Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/ModelBinding/ComplexModel.cs

@@ -0,0 +1,43 @@
+namespace System.Web.ModelBinding {
+    using System;
+    using System.Collections.Generic;
+    using System.Collections.ObjectModel;
+    using System.Linq;
+
+    // Describes a complex model, but uses a collection rather than individual properties as the data store.
+    public class ComplexModel {
+
+        public ComplexModel(ModelMetadata modelMetadata, IEnumerable<ModelMetadata> propertyMetadata) {
+            if (modelMetadata == null) {
+                throw new ArgumentNullException("modelMetadata");
+            }
+            if (propertyMetadata == null) {
+                throw new ArgumentNullException("propertyMetadata");
+            }
+
+            ModelMetadata = modelMetadata;
+            PropertyMetadata = new ReadOnlyCollection<ModelMetadata>(propertyMetadata.ToList());
+            Results = new Dictionary<ModelMetadata, ComplexModelResult>();
+        }
+
+        public ModelMetadata ModelMetadata {
+            get;
+            private set;
+        }
+
+        public ReadOnlyCollection<ModelMetadata> PropertyMetadata {
+            get;
+            private set;
+        }
+
+        // Contains entries corresponding to each property against which binding was
+        // attempted. If binding failed, the entry's value will be null. If binding
+        // was never attempted, this dictionary will not contain a corresponding
+        // entry.
+        public IDictionary<ModelMetadata, ComplexModelResult> Results {
+            get;
+            private set;
+        }
+
+    }
+}