1 files changed, 196 insertions, 0 deletions
diff --git a/src/System.Web.Mvc/ActionDescriptor.cs b/src/System.Web.Mvc/ActionDescriptor.cs
new file mode 100644
index 00000000..7175bdc4
--- /dev/null
+++ b/src/System.Web.Mvc/ActionDescriptor.cs
@@ -0,0 +1,196 @@
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.Linq;
+using System.Reflection;
+using System.Web.Mvc.Properties;
+
+namespace System.Web.Mvc
+{
+    public abstract class ActionDescriptor : ICustomAttributeProvider, IUniquelyIdentifiable
+    {
+        private static readonly ActionMethodDispatcherCache _staticDispatcherCache = new ActionMethodDispatcherCache();
+
+        private static readonly ActionSelector[] _emptySelectors = new ActionSelector[0];
+        private readonly Lazy<string> _uniqueId;
+        private ActionMethodDispatcherCache _instanceDispatcherCache;
+
+        protected ActionDescriptor()
+        {
+            _uniqueId = new Lazy<string>(CreateUniqueId);
+        }
+
+        public abstract string ActionName { get; }
+
+        public abstract ControllerDescriptor ControllerDescriptor { get; }
+
+        internal ActionMethodDispatcherCache DispatcherCache
+        {
+            get
+            {
+                if (_instanceDispatcherCache == null)
+                {
+                    _instanceDispatcherCache = _staticDispatcherCache;
+                }
+                return _instanceDispatcherCache;
+            }
+            set { _instanceDispatcherCache = value; }
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2119:SealMethodsThatSatisfyPrivateInterfaces", Justification = "This is overridden elsewhere in System.Web.Mvc")]
+        public virtual string UniqueId
+        {
+            get { return _uniqueId.Value; }
+        }
+
+        private string CreateUniqueId()
+        {
+            return DescriptorUtil.CreateUniqueId(GetType(), ControllerDescriptor, ActionName);
+        }
+
+        public abstract object Execute(ControllerContext controllerContext, IDictionary<string, object> parameters);
+
+        internal static object ExtractParameterFromDictionary(ParameterInfo parameterInfo, IDictionary<string, object> parameters, MethodInfo methodInfo)
+        {
+            object value;
+
+            if (!parameters.TryGetValue(parameterInfo.Name, out value))
+            {
+                // the key should always be present, even if the parameter value is null
+                string message = String.Format(CultureInfo.CurrentCulture, MvcResources.ReflectedActionDescriptor_ParameterNotInDictionary,
+                                               parameterInfo.Name, parameterInfo.ParameterType, methodInfo, methodInfo.DeclaringType);
+                throw new ArgumentException(message, "parameters");
+            }
+
+            if (value == null && !TypeHelpers.TypeAllowsNullValue(parameterInfo.ParameterType))
+            {
+                // tried to pass a null value for a non-nullable parameter type
+                string message = String.Format(CultureInfo.CurrentCulture, MvcResources.ReflectedActionDescriptor_ParameterCannotBeNull,
+                                               parameterInfo.Name, parameterInfo.ParameterType, methodInfo, methodInfo.DeclaringType);
+                throw new ArgumentException(message, "parameters");
+            }
+
+            if (value != null && !parameterInfo.ParameterType.IsInstanceOfType(value))
+            {
+                // value was supplied but is not of the proper type
+                string message = String.Format(CultureInfo.CurrentCulture, MvcResources.ReflectedActionDescriptor_ParameterValueHasWrongType,
+                                               parameterInfo.Name, methodInfo, methodInfo.DeclaringType, value.GetType(), parameterInfo.ParameterType);
+                throw new ArgumentException(message, "parameters");
+            }
+
+            return value;
+        }
+
+        internal static object ExtractParameterOrDefaultFromDictionary(ParameterInfo parameterInfo, IDictionary<string, object> parameters)
+        {
+            Type parameterType = parameterInfo.ParameterType;
+
+            object value;
+            parameters.TryGetValue(parameterInfo.Name, out value);
+
+            // if wrong type, replace with default instance
+            if (parameterType.IsInstanceOfType(value))
+            {
+                return value;
+            }
+            else
+            {
+                object defaultValue;
+                if (ParameterInfoUtil.TryGetDefaultValue(parameterInfo, out defaultValue))
+                {
+                    return defaultValue;
+                }
+                else
+                {
+                    return TypeHelpers.GetDefaultValue(parameterType);
+                }
+            }
+        }
+
+        public virtual object[] GetCustomAttributes(bool inherit)
+        {
+            return GetCustomAttributes(typeof(object), inherit);
+        }
+
+        public virtual object[] GetCustomAttributes(Type attributeType, bool inherit)
+        {
+            if (attributeType == null)
+            {
+                throw new ArgumentNullException("attributeType");
+            }
+
+            return (object[])Array.CreateInstance(attributeType, 0);
+        }
+
+        public virtual IEnumerable<FilterAttribute> GetFilterAttributes(bool useCache)
+        {
+            return GetCustomAttributes(typeof(FilterAttribute), inherit: true).Cast<FilterAttribute>();
+        }
+
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [Obsolete("Please call System.Web.Mvc.FilterProviders.Providers.GetFilters() now.", true)]
+        public virtual FilterInfo GetFilters()
+        {
+            return new FilterInfo();
+        }
+
+        public abstract ParameterDescriptor[] GetParameters();
+
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate", Justification = "This method may perform non-trivial work.")]
+        public virtual ICollection<ActionSelector> GetSelectors()
+        {
+            return _emptySelectors;
+        }
+
+        public virtual bool IsDefined(Type attributeType, bool inherit)
+        {
+            if (attributeType == null)
+            {
+                throw new ArgumentNullException("attributeType");
+            }
+
+            return false;
+        }
+
+        internal static string VerifyActionMethodIsCallable(MethodInfo methodInfo)
+        {
+            // we can't call static methods
+            if (methodInfo.IsStatic)
+            {
+                return String.Format(CultureInfo.CurrentCulture,
+                                     MvcResources.ReflectedActionDescriptor_CannotCallStaticMethod,
+                                     methodInfo,
+                                     methodInfo.ReflectedType.FullName);
+            }
+
+            // we can't call instance methods where the 'this' parameter is a type other than ControllerBase
+            if (!typeof(ControllerBase).IsAssignableFrom(methodInfo.ReflectedType))
+            {
+                return String.Format(CultureInfo.CurrentCulture, MvcResources.ReflectedActionDescriptor_CannotCallInstanceMethodOnNonControllerType,
+                                     methodInfo, methodInfo.ReflectedType.FullName);
+            }
+
+            // we can't call methods with open generic type parameters
+            if (methodInfo.ContainsGenericParameters)
+            {
+                return String.Format(CultureInfo.CurrentCulture, MvcResources.ReflectedActionDescriptor_CannotCallOpenGenericMethods,
+                                     methodInfo, methodInfo.ReflectedType.FullName);
+            }
+
+            // we can't call methods with ref/out parameters
+            ParameterInfo[] parameterInfos = methodInfo.GetParameters();
+            foreach (ParameterInfo parameterInfo in parameterInfos)
+            {
+                if (parameterInfo.IsOut || parameterInfo.ParameterType.IsByRef)
+                {
+                    return String.Format(CultureInfo.CurrentCulture, MvcResources.ReflectedActionDescriptor_CannotCallMethodsWithOutOrRefParameters,
+                                         methodInfo, methodInfo.ReflectedType.FullName, parameterInfo);
+                }
+            }
+
+            // we can call this method
+            return null;
+        }
+    }
+}