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 | 1 | super(description, valueConverter, location); |
38 | ||
39 | 1 | Defense.notNull(component, "component"); |
40 | 1 | Defense.notNull(beanName, "beanName"); |
41 | ||
42 | 1 | _component = component; |
43 | 1 | _beanName = beanName; |
44 | 1 | } |
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 | 1 | return _component; |
60 | } |
|
61 | ||
62 | public Object getObject() |
|
63 | { |
|
64 | 1 | return _component.getBeans().getBean(_beanName); |
65 | } |
|
66 | ||
67 | } |