Bundle Implementation

public class VikingService implements IVikingService {

    ArrayList<IGameEntity> vikings;

    /**
     * Default implementation loads 4 vikings of each type into list
     */
    public VikingService() {
        vikings = new ArrayList<IGameEntity>();

        vikings.add(new Viking(100, 100, IGameEntity.Type.VIKING));
        vikings.add(new Viking(100, 200, IGameEntity.Type.VIKING));
        vikings.add(new Viking(100, 520, IGameEntity.Type.VIKING));
        vikings.add(new Viking(100, 620, IGameEntity.Type.VIKING));

        vikings.add(new Viking(1000, 100, IGameEntity.Type.ENEMY_VIKING));
        vikings.add(new Viking(1000, 200, IGameEntity.Type.ENEMY_VIKING));
        vikings.add(new Viking(1000, 520, IGameEntity.Type.ENEMY_VIKING));
        vikings.add(new Viking(1000, 620, IGameEntity.Type.ENEMY_VIKING));

    }

    //@todo implement selection based on enum type. make new array list and pluck out appropriate types to return in new list.
    @Override
    public ArrayList<IGameEntity> getVikings(IGameEntity.Type t) {
        return vikings;
    }

    @Override
    public void disposeVikings() {
        vikings.clear();
        vikings = null;

    }

    @Override
    public void addViking(double xPos, double yPos, IGameEntity.Type t) {
        if (vikings == null)
            vikings = new ArrayList<IGameEntity>();
        vikings.add(new Viking(xPos, yPos, t));
    }


}




//////////////////////ACTIVATOR BELOW HERE//////////////////////
public class Activator implements BundleActivator {
    private ServiceRegistration registration;

    @Override
    public void start(BundleContext context) throws Exception {
        registration = context.registerService(IVikingService.class, new VikingService(), null);
    }

    @Override
    public void stop(BundleContext context) throws Exception {
        ServiceReference ref = context.getServiceReference(IVikingService.class);
        IVikingService v = (IVikingService) context.getService(ref);
        v.disposeVikings();
        registration.unregister();

    }
}