interface ProcessorInterface

interface ProcessorInterface {
    
    /**
     * Processes feed data.
     *
     * @param \Drupal\aggregator\FeedInterface $feed
     *   A feed object representing the resource to be processed.
     *   $feed->items contains an array of feed items downloaded and parsed at the
     *   parsing stage. See \Drupal\aggregator\Plugin\FetcherInterface::parse()
     *   for the basic format of a single item in the $feed->items array.
     *   For the exact format refer to the particular parser in use.
     */
    public function process(FeedInterface $feed);
    
    /**
     * Refreshes feed information.
     *
     * Called after the processing of the feed is completed by all selected
     * processors.
     *
     * @param \Drupal\aggregator\FeedInterface $feed
     *   Object describing feed.
     *
     * @see aggregator_refresh()
     */
    public function postProcess(FeedInterface $feed);
    
    /**
     * Deletes stored feed data.
     *
     * Called by aggregator if either a feed is deleted or a user clicks on
     * "delete items".
     *
     * @param \Drupal\aggregator\FeedInterface $feed
     *   The $feed object whose items are being deleted.
     */
    public function delete(FeedInterface $feed);

}