mcs/class/System.Web.Mvc/System.Web.Mvc/ControllerBuilder.cs

   1 /* ****************************************************************************\r
   2  *\r
   3  * Copyright (c) Microsoft Corporation. All rights reserved.\r
   4  *\r
   5  * This software is subject to the Microsoft Public License (Ms-PL). \r
   6  * A copy of the license can be found in the license.htm file included \r
   7  * in this distribution.\r
   8  *\r
   9  * You must not remove this notice, or any other, from this software.\r
  10  *\r
  11  * ***************************************************************************/\r
  12 \r
  13 namespace System.Web.Mvc {\r
  14     using System;\r
  15     using System.Collections.Generic;\r
  16     using System.Diagnostics.CodeAnalysis;\r
  17     using System.Globalization;\r
  18     using System.Web.Mvc.Resources;\r
  19 \r
  20     public class ControllerBuilder {\r
  21 \r
  22         private Func<IControllerFactory> _factoryThunk;\r
  23         private static ControllerBuilder _instance = new ControllerBuilder();\r
  24         private HashSet<string> _namespaces = new HashSet<string>(StringComparer.OrdinalIgnoreCase);\r
  25 \r
  26         public ControllerBuilder() {\r
  27             SetControllerFactory(new DefaultControllerFactory() {\r
  28                 ControllerBuilder = this\r
  29             });\r
  30         }\r
  31 \r
  32         public static ControllerBuilder Current {\r
  33             get {\r
  34                 return _instance;\r
  35             }\r
  36         }\r
  37 \r
  38         public HashSet<string> DefaultNamespaces {\r
  39             get {\r
  40                 return _namespaces;\r
  41             }\r
  42         }\r
  43 \r
  44         [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate",\r
  45             Justification = "Calling method multiple times might return different objects.")]\r
  46         public IControllerFactory GetControllerFactory() {\r
  47             IControllerFactory controllerFactoryInstance = _factoryThunk();\r
  48             return controllerFactoryInstance;\r
  49         }\r
  50 \r
  51         public void SetControllerFactory(IControllerFactory controllerFactory) {\r
  52             if (controllerFactory == null) {\r
  53                 throw new ArgumentNullException("controllerFactory");\r
  54             }\r
  55 \r
  56             _factoryThunk = () => controllerFactory;\r
  57         }\r
  58 \r
  59         public void SetControllerFactory(Type controllerFactoryType) {\r
  60             if (controllerFactoryType == null) {\r
  61                 throw new ArgumentNullException("controllerFactoryType");\r
  62             }\r
  63             if (!typeof(IControllerFactory).IsAssignableFrom(controllerFactoryType)) {\r
  64                 throw new ArgumentException(\r
  65                     String.Format(\r
  66                         CultureInfo.CurrentUICulture,\r
  67                         MvcResources.ControllerBuilder_MissingIControllerFactory,\r
  68                         controllerFactoryType),\r
  69                     "controllerFactoryType");\r
  70             }\r
  71 \r
  72             _factoryThunk = delegate() {\r
  73                 try {\r
  74                     return (IControllerFactory)Activator.CreateInstance(controllerFactoryType);\r
  75                 }\r
  76                 catch (Exception ex) {\r
  77                     throw new InvalidOperationException(\r
  78                         String.Format(\r
  79                             CultureInfo.CurrentUICulture,\r
  80                             MvcResources.ControllerBuilder_ErrorCreatingControllerFactory,\r
  81                             controllerFactoryType),\r
  82                         ex);\r
  83                 }\r
  84             };\r
  85         }\r
  86     }\r
  87 }\r