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1
4 package net.sourceforge.pmd.rules.imports;
5
6 import net.sourceforge.pmd.AbstractRule;
7 import net.sourceforge.pmd.ast.ASTClassOrInterfaceType;
8 import net.sourceforge.pmd.ast.ASTCompilationUnit;
9 import net.sourceforge.pmd.ast.ASTImportDeclaration;
10 import net.sourceforge.pmd.ast.ASTName;
11 import net.sourceforge.pmd.ast.SimpleJavaNode;
12 import net.sourceforge.pmd.ast.SimpleNode;
13 import net.sourceforge.pmd.rules.ImportWrapper;
14
15 import java.util.HashSet  ;
16 import java.util.Iterator ;
17 import java.util.Set ;
18
19 public class UnusedImportsRule extends AbstractRule {
20
21 private Set imports = new HashSet ();
22
23 public Object visit(ASTCompilationUnit node, Object data) {
24 imports.clear();
25 super.visit(node, data);
26 for (Iterator i = imports.iterator(); i.hasNext();) {
27 ImportWrapper wrapper = (ImportWrapper) i.next();
28 addViolation(data, wrapper.getNode(), wrapper.getFullName());
29 }
30 return data;
31 }
32
33 public Object visit(ASTImportDeclaration node, Object data) {
34 if (!node.isImportOnDemand()) {
35 ASTName importedType = (ASTName) node.jjtGetChild(0);
36 String className;
37 if (isQualifiedName(importedType)) {
38 int lastDot = importedType.getImage().lastIndexOf('.') + 1;
39 className = importedType.getImage().substring(lastDot);
40 } else {
41 className = importedType.getImage();
42 }
43 imports.add(new ImportWrapper(importedType.getImage(), className, node));
44 }
45
46 return data;
47 }
48
49 public Object visit(ASTClassOrInterfaceType node, Object data) {
50 check(node);
51 return super.visit(node, data);
52 }
53
54 public Object visit(ASTName node, Object data) {
55 check(node);
56 return data;
57 }
58
59 private void check(SimpleNode node) {
60 String name;
61 if (!isQualifiedName(node)) {
62 name = node.getImage();
63 } else {
64 name = node.getImage().substring(0, node.getImage().indexOf('.'));
65 }
66 ImportWrapper candidate = new ImportWrapper(node.getImage(), name, new SimpleJavaNode(-1));
67 if (imports.contains(candidate)) {
68 imports.remove(candidate);
69 }
70 }
71 }
72 |
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