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-rw-r--r--OpenSim/Data/SQLite/SQLiteGenericTableHandler.cs253
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diff --git a/OpenSim/Data/SQLite/SQLiteGenericTableHandler.cs b/OpenSim/Data/SQLite/SQLiteGenericTableHandler.cs
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.Collections.Generic;
30using System.Data;
31using System.Reflection;
32using log4net;
33using Mono.Data.SqliteClient;
34using OpenMetaverse;
35using OpenSim.Framework;
36using OpenSim.Region.Framework.Interfaces;
37
38namespace OpenSim.Data.SQLite
39{
40 public class SQLiteGenericTableHandler<T> : SQLiteFramework where T: class, new()
41 {
42 private static readonly ILog m_log =
43 LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
44
45
46 protected Dictionary<string, FieldInfo> m_Fields =
47 new Dictionary<string, FieldInfo>();
48
49 protected List<string> m_ColumnNames = null;
50 protected string m_Realm;
51 protected FieldInfo m_DataField = null;
52
53 public SQLiteGenericTableHandler(string connectionString,
54 string realm, string storeName) : base(connectionString)
55 {
56 m_Realm = realm;
57 if (storeName != String.Empty)
58 {
59 Assembly assem = GetType().Assembly;
60
61 Migration m = new Migration(m_Connection, assem, storeName);
62 m.Update();
63 }
64
65 Type t = typeof(T);
66 FieldInfo[] fields = t.GetFields(BindingFlags.Public |
67 BindingFlags.Instance |
68 BindingFlags.DeclaredOnly);
69
70 if (fields.Length == 0)
71 return;
72
73 foreach (FieldInfo f in fields)
74 {
75 if (f.Name != "Data")
76 m_Fields[f.Name] = f;
77 else
78 m_DataField = f;
79 }
80 }
81
82 private void CheckColumnNames(IDataReader reader)
83 {
84 if (m_ColumnNames != null)
85 return;
86
87 m_ColumnNames = new List<string>();
88
89 DataTable schemaTable = reader.GetSchemaTable();
90 foreach (DataRow row in schemaTable.Rows)
91 {
92 if (row["ColumnName"] != null &&
93 (!m_Fields.ContainsKey(row["ColumnName"].ToString())))
94 m_ColumnNames.Add(row["ColumnName"].ToString());
95 }
96 }
97
98 public T[] Get(string field, string key)
99 {
100 return Get(new string[] { field }, new string[] { key });
101 }
102
103 public T[] Get(string[] fields, string[] keys)
104 {
105 if (fields.Length != keys.Length)
106 return new T[0];
107
108 List<string> terms = new List<string>();
109
110 SqliteCommand cmd = new SqliteCommand();
111
112 for (int i = 0 ; i < fields.Length ; i++)
113 {
114 cmd.Parameters.Add(new SqliteParameter(":" + fields[i], keys[i]));
115 terms.Add("`" + fields[i] + "` = :" + fields[i]);
116 }
117
118 string where = String.Join(" and ", terms.ToArray());
119
120 string query = String.Format("select * from {0} where {1}",
121 m_Realm, where);
122
123 cmd.CommandText = query;
124
125 return DoQuery(cmd);
126 }
127
128 protected T[] DoQuery(SqliteCommand cmd)
129 {
130 IDataReader reader = ExecuteReader(cmd);
131 if (reader == null)
132 return new T[0];
133
134 CheckColumnNames(reader);
135
136 List<T> result = new List<T>();
137
138 while (reader.Read())
139 {
140 T row = new T();
141
142 foreach (string name in m_Fields.Keys)
143 {
144 if (m_Fields[name].GetValue(row) is bool)
145 {
146 int v = Convert.ToInt32(reader[name]);
147 m_Fields[name].SetValue(row, v != 0 ? true : false);
148 }
149 else if (m_Fields[name].GetValue(row) is UUID)
150 {
151 UUID uuid = UUID.Zero;
152
153 UUID.TryParse(reader[name].ToString(), out uuid);
154 m_Fields[name].SetValue(row, uuid);
155 }
156 else if (m_Fields[name].GetValue(row) is int)
157 {
158 int v = Convert.ToInt32(reader[name]);
159 m_Fields[name].SetValue(row, v);
160 }
161 else
162 {
163 m_Fields[name].SetValue(row, reader[name]);
164 }
165 }
166
167 if (m_DataField != null)
168 {
169 Dictionary<string, string> data =
170 new Dictionary<string, string>();
171
172 foreach (string col in m_ColumnNames)
173 {
174 data[col] = reader[col].ToString();
175 if (data[col] == null)
176 data[col] = String.Empty;
177 }
178
179 m_DataField.SetValue(row, data);
180 }
181
182 result.Add(row);
183 }
184
185 CloseReaderCommand(cmd);
186
187 return result.ToArray();
188 }
189
190 public T[] Get(string where)
191 {
192 SqliteCommand cmd = new SqliteCommand();
193
194 string query = String.Format("select * from {0} where {1}",
195 m_Realm, where);
196
197 cmd.CommandText = query;
198
199 return DoQuery(cmd);
200 }
201
202 public bool Store(T row)
203 {
204 SqliteCommand cmd = new SqliteCommand();
205
206 string query = "";
207 List<String> names = new List<String>();
208 List<String> values = new List<String>();
209
210 foreach (FieldInfo fi in m_Fields.Values)
211 {
212 names.Add(fi.Name);
213 values.Add(":" + fi.Name);
214 cmd.Parameters.Add(new SqliteParameter(":" + fi.Name, fi.GetValue(row).ToString()));
215 }
216
217 if (m_DataField != null)
218 {
219 Dictionary<string, string> data =
220 (Dictionary<string, string>)m_DataField.GetValue(row);
221
222 foreach (KeyValuePair<string, string> kvp in data)
223 {
224 names.Add(kvp.Key);
225 values.Add(":" + kvp.Key);
226 cmd.Parameters.Add(new SqliteParameter(":" + kvp.Key, kvp.Value));
227 }
228 }
229
230 query = String.Format("replace into {0} (`", m_Realm) + String.Join("`,`", names.ToArray()) + "`) values (" + String.Join(",", values.ToArray()) + ")";
231
232 cmd.CommandText = query;
233
234 if (ExecuteNonQuery(cmd) > 0)
235 return true;
236
237 return false;
238 }
239
240 public bool Delete(string field, string val)
241 {
242 SqliteCommand cmd = new SqliteCommand();
243
244 cmd.CommandText = String.Format("delete from {0} where `{1}` = :{1}", m_Realm, field);
245 cmd.Parameters.Add(new SqliteParameter(field, val));
246
247 if (ExecuteNonQuery(cmd) > 0)
248 return true;
249
250 return false;
251 }
252 }
253}