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comparison src/org/eclipse/jetty/util/ConcurrentHashSet.java @ 802:3428c60d7cfc

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replace jetty jars with source
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 21:15:48 -0600
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801:6a21393191c1 802:3428c60d7cfc
1 //
2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.util;
20
21 import java.util.AbstractSet;
22 import java.util.Collection;
23 import java.util.Iterator;
24 import java.util.Map;
25 import java.util.Set;
26 import java.util.concurrent.ConcurrentHashMap;
27
28 public class ConcurrentHashSet<E> extends AbstractSet<E> implements Set<E>
29 {
30 private final Map<E, Boolean> _map = new ConcurrentHashMap<E, Boolean>();
31 private transient Set<E> _keys = _map.keySet();
32
33 public ConcurrentHashSet()
34 {
35 }
36
37 @Override
38 public boolean add(E e)
39 {
40 return _map.put(e,Boolean.TRUE) == null;
41 }
42
43 @Override
44 public void clear()
45 {
46 _map.clear();
47 }
48
49 @Override
50 public boolean contains(Object o)
51 {
52 return _map.containsKey(o);
53 }
54
55 @Override
56 public boolean containsAll(Collection<?> c)
57 {
58 return _keys.containsAll(c);
59 }
60
61 @Override
62 public boolean equals(Object o)
63 {
64 return o == this || _keys.equals(o);
65 }
66
67 @Override
68 public int hashCode()
69 {
70 return _keys.hashCode();
71 }
72
73 @Override
74 public boolean isEmpty()
75 {
76 return _map.isEmpty();
77 }
78
79 @Override
80 public Iterator<E> iterator()
81 {
82 return _keys.iterator();
83 }
84
85 @Override
86 public boolean remove(Object o)
87 {
88 return _map.remove(o) != null;
89 }
90
91 @Override
92 public boolean removeAll(Collection<?> c)
93 {
94 return _keys.removeAll(c);
95 }
96
97 @Override
98 public boolean retainAll(Collection<?> c)
99 {
100 return _keys.retainAll(c);
101 }
102
103 @Override
104 public int size()
105 {
106 return _map.size();
107 }
108
109 @Override
110 public Object[] toArray()
111 {
112 return _keys.toArray();
113 }
114
115 @Override
116 public <T> T[] toArray(T[] a)
117 {
118 return _keys.toArray(a);
119 }
120
121 @Override
122 public String toString()
123 {
124 return _keys.toString();
125 }
126 }