function SelectExtender::extend

Overrides ExtendableInterface::extend

File

core/lib/Drupal/Core/Database/Query/SelectExtender.php, line 220

Class

SelectExtender

The base extender class for Select queries.

Namespace

Code

public function extend($extender_name) {
    // We cannot call $this->query->extend(), because with multiple extenders
    // you will replace all the earlier extenders with the last extender,
    // instead of creating list of objects that extend each other.
    $parts = explode('\\', $extender_name);
    $class = end($parts);
    $driver_class = $this->connection
        ->getDriverClass($class);
    if ($driver_class !== $class) {
        return new $driver_class($this, $this->connection);
    }
    return new $extender_name($this, $this->connection);
}