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Java > Open Source Codes > net > jforum > util > concurrent > executor > ReadyResult


1 /*
2  * Copyright (c) 2003, Rafael Steil
3  * All rights reserved.
4
5  * Redistribution and use in source and binary forms,
6  * with or without modification, are permitted provided
7  * that the following conditions are met:
8
9  * 1) Redistributions of source code must retain the above
10  * copyright notice, this list of conditions and the
11  * following disclaimer.
12  * 2) Redistributions in binary form must reproduce the
13  * above copyright notice, this list of conditions and
14  * the following disclaimer in the documentation and/or
15  * other materials provided with the distribution.
16  * 3) Neither the name of "Rafael Steil" nor
17  * the names of its contributors may be used to endorse
18  * or promote products derived from this software without
19  * specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
22  * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
24  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
27  * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
32  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
33  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
34  * IN CONTRACT, STRICT LIABILITY, OR TORT
35  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
36  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
37  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
38  *
39  * This file creation date: Jan 28, 2004
40  * net.jforum.util.concurrent.executor.ReadyResult.java
41  * The JForum Project
42  * http://www.jforum.net
43  *
44  * $Id: ReadyResult.java,v 1.4 2005/07/26 03:05:59 rafaelsteil Exp $
45  */
46 package net.jforum.util.concurrent.executor;
47
48 import net.jforum.util.concurrent.Result;
49
50 /**
51  * @author Rodrigo Kumpera
52  */
53 class ReadyResult implements Result
54 {
55     final Object JavaDoc result;
56     final Exception JavaDoc exception;
57
58     public ReadyResult(final Object JavaDoc result, final Exception JavaDoc exception)
59     {
60         this.result = result;
61         this.exception = exception;
62     }
63
64     public boolean hasThrown() throws IllegalStateException JavaDoc
65     {
66         return exception != null;
67     }
68
69     public Object JavaDoc getResult() throws IllegalStateException JavaDoc
70     {
71         if(hasThrown()) {
72             throw new IllegalStateException JavaDoc("task has thrown an exception");
73         }
74         
75         return result;
76     }
77
78     public Exception JavaDoc getException() throws IllegalStateException JavaDoc
79     {
80         if(!hasThrown()) {
81             throw new IllegalStateException JavaDoc("task has not thrown an exception");
82         }
83             
84         return exception;
85     }
86
87     public void waitResult() throws InterruptedException JavaDoc
88     {
89         if(Thread.interrupted()) {
90             throw new InterruptedException JavaDoc();
91         }
92     }
93
94     public boolean poolResult(long timeout) throws InterruptedException JavaDoc
95     {
96         if(Thread.interrupted()) {
97             throw new InterruptedException JavaDoc();
98         }
99
100         return true;
101     }
102 }
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