public function getLinkingMethod(Pap_Common_Banner $banner = null) {
if ($banner != null && $banner->getCampaignId() != '') {
$campaign = new Pap_Common_Campaign();
$campaign->setId($banner->getCampaignId());
$campaign->load();
if ($campaign->getLinkingMethod() != self::LINKMETHOD_DEFAULT_VALUE &&
$campaign->getLinkingMethod() != null &&
$campaign->getLinkingMethod() != '') {
return $campaign->getLinkingMethod();
}
}
return Gpf_Settings::get(Pap_Settings::SETTING_LINKING_METHOD);
}