13# Flyweight패턴 Structural Patterns

 

static void Main(string[] args) {     //BuilderExample();     //FactoryExample();     //FactoryMethodExample();     //FactoryMethodExample2();     //ProtoTypeExample();     //SingletonExample();     //AdapterExample();     //BridgeExample();     //CompositeExample();     //DecoratorExample();     //FacadeExample();       FlyweightExample();       //Console.WriteLine("Hello World!");     Console.ReadKey(); }   static void FlyweightExample() {     string document = "AAZZBBZB";     char[] chars = document.ToCharArray();       CharacterFactory factory = new CharacterFactory();       Int32 pointSize = 10;       foreach(char c in chars)     {         pointSize++;           Character character = factory[c];         character.Display(pointSize);     } }   main.cs

 

using System;   namespace DesignPatterns.Structural_Patterns.Flyweight {     public abstract class Character     {         protected char Symbol { get; set; }         protected Int32 Width { get; set; }         protected Int32 Height { get; set; }         protected Int32 Ascent { get; set; }         protected Int32 Descent { get; set; }         protected Int32 PointSize { get; set; }           public abstract void Display(Int32 pointSize);     } }   Character.cs

 

using System;   namespace DesignPatterns.Structural_Patterns.Flyweight.Characters {     public class CharacterA : Character     {         public CharacterA()         {             this.Symbol = 'A';             this.Height = 100;             this.Width = 120;             this.Ascent = 70;             this.Descent = 0;         }           public override void Display(int pointSize)         {             this.PointSize = pointSize;               Console.WriteLine(string.Format("{0} (point size : {1})", this.Symbol, pointSize));         }     } }   CharacterA.cs

 

using System;   namespace DesignPatterns.Structural_Patterns.Flyweight.Characters {     public class CharacterB : Character     {         public CharacterB()         {             this.Symbol = 'B';             this.Height = 100;             this.Width = 140;             this.Ascent = 72;             this.Descent = 0;         }           public override void Display(int pointSize)         {             this.PointSize = pointSize;               Console.WriteLine(string.Format("{0} (point size : {1})", this.Symbol, pointSize));         }     } }   CharacterB.cs

 

using System;   namespace DesignPatterns.Structural_Patterns.Flyweight.Characters {     public class CharacterZ : Character     {         public CharacterZ()         {             this.Symbol = 'Z';             this.Height = 100;             this.Width = 100;             this.Ascent = 68;             this.Descent = 0;         }           public override void Display(int pointSize)         {             this.PointSize = pointSize;               Console.WriteLine(string.Format("{0} (point size : {1})", this.Symbol, pointSize));         }     } }   CharacterZ.cs

 

using System; using System.Collections.Generic;   namespace DesignPatterns.Structural_Patterns.Flyweight {     public class CharacterFactory     {         public Character this[char key]         {             get             {                 return GetCharacter(key);             }         }           private Dictionary<char, Character> characters = new Dictionary<char, Character>();         private readonly string NameSapcePath = "DesignPatterns.Structural_Patterns.Flyweight.Characters.Character";           private Character GetCharacter(char key)         {             if (characters.TryGetValue(key, out Character character) != true)             {                 Type t = Type.GetType(string.Format("{0}{1}", NameSapcePath, key));                 character = (Character)Activator.CreateInstance(t);                 characters.Add(key, character);             }               return character;         }     } }   CharacterFactory.cs

 

참고 사이트

https://www.dofactory.com/net/flyweight-design-pattern