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1
19 package org.netbeans.modules.java.hints.infrastructure;
20
21 import com.sun.source.tree.CompilationUnitTree;
22 import com.sun.source.tree.Tree;
23 import com.sun.source.tree.Tree.Kind;
24 import com.sun.source.util.TreePath;
25 import java.util.ArrayList  ;
26 import java.util.List ;
27 import java.util.Map ;
28 import org.netbeans.api.java.source.CompilationInfo;
29 import org.netbeans.api.java.source.support.CancellableTreePathScanner;
30 import org.netbeans.modules.java.editor.semantic.ScanningCancellableTask;
31 import org.netbeans.modules.java.hints.spi.TreeRule;
32 import org.netbeans.spi.editor.hints.ErrorDescription;
33 import org.netbeans.spi.editor.hints.HintsController;
34
35
39 public class HintsTask extends ScanningCancellableTask<CompilationInfo> {
40
41 public HintsTask() {
42 }
43
44 public void run(CompilationInfo info) throws Exception {
45 Map <Kind, List <TreeRule>> hints = RulesManager.getInstance().getHints();
46
47 if (hints.isEmpty()) {
48 return ;
49 }
50
51 List <ErrorDescription> result = new ArrayList <ErrorDescription>();
52
53 scan(new ScannerImpl(info, hints), info.getCompilationUnit(), result);
54
55 if (isCancelled())
56 return ;
57
58 HintsController.setErrors(info.getFileObject(), HintsTask.class.getName(), result);
59 }
60
61 private static final class ScannerImpl extends CancellableTreePathScanner<Void , List <ErrorDescription>> {
62
63 private CompilationInfo info;
64 private Map <Kind, List <TreeRule>> hints;
65
66 public ScannerImpl(CompilationInfo info, Map <Kind, List <TreeRule>> hints) {
67 this.info = info;
68 this.hints = hints;
69 }
70
71 private void runAndAdd(TreePath path, List <TreeRule> rules, List <ErrorDescription> d) {
72 if (rules != null) {
73 for (TreeRule tr : rules) {
74 if (isCanceled()) {
75 return ;
76 }
77 List <ErrorDescription> errors = tr.run(info, path);
78
79 if (errors != null) {
80 d.addAll(errors);
81 }
82 }
83 }
84 }
85
86 @Override
87 public Void scan(Tree tree, List <ErrorDescription> p) {
88 if (tree == null)
89 return null;
90
91 TreePath tp = new TreePath(getCurrentPath(), tree);
92 Kind k = tree.getKind();
93
94 runAndAdd(tp, hints.get(k), p);
95
96 if (isCanceled()) {
97 return null;
98 }
99
100 return super.scan(tree, p);
101 }
102
103 @Override
104 public Void scan(TreePath path, List <ErrorDescription> p) {
105 Kind k = path.getLeaf().getKind();
106 runAndAdd(path, hints.get(k), p);
107
108 if (isCanceled()) {
109 return null;
110 }
111
112 return super.scan(path, p);
113 }
114
115 }
116
117 }
118 |
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