Object reference delegate

src/main/kotlin/nl/astraeus/persistence/reference/Reference.kt

@@ -2,16 +2,20 @@ package nl.astraeus.nl.astraeus.persistence.reference
 
 import nl.astraeus.nl.astraeus.persistence.Persistable
 import nl.astraeus.nl.astraeus.persistence.currentTransaction
+import java.io.Serializable
 import kotlin.reflect.KProperty
 
+inline fun <reified T : Persistable> reference(
+) = Reference(T::class.java)
+
+
 class Reference<S : Persistable>(
-  val cls: Class<S>,
-  val setter: (Long?) -> Unit,
-  val getter: () -> Long?,
-) {
+  val cls: Class<S>
+) : Serializable {
+  var id: Long? = null
 
   operator fun getValue(thisRef: Persistable, property: KProperty<*>): S? {
-    return currentTransaction()?.find(cls.kotlin, (getter() ?: 0L))
+    return currentTransaction()?.find(cls.kotlin, id ?: 0L)
   }
 
   operator fun setValue(thisRef: Persistable, property: KProperty<*>, value: S?) {
@@ -19,7 +23,7 @@ class Reference<S : Persistable>(
       // todo: only store if not already stored?
       currentTransaction()?.store(value)
     }
-    setter(value?.id)
+    id = value?.id
   }
 
   companion object {