/**
* @author Bogdan Sliptsov
* <p>This method returns true if user is a group-creator and has rights to modify group and
* returns false if user doesn't have admin rights.
*/
public boolean isCreator(Long groupId, String deviceId) {
if (groupId == null) return false;
if (StringUtils.isEmpty(deviceId)) return false;
Group group = findById(groupId);
if (group == null) return false;
Device device = devicesDao.read(deviceId);
if (device == null) return false;
if (!group.getIdCreator().equals(deviceId)) return false;
return true;
}
