using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Adapter
{
public interface INewLog
{
void WriteLog();
}
public interface IOldLog
{
void Write();
}
class FileLog:IOldLog
{
public void Write()
{
Console.WriteLine("Write log in file. ");
}
}
class DataBaseLog:IOldLog
{
public void Write()
{
Console.WriteLine("Write log in database. ");
}
}
class Adapter:INewLog //须具备新接口，老功能
{
private IOldLog iol;
private IOldLog iol2;
public Adapter()
{
}
public Adapter(IOldLog iol, IOldLog iol2)
{
this.iol = iol;
this.iol2 = iol2;
}
public void WriteLog()
{
iol.Write();
iol2.Write();
}
}
class Program
{
public static void Main()
{
/*
FileLog fl = new FileLog();
// Adapter a1 = new Adapter(fl);
INewLog a1 = new Adapter(new FileLog());
a1.WriteLog();
DataBaseLog dl = new DataBaseLog();
// Adapter a2 = new Adapter(dl);
INewLog a2 = new Adapter(new DataBaseLog());
a2.WriteLog();*/
FileLog fl = new FileLog();
DataBaseLog dl = new DataBaseLog();
INewLog inl = new Adapter(fl,dl);
inl.WriteLog();
Console.Read();
}
}
}
/*
namespace Adapter
{
class OldClassA
{
public void XXOO() //A 老代码
{
Console.WriteLine("Hello, Everyone!");
}
public void OOXX()
{
Console.WriteLine("Byebye, Everyone!");
}
}
abstract class NewClassB //B 这样用
{
abstract public void SayHello();
abstract public void SayBye();
}
class OldAdapterNew:NewClassB
{
private OldClassA oca = new OldClassA();
public override void SayHello()
{
oca.XXOO();
}
public override void SayBye()
{
oca.OOXX();
}
}
class Program
{
static void Main(string[] args)
{
OldAdapterNew oan = new OldAdapterNew();
oan.SayHello();
oan.SayBye();
Console.Read();
}
}
}
*/