protected override VerifyResult VerifyOneImpl(VerifiableMemberContext context)
{
if (context is null)
{
return(_options.ReturnNullReferenceOrSuccess());
}
// 如果 Value 为 String，对其进行验证
if (context.Value is string str)
{
var attr = context.GetAttributes <LengthShould16Attribute>().FirstOrDefault();
if (attr is null)
{
return(VerifyResult.NullReferenceWith("There's no LengthShould16Attribute on this Member."));
}
if (str.Length == 16)
{
return(VerifyResult.Success);
}
return(new VerifyResult(new VerifyFailure(context.MemberName, "Length should 16.", str)));
}
// 否则，如果 Value 不是基础类型（即 Value 为引用类型、结构等），对其进一步解析并验证
if (!context.BasicTypeState())
{
return(VerifyImpl(context.ConvertToObjectContext()));
}
// 否则，认为其类型不是所期待的
return(VerifyResult.UnexpectedTypeWith(context.MemberName));
}
public static VerifyResult ReturnNullReferenceOrSuccess(this ValidationOptions options, string paramName)
{
if (options is null)
{
return(VerifyResult.Success);
}
return(options.FailureIfInstanceIsNull ? VerifyResult.NullReferenceWith(paramName) : VerifyResult.Success);
}