public static ValidationValueContext RequireNotNull(this ValidationValueContext valueContext)
{
if (valueContext.Value == null)
{
throw new ArgumentNullException(string.Format("[{0}] has to be not NULL.", valueContext.ValueName));
}
return(valueContext);
}
public static ValidationValueContext RequireType <TValueType>(this ValidationValueContext valueContext)
{
if (!(valueContext.Value is TValueType))
{
throw new InvalidCastException(string.Format("[{0}] has to be instance of type [{1}]. Current type is: [{2}]",
valueContext.ValueName,
typeof(TValueType),
valueContext.Value == null ? null : valueContext.Value.GetType()));
}
return(valueContext);
}
public static TResult WithAssertAndCast <TResult>(this object value, string valueName, Action <ValidationValueContext> validation)
{
var resultValue = WithAssert(value, valueName, validation);
// double validation to make sure cast will be ok
var valueContext = new ValidationValueContext
{
Value = resultValue,
ValueName = valueName
};
return((TResult)(RequireType <TResult>(valueContext).Value));
}
public static ValidationValueContext RequireStringNotOrEmpty(this ValidationValueContext valueContext)
{
if (!(valueContext.Value is string))
{
throw new ArgumentNullException(string.Format("[{0}] has to be string.", valueContext.ValueName));
}
if (valueContext.Value == null || string.IsNullOrEmpty(valueContext.Value.ToString()))
{
throw new ArgumentNullException(string.Format("[{0}] has to be not NULL or Empty.", valueContext.ValueName));
}
return(valueContext);
}
public static object WithAssert(this object value, string valueName, Action <ValidationValueContext> validation)
{
if (string.IsNullOrEmpty(valueName))
{
throw new ArgumentException("valueName");
}
if (validation == null)
{
throw new ArgumentException("validation");
}
var valueContext = new ValidationValueContext
{
Value = value,
ValueName = valueName
};
validation(valueContext);
return(value);
}
