mcs/class/System.Web.Mvc/System.Web.Mvc/ReflectedControllerDescriptor.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.Linq;\r
  17     using System.Reflection;\r
  18     using System.Web.Mvc.Resources;\r
  19 \r
  20     public class ReflectedControllerDescriptor : ControllerDescriptor {\r
  21 \r
  22         private ActionDescriptor[] _canonicalActionsCache;\r
  23         private readonly Type _controllerType;\r
  24         private readonly ActionMethodSelector _selector;\r
  25 \r
  26         public ReflectedControllerDescriptor(Type controllerType) {\r
  27             if (controllerType == null) {\r
  28                 throw new ArgumentNullException("controllerType");\r
  29             }\r
  30 \r
  31             _controllerType = controllerType;\r
  32             _selector = new ActionMethodSelector(_controllerType);\r
  33         }\r
  34 \r
  35         public sealed override Type ControllerType {\r
  36             get {\r
  37                 return _controllerType;\r
  38             }\r
  39         }\r
  40 \r
  41         public override ActionDescriptor FindAction(ControllerContext controllerContext, string actionName) {\r
  42             if (controllerContext == null) {\r
  43                 throw new ArgumentNullException("controllerContext");\r
  44             }\r
  45             if (String.IsNullOrEmpty(actionName)) {\r
  46                 throw new ArgumentException(MvcResources.Common_NullOrEmpty, "actionName");\r
  47             }\r
  48 \r
  49             MethodInfo matched = _selector.FindActionMethod(controllerContext, actionName);\r
  50             if (matched == null) {\r
  51                 return null;\r
  52             }\r
  53 \r
  54             return new ReflectedActionDescriptor(matched, actionName, this);\r
  55         }\r
  56 \r
  57         private MethodInfo[] GetAllActionMethodsFromSelector() {\r
  58             List<MethodInfo> allValidMethods = new List<MethodInfo>();\r
  59             allValidMethods.AddRange(_selector.AliasedMethods);\r
  60             allValidMethods.AddRange(_selector.NonAliasedMethods.SelectMany(g => g));\r
  61             return allValidMethods.ToArray();\r
  62         }\r
  63 \r
  64         public override ActionDescriptor[] GetCanonicalActions() {\r
  65             ActionDescriptor[] actions = LazilyFetchCanonicalActionsCollection();\r
  66 \r
  67             // need to clone array so that user modifications aren't accidentally stored\r
  68             return (ActionDescriptor[])actions.Clone();\r
  69         }\r
  70 \r
  71         public override object[] GetCustomAttributes(bool inherit) {\r
  72             return ControllerType.GetCustomAttributes(inherit);\r
  73         }\r
  74 \r
  75         public override object[] GetCustomAttributes(Type attributeType, bool inherit) {\r
  76             return ControllerType.GetCustomAttributes(attributeType, inherit);\r
  77         }\r
  78 \r
  79         public override bool IsDefined(Type attributeType, bool inherit) {\r
  80             return ControllerType.IsDefined(attributeType, inherit);\r
  81         }\r
  82 \r
  83         private ActionDescriptor[] LazilyFetchCanonicalActionsCollection() {\r
  84             return DescriptorUtil.LazilyFetchOrCreateDescriptors<MethodInfo, ActionDescriptor>(\r
  85                 ref _canonicalActionsCache /* cacheLocation */,\r
  86                 GetAllActionMethodsFromSelector /* initializer */,\r
  87                 methodInfo => ReflectedActionDescriptor.TryCreateDescriptor(methodInfo, methodInfo.Name, this) /* converter */);\r
  88         }\r
  89 \r
  90     }\r
  91 }\r