如何执行反射以找到在Scala中扩展基类的所有类？

Question

I have a base class of type DataObject which extends other classes. I would like to find all the classes from my main class such that I don't have to import them by hand. How can I achieve this?

Current implementation (import each class that extends DataObject individually):

...
   val dataObjects: Array[DataObject] = Array(
     new ExtendedDataObject(),
     new SecondExtendedDataObject(),
     .
     .
     .
     new LastExtendedDataObject(),
   )
   dataObjects.par.foreach(_.doSomething())
...

Example of ideal implementation:

...
   def main(args: Array[String]): Unit = {
      val dataObjects: Array[DataObject] = <method to find all classes extended by DataObject>
      dataObjects.par.foreach(_.doSomething())
   }
...

I don't really understand the Scala Reflection Documentation

UPDATE

Using org.reflections , how do I turn dataObjects into Array[DataObject] ?

...
   def main(args: Array[String]): Unit = {
      val reflections = new Reflections("my.package.dataobjects")
      val dataObjects = reflections.getSubTypesOf(classOf[DataObject]).toArray()

   }
...

Answer 1

According to your answers, what you need is:

import scala.collection.JavaConverters._

val reflections = new Reflections("my.package.dataobjects")
val dataObjects = asScalaSet(reflections.getSubTypesOf(classOf[Base])).map(_.newInstance())

That's a mutable set of the instances, if you want to make it inmmutable just:

val immutableDataObjects = dataObjects.toSet