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+/* SocketFactory.java -- factory for client sockets.
+ Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.net;
+
+import java.io.IOException;
+
+import java.net.InetAddress;
+import java.net.Socket;
+import java.net.UnknownHostException;
+
+import java.security.Security;
+
+/**
+ * A factory for client sockets. The purpose of this class is to serve
+ * as the superclass of server socket factories that produce client
+ * sockets of a particular type, such as <i>Secure Socket Layer</i>
+ * (<b>SSL</b>) sockets.
+ *
+ * @author Casey Marshall (rsdio@metastatic.org)
+ */
+public abstract class SocketFactory
+{
+
+ // Constructor.
+ // -------------------------------------------------------------------
+
+ /**
+ * Default 0-arguments constructor.
+ */
+ protected SocketFactory()
+ {
+ super();
+ }
+
+ // Class methods.
+ // -------------------------------------------------------------------
+
+ /**
+ * Returns the default socket factory. The type of factory
+ * returned may depend upon the installation.
+ *
+ * @return The default socket factory.
+ */
+ public static synchronized SocketFactory getDefault()
+ {
+ try
+ {
+ String s = Security.getProperty("gnu.defaultSocketFactory");
+ if (s != null)
+ {
+ Class c = Class.forName(s);
+ return (SocketFactory) c.newInstance();
+ }
+ }
+ catch (Exception e)
+ {
+ }
+ return new VanillaSocketFactory();
+ }
+
+ // Instance methods.
+ // -------------------------------------------------------------------
+
+ /**
+ * Returns an unbound client socket.
+ *
+ * @return The new, unbound socket.
+ */
+ public Socket createSocket() throws IOException
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ /**
+ * Creates a socket connected to a given host on a given port.
+ *
+ * @param host The hostname to connect to.
+ * @param port The port on <i>host</i> to connect to.
+ * @return A socket connected to <i>host</i> on <i>port</i>.
+ * @throws IOException If a network error occurs.
+ * @throws UnknownHostException If <i>host</i> cannot be resolved.
+ */
+ public abstract Socket createSocket(String host, int port) throws IOException, UnknownHostException;
+
+ /**
+ * Creates a socket connected to a given host on a given port,
+ * connecting locally to the interface with the given address and port.
+ *
+ * @param host The hostname to connect to.
+ * @param port The port on <i>host</i> to connect to.
+ * @param localHost The address of the local interface to bind to.
+ * @param localPort The local port to bind to.
+ * @return A socket connected to <i>host</i> on <i>port</i>.
+ * @throws IOException If a network error occurs.
+ * @throws UnknownHostException If <i>host</i> cannot be resolved.
+ */
+ public abstract Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException, UnknownHostException;
+
+ /**
+ * Creates a socket connected to a given host on a given port.
+ *
+ * @param host The host address to connect to.
+ * @param port The port on <i>host</i> to connect to.
+ * @return A socket connected to <i>host</i> on <i>port</i>.
+ * @throws IOException If a network error occurs.
+ */
+ public abstract Socket createSocket(InetAddress host, int port) throws IOException;
+
+ /**
+ * Creates a socket connected to a given host on a given port,
+ * connecting locally to the interface with the given address and port.
+ *
+ * @param host The host address to connect to.
+ * @param port The port on <i>host</i> to connect to.
+ * @param localHost The address of the local interface to bind to.
+ * @param localPort The local port to bind to.
+ * @return A socket connected to <i>host</i> on <i>port</i>.
+ * @throws IOException If a network error occurs.
+ */
+ public abstract Socket createSocket(InetAddress hast, int port, InetAddress localHost, int localPort) throws IOException;
+}