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1 package org.shiftone.cache.util;
2
3
4
5 import java.util.ArrayList  ;
6 import java.util.Iterator ;
7 import java.util.List ;
8 import java.util.Set ;
9
10
11
15 public class WeakSet
16 {
17
18 private static final Log LOG = new Log(WeakSet.class);
19 private WeakMap weakMap = new WeakMap();
20 private int count = 0;
21
22 public int size()
23 {
24 return weakMap.size();
25 }
26
27
28 public boolean isEmpty()
29 {
30 return weakMap.isEmpty();
31 }
32
33
34 public void add(Object obj)
35 {
36 weakMap.put(new Integer (count++), obj);
37 }
38
39
40 public void clear()
41 {
42 weakMap.clear();
43 }
44
45
46 public Iterator iterator()
47 {
48
49 List list = new ArrayList ();
50 Set keys = weakMap.keySet();
51 Iterator iterator = keys.iterator();
52
53 while (iterator.hasNext())
54 {
55 Object key = iterator.next();
56 Object value = weakMap.get(key);
57
58 if (value != null)
59 {
60 list.add(value);
61 }
62 }
63
64 return list.iterator();
65 }
66 }
67 |
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