private static IValidationService GetValidationService(ValidationContext validationContext)
{
var service = ((IValidationService)validationContext.GetService(typeof(IValidationService)));
if (service == null)
{
service = Factories.BuildValidationService();
}
return(service);
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (value != null)
{
var results = new HashSet <ValidationResult>();
var service = GetValidationService(validationContext);
var context = Factories.BuildValidationContext(value);
Validator.TryValidateObject(value, context, results, true);
if (results.Count != 0)
{
var memberName = validationContext.MemberName;
return(ResultFromInnerResults(from result in results.Flatten(result => result as IEnumerable <ValidationResult>, leafNodesOnly: true)
select Tuple.Create(memberName, result), memberName));
}
}
return(ValidationResult.Success);
}
public IEnumerable <ValidationResult> PartialValidate <T>(T target, params Expression <Func <T, object> >[] validationExpressions)
{
var validationContext = Factories.BuildValidationContext(target);
var validations = new List <ValidationResult>();
foreach (var validationExpression in validationExpressions)
{
Func <IEnumerable <ValidationResult> > validate;
object value = TryGetValue(validationExpression.CachedCompile <Func <T, object> >(), target);
var unwrappedExpression = validationExpression.RemoveLambdaBody().RemoveCast();
string messagePrefix;
string memberPrefix;
MemberExpression property;
MemberInfo[] propertyChain;
if (unwrappedExpression is MemberExpression)
{
property = (unwrappedExpression as MemberExpression);
propertyChain = CompositeValidationAttribute.UnrollPropertyChain(property).ToArray();
messagePrefix = CompositeValidationAttribute.GetPrefix(propertyChain.Take(propertyChain.Length - 1));
memberPrefix = "";
validate = () =>
{
var name = CompositeValidationAttribute.GetPathedName(propertyChain);
var attrs = property.Member.GetCustomAttributes(true).OfType <ValidationAttribute>();
validationContext.MemberName = name;
var innerValidations = new HashSet <ValidationResult>();
Validator.TryValidateValue(value, validationContext, innerValidations, attrs);
return(innerValidations);
};
}
else if (unwrappedExpression is MethodCallExpression)
{
Func <IValidationService, IEnumerable <ValidationResult> > delegatedValidation = (Func <IValidationService, IEnumerable <ValidationResult> >)value;
var exp = (unwrappedExpression as MethodCallExpression);
property = (exp.Object ?? exp.Arguments[0]) as MemberExpression;
propertyChain = CompositeValidationAttribute.UnrollPropertyChain(property).ToArray();
messagePrefix = CompositeValidationAttribute.GetPrefix(propertyChain);
memberPrefix = CompositeValidationAttribute.GetPathedName(propertyChain);
var attrs = property.Member.GetCustomAttributes(true).OfType <RequiredAttribute>().FirstOrDefault();
validate = () =>
{
var result = delegatedValidation(this);
if (result != null)
{
return(result);
}
if (attrs == null)
{
return(Enumerable.Empty <ValidationResult>());
}
messagePrefix = "";
memberPrefix = "";
return(Enumerable.Repeat(new ValidationResult(attrs.ErrorMessage, new[] { CompositeValidationAttribute.GetPathedName(propertyChain) }), 1));
};
}
else if (unwrappedExpression == (validationExpression as LambdaExpression).Parameters[0])
{
validations.AddRange(CompleteValidate(value));
continue;
}
else
{
throw new NotSupportedException("Unsupported validation expression: " + validationExpression.ToString());
}
validations.AddRange(from v in validate().Flatten(v => v as IEnumerable <ValidationResult>, leafNodesOnly: true)
select new ValidationResult(v.ErrorMessage.Prefix(messagePrefix), v.MemberNames.Select(n => n.Prefix(memberPrefix)).ToArray()));
}
return(validations.Flatten(result => result as IEnumerable <ValidationResult>, leafNodesOnly: true));
}
