public static <T> Set<T> findOperators(Collection<Operator<?>> starts, Class<T> clazz) {
Set<T> found = new HashSet<T>();
for (Operator<?> start : starts) {
findOperators(start, clazz, found);
}
return found;
}
@SuppressWarnings("unchecked")
private static <T> Set<T> findOperators(Operator<?> start, Class<T> clazz, Set<T> found) {
if (clazz.isInstance(start)) {
found.add((T) start);
}
if (start.getChildOperators() != null) {
for (Operator<?> child : start.getChildOperators()) {
findOperators(child, clazz, found);
}
}
return found;
}