1 |
|
|
2 |
|
|
3 |
|
|
4 |
|
|
5 |
|
|
6 |
|
|
7 |
|
|
8 |
|
|
9 |
|
|
10 |
|
|
11 |
|
|
12 |
|
|
13 |
|
|
14 |
|
|
15 |
|
package org.apache.tapestry.listener; |
16 |
|
|
17 |
|
import org.apache.hivemind.ApplicationRuntimeException; |
18 |
|
import org.apache.hivemind.util.Defense; |
19 |
|
import org.apache.tapestry.IActionListener; |
20 |
|
|
21 |
|
import java.util.Collection; |
22 |
|
import java.util.Collections; |
23 |
|
import java.util.HashMap; |
24 |
|
import java.util.Map; |
25 |
|
|
26 |
|
|
27 |
|
|
28 |
|
|
29 |
|
|
30 |
|
public class ListenerMapImpl implements ListenerMap |
31 |
|
{ |
32 |
|
|
33 |
|
private final Object _target; |
34 |
|
|
35 |
|
|
36 |
|
|
37 |
|
|
38 |
|
|
39 |
|
|
40 |
|
private final Map _invokers; |
41 |
|
|
42 |
16 |
private final Map _listeners = new HashMap(); |
43 |
|
|
44 |
|
public ListenerMapImpl(Object target, Map invokers) |
45 |
16 |
{ |
46 |
16 |
Defense.notNull(target, "target"); |
47 |
16 |
Defense.notNull(invokers, "invokers"); |
48 |
|
|
49 |
16 |
_target = target; |
50 |
16 |
_invokers = invokers; |
51 |
16 |
} |
52 |
|
|
53 |
|
public boolean canProvideListener(String name) |
54 |
|
{ |
55 |
2 |
return _invokers.containsKey(name); |
56 |
|
} |
57 |
|
|
58 |
|
public synchronized IActionListener getListener(String name) |
59 |
|
{ |
60 |
15 |
IActionListener result = (IActionListener) _listeners.get(name); |
61 |
|
|
62 |
15 |
if (result == null) |
63 |
|
{ |
64 |
14 |
result = createListener(name); |
65 |
12 |
_listeners.put(name, result); |
66 |
|
} |
67 |
|
|
68 |
13 |
return result; |
69 |
|
} |
70 |
|
|
71 |
|
private IActionListener createListener(String name) |
72 |
|
{ |
73 |
14 |
ListenerMethodInvoker invoker = (ListenerMethodInvoker) _invokers.get(name); |
74 |
|
|
75 |
14 |
if (invoker == null) |
76 |
2 |
throw new ApplicationRuntimeException(ListenerMessages.objectMissingMethod(_target, name), |
77 |
|
_target, null, null); |
78 |
|
|
79 |
12 |
return new SyntheticListener(_target, invoker); |
80 |
|
} |
81 |
|
|
82 |
|
public Collection getListenerNames() |
83 |
|
{ |
84 |
2 |
return Collections.unmodifiableCollection(_invokers.keySet()); |
85 |
|
} |
86 |
|
} |