private boolean hasAssignmentOperator(Node node) {
if (node instanceof ASTStatementExpression || node instanceof ASTExpression) {
if (node.jjtGetNumChildren() >= 2 && node.jjtGetChild(1) instanceof ASTAssignmentOperator) {
return true;
}
}
return false;
}
protected void apply(Node node, RuleContext ctx) {
for (int i = 0; i < node.jjtGetNumChildren(); i++) {
apply(node.jjtGetChild(i), ctx);
}
if ("Foo".equals(node.getImage())) {
addViolation(ctx, node);
}
}
public ElementNode(
DocumentNode document,
IdGenerator idGenerator,
ElementNode parent,
Node node,
int siblingPosition) {
this.document = document;
this.parent = parent;
this.node = node;
this.id = idGenerator.getNextId();
this.siblingPosition = siblingPosition;
if (node.jjtGetNumChildren() > 0) {
this.children = new NodeInfo[node.jjtGetNumChildren()];
for (int i = 0; i < children.length; i++) {
children[i] = new ElementNode(document, idGenerator, this, node.jjtGetChild(i), i);
}
} else {
this.children = null;
}
document.nodeToElementNode.put(node, this);
}
/**
* Assert it the occurrence is a self assignment such as: <code>
* i += 3;
* </code>
*
* @return true, if the occurrence is self-assignment, false, otherwise.
*/
@SuppressWarnings("PMD.AvoidBranchingStatementAsLastInLoop")
public boolean isSelfAssignment() {
Node l = location;
while (true) {
Node p = l.jjtGetParent();
Node gp = p.jjtGetParent();
Node node = gp.jjtGetParent();
if (node instanceof ASTPreDecrementExpression
|| node instanceof ASTPreIncrementExpression
|| node instanceof ASTPostfixExpression) {
return true;
}
if (hasAssignmentOperator(gp)) {
return isCompoundAssignment(gp);
}
if (hasAssignmentOperator(node)) {
return isCompoundAssignment(node);
}
// deal with extra parenthesis: "(i)++"
if (p instanceof ASTPrimaryPrefix
&& p.jjtGetNumChildren() == 1
&& gp instanceof ASTPrimaryExpression
&& gp.jjtGetNumChildren() == 1
&& node instanceof ASTExpression
&& node.jjtGetNumChildren() == 1
&& node.jjtGetParent() instanceof ASTPrimaryPrefix
&& node.jjtGetParent().jjtGetNumChildren() == 1) {
l = node;
continue;
}
// catch this.i++ or ++this.i
return gp instanceof ASTPreDecrementExpression
|| gp instanceof ASTPreIncrementExpression
|| gp instanceof ASTPostfixExpression;
}
}
public boolean isOnLeftHandSide() {
// I detest this method with every atom of my being
Node primaryExpression;
if (location.jjtGetParent() instanceof ASTPrimaryExpression) {
primaryExpression = location.jjtGetParent().jjtGetParent();
} else if (location.jjtGetParent().jjtGetParent() instanceof ASTPrimaryExpression) {
primaryExpression = location.jjtGetParent().jjtGetParent().jjtGetParent();
} else {
throw new RuntimeException(
"Found a NameOccurrence that didn't have an ASTPrimary Expression as parent or grandparent. Parent = "
+ location.jjtGetParent()
+ " and grandparent = "
+ location.jjtGetParent().jjtGetParent());
}
if (isStandAlonePostfix(primaryExpression)) {
return true;
}
if (primaryExpression.jjtGetNumChildren() <= 1) {
return false;
}
if (!(primaryExpression.jjtGetChild(1) instanceof ASTAssignmentOperator)) {
return false;
}
if (isPartOfQualifiedName() /* or is an array type */) {
return false;
}
if (isCompoundAssignment(primaryExpression)) {
return false;
}
return true;
}
@Override
public Object visit(ASTCatchStatement catchStmt, Object data) {
String target =
catchStmt
.jjtGetChild(0)
.findChildrenOfType(ASTVariableDeclaratorId.class)
.get(0)
.getImage();
// Inspect all the throw stmt inside the catch stmt
List<ASTThrowStatement> lstThrowStatements =
catchStmt.findDescendantsOfType(ASTThrowStatement.class);
for (ASTThrowStatement throwStatement : lstThrowStatements) {
Node n = throwStatement.jjtGetChild(0).jjtGetChild(0);
if (n instanceof ASTCastExpression) {
ASTPrimaryExpression expr = (ASTPrimaryExpression) n.jjtGetChild(1);
if (expr.jjtGetNumChildren() > 1 && expr.jjtGetChild(1) instanceof ASTPrimaryPrefix) {
RuleContext ctx = (RuleContext) data;
addViolation(ctx, throwStatement);
}
continue;
}
// Retrieve all argument for the throw exception (to see if the
// original exception is preserved)
ASTArgumentList args = throwStatement.getFirstDescendantOfType(ASTArgumentList.class);
if (args != null) {
Node parent = args.jjtGetParent().jjtGetParent();
if (parent instanceof ASTAllocationExpression) {
// maybe it is used inside a anonymous class
ck(data, target, throwStatement, parent);
} else {
ck(data, target, throwStatement, args);
}
} else {
Node child = throwStatement.jjtGetChild(0);
while (child != null && child.jjtGetNumChildren() > 0 && !(child instanceof ASTName)) {
child = child.jjtGetChild(0);
}
if (child != null) {
if (child instanceof ASTName
&& !target.equals(child.getImage())
&& !child.hasImageEqualTo(target + FILL_IN_STACKTRACE)) {
Map<VariableNameDeclaration, List<NameOccurrence>> vars =
((ASTName) child).getScope().getDeclarations(VariableNameDeclaration.class);
for (Map.Entry<VariableNameDeclaration, List<NameOccurrence>> entry : vars.entrySet()) {
VariableNameDeclaration decl = entry.getKey();
List<NameOccurrence> occurrences = entry.getValue();
if (decl.getImage().equals(child.getImage())) {
if (!isInitCauseCalled(target, occurrences)) {
args =
decl.getNode().jjtGetParent().getFirstDescendantOfType(ASTArgumentList.class);
if (args != null) {
ck(data, target, throwStatement, args);
}
}
}
}
} else if (child instanceof ASTClassOrInterfaceType) {
addViolation(data, throwStatement);
}
}
}
}
return super.visit(catchStmt, data);
}
public boolean isOnRightHandSide() {
Node node = location.jjtGetParent().jjtGetParent().jjtGetParent();
return node instanceof ASTExpression && node.jjtGetNumChildren() == 3;
}
