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namespace System.Web.ModelBinding {
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
public abstract class AssociatedValidatorProvider : ModelValidatorProvider {
protected virtual ICustomTypeDescriptor GetTypeDescriptor(Type type) {
return TypeDescriptorHelper.Get(type);
}
public override sealed IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ModelBindingExecutionContext context) {
if (metadata == null) {
throw new ArgumentNullException("metadata");
}
if (context == null) {
throw new ArgumentNullException("context");
}
if (metadata.ContainerType != null && !String.IsNullOrEmpty(metadata.PropertyName)) {
return GetValidatorsForProperty(metadata, context);
}
return GetValidatorsForType(metadata, context);
}
protected abstract IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ModelBindingExecutionContext context, IEnumerable<Attribute> attributes);
private IEnumerable<ModelValidator> GetValidatorsForProperty(ModelMetadata metadata, ModelBindingExecutionContext context) {
ICustomTypeDescriptor typeDescriptor = GetTypeDescriptor(metadata.ContainerType);
PropertyDescriptor property = typeDescriptor.GetProperties().Find(metadata.PropertyName, true);
if (property == null) {
throw new ArgumentException(
String.Format(
CultureInfo.CurrentCulture,
SR.GetString(SR.Common_PropertyNotFound),
metadata.ContainerType.FullName, metadata.PropertyName),
"metadata");
}
return GetValidators(metadata, context, property.Attributes.OfType<Attribute>());
}
private IEnumerable<ModelValidator> GetValidatorsForType(ModelMetadata metadata, ModelBindingExecutionContext context) {
return GetValidators(metadata, context, GetTypeDescriptor(metadata.ModelType).GetAttributes().Cast<Attribute>());
}
}
}
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