How to find is a lateinit var has been initialized via Reflection?

Question

I want to find out via reflection if lateinit property of an object has been initialized. How do I got about doing that?

Getting the property and checking non-null results in UninitializedPropertyAccessException

fun Any.isAnyEntityInitialized () {
    val clazz = this.javaClass.kotlin
    val filteredEntities = clazz.declaredMemberProperties.filter {
        it.isLateinit && getDelegate(this) != null
    }
}

Answer 1

This works for me:

import kotlin.reflect.full.declaredMemberProperties
import kotlin.reflect.jvm.javaField

class Test {
    lateinit var s: String
}

fun Any.isAnyEntityInitialized(): Boolean =
    this::class.declaredMemberProperties.any { property ->
        property.isLateinit && property.javaField?.get(this) != null
    }

fun main() {
    val test = Test()
    println(test.isAnyEntityInitialized()) // prints false
    test.s = "test"
    println(test.isAnyEntityInitialized()) // prints true
}