
+            {
+                /* Fetch the parent folder from the database to determine the agent ID.
+                 * Then fetch all inventory folders for that agent from the agent ID.
+                 */
+                DataTable inventoryFolderTable = ds.Tables["inventoryfolders"];
+                string selectExp = "UUID = '" + parentID + "'";
+                parentRow = inventoryFolderTable.Select(selectExp); // Assume at most 1 result
+                if (parentRow.GetLength(0) >= 1)                    // No result means parent folder does not exist
+                {
+                    parentFolder = buildFolder(parentRow[0]);
+                    UUID agentID = parentFolder.Owner;
+                    selectExp = "agentID = '" + agentID + "'";
+                    folderRows = inventoryFolderTable.Select(selectExp);
+                }
+
+                if (folderRows != null && folderRows.GetLength(0) >= 1)   // No result means parent folder does not exist
+                {                                                       // or has no children
+                    /* if we're querying the root folder, just return an unordered list of all folders in the user's
+                     * inventory
+                     */
+                    if (parentFolder.ParentID == UUID.Zero)
+                    {
+                        foreach (DataRow row in folderRows)
+                        {
+                            InventoryFolderBase curFolder = buildFolder(row);
+                            if (curFolder.ID != parentID)   // Return all folders except the parent folder of heirarchy
+                                folders.Add(buildFolder(row));
+                        }
+                    } // If requesting root folder
+                    /* else we are querying a non-root folder. We currently have a list of all of the user's folders,
+                     * we must construct a list of all folders in the heirarchy below parentID.
+                     * Our first step will be to construct a hash table of all folders, indexed by parent ID.
+                     * Once we have constructed the hash table, we will do a breadth-first traversal on the tree using the
+                     * hash table to find child folders.
+                     */
+                    else
+                    {                                                         // Querying a non-root folder
+
+                        // Build a hash table of all user's inventory folders, indexed by each folder's parent ID
+                        Dictionary<UUID, List<InventoryFolderBase>> hashtable =
+                            new Dictionary<UUID, List<InventoryFolderBase>>(folderRows.GetLength(0));
+
+                        foreach (DataRow row in folderRows)
+                        {
+                            InventoryFolderBase curFolder = buildFolder(row);
+                            if (curFolder.ParentID != UUID.Zero) // Discard root of tree - not needed
+                            {
+                                if (hashtable.ContainsKey(curFolder.ParentID))
+                                {
+                                    // Current folder already has a sibling - append to sibling list
+                                    hashtable[curFolder.ParentID].Add(curFolder);
+                                }
+                                else
+                                {
+                                    List<InventoryFolderBase> siblingList = new List<InventoryFolderBase>();
+                                    siblingList.Add(curFolder);
+                                    // Current folder has no known (yet) siblings
+                                    hashtable.Add(curFolder.ParentID, siblingList);
+                                }
+                            }
+                        } // For all inventory folders
+
+                        // Note: Could release the ds lock here - we don't access folderRows or the database anymore.
+                        // This is somewhat of a moot point as the callers of this function usually lock db anyways.
+
+                        if (hashtable.ContainsKey(parentID)) // if requested folder does have children
+                            folders.AddRange(hashtable[parentID]);
+
+                        // BreadthFirstSearch build inventory tree **Note: folders.Count is *not* static
+                        for (int i = 0; i < folders.Count; i++)
+                            if (hashtable.ContainsKey(folders[i].ID))
+                                folders.AddRange(hashtable[folders[i].ID]);
+
+                    } // if requesting a subfolder heirarchy
+                } // if folder parentID exists and has children
+            } // lock ds
+            return folders;
+        }
+
+        /// <summary>
+        /// Returns an inventory item by its UUID
+        /// </summary>
+        /// <param name="item">The UUID of the item to be returned</param>
+        /// <returns>A class containing item information</returns>
+        public InventoryItemBase getInventoryItem(UUID item)
+        {
+            lock (ds)
+            {
+                DataRow row = ds.Tables["inventoryitems"].Rows.Find(item.ToString());
+                if (row != null)
+                {
+                    return buildItem(row);
+                }
+                else
+                {
+                    return null;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Returns a specified inventory folder by its UUID
+        /// </summary>
+        /// <param name="folder">The UUID of the folder to be returned</param>
+        /// <returns>A class containing folder information</returns>
+        public InventoryFolderBase getInventoryFolder(UUID folder)
+        {
+            // TODO: Deep voodoo here.  If you enable this code then
+            // multi region breaks.  No idea why, but I figured it was
+            // better to leave multi region at this point.  It does mean
+            // that you don't get to see system textures why creating
+            // clothes and the like. :(
+            lock (ds)
+            {
+                DataRow row = ds.Tables["inventoryfolders"].Rows.Find(folder.ToString());
+                if (row != null)
+                {
+                    return buildFolder(row);
+                }
+                else
+                {
+                    return null;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Creates a new inventory item based on item
+        /// </summary>
+        /// <param name="item">The item to be created</param>
+        public void addInventoryItem(InventoryItemBase item)
+        {
+            addItem(item, true);
+        }
+
+        /// <summary>
+        /// Updates an inventory item with item (updates based on ID)
+        /// </summary>
+        /// <param name="item">The updated item</param>
+        public void updateInventoryItem(InventoryItemBase item)
+        {
+            addItem(item, false);
+        }
+
+        /// <summary>
+        /// Delete an inventory item
+        /// </summary>
+        /// <param name="item">The item UUID</param>
+        public void deleteInventoryItem(UUID itemID)
+        {
+            lock (ds)
+            {
+                DataTable inventoryItemTable = ds.Tables["inventoryitems"];
+
+                DataRow inventoryRow = inventoryItemTable.Rows.Find(itemID.ToString());
+                if (inventoryRow != null)
+                {
+                    inventoryRow.Delete();
+                }
+
+                invItemsDa.Update(ds, "inventoryitems");
+            }
+        }
+
+        public InventoryItemBase queryInventoryItem(UUID itemID)
+        {
+            return getInventoryItem(itemID);
+        }
+
+        public InventoryFolderBase queryInventoryFolder(UUID folderID)
+        {
+            return getInventoryFolder(folderID);
+        }
+
+        /// <summary>
+        /// Delete all items in the specified folder
+        /// </summary>
+        /// <param name="folderId">id of the folder, whose item content should be deleted</param>
+        /// <todo>this is horribly inefficient, but I don't want to ruin the overall structure of this implementation</todo>
+        private void deleteItemsInFolder(UUID folderId)
+        {
+            List<InventoryItemBase> items = getInventoryInFolder(folderId);
+
+            foreach (InventoryItemBase i in items)
+                deleteInventoryItem(i.ID);
+        }
+
+        /// <summary>
+        /// Adds a new folder specified by folder
+        /// </summary>
+        /// <param name="folder">The inventory folder</param>
+        public void addInventoryFolder(InventoryFolderBase folder)
+        {
+            addFolder(folder, true);
+        }
+
+        /// <summary>
+        /// Updates a folder based on its ID with folder
+        /// </summary>
+        /// <param name="folder">The inventory folder</param>
+        public void updateInventoryFolder(InventoryFolderBase folder)
+        {
+            addFolder(folder, false);
+        }
+
+        /// <summary>
+        /// Moves a folder based on its ID with folder
+        /// </summary>
+        /// <param name="folder">The inventory folder</param>
+        public void moveInventoryFolder(InventoryFolderBase folder)
+        {
+            moveFolder(folder);
+        }
+
+        /// <summary>
+        /// Delete a folder
+        /// </summary>
+        /// <remarks>
+        /// This will clean-up any child folders and child items as well
+        /// </remarks>
+        /// <param name="folderID">the folder UUID</param>
+        public void deleteInventoryFolder(UUID folderID)
+        {
+            lock (ds)
+            {
+                List<InventoryFolderBase> subFolders = getFolderHierarchy(folderID);
+
+                DataTable inventoryFolderTable = ds.Tables["inventoryfolders"];
+                DataRow inventoryRow;
+
+                //Delete all sub-folders
+                foreach (InventoryFolderBase f in subFolders)
+                {
+                    inventoryRow = inventoryFolderTable.Rows.Find(f.ID.ToString());
+                    if (inventoryRow != null)
+                    {
+                        deleteItemsInFolder(f.ID);
+                        inventoryRow.Delete();
+                    }
+                }
+
+                //Delete the actual row
+                inventoryRow = inventoryFolderTable.Rows.Find(folderID.ToString());
+                if (inventoryRow != null)
+                {
+                    deleteItemsInFolder(folderID);
+                    inventoryRow.Delete();
+                }
+
+                invFoldersDa.Update(ds, "inventoryfolders");
+            }
+        }
+
+        /***********************************************************************
+         *
+         *  Data Table definitions
+         *
+         **********************************************************************/
+
+        /// <summary>
+        /// Create the "inventoryitems" table
+        /// </summary>
+        private static DataTable createInventoryItemsTable()
+        {
+            DataTable inv = new DataTable("inventoryitems");
+
+            createCol(inv, "UUID", typeof (String)); //inventoryID
+            createCol(inv, "assetID", typeof (String));
+            createCol(inv, "assetType", typeof (Int32));
+            createCol(inv, "invType", typeof (Int32));
+            createCol(inv, "parentFolderID", typeof (String));
+            createCol(inv, "avatarID", typeof (String));
+            createCol(inv, "creatorsID", typeof (String));
+
+            createCol(inv, "inventoryName", typeof (String));
+            createCol(inv, "inventoryDescription", typeof (String));
+            // permissions
+            createCol(inv, "inventoryNextPermissions", typeof (Int32));
+            createCol(inv, "inventoryCurrentPermissions", typeof (Int32));
+            createCol(inv, "inventoryBasePermissions", typeof (Int32));
+            createCol(inv, "inventoryEveryOnePermissions", typeof (Int32));
+            createCol(inv, "inventoryGroupPermissions", typeof (Int32));
+
+            // sale info
+            createCol(inv, "salePrice", typeof(Int32));
+            createCol(inv, "saleType", typeof(Byte));
+
+            // creation date
+            createCol(inv, "creationDate", typeof(Int32));
+
+            // group info
+            createCol(inv, "groupID", typeof(String));
+            createCol(inv, "groupOwned", typeof(Boolean));
+
+            // Flags
+            createCol(inv, "flags", typeof(UInt32));
+
+            inv.PrimaryKey = new DataColumn[] { inv.Columns["UUID"] };
+            return inv;
+        }
+
+        /// <summary>
+        /// Creates the "inventoryfolders" table
+        /// </summary>
+        /// <returns></returns>
+        private static DataTable createInventoryFoldersTable()
+        {
+            DataTable fol = new DataTable("inventoryfolders");
+
+            createCol(fol, "UUID", typeof (String)); //folderID
+            createCol(fol, "name", typeof (String));
+            createCol(fol, "agentID", typeof (String));
+            createCol(fol, "parentID", typeof (String));
+            createCol(fol, "type", typeof (Int32));
+            createCol(fol, "version", typeof (Int32));
+
+            fol.PrimaryKey = new DataColumn[] {fol.Columns["UUID"]};
+            return fol;
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="da"></param>
+        /// <param name="conn"></param>
+        private void setupItemsCommands(SqliteDataAdapter da, SqliteConnection conn)
+        {
+            lock (ds)
+            {
+                da.InsertCommand = createInsertCommand("inventoryitems", ds.Tables["inventoryitems"]);
+                da.InsertCommand.Connection = conn;
+
+                da.UpdateCommand = createUpdateCommand("inventoryitems", "UUID=:UUID", ds.Tables["inventoryitems"]);
+                da.UpdateCommand.Connection = conn;
+
+                SqliteCommand delete = new SqliteCommand("delete from inventoryitems where UUID = :UUID");
+                delete.Parameters.Add(createSqliteParameter("UUID", typeof(String)));
+                delete.Connection = conn;
+                da.DeleteCommand = delete;
+            }
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="da"></param>
+        /// <param name="conn"></param>
+        private void setupFoldersCommands(SqliteDataAdapter da, SqliteConnection conn)
+        {
+            lock (ds)
+            {
+                da.InsertCommand = createInsertCommand("inventoryfolders", ds.Tables["inventoryfolders"]);
+                da.InsertCommand.Connection = conn;
+
+                da.UpdateCommand = createUpdateCommand("inventoryfolders", "UUID=:UUID", ds.Tables["inventoryfolders"]);
+                da.UpdateCommand.Connection = conn;
+
+                SqliteCommand delete = new SqliteCommand("delete from inventoryfolders where UUID = :UUID");
+                delete.Parameters.Add(createSqliteParameter("UUID", typeof(String)));
+                delete.Connection = conn;
+                da.DeleteCommand = delete;
+            }
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="row"></param>
+        /// <returns></returns>
+        private static InventoryFolderBase buildFolder(DataRow row)
+        {
+            InventoryFolderBase folder = new InventoryFolderBase();
+            folder.ID = new UUID((string) row["UUID"]);
+            folder.Name = (string) row["name"];
+            folder.Owner = new UUID((string) row["agentID"]);
+            folder.ParentID = new UUID((string) row["parentID"]);
+            folder.Type = Convert.ToInt16(row["type"]);
+            folder.Version = Convert.ToUInt16(row["version"]);
+            return folder;
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="row"></param>
+        /// <param name="folder"></param>
+        private static void fillFolderRow(DataRow row, InventoryFolderBase folder)
+        {
+            row["UUID"] = folder.ID.ToString();
+            row["name"] = folder.Name;
+            row["agentID"] = folder.Owner.ToString();
+            row["parentID"] = folder.ParentID.ToString();
+            row["type"] = folder.Type;
+            row["version"] = folder.Version;
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="row"></param>
+        /// <param name="folder"></param>
+        private static void moveFolderRow(DataRow row, InventoryFolderBase folder)
+        {
+            row["UUID"] = folder.ID.ToString();
+            row["parentID"] = folder.ParentID.ToString();
+        }
+
+        public List<InventoryItemBase> fetchActiveGestures (UUID avatarID)
+        {
+            lock (ds)
+            {
+                List<InventoryItemBase> items = new List<InventoryItemBase>();
+
+                DataTable inventoryItemTable = ds.Tables["inventoryitems"];
+                string selectExp 
+                    = "avatarID = '" + avatarID + "' AND assetType = " + (int)AssetType.Gesture + " AND flags = 1";
+                //m_log.DebugFormat("[SQL]: sql = " + selectExp);
+                DataRow[] rows = inventoryItemTable.Select(selectExp);
+                foreach (DataRow row in rows)
+                {
+                    items.Add(buildItem(row));
+                }
+                return items;
+            }
+        }
+    }
+}