Hello, I would like to know if it is possible to recover all classes in the project in D.

Example in c# :

Assembly asm = Assembly.GetAssembly(typeof(MyClass));

foreach (Type type in asm.GetTypes())
{
}

On Friday, 27 January 2017 at 21:02:13 UTC, medhi558 wrote:
> Hello, I would like to know if it is possible to recover all classes in the project in D.

Yes, `foreach(mod; ModuleInfo) foreach(lc; mod.localClasses)`... but why do you want it? That facility is kinda limited in doing many things with.

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;
    }
}

I have a last question, currently i use :
if(lc.name.indexOf("protocol.messages") != -1)

To know if the class is a NetworkMessage, Would be possible to do this

if(lc is NetworkMessage)


Sorry for my English, i speak french.

On Saturday, 28 January 2017 at 07:10:27 UTC, medhi558 wrote:
> I have a last question, currently i use :
> if(lc.name.indexOf("protocol.messages") != -1)
>
> To know if the class is a NetworkMessage, Would be possible to do this
>
> if(lc is NetworkMessage)
>
>
> Sorry for my English, i speak french.

if (auto nm = cast(NetworkMessage)lc)
{
  //do something with nm
}

On Saturday, 28 January 2017 at 07:39:51 UTC, rumbu wrote:
> On Saturday, 28 January 2017 at 07:10:27 UTC, medhi558 wrote:
>> I have a last question, currently i use :
>> if(lc.name.indexOf("protocol.messages") != -1)
>>
>> To know if the class is a NetworkMessage, Would be possible to do this
>>
>> if(lc is NetworkMessage)
>>
>>
>> Sorry for my English, i speak french.
>
> if (auto nm = cast(NetworkMessage)lc)
> {
>   //do something with nm
> }

It doesn't work because lc is TypeInfo_Class

On Saturday, 28 January 2017 at 08:18:15 UTC, medhi558 wrote:
> On Saturday, 28 January 2017 at 07:39:51 UTC, rumbu wrote:
>> On Saturday, 28 January 2017 at 07:10:27 UTC, medhi558 wrote:
>>> I have a last question, currently i use :
>>> if(lc.name.indexOf("protocol.messages") != -1)
>>>
>>> To know if the class is a NetworkMessage, Would be possible to do this
>>>
>>> if(lc is NetworkMessage)
>>>
>>>
>>> Sorry for my English, i speak french.
>>
>> if (auto nm = cast(NetworkMessage)lc)
>> {
>>   //do something with nm
>> }
>
> It doesn't work because lc is TypeInfo_Class

In this case:

if (lc == typeid(NetworkMessage))

On Saturday, 28 January 2017 at 07:03:51 UTC, medhi558 wrote:

>     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;
>     }
> }

As long as your class has a default constructor, you can use directly Object.factory(id):

public static NetworkMessage GetInstance(string id)
{
  return cast(NetworkMessage)(Object.factory(id));
}

abstract class NetworkMessage
{
    uint MessageId;
    //....
}

override class QueueStatusUpdateMessage : NetworkMessage
{
    uint MessageId = 1;
    //....
}

override class Message2 : NetworkMessage
{
    uint MessageId = 2;
    //....
}

override class Message3 : NetworkMessage
{
    uint MessageId = 3;
    //....
}

And I would like to retrieve all the classes that are based on 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 is NetworkMessage so
                {
                    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;
    }
}

On Saturday, 28 January 2017 at 09:05:13 UTC, rumbu wrote:
> As long as your class has a default constructor, you can use directly Object.factory(id):
>
> public static NetworkMessage GetInstance(string id)
> {
>   return cast(NetworkMessage)(Object.factory(id));
> }

It isn't possible. My function when I receive data :

private void ReceivedData(char[] buffer)
{
    BinaryReader reader = new BinaryReader();
    uint id = reader.ReadUInt();
    uint length = reader.ReadInt();
    if(length > reader.Available.length)
    {
       //waiting for the rest
       return;
    }

    NetworkMessage message = ProtocolMessageManager.GetInstance(id);
    message.Deserialize();

    //.....
}