protected function read_attributes( &$product ) {
		$meta_attributes = get_post_meta( $product->get_id(), '_product_attributes', true );

		if ( ! empty( $meta_attributes ) && is_array( $meta_attributes ) ) {
			$attributes = array();
			foreach ( $meta_attributes as $meta_attribute_key => $meta_attribute_value ) {
				$meta_value = array_merge(
					array(
						'name'         => '',
						'value'        => '',
						'position'     => 0,
						'is_visible'   => 0,
						'is_variation' => 0,
						'is_taxonomy'  => 0,
					),
					(array) $meta_attribute_value
				);

				// Check if is a taxonomy attribute.
				if ( ! empty( $meta_value['is_taxonomy'] ) ) {
					if ( ! taxonomy_exists( $meta_value['name'] ) ) {
						continue;
					}
					$id      = wc_attribute_taxonomy_id_by_name( $meta_value['name'] );
					$options = wc_get_object_terms( $product->get_id(), $meta_value['name'], 'term_id' );
				} else {
					$id      = 0;
					$options = wc_get_text_attributes( $meta_value['value'] );
				}

				$attribute = new WC_Product_Attribute();
				$attribute->set_id( $id );
				$attribute->set_name( $meta_value['name'] );
				$attribute->set_options( $options );
				$attribute->set_position( $meta_value['position'] );
				$attribute->set_visible( $meta_value['is_visible'] );
				$attribute->set_variation( $meta_value['is_variation'] );
				$attributes[] = $attribute;
			}
			$product->set_attributes( $attributes );
		}
	}