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Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
EnhancedClassValidatorImpl.java | 100% | 100% | 100% | 100% |
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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.enhance; | |
16 | ||
17 | import java.lang.reflect.Method; | |
18 | import java.lang.reflect.Modifier; | |
19 | import java.util.HashSet; | |
20 | import java.util.Set; | |
21 | ||
22 | import org.apache.hivemind.ErrorLog; | |
23 | import org.apache.hivemind.service.MethodSignature; | |
24 | import org.apache.tapestry.spec.IComponentSpecification; | |
25 | ||
26 | /** | |
27 | * Validates that an enhanced class is correct; checks that all inherited abstract methods are, in | |
28 | * fact, implemented in the class. | |
29 | * | |
30 | * @author Howard M. Lewis Ship | |
31 | * @since 4.0 | |
32 | */ | |
33 | public class EnhancedClassValidatorImpl implements EnhancedClassValidator | |
34 | { | |
35 | private ErrorLog _errorLog; | |
36 | ||
37 | 421 | public void validate(Class baseClass, Class enhancedClass, IComponentSpecification specification) |
38 | { | |
39 | 421 | Set implementedMethods = new HashSet(); |
40 | ||
41 | 421 | Class current = enhancedClass; |
42 | ||
43 | 421 | while (true) |
44 | { | |
45 | 1165 | Method[] methods = current.getDeclaredMethods(); |
46 | ||
47 | 1165 | for (int i = 0; i < methods.length; i++) |
48 | { | |
49 | 22309 | Method m = methods[i]; |
50 | ||
51 | 22309 | boolean isAbstract = Modifier.isAbstract(m.getModifiers()); |
52 | ||
53 | 22309 | MethodSignature s = new MethodSignature(m); |
54 | ||
55 | 22309 | if (isAbstract) |
56 | { | |
57 | 2139 | if (implementedMethods.contains(s)) |
58 | 2138 | continue; |
59 | ||
60 | 1 | _errorLog.error(EnhanceMessages.noImplForAbstractMethod(m, current, baseClass |
61 | .getName(), enhancedClass), specification.getLocation(), null); | |
62 | } | |
63 | ||
64 | 20171 | implementedMethods.add(s); |
65 | } | |
66 | ||
67 | // An earlier version of this code walked the interfaces directly, | |
68 | // but it appears that implementing an interface actually | |
69 | // puts abstract method declarations into the class | |
70 | // (at least, in terms of what getDeclaredMethods() returns). | |
71 | ||
72 | // March up to the super class. | |
73 | ||
74 | 1165 | current = current.getSuperclass(); |
75 | ||
76 | // Once advanced up to a concrete class, we trust that | |
77 | // the compiler did its checking. Alternately, if | |
78 | // we started on java.lang.Object for some reason, current | |
79 | // will be null and we can stop.S | |
80 | ||
81 | 1165 | if (current == null || !Modifier.isAbstract(current.getModifiers())) |
82 | 421 | break; |
83 | } | |
84 | ||
85 | } | |
86 | ||
87 | 42 | public void setErrorLog(ErrorLog errorLog) |
88 | { | |
89 | 42 | _errorLog = errorLog; |
90 | } | |
91 | } |
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