PHP7 FactoryMethod

Creational/FactoryMethod/GermanFactory.php

@@ -2,28 +2,19 @@
 
 namespace DesignPatterns\Creational\FactoryMethod;
 
-/**
- * GermanFactory is a vehicle factory in Germany.
- */
 class GermanFactory extends FactoryMethod
 {
-    /**
-     * {@inheritdoc}
-     */
-    protected function createVehicle($type)
+    protected function createVehicle(string $type): VehicleInterface
     {
         switch ($type) {
             case parent::CHEAP:
                 return new Bicycle();
-                break;
             case parent::FAST:
-                $obj = new Porsche();
-                // we can specialize the way we want some concrete Vehicle since
-                // we know the class
-                $obj->addTuningAMG();
+                $carMercedes = new CarMercedes();
+                // we can specialize the way we want some concrete Vehicle since we know the class
+                $carMercedes->addAMGTuning();
 
-                return $obj;
-                break;
+                return $carMercedes;
             default:
                 throw new \InvalidArgumentException("$type is not a valid vehicle");
         }