class TestSqlIdMap

class TestSqlIdMap extends Sql implements \Iterator {
    
    /**
     * Constructs a TestSqlIdMap object.
     *
     * @param \Drupal\Core\Database\Connection $database
     *   The database.
     * @param array $configuration
     *   The configuration.
     * @param string $plugin_id
     *   The plugin ID for the migration process to do.
     * @param mixed $plugin_definition
     *   The configuration for the plugin.
     * @param \Drupal\migrate\Plugin\MigrationInterface $migration
     *   The migration to do.
     * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
     *   The event dispatcher service.
     */
    public function __construct(Connection $database, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration, EventDispatcherInterface $event_dispatcher) {
        $this->database = $database;
        parent::__construct($configuration, $plugin_id, $plugin_definition, $migration, $event_dispatcher);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDatabase() {
        return parent::getDatabase();
    }
    
    /**
     * Gets the field schema.
     *
     * @param array $id_definition
     *   An array defining the field, with a key 'type'.
     *
     * @return array
     *   A field schema depending on value of key 'type'.  An empty array is
     *   returned if 'type' is not defined.
     *
     * @throws \Drupal\migrate\MigrateException
     */
    protected function getFieldSchema(array $id_definition) {
        if (!isset($id_definition['type'])) {
            return [];
        }
        switch ($id_definition['type']) {
            case 'integer':
                return [
                    'type' => 'int',
                    'not null' => TRUE,
                ];
            case 'string':
                return [
                    'type' => 'varchar',
                    'length' => 255,
                    'not null' => FALSE,
                ];
            default:
                throw new MigrateException($id_definition['type'] . ' not supported');
        }
    }

}