1 | |
|
2 | |
|
3 | |
|
4 | |
|
5 | |
|
6 | |
|
7 | |
|
8 | |
|
9 | |
|
10 | |
|
11 | |
|
12 | |
|
13 | |
|
14 | |
|
15 | |
package org.apache.tapestry.binding; |
16 | |
|
17 | |
import org.apache.hivemind.ApplicationRuntimeException; |
18 | |
import org.apache.hivemind.Location; |
19 | |
import org.apache.hivemind.util.Defense; |
20 | |
import org.apache.tapestry.coerce.ValueConverter; |
21 | |
import org.apache.tapestry.engine.state.ApplicationStateManager; |
22 | |
|
23 | |
|
24 | |
|
25 | |
|
26 | |
|
27 | |
|
28 | |
|
29 | |
|
30 | |
public class StateBinding extends AbstractBinding |
31 | |
{ |
32 | |
private final ApplicationStateManager _applicationStateManager; |
33 | |
|
34 | |
private final String _objectName; |
35 | |
|
36 | |
public StateBinding(String description, ValueConverter valueConverter, Location location, |
37 | |
ApplicationStateManager applicationStateManager, String objectName) |
38 | |
{ |
39 | 0 | super(description, valueConverter, location); |
40 | |
|
41 | 0 | Defense.notNull(applicationStateManager, "applicationStateManager"); |
42 | 0 | Defense.notNull(objectName, "objectName"); |
43 | |
|
44 | 0 | _applicationStateManager = applicationStateManager; |
45 | 0 | _objectName = objectName; |
46 | 0 | } |
47 | |
|
48 | |
|
49 | |
|
50 | |
|
51 | |
public boolean isInvariant() |
52 | |
{ |
53 | 0 | return false; |
54 | |
} |
55 | |
|
56 | |
public Object getObject() |
57 | |
{ |
58 | |
try |
59 | |
{ |
60 | 0 | boolean exists = _applicationStateManager.exists(_objectName); |
61 | |
|
62 | 0 | return exists ? Boolean.TRUE : Boolean.FALSE; |
63 | |
} |
64 | 0 | catch (Exception ex) |
65 | |
{ |
66 | 0 | throw new ApplicationRuntimeException(ex.getMessage(), getLocation(), ex); |
67 | |
} |
68 | |
} |
69 | |
} |