/**
* Deletes the authorization after removing it from any groups that might be referring to it
*
* @param em the entity manager reference
* @param id the ID for authorizatino entity
* @throws PersistenceException if there were any errors deleting the authorization
*/
static void deleteAuthorization(EntityManager em, long id) throws PersistenceException {
Authorization auth = em.find(Authorization.class, id);
// may return null, if this entity is not saved, in which
// case don't do anything.
if (auth == null) {
return;
}
// Iterate through all groups and remove the authorization from them
Set<SummaryGroup> groups = auth.getGroups();
if (groups != null) {
for (SummaryGroup g : groups) {
Group group = new SingleGroupQuery(g.getId()).fetch();
Set<Authorization> auths = group.getAuthorizations();
HashSet<Authorization> updated = new HashSet<Authorization>();
for (Authorization a : auths) {
if (a.getId() != auth.getId()) {
updated.add(a);
}
}
group.setAuthorizations(updated);
group.save();
}
}
em.remove(em.getReference(Authorization.class, auth.getId()));
}
