상용 디자인 모드 정리

// Example
//     
public class Father{...}
//            ，        
public class Son1 : Father {...}
public class Son2 : Father {...}
//      ，              
public class Factroy
{
  Father father = null;
  swith(operate)
  {
    case "Son1":
      father = new Son1();
    case "...":
      father = ...
  }
  //     
}

// Example
//      
pulic abstract class Father
{
  //         
}
//              ，       
public class Son1 : Father{...}
public class Son2 : Father{...}
//      ，             ，           
public class Context
{
  //         
  Father father;
  //             
  public Context(Father father)
  {
    this.father = father;
  }
} 

// Example
//          
abstract class Component
{
  public abstract void Operation();
}

// MainObject             
class MainObject : Component 
{
  public overrive void Operation()
  {
    ......
  }
}
// Decorator        ，  Component
abstract class Decorator : Component
{
  protected Component component;
  
  public void SetComponent(Component component)
  {
    this.component = component;
  }
  
  public override void Operation()
  {
    if(component != null)
    {
      component.Operation();
    }
  }
}

// Example
//               
abstact class Subject
{
  public abstract void Request();
}
//       
class RealSubject : Subject
{
  public override void Request()
  {
    ...
  }
}
//    
class Proxy : Subject
{
  RealSubject realSubject;
  public override void Request()
  {
    if(realSubject == null)
    {
      realSubject = new RealSubject();
      ...
    }
    realSubject.Request();
  }
}