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| package net.sourceforge.pmd.rules; |
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| |
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| import net.sourceforge.pmd.AbstractRule; |
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| import net.sourceforge.pmd.ast.ASTClassOrInterfaceDeclaration; |
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| import net.sourceforge.pmd.ast.ASTClassOrInterfaceType; |
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| import net.sourceforge.pmd.ast.ASTFormalParameter; |
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| import net.sourceforge.pmd.ast.ASTFormalParameters; |
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| import net.sourceforge.pmd.ast.ASTImplementsList; |
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| import net.sourceforge.pmd.ast.ASTMethodDeclarator; |
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| import net.sourceforge.pmd.ast.SimpleNode; |
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| |
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| import java.util.List; |
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| |
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| public class OverrideBothEqualsAndHashcode extends AbstractRule { |
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| |
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| private boolean implementsComparable = false; |
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| |
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| private boolean containsEquals = false; |
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| |
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| private boolean containsHashCode = false; |
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| |
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| private SimpleNode nodeFound = null; |
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| |
24 |
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| public Object visit(ASTClassOrInterfaceDeclaration node, Object data) {
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25 |
14
| if (node.isInterface()) {
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1
| return data;
|
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| } |
28 |
13
| super.visit(node, data);
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29 |
13
| if (!implementsComparable && (containsEquals ^ containsHashCode)) {
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5
| if(nodeFound == null){
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0
| nodeFound = node;
|
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| } |
33 |
5
| addViolation(data, nodeFound);
|
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| } |
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| implementsComparable = containsEquals = containsHashCode = false;
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36 |
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| nodeFound = null;
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37 |
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| return data;
|
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| } |
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| |
40 |
2
| public Object visit(ASTImplementsList node, Object data) {
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41 |
2
| for (int ix = 0; ix < node.jjtGetNumChildren(); ix++) {
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42 |
2
| if (node.jjtGetChild(ix).getClass().equals(ASTClassOrInterfaceType.class)
|
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| && ((SimpleNode) node.jjtGetChild(ix)).hasImageEqualTo("Comparable")) { |
44 |
1
| implementsComparable = true;
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45 |
1
| return data;
|
46 |
| } |
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| } |
48 |
1
| return super.visit(node, data);
|
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| } |
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| |
51 |
20
| public Object visit(ASTMethodDeclarator node, Object data) {
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52 |
20
| if (implementsComparable) {
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2
| return data;
|
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| } |
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| |
56 |
18
| int iFormalParams = 0;
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57 |
18
| String paramName = null;
|
58 |
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| for (int ix = 0; ix < node.jjtGetNumChildren(); ix++) {
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59 |
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| SimpleNode sn = (SimpleNode) node.jjtGetChild(ix);
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60 |
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| if (sn.getClass().equals(ASTFormalParameters.class)) {
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61 |
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| List allParams = ((ASTFormalParameters) sn).findChildrenOfType(ASTFormalParameter.class);
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62 |
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| for (int i = 0; i < allParams.size(); i++) {
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63 |
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| iFormalParams++;
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64 |
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| ASTFormalParameter formalParam = (ASTFormalParameter) allParams.get(i);
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65 |
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| ASTClassOrInterfaceType param = (ASTClassOrInterfaceType) formalParam.getFirstChildOfType(ASTClassOrInterfaceType.class);
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66 |
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| if (param != null) {
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| paramName = param.getImage();
|
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| } |
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| } |
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| } |
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| } |
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| |
73 |
18
| if (iFormalParams == 0 && node.hasImageEqualTo("hashCode")) {
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74 |
4
| containsHashCode = true;
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75 |
4
| nodeFound = node;
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76 |
14
| } else if (iFormalParams == 1 && node.hasImageEqualTo("equals") && ("Object".equals(paramName) || "java.lang.Object".equals(paramName))) {
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77 |
5
| containsEquals = true;
|
78 |
5
| nodeFound = node;
|
79 |
| } |
80 |
18
| return super.visit(node, data);
|
81 |
| } |
82 |
| |
83 |
| } |