#464 Accessing enum field in Entity created using EntityClass.new cau…

…ses ClassCastException

src/main/kotlin/org/jetbrains/exposed/sql/Table.kt

@@ -11,6 +11,7 @@ import java.util.*
 import kotlin.reflect.KClass
 import kotlin.reflect.KMutableProperty1
 import kotlin.reflect.KProperty1
+import kotlin.reflect.full.isSubclassOf
 import kotlin.reflect.full.memberProperties
 import kotlin.reflect.full.primaryConstructor
 
@@ -236,10 +237,11 @@ open class Table(name: String = ""): ColumnSet(), DdlAware {
      */
     fun <T:Enum<T>> enumerationByName(name: String, length: Int, klass: KClass<T>): Column<T> = registerColumn(name, EnumerationNameColumnType(klass, length))
 
+    @Suppress("UNCHECKED_CAST")
     fun <T:Enum<T>> customEnumeration(name: String, sql: String? = null, fromDb: (Any) -> T, toDb: (T) -> Any) =
         registerColumn<T>(name, object : ColumnType() {
             override fun sqlType(): String = sql ?: error("Column $name should exists in database ")
-            override fun valueFromDB(value: Any) = fromDb(value)
+            override fun valueFromDB(value: Any) = if (value::class.isSubclassOf(Enum::class)) value as T else fromDb(value)
             override fun notNullValueToDB(value: Any) = toDb(value as T)
         })
 

src/test/kotlin/org/jetbrains/exposed/sql/tests/shared/DDLTests.kt

@@ -681,7 +681,9 @@ class DDLTests : DatabaseTestsBase() {
                 val entity = EnumClass.new {
                     enum = Foo.Baz
                 }
-
+                assertEquals(Foo.Baz, entity.enum)
+                entity.id.value // flush entity
+                assertEquals(Foo.Baz, entity.enum)
                 assertEquals(Foo.Baz, EnumClass.reload(entity)!!.enum)
             } finally {
                 try {