Merge branch 'master' into careminster

OpenSim/Data/MySQL/MySQLGenericTableHandler.cs

@@ -0,0 +1,200 @@
+/*
+ * 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 MySql.Data.MySqlClient;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+
+namespace OpenSim.Data.MySQL
+{
+    public class MySQLGenericTableHandler<T> : MySqlFramework where T: struct
+    {
+        private static readonly ILog m_log =
+            LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+
+        protected Dictionary<string, FieldInfo> m_Fields =
+                new Dictionary<string, FieldInfo>();
+
+        protected List<string> m_ColumnNames = null;
+        protected string m_Realm;
+        protected FieldInfo m_DataField = null;
+
+        public MySQLGenericTableHandler(string connectionString,
+                string realm, string storeName) : base(connectionString)
+        {
+            m_Realm = realm;
+            if (storeName != String.Empty)
+            {
+                Assembly assem = GetType().Assembly;
+
+                Migration m = new Migration(m_Connection, assem, storeName);
+                m.Update();
+            }
+
+            Type t = typeof(T);
+            FieldInfo[] fields = t.GetFields(BindingFlags.NonPublic |
+                                             BindingFlags.Instance |
+                                             BindingFlags.DeclaredOnly);
+
+            if (fields.Length == 0)
+                return;
+
+            foreach (FieldInfo f in  fields)
+            {
+                if (f.Name != "Data")
+                    m_Fields[f.Name] = f;
+                else
+                    m_DataField = f;
+            }
+        }
+
+        private void CheckColumnNames(IDataReader reader)
+        {
+            if (m_ColumnNames != null)
+                return;
+
+            m_ColumnNames = new List<string>();
+
+            DataTable schemaTable = reader.GetSchemaTable();
+            foreach (DataRow row in schemaTable.Rows)
+            {
+                if (row["ColumnName"] != null &&
+                        (!m_Fields.ContainsKey(row["ColumnName"].ToString())))
+                    m_ColumnNames.Add(row["ColumnName"].ToString());
+            }
+        }
+
+        public T[] Get(string field, string key)
+        {
+            return Get(new string[] { field }, new string[] { key });
+        }
+
+        public T[] Get(string[] fields, string[] keys)
+        {
+            if (fields.Length != keys.Length)
+                return new T[0];
+
+            List<string> terms = new List<string>();
+
+            MySqlCommand cmd = new MySqlCommand();
+
+            for (int i = 0 ; i < fields.Length ; i++)
+            {
+                cmd.Parameters.AddWithValue(fields[i], keys[i]);
+                terms.Add(fields[i] + " = ?" + fields[i]);
+            }
+
+            string where = String.Join(" and ", terms.ToArray());
+
+            string query = String.Format("select * from {0} where {1}",
+                    m_Realm, where);
+
+            cmd.CommandText = query;
+
+            return DoQuery(cmd);
+        }
+
+        protected T[] DoQuery(MySqlCommand cmd)
+        {
+            IDataReader reader = ExecuteReader(cmd);
+            if (reader == null)
+                return new T[0];
+
+            CheckColumnNames(reader);
+
+            List<T> result = new List<T>();
+
+            while(reader.Read())
+            {
+                T row = new T();
+
+                foreach (string name in m_Fields.Keys)
+                {
+                    if (m_Fields[name].GetValue(row) is bool)
+                    {
+                        int v = Convert.ToInt32(reader[name]);
+                        m_Fields[name].SetValue(row, v != 0 ? true : false);
+                    }
+                    else if(m_Fields[name].GetValue(row) is UUID)
+                    {
+                        UUID uuid = UUID.Zero;
+
+                        UUID.TryParse(reader[name].ToString(), out uuid);
+                        m_Fields[name].SetValue(row, uuid);
+                    }
+                    else
+                    {
+                        m_Fields[name].SetValue(row, reader[name]);
+                    }
+                }
+                
+                if (m_DataField != null)
+                {
+                    Dictionary<string, string> data =
+                            new Dictionary<string, string>();
+
+                    foreach (string col in m_ColumnNames)
+                        data[col] = reader[col].ToString();
+
+                    m_DataField.SetValue(row, data);
+                }
+
+                result.Add(row);
+            }
+
+            CloseReaderCommand(cmd);
+
+            return result.ToArray();
+        }
+
+        public T[] Get(string where)
+        {
+            MySqlCommand cmd = new MySqlCommand();
+
+            string query = String.Format("select * from {0} where {1}",
+                    m_Realm, where);
+
+            cmd.CommandText = query;
+
+            return DoQuery(cmd);
+        }
+
+        public void Store(T row)
+        {
+            MySqlCommand cmd = new MySqlCommand();
+
+            string query = "";
+        }
+    }
+}