interface QueryExtendableInterface

backdrop_class_list in core/includes/bootstrap.classes.inc

Lists all the classes used by Backdrop core.

interface QueryExtendableInterface {

  /**
   * Enhance this object by wrapping it in an extender object.
   *
   * The core implementations of QueryExtendableInterface include:
   *   - TableSort: Extend a query to sort based on query strings.
   *   - PagerDefault: Extend a query to limit results based on query strings.
   *   - SearchQuery: Extend a query to join on the search index tables.
   *
   * Other implementations may be added by other modules, but for the sake of
   * code validation, these core extenders are specified as possible return
   * values of this interface.
   *
   * @param $extender_name
   *   The base name of the extending class.  The base name will be checked
   *   against the current database connection to allow driver-specific subclasses
   *   as well, using the same logic as the query objects themselves.  For example,
   *   PagerDefault_mysql is the MySQL-specific override for PagerDefault.
   * @return QueryExtendableInterface|SelectQueryInterface|TableSort|PagerDefault|SearchQuery
   *   The extender object, which now contains a reference to this object.
   */
  public function extend($extender_name);
}