mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/LINQ/SQLiteFactory_Linq.cs

   1 /********************************************************\r
   2  * ADO.NET 2.0 Data Provider for SQLite Version 3.X\r
   3  * Written by Robert Simpson (robert@blackcastlesoft.com)\r
   4  * \r
   5  * Released to the public domain, use at your own risk!\r
   6  ********************************************************/\r
   7 \r
   8 namespace Mono.Data.Sqlite\r
   9 {\r
  10   using System;\r
  11   using System.Data.Common;\r
  12   using System.Reflection;\r
  13   using System.Security.Permissions;\r
  14 \r
  15   /// <summary>\r
  16   /// SQLite implementation of DbProviderFactory.\r
  17   /// </summary>\r
  18   public sealed partial class SQLiteFactory : IServiceProvider\r
  19   {\r
  20     private static Type _dbProviderServicesType;\r
  21     private static object _sqliteServices;\r
  22 \r
  23     static SQLiteFactory()\r
  24     {\r
  25       _dbProviderServicesType = Type.GetType("System.Data.Common.DbProviderServices, System.Data.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", false);\r
  26     }\r
  27 \r
  28     /// <summary>\r
  29     /// Will provide a DbProviderServices object in .NET 3.5\r
  30     /// </summary>\r
  31     /// <param name="serviceType">The class or interface type to query for</param>\r
  32     /// <returns></returns>\r
  33     object IServiceProvider.GetService(Type serviceType)\r
  34     {\r
  35       if (serviceType == typeof(ISQLiteSchemaExtensions) ||\r
  36         (_dbProviderServicesType != null && serviceType == _dbProviderServicesType))\r
  37       {\r
  38         return GetSQLiteProviderServicesInstance();\r
  39       }\r
  40       return null;\r
  41     }\r
  42 \r
  43     [ReflectionPermission(SecurityAction.Assert, MemberAccess = true)]\r
  44     private object GetSQLiteProviderServicesInstance()\r
  45     {\r
  46       if (_sqliteServices == null)\r
  47       {\r
  48         Type type = Type.GetType("Mono.Data.Sqlite.SQLiteProviderServices, Mono.Data.Sqlite.Linq, Version=2.0.38.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139", false);\r
  49         if (type != null)\r
  50         {\r
  51           FieldInfo field = type.GetField("Instance", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance);\r
  52           _sqliteServices = field.GetValue(null);\r
  53         }\r
  54       }\r
  55       return _sqliteServices;\r
  56     }\r
  57   }\r
  58 }\r