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ramalhoramalho
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exemplo de Composite: cardapio composto
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3 files changed

+240
-38
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3 files changed

+240
-38
lines changed

‎composite/demo.py‎

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from menu import Menu, MenuItem
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pancake_house_menu = Menu("PANCAKE HOUSE MENU", "Breakfast")
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diner_menu = Menu("DINER MENU", "Lunch")
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cafe_menu = Menu("CAFE MENU", "Dinner")
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dessert_menu = Menu("DESSERT MENU", "Dessert of course!")
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coffee_menu = Menu("COFFEE MENU", "Stuff to go with your afternoon coffee")
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all_menus = Menu("ALL MENUS", "All menus combined")
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all_menus.append(pancake_house_menu)
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all_menus.append(diner_menu)
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all_menus.append(cafe_menu)
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pancake_house_menu.append(MenuItem(
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"K&B's Pancake Breakfast",
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"Pancakes with scrambled eggs, and toast",
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True,
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2.99))
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pancake_house_menu.append(MenuItem(
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"Regular Pancake Breakfast",
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"Pancakes with fried eggs, sausage",
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False,
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2.99))
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pancake_house_menu.append(MenuItem(
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"Blueberry Pancakes",
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"Pancakes made with fresh blueberries, and blueberry syrup",
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True,
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3.49))
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pancake_house_menu.append(MenuItem(
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"Waffles",
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"Waffles, with your choice of blueberries or strawberries",
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True,
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3.59))
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diner_menu.append(MenuItem(
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"Vegetarian BLT",
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"(Fakin') Bacon with lettuce & tomato on whole wheat",
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True,
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2.99))
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diner_menu.append(MenuItem(
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"BLT",
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"Bacon with lettuce & tomato on whole wheat",
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False,
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2.99))
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diner_menu.append(MenuItem(
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"Soup of the day",
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"A bowl of the soup of the day, with a side of potato salad",
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False,
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3.29))
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diner_menu.append(MenuItem(
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"Hotdog",
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"A hot dog, with saurkraut, relish, onions, topped with cheese",
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False,
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3.05))
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diner_menu.append(MenuItem(
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"Steamed Veggies and Brown Rice",
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"Steamed vegetables over brown rice",
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True,
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3.99))
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diner_menu.append(MenuItem(
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"Pasta",
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"Spaghetti with Marinara Sauce, and a slice of sourdough bread",
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True,
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3.89))
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diner_menu.append(dessert_menu)
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dessert_menu.append(MenuItem(
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"Apple Pie",
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"Apple pie with a flakey crust, topped with vanilla icecream",
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True,
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1.59))
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dessert_menu.append(MenuItem(
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"Cheesecake",
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"Creamy New York cheesecake, with a chocolate graham crust",
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True,
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1.99))
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dessert_menu.append(MenuItem(
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"Sorbet",
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"A scoop of raspberry and a scoop of lime",
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True,
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1.89))
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cafe_menu.append(MenuItem(
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"Veggie Burger and Air Fries",
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"Veggie burger on a whole wheat bun, lettuce, tomato, and fries",
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True,
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3.99))
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cafe_menu.append(MenuItem(
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"Soup of the day",
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"A cup of the soup of the day, with a side salad",
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False,
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3.69))
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cafe_menu.append(MenuItem(
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"Burrito",
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"A large burrito, with whole pinto beans, salsa, guacamole",
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True,
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4.29))
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cafe_menu.append(coffee_menu)
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coffee_menu.append(MenuItem(
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"Coffee Cake",
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"Crumbly cake topped with cinnamon and walnuts",
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True,
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1.59))
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coffee_menu.append(MenuItem(
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"Bagel",
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"Flavors include sesame, poppyseed, cinnamon raisin, pumpkin",
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False,
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0.69))
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coffee_menu.append(MenuItem(
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"Biscotti",
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"Three almond or hazelnut biscotti cookies",
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True,
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0.89))
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class Garconete:
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def __init__(self, menu):
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self.menu = menu
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def display_menu(self):
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self.menu.display()
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jane = Garconete(all_menus)
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jane.display_menu()

‎composite/menu.py‎

Lines changed: 67 additions & 38 deletions
Original file line numberDiff line numberDiff line change
@@ -1,39 +1,68 @@
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from menuabc import MenuComponent
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import abc
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class ItemCardapio(abc.ABC):
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@abc.abstractmethod
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def incluir(self, item):
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'''incluir
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public abstract class MenuComponent {
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public void add(MenuComponent menuComponent) {
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throw new UnsupportedOperationException();
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}
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public void remove(MenuComponent menuComponent) {
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throw new UnsupportedOperationException();
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}
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public MenuComponent getChild(int i) {
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throw new UnsupportedOperationException();
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}
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public String getName() {
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throw new UnsupportedOperationException();
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}
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public String getDescription() {
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throw new UnsupportedOperationException();
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}
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public double getPrice() {
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throw new UnsupportedOperationException();
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}
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public boolean isVegetarian() {
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throw new UnsupportedOperationException();
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}
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public void print() {
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throw new UnsupportedOperationException();
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}
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}
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class Menu(MenuComponent):
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def __init__(self, name, description):
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self.menu_components = []
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self.__name = name
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self.__description = description
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def append(self, menu_component):
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self.menu_components.append(menu_component)
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def remove(self, menu_component):
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self.menu_components.remove(menu_component)
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def __getitem__(self, index):
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return self.menu_components[index]
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@property
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def name(self):
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return self.__name
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@property
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def description(self):
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return self.__description
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@property
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def is_vegetarian(self):
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return all(sub_menu.is_vegetarian for sub_menu in self.menu_components)
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def display(self):
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print('\n' + self.name, ', ', self.description, sep='')
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print('-' * 60);
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for menu_component in self.menu_components:
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menu_component.display()
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class MenuItem(MenuComponent):
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def __init__(self, name, description, vegetarian, price):
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self.__name = name
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self.__description = description
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self.__vegetarian = vegetarian
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self.__price = price
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@property
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def name(self):
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return self.__name
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@property
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def description(self):
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return self.__description
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@property
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def is_vegetarian(self):
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return self.__vegetarian
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@property
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def price(self):
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return self.__price
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def display(self):
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print(' ' + self.name, end='')
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if self.is_vegetarian:
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print('(v)', end='')
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print(',', self.price)
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print(' --', self.description);

‎composite/menuabc.py‎

Lines changed: 42 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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from abc import ABC, abstractmethod
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class MenuComponent(ABC):
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'''Item do cardápio, com sub-itens'''
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def append(self, item):
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'''incluir sub-item'''
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raise NotImplementedError()
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def remove(self, item):
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'''remover sub-item'''
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raise NotImplementedError()
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def __getitem__(self, i):
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'''obter sub-item pelo índice'''
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raise NotImplementedError()
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@property
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@abstractmethod
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def name(self):
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'''obter nome do item'''
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@property
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@abstractmethod
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def description(self):
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'''obter descrição do item'''
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@property
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@abstractmethod
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def description(self):
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'''obter preço do item'''
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@property
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@abstractmethod
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def is_vegetarian(self):
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'''obter booleano indicador de item vegetariano'''
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@abstractmethod
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def display(self):
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'''exibir item e sub-itens'''
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