1 |
| package net.sourceforge.pmd.rules.strings; |
2 |
| |
3 |
| import net.sourceforge.pmd.AbstractRule; |
4 |
| import net.sourceforge.pmd.ast.ASTName; |
5 |
| import net.sourceforge.pmd.ast.ASTPrimaryExpression; |
6 |
| import net.sourceforge.pmd.ast.ASTPrimaryPrefix; |
7 |
| import net.sourceforge.pmd.ast.ASTPrimarySuffix; |
8 |
| |
9 |
| public class UnnecessaryCaseChange extends AbstractRule { |
10 |
| |
11 |
4
| public Object visit(ASTPrimaryExpression exp, Object data) {
|
12 |
4
| if (exp.jjtGetNumChildren() < 4) {
|
13 |
0
| return data;
|
14 |
| } |
15 |
| |
16 |
4
| String first = getBadPrefixOrNull(exp);
|
17 |
4
| if (first == null) {
|
18 |
0
| return data;
|
19 |
| } |
20 |
| |
21 |
4
| String second = getBadSuffixOrNull(exp);
|
22 |
4
| if (second == null) {
|
23 |
0
| return data;
|
24 |
| } |
25 |
| |
26 |
4
| if (!(exp.jjtGetChild(1) instanceof ASTPrimarySuffix)) {
|
27 |
0
| return data;
|
28 |
| } |
29 |
4
| ASTPrimarySuffix methodCall = (ASTPrimarySuffix)exp.jjtGetChild(1);
|
30 |
4
| if (!methodCall.isArguments() || methodCall.getArgumentCount() > 0) {
|
31 |
1
| return data;
|
32 |
| } |
33 |
| |
34 |
3
| addViolation(data, exp);
|
35 |
3
| return data;
|
36 |
| } |
37 |
| |
38 |
4
| private String getBadPrefixOrNull(ASTPrimaryExpression exp) {
|
39 |
| |
40 |
4
| if (!(exp.jjtGetChild(0) instanceof ASTPrimaryPrefix)) {
|
41 |
0
| return null;
|
42 |
| } |
43 |
| |
44 |
4
| ASTPrimaryPrefix prefix = (ASTPrimaryPrefix) exp.jjtGetChild(0);
|
45 |
4
| if (prefix.jjtGetNumChildren() != 1 || !(prefix.jjtGetChild(0) instanceof ASTName)) {
|
46 |
0
| return null;
|
47 |
| } |
48 |
| |
49 |
4
| ASTName name = (ASTName) prefix.jjtGetChild(0);
|
50 |
4
| if (name.getImage() == null || !(name.getImage().endsWith("toUpperCase") || name.getImage().endsWith("toLowerCase"))) {
|
51 |
0
| return null;
|
52 |
| } |
53 |
4
| return name.getImage();
|
54 |
| } |
55 |
| |
56 |
4
| private String getBadSuffixOrNull(ASTPrimaryExpression exp) {
|
57 |
| |
58 |
4
| if (!(exp.jjtGetChild(2) instanceof ASTPrimarySuffix)) {
|
59 |
0
| return null;
|
60 |
| } |
61 |
| |
62 |
4
| ASTPrimarySuffix suffix = (ASTPrimarySuffix) exp.jjtGetChild(2);
|
63 |
4
| if (suffix.getImage() == null || !(suffix.getImage().equals("equals") || suffix.getImage().equals("equalsIgnoreCase"))) {
|
64 |
0
| return null;
|
65 |
| } |
66 |
4
| return suffix.getImage();
|
67 |
| } |
68 |
| |
69 |
| } |