Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/ModelBinding/ModelValidator.cs

@@ -0,0 +1,71 @@
+namespace System.Web.ModelBinding {
+    using System;
+    using System.Collections.Generic;
+
+    public abstract class ModelValidator {
+        protected ModelValidator(ModelMetadata metadata, ModelBindingExecutionContext modelBindingExecutionContext) {
+            if (metadata == null) {
+                throw new ArgumentNullException("metadata");
+            }
+            if (modelBindingExecutionContext == null) {
+                throw new ArgumentNullException("modelBindingExecutionContext");
+            }
+
+            Metadata = metadata;
+            ModelBindingExecutionContext = modelBindingExecutionContext;
+        }
+
+        protected internal ModelBindingExecutionContext ModelBindingExecutionContext { get; private set; }
+
+        public virtual bool IsRequired {
+            get {
+                return false;
+            }
+        }
+
+        protected internal ModelMetadata Metadata { get; private set; }
+
+#if UNDEF
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate", Justification = "This method may perform non-trivial work.")]
+        public virtual IEnumerable<ModelClientValidationRule> GetClientValidationRules() {
+            return Enumerable.Empty<ModelClientValidationRule>();
+        }
+#endif
+
+        public static ModelValidator GetModelValidator(ModelMetadata metadata, ModelBindingExecutionContext context) {
+            return new CompositeModelValidator(metadata, context);
+        }
+
+        public abstract IEnumerable<ModelValidationResult> Validate(object container);
+
+        private class CompositeModelValidator : ModelValidator {
+            public CompositeModelValidator(ModelMetadata metadata, ModelBindingExecutionContext modelBindingExecutionContext)
+                : base(metadata, modelBindingExecutionContext) {
+            }
+
+            public override IEnumerable<ModelValidationResult> Validate(object container) {
+                bool propertiesValid = true;
+
+                foreach (ModelMetadata propertyMetadata in Metadata.Properties) {
+                    foreach (ModelValidator propertyValidator in propertyMetadata.GetValidators(ModelBindingExecutionContext)) {
+                        foreach (ModelValidationResult propertyResult in propertyValidator.Validate(Metadata.Model)) {
+                            propertiesValid = false;
+                            yield return new ModelValidationResult {
+                                MemberName = ValueProviderUtil.CreateSubPropertyName(propertyMetadata.PropertyName, propertyResult.MemberName),
+                                Message = propertyResult.Message
+                            };
+                        }
+                    }
+                }
+
+                if (propertiesValid) {
+                    foreach (ModelValidator typeValidator in Metadata.GetValidators(ModelBindingExecutionContext)) {
+                        foreach (ModelValidationResult typeResult in typeValidator.Validate(container)) {
+                            yield return typeResult;
+                        }
+                    }
+                }
+            }
+        }
+    }
+}