Fix currentTransaction in references while using query

src/test/kotlin/nl/astraeus/persistence/TestPersistenceJavaInKotlin.kt

@@ -0,0 +1,67 @@
+package nl.astraeus.persistence
+
+import nl.astraeus.nl.astraeus.persistence.Index
+import nl.astraeus.nl.astraeus.persistence.Persistable
+import nl.astraeus.nl.astraeus.persistence.Persistent
+import org.junit.jupiter.api.Test
+import java.io.File
+
+
+class TestPersistenceJavaInKotlin {
+  internal class Person(
+    var name: String,
+    var age: Int
+  ) : Persistable {
+    override var id: Long = 0
+    override var version: Long = 0
+
+    companion object {
+      private const val serialVersionUID = 1L
+    }
+  }
+
+  @Test
+  fun testPersistence() {
+    println("TestPersistenceJavaInKotlin.testPersistence")
+
+    val persistent = Persistent(
+      File("data", "java-kotlin-test"),
+      arrayOf(
+        Index(
+          Person::class,
+          "name"
+        ) { p -> (p as Person).name }
+      ),
+      false
+    )
+
+    persistent.transaction {
+      val person = find(Person::class.java, 1L)
+      if (person != null) {
+        println("Person: ${person.name} is ${person.age} years old."
+        )
+      }
+    }
+
+    persistent.transaction {
+      val person = Person("John Doe", 42)
+
+      store(person)
+    }
+
+    persistent.query {
+      val persons = findByIndex(
+        Person::class.java,
+        "name",
+        "John Doe"
+      )
+      for (person in persons) {
+        println("Person: ${person.name}  is ${person.age} years old.")
+      }
+    }
+
+    persistent.snapshot()
+    persistent.datastore.printStatus()
+    persistent.removeOldFiles()
+  }
+}