1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
//
// System.Data.Common.DbProviderFactories.cs
//
// Author:
// Sureshkumar T (tsureshkumar@novell.com)
// Tim Coleman (tim@timcoleman.com)
//
// Copyright (C) Tim Coleman, 2003
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_2_0
using System.Threading;
using System.Reflection;
using System.Collections;
using System.Configuration;
namespace System.Data.Common {
public static class DbProviderFactories
{
private static object configEntries = null; // DataSet
private const string CONFIG_SECTION_NAME = "system.data";
private const string CONFIG_SEC_TABLE_NAME = "DbProviderFactories";
#region Methods
public static DbProviderFactory GetFactory (DataRow providerRow)
{
string assemblyType = (string) providerRow ["AssemblyQualifiedName"];
#if TARGET_JVM // case insensitive GetType is not supported
Type type = Type.GetType (assemblyType, false);
#else
Type type = Type.GetType (assemblyType, false, true);
#endif
if (type != null && type.IsSubclassOf (typeof (DbProviderFactory))) {
// Provider factories are singletons with Instance field having
// the sole instance
FieldInfo field = type.GetField ("Instance", BindingFlags.Public |
BindingFlags.Static);
if (field != null) {
return field.GetValue (null) as DbProviderFactory;
}
}
throw new ConfigurationException("DataProvider is missing!");
}
public static DbProviderFactory GetFactory (string providerInvariantName)
{
DataTable table = GetFactoryClasses ();
if (table != null) {
DataRow row = table.Rows.Find (providerInvariantName);
if (row != null)
return GetFactory (row);
}
throw new ConfigurationException ("DataProvider is not found!");
}
public static DataTable GetFactoryClasses ()
{
DataSet ds = GetConfigEntries ();
DataTable table = ds != null ? ds.Tables [CONFIG_SEC_TABLE_NAME] : null;
if (table != null)
table = table.Copy (); // avoid modifications by user
return table;
}
#endregion // Methods
#region Internal Methods
internal static DataSet GetConfigEntries ()
{
if (configEntries != null)
return configEntries as DataSet;
DataSet ds = (DataSet) ConfigurationSettings.GetConfig (CONFIG_SECTION_NAME);
Interlocked.CompareExchange (ref configEntries, ds, null);
return configEntries as DataSet;
}
#endregion Internal Methods
}
}
#endif // NET_2_0
|
