public function getFeed($location, $className = 'Zend_Gdata_Feed')
{
if (is_string($location)) {
$uri = $location;
} elseif ($location instanceof Zend_Gdata_Query) {
$uri = $location->getQueryUrl();
} else {
require_once 'Zend/Gdata/App/InvalidArgumentException.php';
throw new Zend_Gdata_App_InvalidArgumentException('You must specify the location as either a string URI ' . 'or a child of Zend_Gdata_Query');
}
return parent::getFeed($uri, $className);
}
/**
* Retrieve the previous set of results from this feed.
*
* @throws Zend_Gdata_App_Exception
* @return mixed|null Returns the previous set of results as a feed of
* the same class as this feed, or null if no results exist.
*/
public function getPreviousFeed()
{
$previousLink = $this->getPreviousLink();
if (!$previousLink) {
require_once 'Zend/Gdata/App/HttpException.php';
throw new Zend_Gdata_App_Exception('No link to previous set ' .
'of results found.');
}
$previousLinkHref = $previousLink->getHref();
$service = new Zend_Gdata_App($this->getHttpClient());
return $service->getFeed($previousLinkHref, get_class($this));
}
