@Override
public void visitNode(Tree tree) {
ListTree<TypeTree> thrownList = ((MethodTree) tree).throwsClauses();
Set<String> reported = new HashSet<>();
for (TypeTree typeTree : thrownList) {
Type symbolType = typeTree.symbolType();
String fullyQualifiedName = symbolType.fullyQualifiedName();
if (!reported.contains(fullyQualifiedName)) {
String superTypeName = isSubclassOfAny(symbolType, thrownList);
if (superTypeName != null) {
addIssue(
typeTree,
"Remove the declaration of thrown exception '"
+ fullyQualifiedName
+ "' which is a subclass of '"
+ superTypeName
+ "'.");
} else if (symbolType.isSubtypeOf("java.lang.RuntimeException")) {
addIssue(
typeTree,
"Remove the declaration of thrown exception '"
+ fullyQualifiedName
+ "' which is a runtime exception.");
} else if (declaredMoreThanOnce(fullyQualifiedName, thrownList)) {
addIssue(
typeTree,
"Remove the redundant '" + fullyQualifiedName + "' thrown exception declaration(s).");
}
reported.add(fullyQualifiedName);
}
}
}
private static String isSubclassOfAny(Type type, ListTree<TypeTree> thrownList) {
for (TypeTree thrown : thrownList) {
String name = thrown.symbolType().fullyQualifiedName();
if (!type.is(name) && type.isSubtypeOf(name)) {
return name;
}
}
return null;
}
private static boolean isSubtypeOf(Type type, Type superType) {
return type.isSubtypeOf(superType);
}
private static boolean isCloseable(Type type) {
return type.isSubtypeOf(JAVA_IO_AUTO_CLOSEABLE) || type.isSubtypeOf(JAVA_IO_CLOSEABLE);
}