001    /* ServerSocketChannel.java --
002       Copyright (C) 2002 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    package java.nio.channels;
039    
040    import java.io.IOException;
041    import java.net.ServerSocket;
042    import java.nio.channels.spi.AbstractSelectableChannel;
043    import java.nio.channels.spi.SelectorProvider;
044    
045    
046    /**
047     * @author Michael Koch
048     * @since 1.4
049     */
050    public 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    }