Re: Reflection in D

[medhi558 via Digitalmars-d-learn]

I develop a game server. Currently I use a switch :

import protocol.messages.connection.Message1;
import protocol.messages.connection.Message2;
import protocol.messages.queues.Message3;
import ......
import protocol.messages.NetworkMessage;

class ProtocolMessageManager
{
        public static NetworkMessage GetInstance(uint id)
        {
              switch(id)
              {
                 case Message1.Id:
                     return new Message1();
                 case Message2.Id:
                     return new Message2();
                 .....

                 default:
                      return null;
              }
        }
}

what I want to do :

import protocol.messages.NetworkMessage;

class ProtocolMessageManager
{
    private static TypeInfo_Class[uint] m_types;

    public static void Init()
    {
        foreach(mod; ModuleInfo)
        {
            foreach(TypeInfo_Class lc; mod.localClasses)
            {
                if(lc.name.indexOf("protocol.messages") != -1)
                {
                    NetworkMessage c = 
cast(NetworkMessage)lc.create();
                    ProtocolMessageManager.m_types[c.MessageId] = lc;
                }
            }
                                        
        }
    }

    public static NetworkMessage GetInstance(string id)
    {
        auto v = (id in ProtocolMessageManager.m_types);
        if (v !is null)
	 return 
cast(NetworkMessage)ProtocolMessageManager.m_types[id].create();
        else
         return null;
    }
}