1 /*
   2  * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.ch;
  27 
  28 import java.io.IOException;
  29 import java.nio.channels.*;
  30 import java.nio.channels.spi.*;
  31 
  32 
  33 /**
  34  * An implementation of SelectionKey for Solaris.
  35  */
  36 
  37 public class SelectionKeyImpl
  38     extends AbstractSelectionKey
  39 {
  40 
  41     final SelChImpl channel;                            // package-private
  42     public final SelectorImpl selector;
  43 
  44     // Index for a pollfd array in Selector that this key is registered with
  45     private int index;
  46 
  47     private volatile int interestOps;
  48     private int readyOps;
  49 
  50     SelectionKeyImpl(SelChImpl ch, SelectorImpl sel) {
  51         channel = ch;
  52         selector = sel;
  53     }
  54 
  55     public SelectableChannel channel() {
  56         return (SelectableChannel)channel;
  57     }
  58 
  59     public Selector selector() {
  60         return selector;
  61     }
  62 
  63     int getIndex() {                                    // package-private
  64         return index;
  65     }
  66 
  67     void setIndex(int i) {                              // package-private
  68         index = i;
  69     }
  70 
  71     private void ensureValid() {
  72         if (!isValid())
  73             throw new CancelledKeyException();
  74     }
  75 
  76     public int interestOps() {
  77         ensureValid();
  78         return interestOps;
  79     }
  80 
  81     public SelectionKey interestOps(int ops) {
  82         ensureValid();
  83         return nioInterestOps(ops);
  84     }
  85 
  86     public int readyOps() {
  87         ensureValid();
  88         return readyOps;
  89     }
  90 
  91     // The nio versions of these operations do not care if a key
  92     // has been invalidated. They are for internal use by nio code.
  93 
  94     public void nioReadyOps(int ops) {
  95         readyOps = ops;
  96     }
  97 
  98     public int nioReadyOps() {
  99         return readyOps;
 100     }
 101 
 102     public SelectionKey nioInterestOps(int ops) {
 103         if ((ops & ~channel().validOps()) != 0)
 104             throw new IllegalArgumentException();
 105         channel.translateAndSetInterestOps(ops, this);
 106         interestOps = ops;
 107         return this;
 108     }
 109 
 110     public int nioInterestOps() {
 111         return interestOps;
 112     }
 113 
 114 }