/**
* Read the feed from remote source using owner.FeedMeLinkFieldName and
* owner.FeedMeFeedType. Return feed item Traversable with items mapped to
* domain model, for example a FeedMeAtomFeedIterator for an atom feed.
*
* @return \FeedMeFeedInterface
* @throws \FeedMeException
*/
protected function feed()
{
$url = $this->getFeedURL();
$xpath = $this->getFeedXPath() ?: $this->defaultXPath();
$feedClass = $this->feedClassName();
if ($url && $xpath && $feedClass) {
$itemModel = Injector::inst()->get('FeedMeItemModel');
$fieldMap = $itemModel->fieldMap();
return Injector::Inst()->create($feedClass, $url, $xpath, $fieldMap);
} else {
throw new FeedMeException(_t("FeedMe.MissingInfoException", 'Missing info for feed {title}', ['title' => $this->owner->Title]));
}
}
