static void Main(string[] args)
{
IComponent component = new ConcreteComponent();
ConcreteDecoratorA decoratorA = new ConcreteDecoratorA(component);
ConcreteDecoratorB decoratorB = new ConcreteDecoratorB(decoratorA);
decoratorB.Operation();
}
static void Main1(string[] args)
{
ConcreteComponent c = new ConcreteComponent();
ConcreteDecoratorA d1 = new ConcreteDecoratorA();
ConcreteDecoratorB d2 = new ConcreteDecoratorB();
d1.SetComponent(c);
d2.SetComponent(d1);
d2.Operation();
Console.ReadKey();
}
/// <summary>
/// The Decorator Design Pattern aims to add functionality to existing classes. This is done by implementing a decorator base-class, that holds the classes to be decorated and executes its methods, thus enabling a chain of calls.
/// </summary>
/// <example>
/// Real life uses include...
/// - adding filters-criterias to filter a data-set
/// - adding calculations to models - fx meteological maps
/// - decorating a command with others, thus creating a chain of commands to be executed
/// </example>
private static void Main()
{
// Create ConcreteComponent and two Decorators
ConcreteComponent c = new ConcreteComponent();
ConcreteDecoratorA d1 = new ConcreteDecoratorA(c);
ConcreteDecoratorB d2 = new ConcreteDecoratorB(d1);
d2.Operation();
// Wait for user
Console.ReadKey();
}
static void Main(string[] args)
{
ConcreteComponent cComponent = new ConcreteComponent();
ConcreteDecoratorA cdA = new ConcreteDecoratorA();
ConcreteDecoratorB cdB = new ConcreteDecoratorB();
cdA.SetComponent(cComponent);
cdB.SetComponent(cdA);
cdB.Operation();
Console.ReadLine();
}
static void Main(string[] args)
{
ConcreteComponent component = new ConcreteComponent();
ConcreteDecoratorA decoratorA = new ConcreteDecoratorA();
ConcreteDecoratorB decoratorB = new ConcreteDecoratorB();
decoratorA.Component = component;
decoratorB.Component = decoratorA;
decoratorB.Operation();
Console.Read();
}
static void Main(string[] args)
{
// Create ConcreteComponent and two Decorators
ConcreteComponent c = new ConcreteComponent();
ConcreteDecoratorA d1 = new ConcreteDecoratorA();
ConcreteDecoratorB d2 = new ConcreteDecoratorB();
// Link decorators
d1.SetComponent(c);
d2.SetComponent(d1);
d2.Operation();
}
static void Main(string[] args)
{
ConcreteComponent concreteComponent = new ConcreteComponent();
ConcreteDecoratorA concreteDecoratorA = new ConcreteDecoratorA();
ConcreteDecoratorB concreteDecoratorB = new ConcreteDecoratorB();
concreteDecoratorA.Component = concreteComponent;
concreteDecoratorB.Component = concreteDecoratorA;
concreteDecoratorB.Operation();
Console.Read();
}
private static void Main(string[] args)
{
var c = new ConcreteComponent();
var a = new ConcreteDecoratorA();
var b = new ConcreteDecoratorB();
c.Operation();
a.SetComponent(c);
a.Operation();
b.SetComponent(a);
b.Operation();
Console.ReadKey();
}
static void Main()
{
// Create ConcreteComponent and two Decorators
ConcreteComponent component = new ConcreteComponent();
ConcreteDecoratorA decorator1 = new ConcreteDecoratorA();
ConcreteDecoratorB decorator2 = new ConcreteDecoratorB();
// Link decorators
decorator1.SetComponent(component);
decorator2.SetComponent(decorator1);
decorator2.Operation();
// Wait for user
Console.ReadKey();
}
private static void Main(string[] args)
{
var c = new ConcreteComponent();
var a = new ConcreteDecoratorA();
var b = new ConcreteDecoratorB();
c.Operation();
a.SetComponent(c);
a.Operation();
b.SetComponent(a);
b.Operation();
Console.ReadKey();
}
static void Main()
{
// Create ConcreteComponent and two Decorators
ConcreteComponent c = new ConcreteComponent();
ConcreteDecoratorA d1 = new ConcreteDecoratorA();
ConcreteDecoratorB d2 = new ConcreteDecoratorB();
// Link decorators
d1.SetComponent(c);
d2.SetComponent(d1);
d2.Operation();
// Wait for user
Console.Read();
}
static void Main(string[] args)
{
try
{
{//BasicStructure
ConcreteComponent c = new ConcreteComponent();
ConcreteDecoratorA d1 = new ConcreteDecoratorA();
ConcreteDecoratorB d2 = new ConcreteDecoratorB();
d1.SetComponent(c);
d2.SetComponent(d1);
d2.Operation();
}
{//SituationSimulation
//第一种写法
Console.WriteLine("***************第一种写法：***************");
AppleHandset handset = new AppleHandset();
HandsetSticker handsetSticker = new HandsetSticker(handset);
HandsetCasing handsetCasing = new HandsetCasing(handsetSticker);
handsetCasing.Operation();
//第二种写法
Console.WriteLine("***************第二种写法：***************");
Handset appleHandset = new AppleHandset();
appleHandset = new HandsetSticker(appleHandset);
appleHandset = new HandsetCasing(appleHandset);
appleHandset.Operation();
//第二种写法的简化
Console.WriteLine("***************第二种写法的简化：***************");
new HandsetCasing(new HandsetSticker(new AppleHandset())).Operation();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.ReadKey();
}
static void Main(string[] args)
{
try
{
//介绍
// 意图：动态地给一个对象添加一些额外的职责。就增加功能来说，装饰器模式相比生成子类更为灵活。
//主要解决：一般的，我们为了扩展一个类经常使用继承方式实现，由于继承为类引入静态特征，并且随着扩展功能的增多，子类会很膨胀。
//何时使用：在不想增加很多子类的情况下扩展类。
//如何解决：将具体功能职责划分，同时继承装饰者模式。
//关键代码： 1、Component 类充当抽象角色，不应该具体实现。 2、修饰类引用和继承 Component 类，具体扩展类重写父类方法。
//应用实例： 1、孙悟空有 72 变，当他变成"庙宇"后，他的根本还是一只猴子，但是他又有了庙宇的功能。 2、不论一幅画有没有画框都可以挂在墙上，但是通常都是有画框的，并且实际上是画框被挂在墙上。在挂在墙上之前，画可以被蒙上玻璃，装到框子里；这时画、玻璃和画框形成了一个物体。
//优点：装饰类和被装饰类可以独立发展，不会相互耦合，装饰模式是继承的一个替代模式，装饰模式可以动态扩展一个实现类的功能。
//缺点：多层装饰比较复杂。
//使用场景： 1、扩展一个类的功能。 2、动态增加功能，动态撤销。
//注意事项：可代替继承。
//概念：1.动态地给一个对象添加一个额外的职责，就增加功能来说，装饰模式比生成子类更加灵活、
// 2.装饰器模式是利用SetComponent来对对象进行包装的，这样每个装饰对象的实现就和如何使用这个对象分离开了，每个装饰对象只关心自己的功能，不需要关心如何被添加到对象链当中（DPE）
#region 装饰模式
ConcreteComponent c = new ConcreteComponent();
ConcreteDecoratorA d1 = new ConcreteDecoratorA();
ConcreteDecoratorB d2 = new ConcreteDecoratorB();
d1.SetComponent(c);
d2.SetComponent(d1);
d2.Operation();
Person xc = new Person("小菜");
Console.WriteLine("\n第一种装扮：");
Sneakers pqx = new Sneakers();
BigTrouser kk = new BigTrouser();
TShirts dtx = new TShirts();
pqx.Decorate(xc);
kk.Decorate(pqx);
dtx.Decorate(kk);
dtx.Show();
Console.WriteLine("\n第二种装扮：");
LeatherShoes px = new LeatherShoes();
Tie ld = new Tie();
Suit xz = new Suit();
px.Decorate(xc);
ld.Decorate(px);
xz.Decorate(ld);
xz.Show();
Console.WriteLine("\n第三种装扮：");
Sneakers pqx2 = new Sneakers();
LeatherShoes px2 = new LeatherShoes();
BigTrouser kk2 = new BigTrouser();
Tie ld2 = new Tie();
pqx2.Decorate(xc);
px2.Decorate(pqx);
kk2.Decorate(px2);
ld2.Decorate(kk2);
ld2.Show();
#endregion
}
catch (Exception e)
{
Console.WriteLine($"遇到异常,ErrorMsg：{e.Message}");
Console.ReadLine();
}
}