/// <summary>
/// Gets the collection of registered <see cref="ModelValidator"/> instances.
/// </summary>
/// <param name="actionContext">The context.</param>
/// <param name="metadata">The metadata.</param>
/// <returns>A collection of registered <see cref="ModelValidator"/> instances.</returns>
public static IEnumerable <ModelValidator> GetValidators(this HttpActionContext actionContext, ModelMetadata metadata)
{
if (actionContext == null)
{
throw Error.ArgumentNull("actionContext");
}
IModelValidatorCache validatorCache = actionContext.GetValidatorCache();
return(actionContext.GetValidators(metadata, validatorCache));
}
/// <summary>
/// Determines whether the <paramref name="model"/> is valid and adds any validation errors to the <paramref name="actionContext"/>'s <see cref="ModelStateDictionary"/>
/// </summary>
/// <param name="model">The model to be validated.</param>
/// <param name="type">The <see cref="Type"/> to use for validation.</param>
/// <param name="metadataProvider">The <see cref="ModelMetadataProvider"/> used to provide the model metadata.</param>
/// <param name="actionContext">The <see cref="HttpActionContext"/> within which the model is being validated.</param>
/// <param name="keyPrefix">The <see cref="string"/> to append to the key for any validation errors.</param>
/// <returns><c>true</c>if <paramref name="model"/> is valid, <c>false</c> otherwise.</returns>
public bool Validate(object model, Type type, ModelMetadataProvider metadataProvider, HttpActionContext actionContext, string keyPrefix)
{
if (type == null)
{
throw Error.ArgumentNull("type");
}
if (metadataProvider == null)
{
throw Error.ArgumentNull("metadataProvider");
}
if (actionContext == null)
{
throw Error.ArgumentNull("actionContext");
}
if (model != null && MediaTypeFormatterCollection.IsTypeExcludedFromValidation(model.GetType()))
{
// no validation for some DOM like types
return true;
}
ModelValidatorProvider[] validatorProviders = actionContext.GetValidatorProviders().ToArray();
// Optimization : avoid validating the object graph if there are no validator providers
if (validatorProviders == null || validatorProviders.Length == 0)
{
return true;
}
ModelMetadata metadata = metadataProvider.GetMetadataForType(() => model, type);
ValidationContext validationContext = new ValidationContext()
{
MetadataProvider = metadataProvider,
ActionContext = actionContext,
ValidatorCache = actionContext.GetValidatorCache(),
ModelState = actionContext.ModelState,
Visited = new HashSet<object>(),
KeyBuilders = new Stack<IKeyBuilder>(),
RootPrefix = keyPrefix
};
return ValidateNodeAndChildren(metadata, validationContext, container: null);
}