デシリアライザー取得を外だし

Author: k163377

src/main/kotlin/com/mapk/krowmapper/ParameterForMap.kt

@@ -24,15 +24,7 @@ class ParameterForMap private constructor(
     private val deserializer: KFunction<*>?
 
     init {
-        val deserializers = deserializerFromConstructors(kClazz) +
-                deserializerFromStaticMethods(kClazz) +
-                deserializerFromCompanionObject(kClazz)
-
-        deserializer = when {
-            deserializers.isEmpty() -> null
-            deserializers.size == 1 -> deserializers.single()
-            else -> throw IllegalArgumentException("Find multiple deserializer from ${kClazz.jvmName}")
-        }
+        deserializer = kClazz.getDeserializer()
     }
 
     fun getObject(rs: ResultSet): Any? = when {
@@ -54,6 +46,18 @@ class ParameterForMap private constructor(
     }
 }
 
+private fun <T : Any> KClass<T>.getDeserializer(): KFunction<T>? {
+    val deserializers = deserializerFromConstructors(this) +
+            deserializerFromStaticMethods(this) +
+            deserializerFromCompanionObject(this)
+
+    return when {
+        deserializers.isEmpty() -> null
+        deserializers.size == 1 -> deserializers.single()
+        else -> throw IllegalArgumentException("Find multiple deserializer from $jvmName")
+    }
+}
+
 private fun <T> Collection<KFunction<T>>.getDeserializerFromFunctions(): Collection<KFunction<T>> {
     return filter { it.annotations.any { annotation -> annotation is KColumnDeserializer } }
         .map { func ->