public List<DomainObject> getChildren(Class<? extends DomainObject>... types) {
final List<DomainObject> result = new ArrayList<DomainObject>();
for (DomainObject p : getChildren()) {
final String name = p.getProperty(DomainObject.ClassType);
if (name != null && Utils.isContainProperty(name, types)) {
result.add(p);
}
}
return result;
}
private void checkArguments(DomainObject object) {
if (object == null) {
throw new IllegalArgumentException("This container cannot contain 'null' elements");
}
final Children children = getClass().getAnnotation(Children.class);
if (children == null || check(children.types(), object.getClass(), children.allowSubtypes())) {
throw new IllegalArgumentException(
String.format(
"The container '%s' cannot contain elements with type '%s'",
getClass().getName(), object.getClass().getName()));
}
}