Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/aspnetwebstack/src/System.Web.Mvc/ValidatableObjectAdapter.cs

@@ -0,0 +1,65 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Globalization;
+using System.Linq;
+using System.Web.Mvc.Properties;
+
+namespace System.Web.Mvc
+{
+    public class ValidatableObjectAdapter : ModelValidator
+    {
+        public ValidatableObjectAdapter(ModelMetadata metadata, ControllerContext context)
+            : base(metadata, context)
+        {
+        }
+
+        public override IEnumerable<ModelValidationResult> Validate(object container)
+        {
+            // NOTE: Container is never used here, because IValidatableObject doesn't give you
+            // any way to get access to your container.
+
+            object model = Metadata.Model;
+            if (model == null)
+            {
+                return Enumerable.Empty<ModelValidationResult>();
+            }
+
+            IValidatableObject validatable = model as IValidatableObject;
+            if (validatable == null)
+            {
+                throw new InvalidOperationException(
+                    String.Format(
+                        CultureInfo.CurrentCulture,
+                        MvcResources.ValidatableObjectAdapter_IncompatibleType,
+                        typeof(IValidatableObject).FullName,
+                        model.GetType().FullName));
+            }
+
+            ValidationContext validationContext = new ValidationContext(validatable, null, null);
+            return ConvertResults(validatable.Validate(validationContext));
+        }
+
+        private IEnumerable<ModelValidationResult> ConvertResults(IEnumerable<ValidationResult> results)
+        {
+            foreach (ValidationResult result in results)
+            {
+                if (result != ValidationResult.Success)
+                {
+                    if (result.MemberNames == null || !result.MemberNames.Any())
+                    {
+                        yield return new ModelValidationResult { Message = result.ErrorMessage };
+                    }
+                    else
+                    {
+                        foreach (string memberName in result.MemberNames)
+                        {
+                            yield return new ModelValidationResult { Message = result.ErrorMessage, MemberName = memberName };
+                        }
+                    }
+                }
+            }
+        }
+    }
+}