Introduction to designpattern_prototype

UML:

Sample:

Prototype()

• Declares an interface for cloning itself
• Define the interface for copying objects

Concreteprototype()

• Implements an operation for cloning itself
• Copy your own operations

Client()

• Creates a new object by asking a prototype to clone itself
• Create a new object to copy by accessing prototype

Prototype:

 

 1     Abstract    Class  Prototype
  2   {
  3     Private     String  _ Id;
  4     Public Prototype (  String  ID)
  5   {
  6     This  . _ Id  =  ID;
  7   }
  8     Public    String  ID
  9   {
  10     Get  {  Return  _ Id ;}
  11   }
  12     Public     Abstract Prototype clone ();
  13   } 

 

Concreteprototype1:

 

  1     Class  Concreteprototype1: Prototype
  2   {
  3     Public Concreteprototype1 (  String  ID)
  4   :  Base  (ID)
  5   {}
  6   
  7     Public     Override Prototype clone ()
  8   {
  9     Return  (Prototype)  This  . Memberwiseclone ();
  10   }
  11   } 

 

Concreteprototype2:

 1     Class  Concreteprototype2
  2   {
  3     Public  Concreteprototype2 (  String  ID)
  4   :  Base  (ID)
  5  {}
  6     Public     Override  Prototype clone ()
  7   {
  8     Return  (Prototype)  This  . Memberwiseclone ();
  9  }
  10   } 

 

Program:

  1     # Region  Prototype  
  2   Concreteprototype1 p1  =     New Concreteprototype1 (  "  I  "  );
  3   Concreteprototype1 C1  =  (Concreteprototype1) p1.clone ();
  4   Console. writeline (  "  Cloned: {0}  "  , C1.id );
  5  Concreteprototype2 p2  =     New  Concreteprototype2 (  "  II  "  );
  6   Concreteprototype2 C2  =  (Concreteprototype2) p2.clone ();
  7   Console. writeline (  " Cloned: {0}  "  , C2.id );
  8   Console. readkey ();
  9     # Endregion 

 

The prototype is to request a prototype to clone the object itself.