2009-05-18 :-)
_ 朝ッ
0500 起床
_ 仕事
0830 出勤。
_ [Composite][デザインパターン]Head First デザインパターンを写経する - 9章 Composite パターン
疲れた。
#!/usr/bin/ruby -Ks
class MenuComponent
def add( menuComponent )
raise "unsupported operation"
end
def remove( menuComponent )
raise "unsupported operation"
end
def getChild( i )
raise "unsupported operation"
end
def getName
raise "unsupported operation"
end
def getDescription
raise "unsupported operation"
end
def getPrice
raise "unsupported operation"
end
def isVegetarian
raise "unsupported operation"
end
def Print
raise "unsupported operation"
end
end
class Menu < MenuComponent
def initialize( name, description )
@name = name
@description = description
@menuComponents = []
end
def add( menuComponent )
@menuComponents << menuComponent
end
def remove( menuComponent )
@menuComponents.delete( menuComponent )
end
def getChild( i )
@menuComponents[ i ]
end
def getName
@name
end
def getDescription
@description
end
def Print
puts "\n#{getName}"
puts " #{@getDescription}"
puts "---------------------"
@menuComponents.each{ |menuComponent|
menuComponent.Print
}
end
end
class MenuItem < MenuComponent
def initialize( name, description, vegetarian, price )
@name = name
@description = description
@vegetarian = vegetarian
@price = price
end
def getName
@name
end
def getDescription
@description
end
def getPrice
@price
end
def isVegetarian
@vegetarian
end
def Print
print " ", getName
if isVegetarian
print "(v)"
end
puts ", #{getPrice}"
puts " -- #{getDescription}"
end
end
class Waitress
def initialize( allMenus )
@allMenus = allMenus
end
def printMenu
@allMenus.Print
end
end
def main
pancakeHouseMenu = Menu.new( "PANCAKE HOUSE MENU", "Breakfast" )
dinerMenu = Menu.new("DINER MENU", "Lunch")
cafeMenu = Menu.new("CAFE MENU", "Dinner")
dessertMenu = Menu.new("DESSERT MENU", "Dessert of course!")
coffeeMenu = Menu.new("COFFEE MENU", "Stuff to go with your afternoon coffee")
allMenus = Menu.new("ALL MENUS", "All menus combined")
allMenus.add( pancakeHouseMenu )
allMenus.add( dinerMenu )
allMenus.add( cafeMenu )
pancakeHouseMenu.add(MenuItem.new(
"K&B's Pancake Breakfast",
"Pancakes with scrambled eggs, and toast",
true,
2.99))
pancakeHouseMenu.add(MenuItem.new(
"Regular Pancake Breakfast",
"Pancakes with fried eggs, sausage",
false,
2.99))
pancakeHouseMenu.add(MenuItem.new(
"Blueberry Pancakes",
"Pancakes made with fresh blueberries, and blueberry syrup",
true,
3.49))
pancakeHouseMenu.add(MenuItem.new(
"Waffles",
"Waffles, with your choice of blueberries or strawberries",
true,
3.59))
dinerMenu.add(MenuItem.new(
"Vegetarian BLT",
"(Fakin') Bacon with lettuce & tomato on whole wheat",
true,
2.99))
dinerMenu.add(MenuItem.new(
"BLT",
"Bacon with lettuce & tomato on whole wheat",
false,
2.99))
dinerMenu.add(MenuItem.new(
"Soup of the day",
"A bowl of the soup of the day, with a side of potato salad",
false,
3.29))
dinerMenu.add(MenuItem.new(
"Hotdog",
"A hot dog, with saurkraut, relish, onions, topped with cheese",
false,
3.05))
dinerMenu.add(MenuItem.new(
"Steamed Veggies and Brown Rice",
"Steamed vegetables over brown rice",
true,
3.99))
dinerMenu.add(MenuItem.new(
"Pasta",
"Spaghetti with Marinara Sauce, and a slice of sourdough bread",
true,
3.89))
dinerMenu.add(dessertMenu)
dessertMenu.add(MenuItem.new(
"Apple Pie",
"Apple pie with a flakey crust, topped with vanilla icecream",
true,
1.59))
dessertMenu.add(MenuItem.new(
"Cheesecake",
"Creamy New York cheesecake, with a chocolate graham crust",
true,
1.99))
dessertMenu.add(MenuItem.new(
"Sorbet",
"A scoop of raspberry and a scoop of lime",
true,
1.89))
cafeMenu.add(MenuItem.new(
"Veggie Burger and Air Fries",
"Veggie burger on a whole wheat bun, lettuce, tomato, and fries",
true,
3.99))
cafeMenu.add(MenuItem.new(
"Soup of the day",
"A cup of the soup of the day, with a side salad",
false,
3.69))
cafeMenu.add(MenuItem.new(
"Burrito",
"A large burrito, with whole pinto beans, salsa, guacamole",
true,
4.29))
cafeMenu.add(coffeeMenu)
coffeeMenu.add(MenuItem.new(
"Coffee Cake",
"Crumbly cake topped with cinnamon and walnuts",
true,
1.59))
coffeeMenu.add(MenuItem.new(
"Bagel",
"Flavors include sesame, poppyseed, cinnamon raisin, pumpkin",
false,
0.69))
coffeeMenu.add(MenuItem.new(
"Biscotti",
"Three almond or hazelnut biscotti cookies",
true,
0.89))
waitress = Waitress.new(allMenus)
waitress.printMenu()
end
main
% ./menu.rb
ALL MENUS
---------------------
PANCAKE HOUSE MENU
---------------------
K&B's Pancake Breakfast(v), 2.99
-- Pancakes with scrambled eggs, and toast
Regular Pancake Breakfast, 2.99
-- Pancakes with fried eggs, sausage
Blueberry Pancakes(v), 3.49
-- Pancakes made with fresh blueberries, and blueberry syrup
Waffles(v), 3.59
-- Waffles, with your choice of blueberries or strawberries
DINER MENU
---------------------
Vegetarian BLT(v), 2.99
-- (Fakin') Bacon with lettuce & tomato on whole wheat
BLT, 2.99
-- Bacon with lettuce & tomato on whole wheat
Soup of the day, 3.29
-- A bowl of the soup of the day, with a side of potato salad
Hotdog, 3.05
-- A hot dog, with saurkraut, relish, onions, topped with cheese
Steamed Veggies and Brown Rice(v), 3.99
-- Steamed vegetables over brown rice
Pasta(v), 3.89
-- Spaghetti with Marinara Sauce, and a slice of sourdough bread
DESSERT MENU
---------------------
Apple Pie(v), 1.59
-- Apple pie with a flakey crust, topped with vanilla icecream
Cheesecake(v), 1.99
-- Creamy New York cheesecake, with a chocolate graham crust
Sorbet(v), 1.89
-- A scoop of raspberry and a scoop of lime
CAFE MENU
---------------------
Veggie Burger and Air Fries(v), 3.99
-- Veggie burger on a whole wheat bun, lettuce, tomato, and fries
Soup of the day, 3.69
-- A cup of the soup of the day, with a side salad
Burrito(v), 4.29
-- A large burrito, with whole pinto beans, salsa, guacamole
COFFEE MENU
---------------------
Coffee Cake(v), 1.59
-- Crumbly cake topped with cinnamon and walnuts
Bagel, 0.69
-- Flavors include sesame, poppyseed, cinnamon raisin, pumpkin
Biscotti(v), 0.89
-- Three almond or hazelnut biscotti cookies
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