@Override
public void leaveNode(Tree tree) {
if (tree.is(Tree.Kind.CATCH)) {
CatchTree catchTree = (CatchTree) tree;
caughtVariables.remove(catchTree.parameter().simpleName().name());
}
}
@Override
public void visitNode(Tree tree) {
if (tree.is(Tree.Kind.CATCH)) {
CatchTree catchTree = (CatchTree) tree;
caughtVariables.add(catchTree.parameter().simpleName().name());
} else if (isLeftOperandAnException((InstanceOfTree) tree)) {
addIssue(
((InstanceOfTree) tree).instanceofKeyword(),
"Replace the usage of the \"instanceof\" operator by a catch block.");
}
}
@Override
public void visitCatch(CatchTree tree) {
if (!isExcludedType(tree.parameter().type())) {
Symbol exception = tree.parameter().symbol();
validUsagesStack.addFirst(exception.usages());
super.visitCatch(tree);
Collection<IdentifierTree> usages = validUsagesStack.pop();
if (usages.isEmpty()) {
context.reportIssue(this, tree.parameter(), "Either log or rethrow this exception.");
}
}
}