ServerSocket.accept() & Socket subclass

[oziris]

hello !

- Why doing that is incorrect ?

--- code ---
ServerSocket serverSocket = new ServerSocket(11000);
MySocket socket = serverSocket.accept();
--- /code ---

where MySocket is a subclass of java.net.Socket.

- Is there a mean to achieve this without using an encapsulation like

MySocket mySocket = new MySocket(java.net.Socket socket) ?

Thanks.

-o--

 

[Gordon Beaton]

I had to write a specific Socket class. So now I would
ServerSocket.accept() returns an instance of this class.

Have you looked at ServerSocket.setSocketFactory()?

/gordon

 

[zero]

hello !

- Why doing that is incorrect ?

--- code ---
ServerSocket serverSocket = new ServerSocket(11000);
MySocket socket = serverSocket.accept();
--- /code ---

where MySocket is a subclass of java.net.Socket.

That looks fine to me. Why do you think it is incorrect?

- Is there a mean to achieve this without using an encapsulation like

MySocket mySocket = new MySocket(java.net.Socket socket) ?

Thanks.

What are you trying to do here?

Some more information (and code) would be nice.

 

[oziris]

I had to write a specific Socket class. So now I would
ServerSocket.accept() returns an instance of this class.

The instruction

MySocket socket = (MySocket)serverSocket.accept();

throws a ClassCastException.

According to a reply to the same message on fr.comp.lang.java, the
means seems to consist in extend SocketImpl and related classes.

-o--

 

[oziris]

Here the reply of Fabien Bergeret on fr.comp.lang.java

Alors, faut creer une classe MySocket heritant de SocketImpl, puis
creer
une classe MySocketImplFactory qui implemente SocketImplFactory, et
enfin appeler la methode statique setSocketImplFactory de la classe
Socket.
C'est tout !

In English

You must create a class MySocket which extends SocketImpl and then a
class MySocketImplFactory which implements SocketImplFactory. And
finally you have to call the static method Socket.setSocketImplFactory.
That's all

Subject closed.

Thanks.

-o--

 

[zero]

I had to write a specific Socket class. So now I would
ServerSocket.accept() returns an instance of this class.

The instruction

MySocket socket = (MySocket)serverSocket.accept();

throws a ClassCastException.

According to a reply to the same message on fr.comp.lang.java, the
means seems to consist in extend SocketImpl and related classes.

-o--

That's not the same code as what you gave in the original post

This of course fails because serverSocket.accept() returns a Socket, not
MySocket. MySocket is a Socket, but not the other way around. The
SocketFactory method mentioned in the other post could work, or you can do
what you originally said:

MySocket socket = new MySocket(serverSocket.accept());

The SocketFactory way is cleaner, but more typing.