task 2

src/ch/hevs/isc/slopify_v2/DataBase.scala

@@ -2,8 +2,11 @@ package ch.hevs.isc.slopify_v2
 
 import scala.collection.mutable.ArrayBuffer
 
-class DataBase {
-  private var artists: ArrayBuffer[Artist] = new ArrayBuffer()
-  def addArtist(artist: Artist): Unit = artists.addOne(artist)
-  def containsArtist(artist: Artist): Boolean = artists.contains(artist)
+class DataBase extends Serializable {
+  private var _artists: ArrayBuffer[Artist] = new ArrayBuffer()
+  def addArtist(artist: Artist): Unit = _artists.addOne(artist)
+  def containsArtist(artist: Artist): Boolean = _artists.contains(artist)
+  def getArtists(): Array[Artist] = _artists.toArray
+
+  override def toString: String = s"<Database: ${_artists.length} artist(s)>"
 }