package application;
import lang.Announcer;
import lang.Closure;
import java.util.Objects;
public class ApplicationModel {
private final Announcer<Closure> changeListener = Announcer.to(Closure.class);
private String message;
public String message() {
return message;
}
public void message(String message) {
if (Objects.equals(this.message, message)) return;
this.message = message;
changeListener.announce().execute();
}
public void onChange(Closure closure) {
changeListener.addListener(closure);
}
}