package headfirst.combining.observer;

public class QuackCounter implements Quackable {
        Quackable duck;
        static int numberOfQuacks;

        public QuackCounter(Quackable duck) {
                this.duck = duck;
        }

        public void quack() {
                duck.quack();
                numberOfQuacks++;
        }

        public static int getQuacks() {
                return numberOfQuacks;
        }

        public void registerObserver(Observer observer) {
                duck.registerObserver(observer);
        }

        public void notifyObservers() {
                duck.notifyObservers();
        }

        public String toString() {
                return duck.toString();
        }
}