1 /* ServerSocketFactory.java -- factory for server sockets. 2 Copyright (C) 2004 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package javax.net; 40 41 import java.io.IOException; 42 43 import java.net.InetAddress; 44 import java.net.ServerSocket; 45 46 import java.security.Security; 47 48 /** 49 * A factory for server sockets. The purpose of this class is to serve 50 * as the superclass of server socket factories that produce server 51 * sockets of a particular type, such as <i>Secure Socket Layer</i> 52 * (<b>SSL</b>) server sockets. 53 * 54 * @author Casey Marshall (rsdio@metastatic.org) 55 */ 56 public abstract class ServerSocketFactory 57 { 58 59 // Constructors. 60 // ------------------------------------------------------------------------ 61 62 /** 63 * Default 0-argument constructor. 64 */ ServerSocketFactory()65 protected ServerSocketFactory() 66 { 67 super(); 68 } 69 70 // Class methods. 71 // ------------------------------------------------------------------------ 72 73 /** 74 * Returns the default server socket factory. The type of factory 75 * returned may depend upon the installation. 76 * 77 * @return The default server socket factory. 78 */ getDefault()79 public static synchronized ServerSocketFactory getDefault() 80 { 81 try 82 { 83 String s = Security.getProperty("gnu.defaultServerSocketFactory"); 84 if (s != null) 85 { 86 Class c = Class.forName(s); 87 return (ServerSocketFactory) c.newInstance(); 88 } 89 } 90 catch (Exception e) 91 { 92 } 93 return new VanillaServerSocketFactory(); 94 } 95 96 // Instance methods. 97 // ------------------------------------------------------------------------ 98 99 /** 100 * Create an unbound server socket. 101 * 102 * @return The new server socket. 103 * @throws IOException If a networking error occurs. 104 */ createServerSocket()105 public ServerSocket createServerSocket() throws IOException 106 { 107 throw new UnsupportedOperationException(); 108 } 109 110 /** 111 * Create a server socket bound to the given port. 112 * 113 * @param port The port to bind the server socket to. 114 * @return A server socket bound to <i>port</i>. 115 * @throws IOException If a networking error occurs. 116 */ createServerSocket(int port)117 public abstract ServerSocket createServerSocket(int port) throws IOException; 118 createServerSocket(int port, int backlog)119 public abstract ServerSocket createServerSocket(int port, int backlog) throws IOException; 120 createServerSocket(int port, int backlog, InetAddress bindAddress)121 public abstract ServerSocket createServerSocket(int port, int backlog, InetAddress bindAddress) throws IOException; 122 } 123