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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 | |||||||||||||||
InfrastructureObjectProvider.java | 100% | 84.6% | 100% | 90.5% |
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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.services.impl; | |
16 | ||
17 | import java.util.HashMap; | |
18 | import java.util.Map; | |
19 | ||
20 | import org.apache.hivemind.ErrorLog; | |
21 | import org.apache.hivemind.Location; | |
22 | import org.apache.hivemind.internal.Module; | |
23 | import org.apache.hivemind.service.ObjectProvider; | |
24 | import org.apache.hivemind.util.PropertyUtils; | |
25 | import org.apache.tapestry.services.Infrastructure; | |
26 | ||
27 | /** | |
28 | * An ObjectProvider that streamlines access to the central | |
29 | * {@link org.apache.tapestry.services.Infrastructure}object. The locator for this provider is the | |
30 | * name of a property of the Infrastructure. | |
31 | * | |
32 | * @author Howard Lewis Ship | |
33 | * @since 4.0 | |
34 | */ | |
35 | ||
36 | public class InfrastructureObjectProvider implements ObjectProvider | |
37 | { | |
38 | private ErrorLog _errorLog; | |
39 | ||
40 | private Infrastructure _infrastructure; | |
41 | ||
42 | private Map _cache = new HashMap(); | |
43 | ||
44 | 1846 | public synchronized Object provideObject(Module contributingModule, Class propertyType, |
45 | String locator, Location location) | |
46 | { | |
47 | 1846 | Object result = _cache.get(locator); |
48 | ||
49 | 1846 | if (result == null) |
50 | { | |
51 | 826 | result = readProperty(locator, location); |
52 | 826 | _cache.put(locator, result); |
53 | } | |
54 | ||
55 | 1846 | return result; |
56 | } | |
57 | ||
58 | 826 | Object readProperty(String locator, Location location) |
59 | { | |
60 | 826 | try |
61 | { | |
62 | 826 | if (PropertyUtils.isReadable(_infrastructure, locator)) |
63 | 780 | return PropertyUtils.read(_infrastructure, locator); |
64 | ||
65 | 46 | return _infrastructure.getProperty(locator); |
66 | } | |
67 | catch (Throwable ex) | |
68 | { | |
69 | 0 | _errorLog.error(ImplMessages.unableToReadInfrastructureProperty( |
70 | locator, | |
71 | _infrastructure, | |
72 | ex), location, ex); | |
73 | ||
74 | 0 | return null; |
75 | } | |
76 | } | |
77 | ||
78 | 41 | public void setErrorLog(ErrorLog errorLog) |
79 | { | |
80 | 41 | _errorLog = errorLog; |
81 | } | |
82 | ||
83 | 42 | public void setInfrastructure(Infrastructure infrastructure) |
84 | { | |
85 | 42 | _infrastructure = infrastructure; |
86 | } | |
87 | ||
88 | } |
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