about dynamic_cast!

Hi,

         In TransactionState::process, every sip message will be done dynamic_cast, I think this would affect performance. Could we do this way, maybe not good, just for discussion.

         Class TransactionMessage¡¯

         {

         Public:

virtual void Process() = 0;

}

 

Class SipMessage

{

Public:

         Void Process() { TransactionState::process(*this);}

}

 

 

class TransactionState

{

Public:

         Static Void process(SipMessage &msg);

         Static Void Process(KeepAliveMessage &msg);

Static Void Process(ConnectionTerminated&; msg)

}