corda/classpath/java/nio/channels/ServerSocketChannel.java

/* Copyright (c) 2008-2009, Avian Contributors

   Permission to use, copy, modify, and/or distribute this software
   for any purpose with or without fee is hereby granted, provided
   that the above copyright notice and this permission notice appear
   in all copies.

   There is NO WARRANTY for this software.  See license.txt for
   details. */

package java.nio.channels;

import java.io.IOException;

import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class ServerSocketChannel extends SelectableChannel {
  private final SocketChannel channel;

  private ServerSocketChannel() throws IOException {
    channel = new SocketChannel();
  }

  public static ServerSocketChannel open() throws IOException {
    return new ServerSocketChannel();
  }

  public int socketFD() {
    return channel.socketFD();
  }

  public SelectableChannel configureBlocking(boolean v) throws IOException {
    return channel.configureBlocking(v);
  }

  public void close() throws IOException {
    channel.close();
  }

  public SocketChannel accept() throws Exception {
    SocketChannel c = new SocketChannel();
    c.socket = doAccept();
    c.connected = true;
    return c;
  }

  public ServerSocket socket() {
    return new Handle();
  }

  private int doAccept() throws IOException {
    while (true) {
      int s = natDoAccept(channel.socket);
      if (s != -1) {
        return s;
      }
      // todo: throw ClosedByInterruptException if this thread was
      // interrupted during the accept call
    }
  }

  private int doListen(String host, int port) throws IOException {
    Socket.init();

    return natDoListen(host, port);
  }

  public class Handle extends ServerSocket {
    public void bind(SocketAddress address)
      throws IOException
    {
      InetSocketAddress a;
      try {
        a = (InetSocketAddress) address;
      } catch (ClassCastException e) {
        throw new IllegalArgumentException();
      }
      channel.socket = doListen(a.getHostName(), a.getPort());
      channel.configureBlocking(channel.isBlocking());
    }
  }

  private static native int natDoAccept(int socket) throws IOException;
  private static native int natDoListen(String host, int port) throws IOException;
}