using System;
using System.Collections;
using System.Linq;
public class IdInfo
{
public int IdNumber;
public IdInfo(int IdNumber)
{
this.IdNumber = IdNumber;
}
}
public class Person : ICloneable
{
public int Age;
public string Name;
public IdInfo IdInfo;
public Person ShallowCopy()
{
return (Person)this.MemberwiseClone();
}
protected virtual Person DeepCopy()
{
Person other = (Person)this.MemberwiseClone();
// Deep-copy children
other.IdInfo = new IdInfo(IdInfo.IdNumber);
other.Name = String.Copy(Name);
return other;
}
public Person Clone(){
return DeepCopy();
}
object ICloneable.Clone()
{
return DeepCopy();
}
}
public class Example
{
public static void Main()
{
Person p1 = new Person();
p1.Age = 42;
p1.Name = "Sam";
p1.IdInfo = new IdInfo(6565);
// shallow copy 경우, p1 p2 둘다 독립적인 객체이며 동일한 결과값임.
Console.WriteLine("======== Shallow Copy =======");
Person p2 = p1.ShallowCopy();
Console.WriteLine(" p1 instance values: ");
DisplayValues(p1);
Console.WriteLine(" p2 instance values:");
DisplayValues(p2);
// 복사본 p2 객체를 변경하면 'reference' 인 IdInfo 개체참조는 p1, p2 가 함께 공유함.
Console.WriteLine("========= Shallow Copy p2 객체 변경 ============");
p2.Age = 32;
p2.Name = "Frank";
p2.IdInfo.IdNumber = 7878;
Console.WriteLine(" p1 instance values: ");
DisplayValues(p1);
Console.WriteLine(" p2 instance values:");
DisplayValues(p2);
Console.WriteLine("========= Shallow Copy p1 객체 변경 ============");
p1.IdInfo.IdNumber = 8888;
Console.WriteLine(" p1 instance values: ");
DisplayValues(p1);
Console.WriteLine(" p2 instance values:");
DisplayValues(p2);
// deep copy 경우, reference 개체참조까지 전부 복사하여 독립적인 객체임.
Console.WriteLine("========== Depp Copy ============");
Person p3 = p1.Clone();
p1.Name = "George";
p1.Age = 39;
p1.IdInfo.IdNumber = 8641;
Console.WriteLine(" p1 instance values: ");
DisplayValues(p1);
Console.WriteLine(" p3 instance values:");
DisplayValues(p3);
}
public static void DisplayValues(Person p)
{
Console.WriteLine(" Name: {0:s}, Age: {1:d}", p.Name, p.Age);
Console.WriteLine(" Value: {0:d}", p.IdInfo.IdNumber);
}
}
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