public function read_meta_data( $force_read = false ) {
		$this->meta_data = array();
		$cache_loaded    = false;

		if ( ! $this->get_id() ) {
			return;
		}

		if ( ! $this->data_store ) {
			return;
		}

		if ( ! empty( $this->cache_group ) ) {
			// Prefix by group allows invalidation by group until https://core.trac.wordpress.org/ticket/4476 is implemented.
			$cache_key = WC_Cache_Helper::get_cache_prefix( $this->cache_group ) . WC_Cache_Helper::get_cache_prefix( 'object_' . $this->get_id() ) . 'object_meta_' . $this->get_id();
		}

		if ( ! $force_read ) {
			if ( ! empty( $this->cache_group ) ) {
				$cached_meta  = wp_cache_get( $cache_key, $this->cache_group );
				$cache_loaded = ! empty( $cached_meta );
			}
		}

		$raw_meta_data = $cache_loaded ? $cached_meta : $this->data_store->read_meta( $this );
		if ( $raw_meta_data ) {
			foreach ( $raw_meta_data as $meta ) {
				$this->meta_data[] = new WC_Meta_Data(
					array(
						'id'    => (int) $meta->meta_id,
						'key'   => $meta->meta_key,
						'value' => maybe_unserialize( $meta->meta_value ),
					)
				);
			}

			if ( ! $cache_loaded && ! empty( $this->cache_group ) ) {
				wp_cache_set( $cache_key, $raw_meta_data, $this->cache_group );
			}
		}
	}