refactor: AttributeConverter 추상화

woowacourse · Jun 14, 2024 · d1a727f · d1a727f
1 parent bede24b
commit d1a727f
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Showing 2 changed files with 12 additions and 25 deletions.
diff --git a/src/main/kotlin/support/domain/StringToListConverter.kt b/src/main/kotlin/support/domain/StringToListConverter.kt
@@ -2,18 +2,24 @@ package support.domain
 
 import javax.persistence.AttributeConverter
 import javax.persistence.Converter
+import kotlin.reflect.KClass
+import kotlin.reflect.safeCast
 
-@Converter
-class StringToListConverter : AttributeConverter<List<String>, String> {
-    override fun convertToDatabaseColumn(recipients: List<String>): String {
-        return recipients.joinToString(COMMA)
+abstract class StringToListConverter<T : Any>(
+    private val type: KClass<T>,
+) : AttributeConverter<List<T>, String> {
+    override fun convertToDatabaseColumn(attribute: List<T>): String {
+        return attribute.joinToString(COMMA)
     }
 
-    override fun convertToEntityAttribute(dbData: String): List<String> {
-        return dbData.split(COMMA)
+    override fun convertToEntityAttribute(dbData: String): List<T> {
+        return dbData.split(COMMA).mapNotNull { type.safeCast(it) }
     }
 
     companion object {
         private const val COMMA: String = ","
     }
 }
+
+@Converter
+class StringToLongListConverter : StringToListConverter<Long>(Long::class)
diff --git a/src/main/kotlin/support/domain/StringToLongListConverter.kt b/src/main/kotlin/support/domain/StringToLongListConverter.kt