/* * 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) { 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) { 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; } } } }