public function find($criteria = array())
    {
        if (!is_array($criteria)) {
            $criteria = array(
                '$id' => $criteria,
            );
        }

        // wrap criteria as NObject instance to make sure it can be override by hooks
        $criteria = new NObject($criteria);

        $this->applyHook('searching', $criteria);
        $cursor = $this->connection->query($this, $criteria->toArray());
        $this->applyHook('searched', $cursor);

        return $cursor;
    }