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Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
InjectMessagesWorker.java | - | 100% | 100% | 100% |
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1 | // Copyright 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.enhance; | |
16 | ||
17 | import java.lang.reflect.Modifier; | |
18 | ||
19 | import org.apache.hivemind.ErrorLog; | |
20 | import org.apache.hivemind.Messages; | |
21 | import org.apache.hivemind.service.BodyBuilder; | |
22 | import org.apache.hivemind.service.MethodSignature; | |
23 | import org.apache.hivemind.util.Defense; | |
24 | import org.apache.tapestry.services.ComponentMessagesSource; | |
25 | import org.apache.tapestry.spec.IComponentSpecification; | |
26 | ||
27 | /** | |
28 | * Injects the read-only {@link org.apache.tapestry.IComponent#getMessages() messages}property into | |
29 | * all components. | |
30 | * | |
31 | * @author Howard M. Lewis Ship | |
32 | * @since 4.0 | |
33 | */ | |
34 | public class InjectMessagesWorker implements EnhancementWorker | |
35 | { | |
36 | final String MESSAGES_PROPERTY = "messages"; | |
37 | ||
38 | private ErrorLog _errorLog; | |
39 | ||
40 | private ComponentMessagesSource _componentMessagesSource; | |
41 | ||
42 | final MethodSignature METHOD_SIGNATURE = new MethodSignature(Messages.class, "getMessages", | |
43 | null, null); | |
44 | ||
45 | 436 | public void performEnhancement(EnhancementOperation op, IComponentSpecification spec) |
46 | { | |
47 | 436 | try |
48 | { | |
49 | 436 | injectMessages(op); |
50 | } | |
51 | catch (Exception ex) | |
52 | { | |
53 | 1 | _errorLog.error(EnhanceMessages.errorAddingProperty(MESSAGES_PROPERTY, op |
54 | .getBaseClass(), ex), null, ex); | |
55 | } | |
56 | } | |
57 | ||
58 | 436 | public void injectMessages(EnhancementOperation op) |
59 | { | |
60 | 436 | Defense.notNull(op, "op"); |
61 | ||
62 | 436 | op.claimProperty(MESSAGES_PROPERTY); |
63 | ||
64 | 435 | String sourceField = op.addInjectedField( |
65 | "_$componentMessagesSource", | |
66 | ComponentMessagesSource.class, | |
67 | _componentMessagesSource); | |
68 | ||
69 | 435 | op.addField("_$messages", Messages.class); |
70 | ||
71 | 435 | BodyBuilder builder = new BodyBuilder(); |
72 | 435 | builder.begin(); |
73 | 435 | builder.addln("if (_$messages == null)"); |
74 | 435 | builder.addln(" _$messages = {0}.getMessages(this);", sourceField); |
75 | 435 | builder.addln("return _$messages;"); |
76 | 435 | builder.end(); |
77 | ||
78 | 435 | op.addMethod(Modifier.PUBLIC, METHOD_SIGNATURE, builder.toString()); |
79 | } | |
80 | ||
81 | 58 | public void setComponentMessagesSource(ComponentMessagesSource componentMessagesSource) |
82 | { | |
83 | 58 | _componentMessagesSource = componentMessagesSource; |
84 | } | |
85 | ||
86 | 42 | public void setErrorLog(ErrorLog errorLog) |
87 | { | |
88 | 42 | _errorLog = errorLog; |
89 | } | |
90 | } |
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