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1 /*
2  * Copyright (c) 2000, 2012, 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 
SelectionKeyImpl(SelChImpl ch, SelectorImpl sel)50     SelectionKeyImpl(SelChImpl ch, SelectorImpl sel) {
51         channel = ch;
52         selector = sel;
53     }
54 
channel()55     public SelectableChannel channel() {
56         return (SelectableChannel)channel;
57     }
58 
selector()59     public Selector selector() {
60         return selector;
61     }
62 
getIndex()63     int getIndex() {                                    // package-private
64         return index;
65     }
66 
setIndex(int i)67     void setIndex(int i) {                              // package-private
68         index = i;
69     }
70 
ensureValid()71     private void ensureValid() {
72         if (!isValid())
73             throw new CancelledKeyException();
74     }
75 
interestOps()76     public int interestOps() {
77         ensureValid();
78         return interestOps;
79     }
80 
interestOps(int ops)81     public SelectionKey interestOps(int ops) {
82         ensureValid();
83         return nioInterestOps(ops);
84     }
85 
readyOps()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 
nioReadyOps(int ops)94     public void nioReadyOps(int ops) {
95         readyOps = ops;
96     }
97 
nioReadyOps()98     public int nioReadyOps() {
99         return readyOps;
100     }
101 
nioInterestOps(int ops)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 
nioInterestOps()110     public int nioInterestOps() {
111         return interestOps;
112     }
113 
114 }
115