package example4_2;

import java.util.ArrayList;
import java.util.Random;

/**
 * Author: Josiah Yoder et al.
 * Class: SExxxx-xx
 * Date: 1/7/14 7:45 AM
 * Lesson: Week x, Day x
 */
public class Example implements Subject {
    double positionMeters = 0;

    ArrayList<Observer> observers = new ArrayList<Observer>();

    @Override
    public void attach(Observer obs) {
        observers.add(obs);
    }

    @Override
    public void detach(Observer obs) {
        //To change body of implemented methods use File | Settings | File Templates.
    }

    @Override
    public void notifyObservers() {
        for(Observer obs : observers) {
            obs.update(positionMeters);
        }
    }

    public static void main(String[] ignored) {
        Example ex = new Example();
        ex.run();
    }

    public void run() {
        Observer obs1 = new PrintingObserver();
        Random gen = new Random();
        this.attach(obs1);

        for(int i= 0; i<10; i++) {
            positionMeters += gen.nextDouble();
            notifyObservers();
//            System.out.println("Now we are at: "+positionMeters);
        }
    }
}