455 lines
16 KiB
C#
455 lines
16 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Reflection;
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using System.Text;
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using MySql.Data.MySqlClient;
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using OpenMetaverse;
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namespace OpenSim.Data.MySQL
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{
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public class MySQLGenericTableHandler<T> : MySqlFramework where T: class, new()
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{
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// private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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protected Dictionary<string, FieldInfo> m_Fields =
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new Dictionary<string, FieldInfo>();
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protected List<string> m_ColumnNames = null;
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protected string m_Realm;
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protected FieldInfo m_DataField = null;
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protected virtual Assembly Assembly
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{
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get { return GetType().Assembly; }
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}
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public MySQLGenericTableHandler(MySqlTransaction trans,
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string realm, string storeName) : base(trans)
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{
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m_Realm = realm;
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CommonConstruct(storeName);
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}
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public MySQLGenericTableHandler(string connectionString,
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string realm, string storeName) : base(connectionString)
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{
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m_Realm = realm;
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CommonConstruct(storeName);
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}
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protected void CommonConstruct(string storeName)
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{
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if (storeName != String.Empty)
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{
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// We always use a new connection for any Migrations
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using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
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{
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dbcon.Open();
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Migration m = new Migration(dbcon, Assembly, storeName);
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m.Update();
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}
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}
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Type t = typeof(T);
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FieldInfo[] fields = t.GetFields(BindingFlags.Public |
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BindingFlags.Instance |
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BindingFlags.DeclaredOnly);
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if (fields.Length == 0)
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return;
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foreach (FieldInfo f in fields)
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{
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if (f.Name != "Data")
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m_Fields[f.Name] = f;
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else
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m_DataField = f;
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}
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}
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private void CheckColumnNames(IDataReader reader)
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{
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if (m_ColumnNames != null)
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return;
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List<string> columnNames = new List<string>();
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DataTable schemaTable = reader.GetSchemaTable();
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foreach (DataRow row in schemaTable.Rows)
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{
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if (row["ColumnName"] != null &&
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(!m_Fields.ContainsKey(row["ColumnName"].ToString())))
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columnNames.Add(row["ColumnName"].ToString());
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}
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m_ColumnNames = columnNames;
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}
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public virtual T[] Get(string field, string key)
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{
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using (MySqlCommand cmd = new MySqlCommand())
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{
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cmd.Parameters.AddWithValue(field, key);
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cmd.CommandText = string.Format("select * from {0} where `{1}` = ?{1}", m_Realm, field);
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return DoQuery(cmd);
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}
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}
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public virtual T[] Get(string field, string[] keys)
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{
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int flen = keys.Length;
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if(flen == 0)
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return new T[0];
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int flast = flen - 1;
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StringBuilder sb = new StringBuilder(1024);
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sb.AppendFormat("select * from {0} where {1} IN (?", m_Realm, field);
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using (MySqlCommand cmd = new MySqlCommand())
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{
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for (int i = 0 ; i < flen ; i++)
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{
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string fname = field + i.ToString();
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cmd.Parameters.AddWithValue(fname, keys[i]);
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sb.Append(fname);
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if(i < flast)
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sb.Append(",?");
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else
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sb.Append(")");
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}
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cmd.CommandText = sb.ToString();
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return DoQuery(cmd);
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}
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}
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public virtual T[] Get(string[] fields, string[] keys)
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{
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return Get(fields, keys, String.Empty);
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}
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public virtual T[] Get(string[] fields, string[] keys, string options)
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{
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int flen = fields.Length;
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if (flen == 0 || flen != keys.Length)
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return new T[0];
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int flast = flen - 1;
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StringBuilder sb = new StringBuilder(1024);
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sb.AppendFormat("select * from {0} where ", m_Realm);
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using (MySqlCommand cmd = new MySqlCommand())
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{
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for (int i = 0 ; i < flen ; i++)
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{
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cmd.Parameters.AddWithValue(fields[i], keys[i]);
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if(i < flast)
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sb.AppendFormat("`{0}` = ?{0} and ", fields[i]);
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else
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sb.AppendFormat("`{0}` = ?{0} ", fields[i]);
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}
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sb.Append(options);
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cmd.CommandText = sb.ToString();
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return DoQuery(cmd);
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}
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}
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protected T[] DoQuery(MySqlCommand cmd)
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{
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if (m_trans == null)
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{
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using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
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{
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dbcon.Open();
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T[] ret = DoQueryWithConnection(cmd, dbcon);
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dbcon.Close();
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return ret;
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}
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}
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else
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{
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return DoQueryWithTransaction(cmd, m_trans);
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}
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}
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protected T[] DoQueryWithTransaction(MySqlCommand cmd, MySqlTransaction trans)
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{
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cmd.Transaction = trans;
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return DoQueryWithConnection(cmd, trans.Connection);
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}
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protected T[] DoQueryWithConnection(MySqlCommand cmd, MySqlConnection dbcon)
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{
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List<T> result = new List<T>();
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cmd.Connection = dbcon;
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using (IDataReader reader = cmd.ExecuteReader())
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{
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if (reader == null)
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return new T[0];
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CheckColumnNames(reader);
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while (reader.Read())
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{
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T row = new T();
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foreach (string name in m_Fields.Keys)
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{
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if (reader[name] is DBNull)
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{
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continue;
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}
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if (m_Fields[name].FieldType == typeof(bool))
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{
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int v = Convert.ToInt32(reader[name]);
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m_Fields[name].SetValue(row, v != 0);
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}
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else if (m_Fields[name].FieldType == typeof(UUID))
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{
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m_Fields[name].SetValue(row, DBGuid.FromDB(reader[name]));
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}
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else if (m_Fields[name].FieldType == typeof(int))
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{
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int v = Convert.ToInt32(reader[name]);
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m_Fields[name].SetValue(row, v);
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}
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else if (m_Fields[name].FieldType == typeof(uint))
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{
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uint v = Convert.ToUInt32(reader[name]);
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m_Fields[name].SetValue(row, v);
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}
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else
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{
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m_Fields[name].SetValue(row, reader[name]);
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}
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}
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if (m_DataField != null)
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{
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Dictionary<string, string> data =
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new Dictionary<string, string>();
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foreach (string col in m_ColumnNames)
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{
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data[col] = reader[col].ToString();
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if (data[col] == null)
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data[col] = String.Empty;
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}
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m_DataField.SetValue(row, data);
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}
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result.Add(row);
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}
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}
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cmd.Connection = null;
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return result.ToArray();
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}
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public virtual T[] Get(string where)
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{
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using (MySqlCommand cmd = new MySqlCommand())
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{
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string query = String.Format("select * from {0} where {1}",
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m_Realm, where);
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cmd.CommandText = query;
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return DoQuery(cmd);
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}
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}
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public virtual bool Store(T row)
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{
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// m_log.DebugFormat("[MYSQL GENERIC TABLE HANDLER]: Store(T row) invoked");
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using (MySqlCommand cmd = new MySqlCommand())
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{
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string query = "";
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List<String> names = new List<String>();
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List<String> values = new List<String>();
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foreach (FieldInfo fi in m_Fields.Values)
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{
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names.Add(fi.Name);
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values.Add("?" + fi.Name);
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// Temporarily return more information about what field is unexpectedly null for
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// http://opensimulator.org/mantis/view.php?id=5403. This might be due to a bug in the
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// InventoryTransferModule or we may be required to substitute a DBNull here.
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if (fi.GetValue(row) == null)
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throw new NullReferenceException(
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string.Format(
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"[MYSQL GENERIC TABLE HANDLER]: Trying to store field {0} for {1} which is unexpectedly null",
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fi.Name, row));
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cmd.Parameters.AddWithValue(fi.Name, fi.GetValue(row).ToString());
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}
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if (m_DataField != null)
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{
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Dictionary<string, string> data =
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(Dictionary<string, string>)m_DataField.GetValue(row);
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foreach (KeyValuePair<string, string> kvp in data)
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{
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names.Add(kvp.Key);
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values.Add("?" + kvp.Key);
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cmd.Parameters.AddWithValue("?" + kvp.Key, kvp.Value);
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}
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}
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query = String.Format("replace into {0} (`", m_Realm) + String.Join("`,`", names.ToArray()) + "`) values (" + String.Join(",", values.ToArray()) + ")";
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cmd.CommandText = query;
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if (ExecuteNonQuery(cmd) > 0)
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return true;
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return false;
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}
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}
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public virtual bool Delete(string field, string key)
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{
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return Delete(new string[] { field }, new string[] { key });
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}
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public virtual bool Delete(string[] fields, string[] keys)
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{
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// m_log.DebugFormat(
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// "[MYSQL GENERIC TABLE HANDLER]: Delete(string[] fields, string[] keys) invoked with {0}:{1}",
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// string.Join(",", fields), string.Join(",", keys));
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int flen = fields.Length;
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if (flen == 0 || flen != keys.Length)
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return false;
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int flast = flen - 1;
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StringBuilder sb = new StringBuilder(1024);
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sb.AppendFormat("delete from {0} where ", m_Realm);
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using (MySqlCommand cmd = new MySqlCommand())
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{
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for (int i = 0 ; i < flen ; i++)
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{
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cmd.Parameters.AddWithValue(fields[i], keys[i]);
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if(i < flast)
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sb.AppendFormat("`{0}` = ?{0} and ", fields[i]);
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else
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sb.AppendFormat("`{0}` = ?{0}", fields[i]);
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}
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cmd.CommandText = sb.ToString();
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return ExecuteNonQuery(cmd) > 0;
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}
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}
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public long GetCount(string field, string key)
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{
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return GetCount(new string[] { field }, new string[] { key });
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}
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public long GetCount(string[] fields, string[] keys)
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{
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int flen = fields.Length;
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if (flen == 0 || flen != keys.Length)
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return 0;
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int flast = flen - 1;
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StringBuilder sb = new StringBuilder(1024);
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sb.AppendFormat("select count(*) from {0} where ", m_Realm);
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using (MySqlCommand cmd = new MySqlCommand())
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{
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for (int i = 0 ; i < flen ; i++)
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{
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cmd.Parameters.AddWithValue(fields[i], keys[i]);
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if(i < flast)
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sb.AppendFormat("`{0}` = ?{0} and ", fields[i]);
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else
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sb.AppendFormat("`{0}` = ?{0}", fields[i]);
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}
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cmd.CommandText = sb.ToString();
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object result = DoQueryScalar(cmd);
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return Convert.ToInt64(result);
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}
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}
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public long GetCount(string where)
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{
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using (MySqlCommand cmd = new MySqlCommand())
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{
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string query = String.Format("select count(*) from {0} where {1}",
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m_Realm, where);
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cmd.CommandText = query;
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object result = DoQueryScalar(cmd);
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return Convert.ToInt64(result);
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}
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}
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public object DoQueryScalar(MySqlCommand cmd)
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{
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if (m_trans == null)
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{
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using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
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{
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dbcon.Open();
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cmd.Connection = dbcon;
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object ret = cmd.ExecuteScalar();
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cmd.Connection = null;
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dbcon.Close();
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return ret;
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}
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}
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else
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{
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cmd.Connection = m_trans.Connection;
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cmd.Transaction = m_trans;
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return cmd.ExecuteScalar();
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}
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}
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}
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}
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