protected function setup_metadata() {
		if ( ! $this->meta_type ) {
			return;
		}

		$metadata = $this->get_metadata();
		foreach ( $this->get_mapping() as $attribute => $meta ) {
			if ( isset( $metadata[ $meta ] ) ) {
				$this->set_attribute( $attribute, $metadata[ $meta ] );
			}
		}
	}