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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 
     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 }
    115