KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > caucho > util > TimeUnit


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  *
23  * Free SoftwareFoundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.util;
31
32 /**
33  * Stub for java.util.concurrent.TimeUnit.
34  */
35 public class TimeUnit {
36   public static final TimeUnit NANOSECONDS = new TimeUnit(1L);
37   public static final TimeUnit MICROSECONDS = new TimeUnit(1000L);
38   public static final TimeUnit MILLISECONDS = new TimeUnit(1000000L);
39   public static final TimeUnit SECONDS = new TimeUnit(1000000000L);
40
41   private final long _nanos;
42
43   private TimeUnit(long nanos)
44   {
45     _nanos = nanos;
46   }
47
48   public long convert(long duration, TimeUnit unit)
49   {
50     long sourceNanos = unit._nanos;
51
52     if (sourceNanos <= _nanos)
53       return duration * (_nanos / sourceNanos);
54     else
55       return duration / (sourceNanos / _nanos);
56   }
57
58   public long toMillis(long duration)
59   {
60     long msNanos = 1000000L;
61
62     if (msNanos <= _nanos)
63       return duration * (_nanos / msNanos);
64     else
65       return duration / (msNanos / _nanos);
66   }
67 }
68
Popular Tags