+ /**
+ * Get the position ID of the latest journal entry at some point in time
+ *
+ * @param $time integer|string timestamp
+ * @return integer|false
+ */
+ final public function getPositionAtTime( $time ) {
+ return $this->doGetPositionAtTime( $time );
+ }
+
+ /**
+ * @see FileJournal::getPositionAtTime()
+ * @param $time integer|string timestamp
+ * @return integer|false
+ */
+ abstract protected function doGetPositionAtTime( $time );
+