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1
6 package net.sourceforge.pmd.rules;
7
8 import net.sourceforge.pmd.AbstractRule;
9 import net.sourceforge.pmd.ast.ASTConstructorDeclaration;
10 import net.sourceforge.pmd.ast.ASTFieldDeclaration;
11 import net.sourceforge.pmd.ast.ASTInitializer;
12 import net.sourceforge.pmd.ast.ASTMethodDeclaration;
13 import net.sourceforge.pmd.ast.ASTVariableDeclaratorId;
14 import net.sourceforge.pmd.ast.SimpleNode;
15 import net.sourceforge.pmd.symboltable.NameOccurrence;
16
17 import java.util.List  ;
18
19
22 public class SingularField extends AbstractRule {
23
24 public Object visit(ASTFieldDeclaration node, Object data) {
25 if (node.isPrivate() && !node.isStatic()) {
26 List list = node.findChildrenOfType(ASTVariableDeclaratorId.class);
27 ASTVariableDeclaratorId declaration = (ASTVariableDeclaratorId) list.get(0);
28 List usages = declaration.getUsages();
29 SimpleNode decl = null;
30 boolean violation = true;
31 for (int ix = 0; ix < usages.size(); ix++) {
32 NameOccurrence no = (NameOccurrence) usages.get(ix);
33 SimpleNode location = no.getLocation();
34
35 SimpleNode method = (SimpleNode) location.getFirstParentOfType(ASTMethodDeclaration.class);
36 if (method == null) {
37 method = (SimpleNode) location.getFirstParentOfType(ASTConstructorDeclaration.class);
38 if (method == null) {
39 method = (SimpleNode) location.getFirstParentOfType(ASTInitializer.class);
40 if (method == null) {
41 continue;
42 }
43 }
44 }
45
46 if (decl == null) {
47 decl = method;
48 continue;
49 } else if (decl != method) {
50
51 violation = false;
52 }
53 }
54
55 if (violation && !usages.isEmpty()) {
56 addViolation(data, node, new Object [] { declaration.getImage() });
57 }
58 }
59 return data;
60 }
61 }
62 |
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