001/* ServerSocketChannel.java --
002   Copyright (C) 2002 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038package java.nio.channels;
039
040import java.io.IOException;
041import java.net.ServerSocket;
042import java.nio.channels.spi.AbstractSelectableChannel;
043import java.nio.channels.spi.SelectorProvider;
044
045
046/**
047 * @author Michael Koch
048 * @since 1.4
049 */
050public abstract class ServerSocketChannel extends AbstractSelectableChannel
051{
052  /**
053   * Initializes this channel.
054   */
055  protected ServerSocketChannel(SelectorProvider provider)
056  {
057    super(provider);
058  }
059
060  /**
061   * Accepts a connection made to this channel's socket.
062   *
063   * @exception IOException If an error occurs
064   * @exception AsynchronousCloseException If another thread closes this
065   * channel while the accept operation is in progress.
066   * @exception ClosedByInterruptException If another thread interrupts the
067   * current thread while the accept operation is in progress, thereby closing
068   * the channel and setting the current thread's interrupt status.
069   * @exception ClosedChannelException If the channel is closed.
070   * @exception NotYetBoundException If the channel's socket is not yet bound.
071   * @exception SecurityException If a security manager has been installed and
072   * it does not permit access to the remote endpoint of the new connection.
073   */
074  public abstract SocketChannel accept() throws IOException;
075
076  /**
077   * Retrieves the channels socket.
078   */
079  public abstract ServerSocket socket();
080
081  /**
082   * Opens a server socket channel.
083   *
084   * @exception IOException If an error occurs
085   */
086  public static ServerSocketChannel open() throws IOException
087  {
088    return SelectorProvider.provider().openServerSocketChannel();
089  }
090
091  /**
092   * Retrieves the valid operations for this channel.
093   */
094  public final int validOps()
095  {
096    return SelectionKey.OP_ACCEPT;
097  }
098}