Any idea for abstraction CaptchaType? I do it this way because the annotation parameter only receive const value( compile-time constant )

Are you asking for an advice on how to model a common type for PhoneCaptchaType and ImgCaptchaType?

Yeah, or other elegant ways

depending on what you want to achieve, you could get away with this for example:

abstract class CaptchaType {
    open val allowableValues = ""
    val allowableValueList: List<String>
        get() = allowableValues.split(",")
}

object PhoneCaptchaType : CaptchaType() {
    const val MERCHANT_LOGIN = "PHONE_CAPTCHA_MERCHANT_LOGIN"
    const val ADMIN_FORGET_PASS = "PHONE_CAPTCHA_ADMIN_FORGET_PASS"
    override val allowableValues = "$MERCHANT_LOGIN,$ADMIN_FORGET_PASS"
}

no, allowableValuees isn't compile constant and can't used as annotation parameter

okay got it, can’t think of an alternative right now sorry

I also think so, thanks

Maybe you could drop the List property and just use

ImgCaptchaType.allowableValues.contains(scope)

in the controller

yeah, got it

you mean that

contains(scope)

will pass for any string value?

yeah, I change it back