How to use

throwIfNull

method

in

ru.javatalks.utils.general.Assert

/**
 * Throws exception if permission name is not valid.
 *
 * @param name a textual representation of the permission (usually the same as the constant name)
 */
private void throwIfNameNotValid(String name) {
  Assert.throwIfNull(name, "The name can't be null");
}

private void throwIfNameNotValid(String name) {
  Assert.throwIfNull(name, "The name can't be null");
}

/**
 * {@inheritDoc}
 */
@Override
public List<Group> getGroupsOfUser(User user) {
  Assert.throwIfNull(user, "user");
  Query query = session().getNamedQuery("findGroupsOfUser");
  query.setParameter(0, "%" + user + "%");
  return query.list();
}

/**
 * {@inheritDoc}
 */
@Override
public void saveGroup(Group group) {
  Assert.throwIfNull(group, "group");
  group.setName(group.getName().trim());
  dao.saveOrUpdate(group);
}

/**
 * {@inheritDoc}
 */
@Override
public void deleteGroup(Group group) throws NotFoundException {
  Assert.throwIfNull(group, "group");
  if (!isGroupEditable(group.getName())) {
    logger.warn("Attempt to delete pre-defined usergoup {}", group.getName());
    throw new OperationIsNotAllowedException("Pre-defined usergoup " + group.getName() + " cannot be deleted");
  }
  for (User user : group.getUsers()) {
    user.getGroups().remove(group);
    userDao.saveOrUpdate((JCUser) user);
  }
  dao.delete(group);
  UserInfo currentUser = securityService.getCurrentUserBasicInfo();
  UserGroupSid sid = new UserGroupSid(group);
  UserSid sidHeier = new UserSid(currentUser);
  try {
    manager.deleteSid(sid, sidHeier);
  } catch (EmptyResultDataAccessException noSidError) {
    throw new NotFoundException();
  }
}