@SuppressWarnings({"unchecked", "rawtypes"})
public static <K> K key(final Class<K> keyClass) {
Class<? extends IdGenerator> genClass =
Instances.fetch(
() -> {
Map<Class<?>, Class<? extends IdGenerator>> map =
new HashMap<Class<?>, Class<? extends IdGenerator>>();
for (Class<? extends IdGenerator> subClass :
Reflections.getSubClasses(IdGenerator.class)) {
Class<?> pcl =
Generics.resolveGenericParameter(subClass, IdGenerator.class, "K");
map.put(pcl, subClass);
}
return map;
})
.get(keyClass);
if (null == genClass) throw new SystemException("", "Could not found any key generator class.");
IdGenerator<K> g = Instances.fetch(genClass);
return g.generate();
}
@Deprecated
public static String objectId() {
return Instances.fetch(ObjectIdGenerator.class).generate();
}
