Flyweight Pattern)

Flyweight Pattern)

Code download

1. Concept

Use the sharing technology to effectively support a large number of fine-grained objects.

2. Class Diagram

Model. cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace FlyweightPattern{    public class Model    {        public double D1        {            get;            set;        }        public double D2        {            get;            set;        }    }}

AbstractSum. cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace FlyweightPattern{    public abstract class AbstractSum    {        public abstract double Sum(Model md);           }}

Sum1.cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace FlyweightPattern{    public class Sum1 : AbstractSum    {        public override double Sum(Model md)        {            return md.D1 + md.D2;        }    }}

Sum2.cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace FlyweightPattern{    public class Sum2 : AbstractSum    {        public override double Sum(Model md)        {            return md.D1 * md.D2;        }    }}

FlyweightUse. cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace FlyweightPattern{    public class FlyweightUse    {               private Dictionary<string, AbstractSum> _sumObjects = new Dictionary<string, AbstractSum>();        public AbstractSum GetSumObject(string key)        {            AbstractSum SumObject = null;            if (_sumObjects.ContainsKey(key))            {                SumObject = _sumObjects[key];            }            else            {                switch (key)                {                    case "Sum1": SumObject = new Sum1(); break;                    case "Sum2": SumObject = new Sum2(); break;                }                _sumObjects.Add(key, SumObject);            }            return SumObject;        }    }}

3. Call

Code download