/**
* Gets the number of documents matching the filter.
*
* @see Count::__construct() for supported options
*
* @param array|object $filter Query by which to filter documents
* @param array $options Command options
*
* @return integer
*/
public function count($filter = [], array $options = [])
{
if (!isset($options['readConcern'])) {
$options['readConcern'] = $this->readConcern;
}
if (!isset($options['readPreference'])) {
$options['readPreference'] = $this->readPreference;
}
$operation = new Count($this->databaseName, $this->collectionName, $filter, $options);
$server = $this->manager->selectServer($options['readPreference']);
return $operation->execute($server);
}
