Source for gnu.java.nio.SelectionKeyImpl

   1: /* SelectionKeyImpl.java --
   2:    Copyright (C) 2002, 2003, 2006 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: package gnu.java.nio;
  39: 
  40: import java.nio.channels.CancelledKeyException;
  41: import java.nio.channels.SelectableChannel;
  42: import java.nio.channels.SelectionKey;
  43: import java.nio.channels.Selector;
  44: import java.nio.channels.spi.AbstractSelectionKey;
  45: 
  46: public abstract class SelectionKeyImpl extends AbstractSelectionKey
  47: {
  48:   private int readyOps;
  49:   private int interestOps;
  50:   private final SelectorImpl impl;
  51:   final SelectableChannel ch;
  52: 
  53:   public SelectionKeyImpl (SelectableChannel ch, SelectorImpl impl)
  54:   {
  55:     this.ch  = ch;
  56:     this.impl = impl;
  57:   }
  58: 
  59:   public SelectableChannel channel ()
  60:   {
  61:     return ch;
  62:   }
  63: 
  64:   public synchronized int readyOps ()
  65:   {
  66:     if (!isValid())
  67:       throw new CancelledKeyException();
  68: 
  69:     return readyOps;
  70:   }
  71: 
  72:   public synchronized SelectionKey readyOps (int ops)
  73:   {
  74:     if (!isValid())
  75:       throw new CancelledKeyException();
  76: 
  77:     readyOps = ops;
  78:     return this;
  79:   }
  80: 
  81:   public int interestOps ()
  82:   {
  83:     if (!isValid())
  84:       throw new CancelledKeyException();
  85: 
  86:     synchronized (impl.selectedKeys())
  87:       {
  88:         return interestOps;
  89:       }
  90:   }
  91: 
  92:   public SelectionKey interestOps (int ops)
  93:   {
  94:     if (!isValid())
  95:       throw new CancelledKeyException();
  96: 
  97:     synchronized (impl.selectedKeys())
  98:       {
  99:         interestOps = ops;
 100:       }
 101:     return this;
 102:   }
 103: 
 104:   public Selector selector ()
 105:   {
 106:     return impl;
 107:   }
 108: 
 109:   /* @deprecated */
 110:   public abstract int getNativeFD();
 111: }