Content providers

Content providers provide content for chunk systems (sounds simple, doesn't it?) - let's take over the spaceship example and create a class, called Universe. This universe contains multiple space ships. Let us begin with a simple implementation:

public class Universe implements ContentProvider, Updatetable {

   private List<Object> targets;

   public Universe() {
      targets = new ArrayList<Object>();
   }

   @Override
   public void remove(Object target) {
      targets.remove(target);
   }

   @Override
   public void add(Object target) {
      targets.add(target);
   }

   @Override
   public Collection<Object> getContent() {
      return targets;
   }

   @Override
   public void update() {
      for (Object target : targets) {
         if (target instanceof Updatetable) {
            ((Updatetable)target).update();
         }
      }
   }
}

That's it! It's on your own to render the world in a seperate class. Now you have met all conditions to work with chunk systems.