Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
TypeConverterWrapper |
|
| 2.25;2.25 |
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.coerce; | |
16 | ||
17 | import java.util.Iterator; | |
18 | import java.util.List; | |
19 | ||
20 | import org.apache.hivemind.lib.util.StrategyRegistry; | |
21 | import org.apache.hivemind.lib.util.StrategyRegistryImpl; | |
22 | ||
23 | /** | |
24 | * A service implementation that works around an | |
25 | * {@link org.apache.hivemind.lib.util.StrategyRegistry}. The registry is contructed from a | |
26 | * configuration that follows the <code>tapestry.coerce.Converters</code> schema (a List of | |
27 | * {@link org.apache.tapestry.coerce.TypeConverterContribution}plus an additional converter for | |
28 | * nulls. | |
29 | * | |
30 | * @author Howard M. Lewis Ship | |
31 | * @since 4.0 | |
32 | */ | |
33 | 0 | public final class TypeConverterWrapper implements TypeConverter |
34 | { | |
35 | 0 | private StrategyRegistry _registry = new StrategyRegistryImpl(); |
36 | ||
37 | private List _contributions; | |
38 | ||
39 | private TypeConverter _nullConverter; | |
40 | ||
41 | public void initializeService() | |
42 | { | |
43 | 0 | Iterator i = _contributions.iterator(); |
44 | ||
45 | 0 | while (i.hasNext()) |
46 | { | |
47 | 0 | TypeConverterContribution c = (TypeConverterContribution) i.next(); |
48 | ||
49 | 0 | _registry.register(c.getSubjectClass(), c.getConverter()); |
50 | 0 | } |
51 | 0 | } |
52 | ||
53 | public Object convertValue(Object value) | |
54 | { | |
55 | 0 | if (value == null) |
56 | { | |
57 | 0 | if (_nullConverter == null) |
58 | 0 | return null; |
59 | ||
60 | 0 | return _nullConverter.convertValue(null); |
61 | } | |
62 | ||
63 | 0 | TypeConverter delegate = (TypeConverter) _registry.getStrategy(value.getClass()); |
64 | ||
65 | 0 | return delegate.convertValue(value); |
66 | } | |
67 | ||
68 | /** | |
69 | * Sets the List of {@link org.apache.tapestry.coerce.TypeConverterContribution}s. | |
70 | */ | |
71 | ||
72 | public void setContributions(List contributions) | |
73 | { | |
74 | 0 | _contributions = contributions; |
75 | 0 | } |
76 | ||
77 | /** | |
78 | * Sets the converter used to convert null. | |
79 | */ | |
80 | ||
81 | public void setNullConverter(TypeConverter nullConverter) | |
82 | { | |
83 | 0 | _nullConverter = nullConverter; |
84 | 0 | } |
85 | } |