63 lines
1.3 KiB
C#
63 lines
1.3 KiB
C#
/* Декоратор
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Динамически предоставляет объекту
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дополнительные возможности. Представляет
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собой гибкую альтернативу наследованию
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для расширения функциональности.
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*/
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class Program
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{
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static void Main()
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{
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#region Пример №1 - базовое
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Pizza r = new RussianPizza();
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Console.WriteLine(r.GetCost());
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Pizza i = new TomatoPizza(r);
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Console.WriteLine(i.GetCost());
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Console.ReadKey();
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#endregion
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}
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}
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abstract class Pizza
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{
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public string Name { get; set; }
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public Pizza(string name)
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{
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Name = name;
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}
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public abstract int GetCost();
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}
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class RussianPizza : Pizza
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{
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public RussianPizza() : base("Russian Pizza")
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{
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}
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public override int GetCost()
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{
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return 1000;
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}
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}
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abstract class PizzaDecorator : Pizza
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{
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protected Pizza pizza;
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protected PizzaDecorator(string name, Pizza pizza) : base(name)
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{
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this.pizza = pizza;
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}
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}
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class TomatoPizza : PizzaDecorator
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{
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public TomatoPizza(Pizza pizza) : base(pizza.Name + ", tomato", pizza)
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{
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}
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public override int GetCost()
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{
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return pizza.GetCost() + 100;
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}
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}
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