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1
7
8 package org.jboss.media.util.registry;
9
10 import java.util.Collections  ;
11 import java.util.HashMap ;
12 import java.util.Iterator ;
13 import java.util.Map ;
14
15 import org.jboss.logging.Logger;
16
17
23 public class MapRegistry implements Registry
24 {
25 private static final Logger log = Logger.getLogger(MapRegistry.class);
26
27 private static final Map entries =
28 Collections.synchronizedMap(new HashMap ());
29
30 public MapRegistry()
31 {
32 }
33
34 public MapRegistry(Map initialEntries) throws ObjectAlreadyBoundException
35 {
36 this();
37
38 Iterator keys = initialEntries.keySet().iterator();
39
40 while (keys.hasNext())
41 {
42 Object key = keys.next();
43 Object value = initialEntries.get(key);
44 bind(key, value);
45 }
46 }
47
48 public void bind(final Object key, final Object value)
49 throws ObjectAlreadyBoundException
50 {
51 if (key == null || value == null)
52 {
53 throw new NullPointerException ();
54 }
55
56 if (entries.containsKey(key))
57 {
58 throw new ObjectAlreadyBoundException();
59 }
60
61 entries.put(key, value);
62
63 if (log.isTraceEnabled())
64 log.trace("bound " + key + "=" + value);
65 }
66
67 public void rebind(final Object key, final Object value)
68 {
69 if (key == null || value == null)
70 {
71 throw new NullPointerException ();
72 }
73
74 entries.put(key, value);
75
76 if (log.isTraceEnabled())
77 log.trace("rebind " + key + "=" + value);
78 }
79
80 public Object unbind(final Object key) throws ObjectNotBoundException
81 {
82 if (key == null)
83 {
84 throw new NullPointerException ();
85 }
86
87 if (!entries.containsKey(key))
88 {
89 throw new ObjectNotBoundException();
90 }
91
92 Object object = entries.remove(key);
93
94 if (log.isTraceEnabled())
95 log.trace("unbound " + key + "=" + object);
96
97 return object;
98 }
99
100 public Object lookup(final Object key) throws ObjectNotBoundException
101 {
102 if (!entries.containsKey(key))
103 {
104 throw new ObjectNotBoundException();
105 }
106
107 Object object = entries.get(key);
108
109 if (log.isTraceEnabled())
110 log.trace("lookup " + key + "=" + object);
111
112 return object;
113 }
114
115 public Iterator keyIterator()
116 {
117 synchronized (entries)
118 {
119 return entries.keySet().iterator();
120 }
121 }
122 }
123 |
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