cross-solution / YAWIK

     * @see \Jobs\Entity\JobInterface::setDatePublishStart()

     * @return $this

     */

    public function setDatePublishStart($datePublishStart = null)

    {

        if (!isset($datePublishStart) || is_string($datePublishStart)) {

            $datePublishStart = new \DateTime($datePublishStart);

        } else if (!$datePublishStart instanceOf \DateTime) {

            throw new \InvalidArgumentException('Expected object of type \DateTime');

        }

        $this->datePublishStart = $datePublishStart;

        return $this;

    }

    /**

     * (non-PHPdoc)

     * @see \Jobs\Entity\JobInterface::setDatePublishEnd()

     * @return $this

     */

    public function setDatePublishEnd($datePublishEnd = null)

    {

        if (is_string($datePublishEnd)) {

            $datePublishEnd = new \DateTime($datePublishEnd);

        } else if (!$datePublishEnd instanceOf \DateTime) {

            throw new \InvalidArgumentException('Expected object of type \DateTime');

        }

        $this->datePublishEnd = $datePublishEnd;

        return $this;

    }

    /**

     * Modifies the state of an application.