reflection을 이용한 공통코드 조회

CodesExt.kt

object Codes {
    // ... other codes ...
    enum class SettlementType(val label: String, val value: String) {
        AUTO("자동", "STLTP_AUTO"),

        MANUAL("수동", "STLTP_MANUAL");

        companion object {
            fun getByValue(value: String): SettlementType? = values().find { it.value == value }
        }
    }
    // ... other codes ...
}

data class Code(
    val id: Int,
    val group: String,
    val name: String,
    val label: String
)

fun Codes.getCodes(groups: List<String>): Any {
    val codeNames = groups.map { CaseFormat.UPPER_UNDERSCORE.to(CaseFormat.UPPER_CAMEL, it) }
    val data = mutableMapOf<String, List<Code>>()
    this::class.nestedClasses.filter { codeNames.contains(it.simpleName) }
        .forEach { codes ->
            val groupUpperCamel = codeNames.first { it == codes.simpleName }
            val groupUpperUnderscore = CaseFormat.UPPER_CAMEL.to(CaseFormat.UPPER_UNDERSCORE, groupUpperCamel)
            val groupLowerCamel = CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_CAMEL, groupUpperCamel)
            val children = codes.java.getDeclaredMethod("values").invoke(null) as Array<*>
            val list = children.mapIndexedNotNull { index, child ->
                if (child != null) {
                    val label = child::class.declaredMemberProperties.find { it.name == "label" }?.getter?.call(child) as String
                    val value = child::class.declaredMemberProperties.find { it.name == "value" }?.getter?.call(child) as String
                    Code(index, groupUpperUnderscore, value, label)
                } else {
                    null
                }
            }
            data[groupLowerCamel] = list
        }
    return data
}