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}