@Transactional(readOnly = true)
public List<Department> findRoots() {
List<Department> roots = Lists.newArrayList();
Iterable<Department> items = departmentDao.findAllCached();
for (Department item : items) {
if (item.getParent() == null) {
roots.add(item);
}
}
Collections.sort(roots);
return roots;
}
@Transactional(readOnly = true)
public List<Department> findChildren(Department parent) {
if (parent == null) {
return findRoots();
}
List<Department> children = Lists.newArrayList();
Iterable<Department> items = departmentDao.findAllCached();
for (Department item : items) {
if (parent.equals(item.getParent())) {
children.add(item);
}
}
Collections.sort(children);
return children;
}
@Transactional(readOnly = true)
public List<Department> findChildrenCascade(Department parent) {
Assert.notNull(parent);
List<Department> children = Lists.newArrayList();
Iterable<Department> items = departmentDao.findAllCached();
for (Department item : items) {
Department loop = item.getParent();
while (loop != null) {
if (parent.equals(loop)) {
children.add(item);
break;
}
loop = loop.getParent();
}
}
Collections.sort(children);
return children;
}