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1
11 package org.eclipse.jdt.internal.ui.search;
12
13 import org.eclipse.jface.text.Document;
14 import org.eclipse.jface.text.IDocument;
15
16 import org.eclipse.search.ui.NewSearchUI;
17
18 import org.eclipse.jdt.core.IClassFile;
19 import org.eclipse.jdt.core.ICompilationUnit;
20 import org.eclipse.jdt.core.IJavaElement;
21 import org.eclipse.jdt.core.ISourceReference;
22 import org.eclipse.jdt.core.JavaModelException;
23 import org.eclipse.jdt.core.dom.CompilationUnit;
24
25 import org.eclipse.jdt.internal.ui.JavaPlugin;
26 import org.eclipse.jdt.internal.ui.javaeditor.ASTProvider;
27
28 public abstract class FindOccurrencesEngine {
29
30 private IOccurrencesFinder fFinder;
31
32 private static class FindOccurencesClassFileEngine extends FindOccurrencesEngine {
33 private IClassFile fClassFile;
34
35 public FindOccurencesClassFileEngine(IClassFile file, IOccurrencesFinder finder) {
36 super(finder);
37 fClassFile= file;
38 }
39 protected CompilationUnit createAST() {
40 return JavaPlugin.getDefault().getASTProvider().getAST(fClassFile, ASTProvider.WAIT_YES, null);
41 }
42 protected IJavaElement getInput() {
43 return fClassFile;
44 }
45 protected ISourceReference getSourceReference() {
46 return fClassFile;
47 }
48 }
49
50 private static class FindOccurencesCUEngine extends FindOccurrencesEngine {
51 private ICompilationUnit fCUnit;
52
53 public FindOccurencesCUEngine(ICompilationUnit unit, IOccurrencesFinder finder) {
54 super(finder);
55 fCUnit= unit;
56 }
57 protected CompilationUnit createAST() {
58 return JavaPlugin.getDefault().getASTProvider().getAST(fCUnit, ASTProvider.WAIT_YES, null);
59 }
60 protected IJavaElement getInput() {
61 return fCUnit;
62 }
63 protected ISourceReference getSourceReference() {
64 return fCUnit;
65 }
66 }
67
68 protected FindOccurrencesEngine(IOccurrencesFinder finder) {
69 fFinder= finder;
70 }
71
72 public static FindOccurrencesEngine create(IJavaElement root, IOccurrencesFinder finder) {
73 if (root == null || finder == null)
74 return null;
75
76 ICompilationUnit unit= (ICompilationUnit)root.getAncestor(IJavaElement.COMPILATION_UNIT);
77 if (unit != null)
78 return new FindOccurencesCUEngine(unit, finder);
79 IClassFile cf= (IClassFile)root.getAncestor(IJavaElement.CLASS_FILE);
80 if (cf != null)
81 return new FindOccurencesClassFileEngine(cf, finder);
82 return null;
83 }
84
85 protected abstract CompilationUnit createAST();
86
87 protected abstract IJavaElement getInput();
88
89 protected abstract ISourceReference getSourceReference();
90
91 protected IOccurrencesFinder getOccurrencesFinder() {
92 return fFinder;
93 }
94
95 public String  run(int offset, int length) throws JavaModelException {
96 ISourceReference sr= getSourceReference();
97 if (sr.getSourceRange() == null) {
98 return SearchMessages.FindOccurrencesEngine_noSource_text;
99 }
100
101 final CompilationUnit root= createAST();
102 if (root == null) {
103 return SearchMessages.FindOccurrencesEngine_cannotParse_text;
104 }
105 String message= fFinder.initialize(root, offset, length);
106 if (message != null)
107 return message;
108
109 final IDocument document= new Document(getSourceReference().getSource());
110
111 performNewSearch(fFinder, document, getInput());
112 return null;
113 }
114
115 private void performNewSearch(IOccurrencesFinder finder, IDocument document, IJavaElement element) {
116 NewSearchUI.runQueryInBackground(new OccurrencesSearchQuery(finder, document, element));
117 }
118 }
119 |
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