Random menu back bean for JSF menu table

randomMenu.java

import nz.co.kevindoran.jsfmenutable.MenuTable;
import nz.co.kevindoran.jsfmenutable.Subscriber;

@ManagedBean
@ViewScoped
public class RandomMenu {
    private MenuTable<Category> menuTable;
    private static final int columnCount = 4;
    private Category currentCategory = new Category();
    
    public RandomMenu()  {
        menuTable = new MenuTable<>(columnCount);
        menuTable.setContents(currentCategory.getChildCategories());
        MenuClickListener menuListener = new MenuClickListener();
        menuTable.addSubscriber(menuListener);
    }
    
    private class MenuClickListener implements Subscriber<Category> {

        @Override
        public void update(Category change) {
            currentCategory = change;
            menuTable.setContents(currentCategory.getChildCategories());
        }
    }
    
    public MenuTable<Category> getMenuTable() {
        return menuTable;
    }

    public Category getCurrentCategory() {
        return currentCategory;
    }
}