Refactoring to command

1.

 

Using system;
Using system. Collections. Generic;
Using system. text;

Namespace refactor2command
{
Public class mail
{
Private string sender;

Public String sender
{
Get {return sender ;}
Set {sender = value ;}
}
Private string Explorer;

Public String Explorer
{
Get {return aggreger ;}
Set {Cycler = value ;}
}
Private datetime date;

Public datetime date
{
Get {return date ;}
Set {date = value ;}
}
Private string body;

Public String body
{
Get {return body ;}
Set {body = value ;}
}

Public mail (string _ sender, string _ receiver er, datetime _ date, string _ body)
{
Sender = _ sender;
Worker ER = _ worker er;
Date = _ date;
Body = _ body;
}
}

Public Enum request
{
Sendmail,
Replymail,
Receivemail,
Forwardmail
}

Public class mailsystem
{
Private mail;

Public mail
{
Get {return mail ;}
Set {mail = value ;}
}

Public void handle (request)
{

Logdown ();

If (request = request. Sendmail)
{

Console. writeline (string. Format ("send mail to: {0}", mail. Receiver ));
}
Else if (request = request. receivemail)
{
 
Console. writeline (string. Format ("receive mail from: {0}", mail. Sender ));
}
Else if (request = request. forwardmail)
{
 
Console. writeline (string. Format ("forward {0}'s mail to {1}", mail. Sender, mail. Receiver ));
}
Else if (request = request. replymail)
{
 
Console. writeline (string. Format ("Reply {0}'s mail on Date: {1}", mail. Sender, mail. Date ));
}
}

Private void logdown ()
{
Console. writeline (string. Format ("mail Sender: {0}", mail. Sender ));
Console. writeline (string. Format ("mail author Er: {0}", mail. Author ER ));
Console. writeline (string. Format ("mail Date: {0}", mail. Date ));
Console. writeline (string. Format ("mail body: {0}", mail. Body ));
}
}
}

2. After simple refactoring:

Public class mailsystem
{
Private mail;

Public mail
{
Get {return mail ;}
Set {mail = value ;}
}

Public void handle (request)
{
Logdown ();

If (request = request. Sendmail)
{
Sendmail ();
}
Else if (request = request. receivemail)
{
Receivemail ();
}
Else if (request = request. forwardmail)
{
Forwardmail ();
}
Else if (request = request. replymail)
{
Replymail ();
}
}

Private void replymail ()
{
Console. writeline (string. Format ("Reply {0}'s mail on Date: {1}", mail. Sender, mail. Date ));
}

Private void forwardmail ()
{
Console. writeline (string. Format ("forward {0}'s mail to {1}", mail. Sender, mail. Receiver ));
}

Private void receivemail ()
{
Console. writeline (string. Format ("receive mail from: {0}", mail. Sender ));
}

Private void Sendmail ()
{
Console. writeline (string. Format ("send mail to: {0}", mail. Receiver ));
}

Private void logdown ()
{
Console. writeline (string. Format ("mail Sender: {0}", mail. Sender ));
Console. writeline (string. Format ("mail author Er: {0}", mail. Author ER ));
Console. writeline (string. Format ("mail Date: {0}", mail. Date ));
Console. writeline (string. Format ("mail body: {0}", mail. Body ));
}
}
}

3. encapsulated commands

Public class mailsystem
{
Private mail;

Public mail
{
Get {return mail ;}
Set {mail = value ;}
}

Public void handle (request)
{
Logdown ();

If (request = request. Sendmail)
{
New sendmailcommand (). Handle (Mail );
}
Else if (request = request. receivemail)
{
New receivemailcommand (). Handle (Mail );
}
Else if (request = request. forwardmail)
{
New forwardmailcommand (). Handle (Mail );
}
Else if (request = request. replymail)
{
New replymailcommand (). Handle (Mail );
}
}

Private void logdown ()
{
Console. writeline (string. Format ("mail Sender: {0}", mail. Sender ));
Console. writeline (string. Format ("mail author Er: {0}", mail. Author ER ));
Console. writeline (string. Format ("mail Date: {0}", mail. Date ));
Console. writeline (string. Format ("mail body: {0}", mail. Body ));
}
}

Public class sendmailcommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("send mail to: {0}", mail. Receiver ));
}
}

Public class replymailcommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("Reply {0}'s mail on Date: {1}", mail. Sender, mail. Date ));
}
}

Public class forwardmailcommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("forward {0}'s mail to {1}", mail. Sender, mail. Receiver ));
}
}

Public class receivemailcommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("receive mail from: {0}", mail. Sender ));
}
}

4. Final reconstruction:

Public class mailsystem
{
Private mail;

Public mail
{
Get {return mail ;}
Set {mail = value ;}
}

Private hashtable cmdlist = new hashtable ();

Public mailsystem ()
{
Initcommand ();
}

Private void initcommand ()
{
Cmdlist. Add (request. forwardmail, new forwardmailcommand ());
Cmdlist. Add (request. receivemail, new receivemailcommand ());
Cmdlist. Add (request. replymail, new replymailcommand ());
Cmdlist. Add (request. Sendmail, new sendmailcommand ());
}

Public void handle (request)
{
Logdown ();
(Icommand) cmdlist [request]). Handle (Mail );
}

Private void logdown ()
{
Console. writeline (string. Format ("mail Sender: {0}", mail. Sender ));
Console. writeline (string. Format ("mail author Er: {0}", mail. Author ER ));
Console. writeline (string. Format ("mail Date: {0}", mail. Date ));
Console. writeline (string. Format ("mail body: {0}", mail. Body ));
}
}

Public interface icommand
{
Void handle (mail );
}

Public class sendmailcommand: icommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("send mail to: {0}", mail. Receiver ));
}
}

Public class replymailcommand: icommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("Reply {0}'s mail on Date: {1}", mail. Sender, mail. Date ));
}
}

Public class forwardmailcommand: icommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("forward {0}'s mail to {1}", mail. Sender, mail. Receiver ));
}
}

Public class receivemailcommand: icommand
{
Public void handle (mail)
{
Console. writeline (string. Format ("receive mail from: {0}", mail. Sender ));
}
}

5. Client:

public class client
{< br> Public static void main ()
{< br> mailsystem sys = new mailsystem ();
sys. mail = new mail ("flyingmain@gmail.com", "f.chen@cleversoft.com", datetime. now. date, "Happy New Year! ");
sys. handle (request. sendmail);
console. writeline ("========================================== =============================== ");
sys. handle (request. forwardmail);
console. writeline ("========================================== =============================== ");
sys. handle (request. receivemail);
console. writeline ("========================================== =============================== ");
sys. handle (request. replymail);
console. read ();
}< BR >}