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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2011 IBM Corporation and others. | |
3 | * All rights reserved. This program and the accompanying materials | |
4 | * are made available under the terms of the Eclipse Public License v1.0 | |
5 | * which accompanies this distribution, and is available at | |
6 | * http://www.eclipse.org/legal/epl-v10.html | |
7 | * | |
8 | * Contributors: | |
9 | * IBM Corporation - initial API and implementation | |
10 | *******************************************************************************/ | |
11 | package org.eclipse.jdt.internal.corext.refactoring.code; | |
12 | ||
13 | import java.util.ArrayList; | |
14 | import java.util.Iterator; | |
15 | import java.util.List; | |
16 | ||
17 | import org.eclipse.ltk.core.refactoring.RefactoringStatus; | |
18 | ||
19 | import org.eclipse.jdt.core.dom.ASTVisitor; | |
20 | import org.eclipse.jdt.core.dom.AbstractTypeDeclaration; | |
21 | import org.eclipse.jdt.core.dom.AnnotationTypeDeclaration; | |
22 | import org.eclipse.jdt.core.dom.BodyDeclaration; | |
23 | import org.eclipse.jdt.core.dom.EnumDeclaration; | |
24 | import org.eclipse.jdt.core.dom.IBinding; | |
25 | import org.eclipse.jdt.core.dom.ITypeBinding; | |
26 | import org.eclipse.jdt.core.dom.SimpleName; | |
27 | import org.eclipse.jdt.core.dom.TypeDeclaration; | |
28 | ||
29 | import org.eclipse.jdt.internal.corext.dom.Selection; | |
30 | import org.eclipse.jdt.internal.corext.refactoring.RefactoringCoreMessages; | |
31 | ||
32 | public class LocalTypeAnalyzer extends ASTVisitor { | |
33 | ||
34 | private Selection fSelection; | |
35 | private List<AbstractTypeDeclaration> fTypeDeclarationsBefore= new ArrayList<AbstractTypeDeclaration>(2); | |
36 | private List<AbstractTypeDeclaration> fTypeDeclarationsSelected= new ArrayList<AbstractTypeDeclaration>(2); | |
37 | private String fBeforeTypeReferenced; | |
38 | private String fSelectedTypeReferenced; | |
39 | ||
40 | //---- Analyzing statements ---------------------------------------------------------------- | |
41 | ||
42 | public static RefactoringStatus perform(BodyDeclaration declaration, Selection selection) { | |
43 | LocalTypeAnalyzer analyzer= new LocalTypeAnalyzer(selection); | |
44 | declaration.accept(analyzer); | |
45 | RefactoringStatus result= new RefactoringStatus(); | |
46 | analyzer.check(result); | |
47 | return result; | |
48 | } | |
49 | ||
50 | private LocalTypeAnalyzer(Selection selection) { | |
51 | fSelection= selection; | |
52 | } | |
53 | ||
54 | @Override | |
55 | public boolean visit(SimpleName node) { | |
56 | if (node.isDeclaration()) | |
57 | return true; | |
58 | IBinding binding= node.resolveBinding(); | |
59 | if (binding instanceof ITypeBinding) | |
60 | processLocalTypeBinding((ITypeBinding) binding, fSelection.getVisitSelectionMode(node)); | |
61 | ||
62 | return true; | |
63 | } | |
64 | ||
65 | @Override | |
66 | public boolean visit(TypeDeclaration node) { | |
67 | return visitType(node); | |
68 | } | |
69 | ||
70 | @Override | |
71 | public boolean visit(AnnotationTypeDeclaration node) { | |
72 | return visitType(node); | |
73 | } | |
74 | ||
75 | @Override | |
76 | public boolean visit(EnumDeclaration node) { | |
77 | return visitType(node); | |
78 | } | |
79 | ||
80 | private boolean visitType(AbstractTypeDeclaration node) { | |
81 | int mode= fSelection.getVisitSelectionMode(node); | |
82 | switch (mode) { | |
83 | case Selection.BEFORE: | |
84 | fTypeDeclarationsBefore.add(node); | |
85 | break; | |
86 | case Selection.SELECTED: | |
87 | fTypeDeclarationsSelected.add(node); | |
88 | break; | |
89 | } | |
90 | return true; | |
91 | } | |
92 | ||
93 | private void processLocalTypeBinding(ITypeBinding binding, int mode) { | |
94 | switch (mode) { | |
95 | case Selection.SELECTED: | |
96 | if (fBeforeTypeReferenced != null) | |
97 | break; | |
98 | if (checkBinding(fTypeDeclarationsBefore, binding)) | |
99 | fBeforeTypeReferenced= RefactoringCoreMessages.LocalTypeAnalyzer_local_type_from_outside; | |
100 | break; | |
101 | case Selection.AFTER: | |
102 | if (fSelectedTypeReferenced != null) | |
103 | break; | |
104 | if (checkBinding(fTypeDeclarationsSelected, binding)) | |
105 | fSelectedTypeReferenced= RefactoringCoreMessages.LocalTypeAnalyzer_local_type_referenced_outside; | |
106 | break; | |
107 | } | |
108 | } | |
109 | ||
110 | private boolean checkBinding(List<AbstractTypeDeclaration> declarations, ITypeBinding binding) { | |
111 | for (Iterator<AbstractTypeDeclaration> iter= declarations.iterator(); iter.hasNext();) { | |
112 | AbstractTypeDeclaration declaration= iter.next(); | |
113 | if (declaration.resolveBinding() == binding) { | |
114 | return true; | |
115 | } | |
116 | } | |
117 | return false; | |
118 | } | |
119 | ||
120 | private void check(RefactoringStatus status) { | |
121 | if (fBeforeTypeReferenced != null) | |
122 | status.addFatalError(fBeforeTypeReferenced); | |
123 | if (fSelectedTypeReferenced != null) | |
124 | status.addFatalError(fSelectedTypeReferenced); | |
125 | } | |
126 | } |