+ * @return Returns the mapping found in the Mapping System or null if nothing is found.
+ */
+ MappingData getMapping(Eid srcKey, Eid dstKey);
+
+ /**
+ * Retrieves widest negative prefix found in the Mapping System for given key.
+ *
+ * @param key
+ * Key being looked up
+ * @return Returns the widest negative prefix or null if nothing is found.
+ */
+ Eid getWidestNegativePrefix(Eid key);
+
+ /**
+ * Refresh southbound mapping registration timestamp.
+ *
+ * @param key
+ * The EID whose registration must be refreshed
+ * @param xtrId
+ * xTR-ID of the mapping to be refreshed
+ * @param timestamp
+ * New timestamp for the mapping