Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
BeanBinding |
|
| 1.0;1 |
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.binding; | |
16 | ||
17 | import org.apache.hivemind.Location; | |
18 | import org.apache.hivemind.util.Defense; | |
19 | import org.apache.tapestry.IComponent; | |
20 | import org.apache.tapestry.coerce.ValueConverter; | |
21 | ||
22 | /** | |
23 | * Binding whose value is a named bean provided by a component. | |
24 | * | |
25 | * @author Howard M. Lewis Ship | |
26 | * @since 4.0 | |
27 | */ | |
28 | public class BeanBinding extends AbstractBinding | |
29 | { | |
30 | private final IComponent _component; | |
31 | ||
32 | private final String _beanName; | |
33 | ||
34 | public BeanBinding(String description, ValueConverter valueConverter, Location location, | |
35 | IComponent component, String beanName) | |
36 | { | |
37 | 0 | super(description, valueConverter, location); |
38 | ||
39 | 0 | Defense.notNull(component, "component"); |
40 | 0 | Defense.notNull(beanName, "beanName"); |
41 | ||
42 | 0 | _component = component; |
43 | 0 | _beanName = beanName; |
44 | 0 | } |
45 | ||
46 | /** | |
47 | * Beans obtained via the binding should *not* be cached by the component because beans may be | |
48 | * discarded inside the {@link org.apache.tapestry.bean.BeanProvider} based on the life cycle of | |
49 | * the bean. The BeanProvider caches beans as well. | |
50 | */ | |
51 | ||
52 | public boolean isInvariant() | |
53 | { | |
54 | 0 | return false; |
55 | } | |
56 | ||
57 | public Object getComponent() | |
58 | { | |
59 | 0 | return _component; |
60 | } | |
61 | ||
62 | public Object getObject() | |
63 | { | |
64 | 0 | return _component.getBeans().getBean(_beanName); |
65 | } | |
66 | ||
67 | } |