konform - test.kt

val uuidRegex = "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$".toRegex()

data class Account(
    var accountUUID: String,
    var createdAt: Instant,
    var modifiedAt: Instant,
    var status: AccountStatus
) {
    init {
        Validation<Account> {
            Account::accountUUID {
                pattern(uuidRegex)
            }
            Account::createdAt required { }
            Account::modifiedAt required { }
            Account::status required { }
        }.validateAndThrowOnFailure(this)
    }
}

fun <T> Validation<T>.validateAndThrowOnFailure(value: T) {
    val result = validate(value)
    if (result is Invalid<T>) {
        throw IllegalArgumentException(result.errors.toString())
    }
}