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-rw-r--r--OpenSim/Data/Base/BaseDatabaseConnector.cs185
1 files changed, 0 insertions, 185 deletions
diff --git a/OpenSim/Data/Base/BaseDatabaseConnector.cs b/OpenSim/Data/Base/BaseDatabaseConnector.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 OpenSim 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.Data.Common;
32
33namespace OpenSim.Data.Base
34{
35 /// <summary>
36 ///
37 /// </summary>
38 public abstract class BaseDatabaseConnector
39 {
40 protected string m_connectionString;
41
42 /// <summary>
43 ///
44 /// </summary>
45 /// <param name="connectionString"></param>
46 public BaseDatabaseConnector(string connectionString)
47 {
48 m_connectionString = connectionString;
49 }
50
51 public abstract DbConnection GetNewConnection();
52 public abstract string CreateParamName(string fieldName);
53
54 /// <summary>
55 ///
56 /// </summary>
57 /// <param name="mapper"></param>
58 /// <param name="connection"></param>
59 /// <param name="fieldName"></param>
60 /// <param name="key"></param>
61 /// <returns></returns>
62 public DbCommand CreateSelectCommand(BaseTableMapper mapper, DbConnection connection, string fieldName, object key)
63 {
64 string table = mapper.TableName;
65
66 DbCommand command = connection.CreateCommand();
67
68 string conditionString = CreateCondition(mapper, command, fieldName, key);
69
70 string query =
71 String.Format("select * from {0} where {1}", table, conditionString);
72
73 command.CommandText = query;
74 command.CommandType = CommandType.Text;
75
76 return command;
77 }
78
79 /// <summary>
80 ///
81 /// </summary>
82 /// <param name="mapper"></param>
83 /// <param name="command"></param>
84 /// <param name="fieldName"></param>
85 /// <param name="key"></param>
86 /// <returns></returns>
87 public string CreateCondition(BaseTableMapper mapper, DbCommand command, string fieldName, object key)
88 {
89 string keyFieldParamName = mapper.CreateParamName(fieldName);
90
91 DbParameter param = command.CreateParameter();
92 param.ParameterName = keyFieldParamName;
93 param.Value = ConvertToDbType(key);
94 command.Parameters.Add(param);
95
96 return String.Format("{0}={1}", fieldName, keyFieldParamName);
97 }
98
99 /// <summary>
100 ///
101 /// </summary>
102 /// <param name="mapper"></param>
103 /// <param name="connection"></param>
104 /// <param name="rowMapper"></param>
105 /// <param name="primaryKey"></param>
106 /// <returns></returns>
107 public DbCommand CreateUpdateCommand(BaseTableMapper mapper, DbConnection connection, object rowMapper, object primaryKey)
108 {
109 string table = mapper.TableName;
110
111 List<string> fieldNames = new List<string>();
112
113 DbCommand command = connection.CreateCommand();
114
115 foreach (BaseFieldMapper fieldMapper in mapper.Schema.Fields.Values)
116 {
117 if (fieldMapper != mapper.KeyFieldMapper)
118 {
119 fieldMapper.ExpandField(rowMapper, command, fieldNames);
120 }
121 }
122
123 List<string> assignments = new List<string>();
124
125 foreach (string field in fieldNames)
126 {
127 assignments.Add(String.Format("{0}={1}", field, mapper.CreateParamName(field)));
128 }
129
130 string conditionString = mapper.CreateCondition(command, mapper.KeyFieldMapper.FieldName, primaryKey);
131
132 command.CommandText =
133 String.Format("update {0} set {1} where {2}", table, String.Join(", ", assignments.ToArray()),
134 conditionString);
135
136 return command;
137 }
138
139 /// <summary>
140 ///
141 /// </summary>
142 /// <param name="mapper"></param>
143 /// <param name="connection"></param>
144 /// <param name="obj"></param>
145 /// <returns></returns>
146 public DbCommand CreateInsertCommand(BaseTableMapper mapper, DbConnection connection, object obj)
147 {
148 string table = mapper.TableName;
149
150 List<string> fieldNames = new List<string>();
151
152 DbCommand command = connection.CreateCommand();
153
154 foreach (BaseFieldMapper fieldMapper in mapper.Schema.Fields.Values)
155 {
156 fieldMapper.ExpandField(obj, command, fieldNames);
157 }
158
159 List<string> paramNames = new List<string>();
160
161 foreach (string field in fieldNames)
162 {
163 paramNames.Add(mapper.CreateParamName(field));
164 }
165
166 command.CommandText =
167 String.Format("insert into {0} ({1}) values ({2})", table, String.Join(", ", fieldNames.ToArray()),
168 String.Join(", ", paramNames.ToArray()));
169
170 return command;
171 }
172
173 /// <summary>
174 ///
175 /// </summary>
176 /// <param name="value"></param>
177 /// <returns></returns>
178 public virtual object ConvertToDbType(object value)
179 {
180 return value;
181 }
182
183 public abstract BaseDataReader CreateReader(IDataReader reader);
184 }
185}
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