blob: 03215bc149d93fa9c77199abb4b2fadb5d9bd4f8 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Simon McDuff - initial API and implementation
**************************************************************************/
package org.eclipse.emf.cdo.common.util;
/**
* @author Simon McDuff
* @since 2.0
*/
public class PropertyChanged<T>
{
Object notifier = new Object();
T value;
RuntimeException exception = null;
public PropertyChanged(T value)
{
this.value = value;
}
public T get()
{
return value;
}
public void set(T newValue)
{
synchronized (notifier)
{
value = newValue;
notifier.notifyAll();
}
}
public void setException(RuntimeException exception)
{
synchronized (notifier)
{
this.exception = exception;
notifier.notifyAll();
}
}
public void acquire(Object accept, Object refuse)
{
acquire(accept, refuse, 0);
}
public void acquire(Object accept, Object refuse, long timeout)
{
synchronized (notifier)
{
while (!equalToOneElement(accept, refuse))
{
try
{
notifier.wait(timeout);
}
catch (InterruptedException ex)
{
Thread.currentThread().interrupt();
}
}
}
}
private boolean equalToOneElement(Object accept, Object refuse)
{
if (this.exception != null) throw this.exception;
if (accept != null && accept.equals(value)) return true;
if (refuse != null && refuse.equals(value)) throw new IllegalStateException();
return false;
}
}
|
