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Java > Open Source Codes > org > apache > tapestry > enhance > DispatchToInjectWorker


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.util.Iterator JavaDoc;
18 import java.util.Map JavaDoc;
19
20 import org.apache.hivemind.ErrorLog;
21 import org.apache.tapestry.spec.IComponentSpecification;
22 import org.apache.tapestry.spec.InjectSpecification;
23
24 /**
25  * Iterates over the {@link org.apache.tapestry.spec.InjectSpecification}s and locates and
26  * delegates to a {@link org.apache.tapestry.enhance.InjectEnhancementWorker} for each one.
27  *
28  * @author Howard M. Lewis Ship
29  * @since 4.0
30  */
31 public class DispatchToInjectWorker implements EnhancementWorker
32 {
33     private ErrorLog _errorLog;
34
35     private Map JavaDoc _injectWorkers;
36
37     public void performEnhancement(EnhancementOperation op, IComponentSpecification spec)
38     {
39         Iterator JavaDoc i = spec.getInjectSpecifications().iterator();
40
41         while (i.hasNext())
42         {
43             InjectSpecification is = (InjectSpecification) i.next();
44
45             invokeWorker(op, is);
46         }
47     }
48
49     private void invokeWorker(EnhancementOperation op, InjectSpecification spec)
50     {
51         try
52         {
53             InjectEnhancementWorker worker = (InjectEnhancementWorker) _injectWorkers.get(spec
54                     .getType());
55
56             if (worker == null)
57             {
58                 _errorLog.error(EnhanceMessages.unknownInjectType(spec.getProperty(), spec
59                         .getType()), spec.getLocation(), null);
60                 return;
61             }
62
63             worker.performEnhancement(op, spec);
64
65         }
66         catch (Exception JavaDoc ex)
67         {
68             _errorLog.error(EnhanceMessages.errorAddingProperty(spec.getProperty(), op
69                     .getBaseClass(), ex), spec.getLocation(), ex);
70         }
71     }
72
73     public void setErrorLog(ErrorLog errorLog)
74     {
75         _errorLog = errorLog;
76     }
77
78     public void setInjectWorkers(Map JavaDoc injectWorkers)
79     {
80         _injectWorkers = injectWorkers;
81     }
82 }
83
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