|
|||||||||||||||||||
30 day Evaluation License registered to hlship@comcast.net Your 30 day evaluation period has expired. Please visit http://www.cenqua.com to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
FieldBeanInitializer.java | 0% | 0% | 0% | 0% |
|
1 | // Copyright 2004, 2005 The Apache Software Foundation | |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | // you may not use this file except in compliance with the License. | |
5 | // You may obtain a copy of the License at | |
6 | // | |
7 | // http://www.apache.org/licenses/LICENSE-2.0 | |
8 | // | |
9 | // Unless required by applicable law or agreed to in writing, software | |
10 | // distributed under the License is distributed on an "AS IS" BASIS, | |
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | // See the License for the specific language governing permissions and | |
13 | // limitations under the License. | |
14 | ||
15 | package org.apache.tapestry.bean; | |
16 | ||
17 | import java.lang.reflect.Field; | |
18 | ||
19 | import org.apache.hivemind.ApplicationRuntimeException; | |
20 | import org.apache.hivemind.ClassResolver; | |
21 | import org.apache.tapestry.IBeanProvider; | |
22 | import org.apache.tapestry.Tapestry; | |
23 | ||
24 | /** | |
25 | * Initializes a bean with the value of a public static field. | |
26 | * | |
27 | * @author Howard Lewis Ship | |
28 | * @since 1.0.8 | |
29 | * | |
30 | **/ | |
31 | ||
32 | public class FieldBeanInitializer extends AbstractBeanInitializer | |
33 | { | |
34 | protected String _fieldName; | |
35 | protected Object _fieldValue; | |
36 | private boolean _fieldResolved = false; | |
37 | ||
38 | 0 | public synchronized void setBeanProperty(IBeanProvider provider, Object bean) |
39 | { | |
40 | 0 | ClassResolver resolver = provider.getClassResolver(); |
41 | ||
42 | 0 | if (!_fieldResolved) |
43 | 0 | resolveField(resolver); |
44 | ||
45 | 0 | setBeanProperty(bean, _fieldValue); |
46 | } | |
47 | ||
48 | 0 | private void resolveField(ClassResolver resolver) |
49 | { | |
50 | 0 | if (_fieldResolved) |
51 | 0 | return; |
52 | ||
53 | // This is all copied out of of FieldBinding!! | |
54 | ||
55 | 0 | int dotx = _fieldName.lastIndexOf('.'); |
56 | ||
57 | 0 | if (dotx < 0) |
58 | 0 | throw new ApplicationRuntimeException( |
59 | Tapestry.format("invalid-field-name", _fieldName)); | |
60 | ||
61 | 0 | String className = _fieldName.substring(0, dotx); |
62 | 0 | String simpleFieldName = _fieldName.substring(dotx + 1); |
63 | ||
64 | // Simple class names are assumed to be in the java.lang package. | |
65 | ||
66 | 0 | if (className.indexOf('.') < 0) |
67 | 0 | className = "java.lang." + className; |
68 | ||
69 | 0 | Class targetClass = null; |
70 | ||
71 | 0 | try |
72 | { | |
73 | 0 | targetClass = resolver.findClass(className); |
74 | } | |
75 | catch (Throwable t) | |
76 | { | |
77 | 0 | throw new ApplicationRuntimeException( |
78 | Tapestry.format("unable-to-resolve-class", className), | |
79 | t); | |
80 | } | |
81 | ||
82 | 0 | Field field = null; |
83 | ||
84 | 0 | try |
85 | { | |
86 | 0 | field = targetClass.getField(simpleFieldName); |
87 | } | |
88 | catch (NoSuchFieldException ex) | |
89 | { | |
90 | 0 | throw new ApplicationRuntimeException( |
91 | Tapestry.format("field-not-defined", _fieldName), | |
92 | ex); | |
93 | } | |
94 | ||
95 | // Get the value of the field. null means look for it as a static | |
96 | // variable. | |
97 | ||
98 | 0 | try |
99 | { | |
100 | 0 | _fieldValue = field.get(null); |
101 | } | |
102 | catch (IllegalAccessException ex) | |
103 | { | |
104 | 0 | throw new ApplicationRuntimeException( |
105 | Tapestry.format("illegal-field-access", _fieldName), | |
106 | ex); | |
107 | } | |
108 | catch (NullPointerException ex) | |
109 | { | |
110 | 0 | throw new ApplicationRuntimeException( |
111 | Tapestry.format("field-is-instance", _fieldName), | |
112 | ex); | |
113 | } | |
114 | ||
115 | 0 | _fieldResolved = true; |
116 | } | |
117 | ||
118 | } |
|