android - 是否可以将变量传递给枚举？

Question

我有一个使用“ValidationRequirements”数据类验证字符串的类，如果无效则返回 Enum 错误消息。根据传递的要求类型，枚举应调整字符串以匹配它。

验证要求:

data class ValidationRequirements(
        //--------CONFIG_REQUIREMENTS--------
        val PREFIX_STRING: String,
        val REQUIRED_LENGTH: Int,
        val MAXIMUM_LENGTH: Int,
        val REQUIRE_SPECIAL_CHARACTERS: Boolean,
        val REQUIRE_DIGITS: Boolean,
        val REQUIRE_LOWER_CASE: Boolean,
        val REQUIRE_UPPER_CASE: Boolean,
        val REQUIRE_SPACE_SEPARATION: Boolean
)

枚举:

enum class StringStrengthReport(private val errorMessage: String) {
            INVALID_EMAIL_FORMAT("Invalid email format\n"),
            TO_SHORT(" requires at least 6 characters\n"),
            LOWER_CASE_REQUIRED(" requires at least one lower case character\n"),
            UPPER_CASE_REQUIRED(" requires at least one upper case character\n"),
            DIGIT_REQUIRED(" requires at least one numeric character\n"),
            SPECIAL_CHARACTER_REQUIRED(" requires at least one special character (i.e !&?#%)\n"),
            MAX_LENGTH_EXCEEDED(" max length is 32 characters\n"),
            NULL_STRING(TO_SHORT.errorMessage),
            VALID(" is valid!\n");
}

是否可以通过更改不同类型字符串的最小/最大长度的要求？

Answer 1

改用密封类:

sealed class StringStrengthReport(private val message: String) {
    override fun toString() = message
}
class InvalidEmailFormat(): StringStrengthReport("Invalid email format") 
class TooShort(val minLength: Int): StringStrengthReport("Requires at least $minLength characters")

结果:

println(InvalidEmailFormat()) // Invalid email format
println(TooShort(7)) // Requires at least 7 characters