* @return the found object.
     */
    public IpPoolManagement findIp(final VLANNetwork vlan, final Integer ipId)
    {
        Criteria criteria = getSession().createCriteria(IpPoolManagement.class);
        Criterion vlanEqual = Restrictions.eq(IpPoolManagement.VLAN_NETWORK_PROPERTY, vlan);
        Criterion ipEqual = Restrictions.eq(PersistentEntity.ID_PROPERTY, ipId);
        criteria.add(vlanEqual).add(ipEqual);
        return (IpPoolManagement) criteria.uniqueResult();
    }