1 /* ServerSocketChannelImpl.java --
2    Copyright (C) 2002, 2003, 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 gnu.java.nio;
40 
41 import java.io.IOException;
42 import java.net.ServerSocket;
43 import java.nio.channels.ClosedChannelException;
44 import java.nio.channels.NotYetBoundException;
45 import java.nio.channels.ServerSocketChannel;
46 import java.nio.channels.SocketChannel;
47 import java.nio.channels.spi.SelectorProvider;
48 
49 public final class ServerSocketChannelImpl extends ServerSocketChannel
50   implements VMChannelOwner
51 {
52   private VMChannel channel;
53   private NIOServerSocket serverSocket;
54   private boolean connected;
55 
ServerSocketChannelImpl(SelectorProvider provider)56   protected ServerSocketChannelImpl (SelectorProvider provider)
57     throws IOException
58   {
59     super (provider);
60     serverSocket = new NIOServerSocket(this);
61     channel = serverSocket.getPlainSocketImpl().getVMChannel();
62     configureBlocking(true);
63   }
64 
65   // XXX do we need this?
finalizer()66   public void finalizer()
67   {
68     if (channel.getState().isValid())
69       {
70         try
71           {
72             close ();
73           }
74         catch (Exception e)
75           {
76           }
77       }
78   }
79 
implCloseSelectableChannel()80   protected void implCloseSelectableChannel () throws IOException
81   {
82     connected = false;
83     channel.close();
84   }
85 
implConfigureBlocking(boolean blocking)86   protected void implConfigureBlocking (boolean blocking) throws IOException
87   {
88     channel.setBlocking(blocking);
89   }
90 
accept()91   public SocketChannel accept () throws IOException
92   {
93     if (!isOpen())
94       throw new ClosedChannelException();
95 
96     if (!serverSocket.isBound())
97       throw new NotYetBoundException();
98 
99     boolean completed = false;
100 
101     try
102       {
103         begin();
104         VMChannel client = channel.accept();
105         if (client == null)
106           return null;
107         else
108           {
109             completed = true;
110             return new SocketChannelImpl(provider(), client, false);
111           }
112       }
113     finally
114       {
115         end (completed);
116       }
117   }
118 
socket()119   public ServerSocket socket()
120   {
121     return serverSocket;
122   }
123 
getVMChannel()124   public VMChannel getVMChannel()
125   {
126     return channel;
127   }
128 }
129