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var MenuComponent = function () {
};
MenuComponent.prototype.getName = function () {
throw new Error("该方法必须重写!");
};
MenuComponent.prototype.getDescription = function () {
throw new Error("该方法必须重写!");
};
MenuComponent.prototype.getPrice = function () {
throw new Error("该方法必须重写!");
};
MenuComponent.prototype.isVegetarian = function () {
throw new Error("该方法必须重写!");
};
MenuComponent.prototype.print = function () {
throw new Error("该方法必须重写!");
};
MenuComponent.prototype.add = function () {
throw new Error("该方法必须重写!");
};
MenuComponent.prototype.remove = function () {
throw new Error("该方法必须重写!");
};
MenuComponent.prototype.getChild = function () {
throw new Error("该方法必须重写!");
};
var MenuItem = function (sName, sDescription, bVegetarian, nPrice) {
MenuComponent.apply(this);
this.sName = sName;
this.sDescription = sDescription;
this.bVegetarian = bVegetarian;
this.nPrice = nPrice;
};
MenuItem.prototype = new MenuComponent();
MenuItem.prototype.getName = function () {
return this.sName;
};
MenuItem.prototype.getDescription = function () {
return this.sDescription;
};
MenuItem.prototype.getPrice = function () {
return this.nPrice;
};
MenuItem.prototype.isVegetarian = function () {
return this.bVegetarian;
};
MenuItem.prototype.print = function () {
console.log(this.getName() + ": " + this.getDescription() + ", " + this.getPrice() + "euros");
};
var Menu = function (sName, sDescription) {
MenuComponent.apply(this);
this.aMenuComponents = [];
this.sName = sName;
this.sDescription = sDescription;
this.createIterator = function () {
throw new Error("This method must be overwritten!");
};
};
Menu.prototype = new MenuComponent();
Menu.prototype.add = function (oMenuComponent) {
// 添加子菜品
this.aMenuComponents.push(oMenuComponent);
};
Menu.prototype.remove = function (oMenuComponent) {
// 删除子菜品
var aMenuItems = [];
var nMenuItem = 0;
var nLenMenuItems = this.aMenuComponents.length;
var oItem = null;
for (; nMenuItem < nLenMenuItems; ) {
oItem = this.aMenuComponents[nMenuItem];
if (oItem !== oMenuComponent) {
aMenuItems.push(oItem);
}
nMenuItem = nMenuItem + 1;
}
this.aMenuComponents = aMenuItems;
};
Menu.prototype.getChild = function (nIndex) {
//获取指定的子菜品
return this.aMenuComponents[nIndex];
};
Menu.prototype.getName = function () {
return this.sName;
};
Menu.prototype.getDescription = function () {
return this.sDescription;
};
Menu.prototype.print = function () {
// 打印当前菜品以及所有的子菜品
console.log(this.getName() + ": " + this.getDescription());
console.log("--------------------------------------------");
var nMenuComponent = 0;
var nLenMenuComponents = this.aMenuComponents.length;
var oMenuComponent = null;
for (; nMenuComponent < nLenMenuComponents; ) {
oMenuComponent = this.aMenuComponents[nMenuComponent];
oMenuComponent.print();
nMenuComponent = nMenuComponent + 1;
}
};
var DinnerMenu = function () {
Menu.apply(this);
};
DinnerMenu.prototype = new Menu();
var CafeMenu = function () {
Menu.apply(this);
};
CafeMenu.prototype = new Menu();
var PancakeHouseMenu = function () {
Menu.apply(this);
};
PancakeHouseMenu.prototype = new Menu();
var Mattress = function (aMenus) {
this.aMenus = aMenus;
};
Mattress.prototype.printMenu = function () {
this.aMenus.print();
};
var oPanCakeHouseMenu = new Menu("Pancake House Menu", "Breakfast");
var oDinnerMenu = new Menu("Dinner Menu", "Lunch");
var oCoffeeMenu = new Menu("Cafe Menu", "Dinner");
var oAllMenus = new Menu("ALL MENUS", "All menus combined");
oAllMenus.add(oPanCakeHouseMenu);
oAllMenus.add(oDinnerMenu);
oDinnerMenu.add(new MenuItem("Pasta", "Spaghetti with Marinara Sauce, and a slice of sourdough bread", true, 3.89));
oDinnerMenu.add(oCoffeeMenu);
oCoffeeMenu.add(new MenuItem("Express", "Coffee from machine", false, 0.99));
var oMattress = new Mattress(oAllMenus);
console.log("---------------------------------------------");
oMattress.printMenu();
console.log("---------------------------------------------");