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
|
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
package com.sun.star.lib.util;
import org.junit.Test;
import util.WaitUnreachable;
import static org.junit.Assert.*;
public final class WeakMap_Test {
@Test public void test() {
WeakMap<String,Object> m = new WeakMap<String,Object>();
assertEquals(0, m.size());
assertTrue(m.isEmpty());
assertFalse(m.containsKey("key1"));
assertFalse(m.containsValue(null));
WaitUnreachable u1 = new WaitUnreachable(new Object());
m.put("key1", u1.get());
WaitUnreachable u2 = new WaitUnreachable(new Disposable());
m.put("key2", u2.get());
assertEquals(2, m.size());
assertFalse(m.isEmpty());
assertTrue(m.containsKey("key1"));
assertTrue(m.containsKey("key2"));
assertFalse(m.containsKey("key3"));
assertTrue(m.containsValue(m.get("key1")));
assertTrue(m.containsValue(m.get("key2")));
assertEquals(u1.get(), WeakMap.getValue(m.get("key1")));
assertEquals(u2.get(), WeakMap.getValue(m.get("key2")));
assertEquals(2, m.values().size());
assertTrue(m.values().contains(m.get("key1")));
assertTrue(m.values().contains(m.get("key2")));
u1.waitUnreachable();
assertNull(WeakMap.getValue(m.get("key1")));
((Disposable) u2.get()).dispose();
assertNull(WeakMap.getValue(m.get("key2")));
m.clear();
u2.waitUnreachable();
assertEquals(0, m.size());
m.put("key2", new Object());
assertEquals(1, m.size());
}
// This simple class (single listener, no synchronization) exploits
// knowledge about the implementation of WeakMap:
private static final class Disposable implements DisposeNotifier {
public void addDisposeListener(DisposeListener listener) {
this.listener = listener;
}
public void dispose() {
if (listener != null) {
listener.notifyDispose(this);
}
}
private DisposeListener listener = null;
}
}
|
