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public class MenuComponent {
public void add(MenuComponent menuComponent) {throw new UnsupportedOperationException();}
public void remove(MenuComponent menuComponent) {throw new UnsupportedOperationException();}
public MenuComponent getChild(int i) {throw new UnsupportedOperationException();}
public String getName() {throw new UnsupportedOperationException();}
public String getDescription() {throw new UnsupportedOperationException();}
public double getPrice() {throw new UnsupportedOperationException();}
public boolean isVegetarian() {throw new UnsupportedOperationException();}
public void print() {throw new UnsupportedOperationException();}
}
public class MenuItem extends MenuComponent {
String name;
String description;
boolean vegetarian;
double price;
public MenuItem(String name, String description, boolean vegetarian, double price) {
this.name = name;
this.description = description;
this.vegetarian = vegetarian;
this.price = price;
}
public String getName() {
return name;
}
public String getDescription() {
return description;
}
public double getPrice() {
return price;
}
public boolean isVegetarian() {
return vegetarian;
}
public void print() {
System.out.print(" " + getName());
if (isVegetarian()) {
System.out.print(" (v)");
}
System.out.println(", " + getPrice());
System.out.println("-- " + getDescription());
}
}
public class Menu extends MenuComponent {
ArrayList menuComponents = new ArrayList();
String name;
String description;
public Menu(String name, String description) {
this.name = name;
this.description = description;
}
public void add(MenuComponent menuComponent) {
menuComponents.add(menuComponent);
}
public void remove(MenuComponent menuComponent) {
menuComponents.remove(menuComponent);
}
public MenuComponent getChild(int i) {
return (MenuComponent) menuComponents.get(i);
}
public String getName() {
return name;
}
public String getDescription() {
return description;
}
public void print() {
System.out.print("\n" + getName());
System.out.println(", " + getDesc());
System.out.print("---------------------\n");
Iterator iterator = menuComponents.iterator();
while (iterator.hasNext()) {
MenuComponent menuComponent = (MenuComponent) iterator.next();
menuComponent.print();
}
}
}
public class CompositeClient {
public static void main(String[] args) {
MenuComponent pancakeHouseMenu = new Menu("PANCAKE HOUSE MENU", "Breakfast");
MenuComponent dinerMenu = new Menu("DINER MENU", "Lunch");
MenuComponent cafeMenu = new Menu("CAFE MENU", "Dinner");
MenuComponent dessertMenu = new Menu("DESSERT MENU", "Dessert of course !");
MenuComponent allMenus = new Menu("ALL MENUS", "All menus combined");
allMenus.add(pancakeHouseMenu);
allMenus.add(dinerMenu);
allMenus.add(cafeMenu);
pancakeHouseMenu.add(new MenuItem("K & B’s Pancake Breakfast", "Pancakes with scrambled eggs, and toast", true, 2.99));
pancakeHouseMenu.add(new MenuItem("Regular Pancake Breakfast", "Pancakes with fried eggs, sausage", false, 2.99));
pancakeHouseMenu.add(new MenuItem("Blueberry Pancakes", "Pancakes made with fresh blueberries", true, 3.49));
pancakeHouseMenu.add(new MenuItem("Waffles", "Waffles, with your choice of blueberries or strawberries", true, 3.59));
dinerMenu.add(new MenuItem("Pasta", "Spaghetti with Marinara Sauce, and a slice of sourdough bread", true, 3.89));
dinerMenu.add(new MenuItem("Vegetarian BLT", " (Fakin’)Bacon with lettuce & tomato on whole wheat", true, 2.99));
dinerMenu.add(new MenuItem("BLT", "Bacon with lettuce & tomato on whole wheat", false, 2.99));
dinerMenu.add(new MenuItem("Soup of the day", "Soup of the day, with a side of potato salad", false, 3.29));
dinerMenu.add(dessertMenu);
dessertMenu.add(new MenuItem("Apple Pie", "Apple pie with a flakey crust, topped with vanilla icecream", true, 1.59));
cafeMenu.add(new MenuItem("Veggie Burger and Air Fries", "Veggie burger on a whole wheat bun, lettuce, tomato, and fries", true, 3.99));
cafeMenu.add(new MenuItem("Soup of the day", "A cup of the soup of the day, with a side salad", false, 3.69));
cafeMenu.add(new MenuItem("Burrito", "A large burrito, with whole pinto beans, salsa, guacamole", true, 4.29));
allMenus.print();
}
}
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