import java.util.Optional

/**
 * Implicit conversions between Scala Option and Java 8 Optional.
 */
object JavaOptionals {

  /**
   * Transform a Scala Option[T] to a Java Optional[T]
   */
  implicit def toRichOption[T](opt: Option[T]): RichOption[T] = new RichOption[T](opt)

  /**
   * Transform a Java Optional[T] to a Scala Option[T]
   */
  implicit def toRichOptional[T](optional: Optional[T]): RichOptional[T] = new RichOptional[T](optional)
}

class RichOption[T] (opt: Option[T]) {

  def toOptional: Optional[T] = Optional.ofNullable(opt.getOrElse(null).asInstanceOf[T])
}

class RichOptional[T] (opt: Optional[T]) {

  def toOption: Option[T] = if (opt.isPresent) Some(opt.get()) else None
}