@Override
public void visitNode(Tree tree) {
if (hasSemantic()) {
TypeParameters typeParameters;
String messageEnd;
if (tree.is(Tree.Kind.METHOD)) {
typeParameters = ((MethodTree) tree).typeParameters();
messageEnd = "method.";
} else {
typeParameters = ((ClassTree) tree).typeParameters();
messageEnd = "class.";
if (tree.is(Tree.Kind.INTERFACE)) {
messageEnd = "interface.";
}
}
for (TypeParameterTree typeParameter : typeParameters) {
Symbol symbol = getSemanticModel().getSymbol(typeParameter);
if (symbol.usages().isEmpty()) {
String message =
new StringBuilder(typeParameter.identifier().name())
.append(" is not used in the ")
.append(messageEnd)
.toString();
addIssue(typeParameter, message);
}
}
}
}
public void checkIfUnused(VariableTree tree) {
if (tree.modifiers().annotations().isEmpty()) {
Symbol symbol = tree.symbol();
String name = symbol.name();
if (symbol.isPrivate()
&& !"serialVersionUID".equals(name)
&& symbol.usages().size() == assignments.get(symbol).size()) {
addIssue(tree, "Remove this unused \"" + name + "\" private field.");
}
}
}
@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.");
}
}
}