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1 package net.sourceforge.pmd.rules.design;
2
3 import net.sourceforge.pmd.AbstractRule;
4 import net.sourceforge.pmd.RuleContext;
5 import net.sourceforge.pmd.ast.ASTArgumentList;
6 import net.sourceforge.pmd.ast.ASTCastExpression;
7 import net.sourceforge.pmd.ast.ASTCatchStatement;
8 import net.sourceforge.pmd.ast.ASTClassOrInterfaceType;
9 import net.sourceforge.pmd.ast.ASTName;
10 import net.sourceforge.pmd.ast.ASTPrimaryExpression;
11 import net.sourceforge.pmd.ast.ASTPrimaryPrefix;
12 import net.sourceforge.pmd.ast.ASTThrowStatement;
13 import net.sourceforge.pmd.ast.SimpleNode;
14 import net.sourceforge.pmd.symboltable.VariableNameDeclaration;
15 import org.jaxen.JaxenException;
16
17 import java.util.Iterator  ;
18 import java.util.List ;
19 import java.util.Map ;
20
21 public class PreserveStackTrace extends AbstractRule {
22
23 public Object visit(ASTCatchStatement node, Object data) {
24 String target = (((SimpleNode) node.jjtGetChild(0).jjtGetChild(1)).getImage());
25 List lstThrowStatements = node.findChildrenOfType(ASTThrowStatement.class);
26 for (Iterator iter = lstThrowStatements.iterator(); iter.hasNext();) {
27 ASTThrowStatement throwStatement = (ASTThrowStatement) iter.next();
28 SimpleNode sn = (SimpleNode) throwStatement.jjtGetChild(0).jjtGetChild(0);
29 if (sn.getClass().equals(ASTCastExpression.class)) {
30 ASTPrimaryExpression expr = (ASTPrimaryExpression) sn.jjtGetChild(1);
31 if (expr.jjtGetNumChildren() > 1 && expr.jjtGetChild(1).getClass().equals(ASTPrimaryPrefix.class)) {
32 RuleContext ctx = (RuleContext) data;
33 addViolation(ctx, throwStatement);
34 }
35 continue;
36 }
37 ASTArgumentList args = (ASTArgumentList) throwStatement.getFirstChildOfType(ASTArgumentList.class);
38
39 if (args != null) {
40 ck(data, target, throwStatement, args);
41 } else if (args == null) {
42 SimpleNode child = (SimpleNode) throwStatement.jjtGetChild(0);
43 while (child != null && child.jjtGetNumChildren() > 0
44 && !child.getClass().equals(ASTName.class)) {
45 child = (SimpleNode) child.jjtGetChild(0);
46 }
47 if (child != null){
48 if( child.getClass().equals(ASTName.class) && (!target.equals(child.getImage()) && !child.hasImageEqualTo(target + ".fillInStackTrace"))) {
49 Map vars = ((ASTName) child).getScope().getVariableDeclarations();
50 for (Iterator i = vars.keySet().iterator(); i.hasNext();) {
51 VariableNameDeclaration decl = (VariableNameDeclaration) i.next();
52 args = (ASTArgumentList) ((SimpleNode) decl.getNode().jjtGetParent())
53 .getFirstChildOfType(ASTArgumentList.class);
54 if (args != null) {
55 ck(data, target, throwStatement, args);
56 }
57 }
58 } else if(child.getClass().equals(ASTClassOrInterfaceType.class)){
59 addViolation((RuleContext) data, throwStatement);
60 }
61 }
62 }
63 }
64 return super.visit(node, data);
65 }
66
67 private void ck(Object data, String target,
68 ASTThrowStatement throwStatement, ASTArgumentList args) {
69 try {
70 List lst = args.findChildNodesWithXPath("//Name[@Image='" + target
71 + "']");
72 if (lst.isEmpty()) {
73 RuleContext ctx = (RuleContext) data;
74 addViolation(ctx, throwStatement);
75 }
76 } catch (JaxenException e) {
77 e.printStackTrace();
78 }
79 }
80 }
81 |
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