public function read( &$order ) {
		$order->set_defaults();
		$post_object = get_post( $order->get_id() );

		if ( ! $order->get_id() || ! $post_object || ! in_array( $post_object->post_type, wc_get_order_types(), true ) ) {
			throw new Exception( __( 'Invalid order.', 'woocommerce' ) );
		}

		$order->set_props(
			array(
				'parent_id'     => $post_object->post_parent,
				'date_created'  => 0 < $post_object->post_date_gmt ? wc_string_to_timestamp( $post_object->post_date_gmt ) : null,
				'date_modified' => 0 < $post_object->post_modified_gmt ? wc_string_to_timestamp( $post_object->post_modified_gmt ) : null,
				'status'        => $post_object->post_status,
			)
		);

		$this->read_order_data( $order, $post_object );
		$order->read_meta_data();
		$order->set_object_read( true );

		/**
		 * In older versions, discounts may have been stored differently.
		 * Update them now so if the object is saved, the correct values are
		 * stored. @todo When meta is flattened, handle this during migration.
		 */
		if ( version_compare( $order->get_version( 'edit' ), '2.3.7', '<' ) && $order->get_prices_include_tax( 'edit' ) ) {
			$order->set_discount_total( (float) get_post_meta( $order->get_id(), '_cart_discount', true ) - (float) get_post_meta( $order->get_id(), '_cart_discount_tax', true ) );
		}
	}