public static <V> Map<String, V> parseToMap(JsonObject jo) {
Map<String, V> map = CollectionKit.newHashMap();
if (jo != null) {
List<String> names = jo.names();
for (String name : names) {
map.put(name, (V) jo.get(name));
}
}
return map;
}
/** 集合交集 */
public static final <T> Set<T> intersection(Set<T> set1, Set<T> set2) {
if (set1 == null || set2 == null) {
return null;
}
if (set1.isEmpty() || set2.isEmpty()) {
return Collections.emptySet();
}
Set<T> result = CollectionKit.createHashSet();
Set<T> smaller = (set1.size() > set2.size()) ? set2 : set1;
Set<T> bigger = (smaller == set2) ? set1 : set2;
for (T value : smaller) {
if (bigger.contains(value)) {
result.add(value);
}
}
return result;
}