/**
     * Return instance of Zf_Domain_Entity.
     *
     * @return Zf_Domain_Entity
     * @throws Zf_DataSource_Dao_Exception
     */
    public function getEntity()
    {
        if (null === $this->_entity) {
            throw new Zf_DataSource_Dao_Exception('Entity not defined');
        }
        return clone $this->_entity;
    }