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

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