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1
4 package net.sourceforge.pmd.typeresolution.rules;
5
6 import net.sourceforge.pmd.AbstractRule;
7 import net.sourceforge.pmd.ast.ASTBlock;
8 import net.sourceforge.pmd.ast.ASTBlockStatement;
9 import net.sourceforge.pmd.ast.ASTClassOrInterfaceDeclaration;
10 import net.sourceforge.pmd.ast.ASTClassOrInterfaceType;
11 import net.sourceforge.pmd.ast.ASTExtendsList;
12 import net.sourceforge.pmd.ast.ASTFormalParameters;
13 import net.sourceforge.pmd.ast.ASTImplementsList;
14 import net.sourceforge.pmd.ast.ASTMethodDeclaration;
15 import net.sourceforge.pmd.ast.ASTMethodDeclarator;
16 import net.sourceforge.pmd.ast.SimpleNode;
17
18 import java.util.Arrays  ;
19 import java.util.List ;
20
21
31 public class CloneMethodMustImplementCloneable extends AbstractRule {
32
33 public Object visit(ASTClassOrInterfaceDeclaration node, Object data) {
34 ASTImplementsList impl = (ASTImplementsList) node.getFirstChildOfType(ASTImplementsList.class);
35 if (impl != null && impl.jjtGetParent().equals(node)) {
36 for (int ix = 0; ix < impl.jjtGetNumChildren(); ix++) {
37 ASTClassOrInterfaceType type = (ASTClassOrInterfaceType) impl.jjtGetChild(ix);
38 if (type.getType() == null) {
39 if ("Cloneable".equals(type.getImage())) {
40 return data;
41 }
42 } else if (type.getType().equals(Cloneable .class)) {
43 return data;
44 } else {
45 List implementors = Arrays.asList(type.getType().getInterfaces());
46 if (implementors.contains(Cloneable .class)) {
47 return data;
48 }
49 }
50 }
51 }
52 if (node.jjtGetNumChildren() != 0 && node.jjtGetChild(0).getClass().equals(ASTExtendsList.class)) {
53 ASTClassOrInterfaceType type = (ASTClassOrInterfaceType) ((SimpleNode) node.jjtGetChild(0)).jjtGetChild(0);
54 Class clazz = type.getType();
55 if (clazz != null && clazz.equals(Cloneable .class)) {
56 return data;
57 }
58 while (clazz != null && !Object .class.equals(clazz)) {
59 if (Arrays.asList(clazz.getInterfaces()).contains(Cloneable .class)) {
60 return data;
61 }
62 clazz = clazz.getSuperclass();
63 }
64 }
65
66 return super.visit(node, data);
67 }
68
69 public Object visit(ASTMethodDeclaration node, Object data) {
70
71 if (node.isFinal()) {
72 List blocks = node.findChildrenOfType(ASTBlock.class);
73 if (blocks.size() == 1) {
74 blocks = node.findChildrenOfType(ASTBlockStatement.class);
75 if (blocks.size() == 1) {
76 ASTBlockStatement block = (ASTBlockStatement) blocks.get(0);
77 ASTClassOrInterfaceType type = (ASTClassOrInterfaceType) block.getFirstChildOfType(ASTClassOrInterfaceType.class);
78 if (type != null && type.getType() != null && type.getNthParent(9).equals(node) && type.getType().equals(CloneNotSupportedException .class)) {
79 return data;
80 } else if (type != null && type.getType() == null && "CloneNotSupportedException".equals(type.getImage())) {
81 return data;
82 }
83 }
84 }
85 }
86 return super.visit(node, data);
87 }
88
89 public Object visit(ASTMethodDeclarator node, Object data) {
90 if (!"clone".equals(node.getImage())) {
91 return data;
92 }
93 int countParams = ((ASTFormalParameters) node.jjtGetChild(0)).jjtGetNumChildren();
94 if (countParams != 0) {
95 return data;
96 }
97 addViolation(data, node);
98 return data;
99 }
100 } |
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