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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.nio.channels.*;
     29 import java.nio.channels.spi.*;
     30 
     31 
     32 /**
     33  * An implementation of SelectionKey for Solaris.
     34  */
     35 
     36 public class SelectionKeyImpl
     37     extends AbstractSelectionKey
     38 {
     39 
     40     final SelChImpl channel;                            // package-private
     41     public final SelectorImpl selector;
     42 
     43     // Index for a pollfd array in Selector that this key is registered with
     44     private int index;
     45 
     46     private volatile int interestOps;
     47     private int readyOps;
     48 
     49     SelectionKeyImpl(SelChImpl ch, SelectorImpl sel) {
     50         channel = ch;
     51         selector = sel;
     52     }
     53 
     54     public SelectableChannel channel() {
     55         return (SelectableChannel)channel;
     56     }
     57 
     58     public Selector selector() {
     59         return selector;
     60     }
     61 
     62     int getIndex() {                                    // package-private
     63         return index;
     64     }
     65 
     66     void setIndex(int i) {                              // package-private
     67         index = i;
     68     }
     69 
     70     private void ensureValid() {
     71         if (!isValid())
     72             throw new CancelledKeyException();
     73     }
     74 
     75     public int interestOps() {
     76         ensureValid();
     77         return interestOps;
     78     }
     79 
     80     public SelectionKey interestOps(int ops) {
     81         ensureValid();
     82         return nioInterestOps(ops);
     83     }
     84 
     85     public int readyOps() {
     86         ensureValid();
     87         return readyOps;
     88     }
     89 
     90     // The nio versions of these operations do not care if a key
     91     // has been invalidated. They are for internal use by nio code.
     92 
     93     public void nioReadyOps(int ops) {
     94         readyOps = ops;
     95     }
     96 
     97     public int nioReadyOps() {
     98         return readyOps;
     99     }
    100 
    101     public SelectionKey nioInterestOps(int ops) {
    102         if ((ops & ~channel().validOps()) != 0)
    103             throw new IllegalArgumentException();
    104         channel.translateAndSetInterestOps(ops, this);
    105         interestOps = ops;
    106         return this;
    107     }
    108 
    109     public int nioInterestOps() {
    110         return interestOps;
    111     }
    112 
    113 }
    114