Merge remote-tracking branch 'os/master'

1 files changed, 365 insertions, 0 deletions

diff --git a/OpenSim/Data/MySQL/MySQLGenericTableHandler.cs b/OpenSim/Data/MySQL/MySQLGenericTableHandler.cs
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+++ b/OpenSim/Data/MySQL/MySQLGenericTableHandler.cs
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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 MySql.Data.MySqlClient;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+
+namespace OpenSim.Data.MySQL
+{
+    public class MySQLGenericTableHandler<T> : MySqlFramework where T: class, new()
+    {
+//        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;
+
+        protected virtual Assembly Assembly
+        {
+            get { return GetType().Assembly; }
+        }
+
+        public MySQLGenericTableHandler(string connectionString,
+                string realm, string storeName) : base(connectionString)
+        {
+            m_Realm = realm;
+            m_connectionString = connectionString;
+            
+            if (storeName != String.Empty)
+            {
+                using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
+                {
+                    dbcon.Open();
+                    Migration m = new Migration(dbcon, Assembly, storeName);
+                    m.Update();
+                }
+            }
+
+            Type t = typeof(T);
+            FieldInfo[] fields = t.GetFields(BindingFlags.Public |
+                                             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;
+
+            List<string> columnNames = new List<string>();
+
+            DataTable schemaTable = reader.GetSchemaTable();
+            foreach (DataRow row in schemaTable.Rows)
+            {
+                if (row["ColumnName"] != null &&
+                        (!m_Fields.ContainsKey(row["ColumnName"].ToString())))
+                    columnNames.Add(row["ColumnName"].ToString());
+            }
+
+            m_ColumnNames = columnNames;
+        }
+
+        public virtual T[] Get(string field, string key)
+        {
+            return Get(new string[] { field }, new string[] { key });
+        }
+
+        public virtual T[] Get(string[] fields, string[] keys)
+        {
+            if (fields.Length != keys.Length)
+                return new T[0];
+
+            List<string> terms = new List<string>();
+
+            using (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)
+        {
+            List<T> result = new List<T>();
+
+            using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
+            {
+                dbcon.Open();
+                cmd.Connection = dbcon;
+
+                using (IDataReader reader = cmd.ExecuteReader())
+                {
+                    if (reader == null)
+                        return new T[0];
+
+                    CheckColumnNames(reader);
+
+                    while (reader.Read())
+                    {
+                        T row = new T();
+
+                        foreach (string name in m_Fields.Keys)
+                        {
+                            if (reader[name] is DBNull)
+                            {
+                                continue;
+                            }
+                            if (m_Fields[name].FieldType == typeof(bool))
+                            {
+                                int v = Convert.ToInt32(reader[name]);
+                                m_Fields[name].SetValue(row, v != 0 ? true : false);
+                            }
+                            else if (m_Fields[name].FieldType == typeof(UUID))
+                            {
+                                m_Fields[name].SetValue(row, DBGuid.FromDB(reader[name]));
+                            }
+                            else if (m_Fields[name].FieldType == typeof(int))
+                            {
+                                int v = Convert.ToInt32(reader[name]);
+                                m_Fields[name].SetValue(row, v);
+                            }
+                            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();
+                                if (data[col] == null)
+                                    data[col] = String.Empty;
+                            }
+
+                            m_DataField.SetValue(row, data);
+                        }
+
+                        result.Add(row);
+                    }
+                }
+            }
+
+            return result.ToArray();
+        }
+
+        public virtual T[] Get(string where)
+        {
+            using (MySqlCommand cmd = new MySqlCommand())
+            {
+                string query = String.Format("select * from {0} where {1}",
+                                             m_Realm, where);
+                
+                cmd.CommandText = query;
+                
+                return DoQuery(cmd);
+            }
+        }
+
+        public virtual bool Store(T row)
+        {
+//            m_log.DebugFormat("[MYSQL GENERIC TABLE HANDLER]: Store(T row) invoked");
+
+            using (MySqlCommand cmd = new MySqlCommand())
+            {
+                string query = "";
+                List<String> names = new List<String>();
+                List<String> values = new List<String>();
+
+                foreach (FieldInfo fi in m_Fields.Values)
+                {
+                    names.Add(fi.Name);
+                    values.Add("?" + fi.Name);
+                    
+                    // Temporarily return more information about what field is unexpectedly null for
+                    // http://opensimulator.org/mantis/view.php?id=5403.  This might be due to a bug in the 
+                    // InventoryTransferModule or we may be required to substitute a DBNull here.
+                    if (fi.GetValue(row) == null)
+                        throw new NullReferenceException(
+                            string.Format(
+                                "[MYSQL GENERIC TABLE HANDLER]: Trying to store field {0} for {1} which is unexpectedly null", 
+                                fi.Name, row));
+                    
+                    cmd.Parameters.AddWithValue(fi.Name, fi.GetValue(row).ToString());
+                }
+
+                if (m_DataField != null)
+                {
+                    Dictionary<string, string> data =
+                        (Dictionary<string, string>)m_DataField.GetValue(row);
+
+                    foreach (KeyValuePair<string, string> kvp in data)
+                    {
+                        names.Add(kvp.Key);
+                        values.Add("?" + kvp.Key);
+                        cmd.Parameters.AddWithValue("?" + kvp.Key, kvp.Value);
+                    }
+                }
+
+                query = String.Format("replace into {0} (`", m_Realm) + String.Join("`,`", names.ToArray()) + "`) values (" + String.Join(",", values.ToArray()) + ")";
+
+                cmd.CommandText = query;
+
+                if (ExecuteNonQuery(cmd) > 0)
+                    return true;
+
+                return false;
+            }
+        }
+
+        public virtual bool Delete(string field, string key)
+        {
+            return Delete(new string[] { field }, new string[] { key });
+        }
+
+        public virtual bool Delete(string[] fields, string[] keys)
+        {
+//            m_log.DebugFormat(
+//                "[MYSQL GENERIC TABLE HANDLER]: Delete(string[] fields, string[] keys) invoked with {0}:{1}",
+//                string.Join(",", fields), string.Join(",", keys));
+
+            if (fields.Length != keys.Length)
+                return false;
+
+            List<string> terms = new List<string>();
+
+            using (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("delete from {0} where {1}", m_Realm, where);
+
+                cmd.CommandText = query;
+
+                return ExecuteNonQuery(cmd) > 0;
+            }
+        }
+
+        public long GetCount(string field, string key)
+        {
+            return GetCount(new string[] { field }, new string[] { key });
+        }
+
+        public long GetCount(string[] fields, string[] keys)
+        {
+            if (fields.Length != keys.Length)
+                return 0;
+
+            List<string> terms = new List<string>();
+
+            using (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 count(*) from {0} where {1}",
+                                             m_Realm, where);
+
+                cmd.CommandText = query;
+
+                Object result = DoQueryScalar(cmd);
+
+                return Convert.ToInt64(result);
+            }
+        }
+
+        public long GetCount(string where)
+        {
+            using (MySqlCommand cmd = new MySqlCommand())
+            {
+                string query = String.Format("select count(*) from {0} where {1}",
+                                             m_Realm, where);
+
+                cmd.CommandText = query;
+
+                object result = DoQueryScalar(cmd);
+
+                return Convert.ToInt64(result);
+            }
+        }
+
+        public object DoQueryScalar(MySqlCommand cmd)
+        {
+            using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
+            {
+                dbcon.Open();
+                cmd.Connection = dbcon;
+
+                return cmd.ExecuteScalar();
+            }
+        }
+
+    }
+}
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