tree d108b3775548aa6d68db0e451ab0052eb1e37f2f
parent 2f07ca8fe32e71c2b7ff32b49c203a23c5b24ce0
author Pavlin Radoslavov <pavlin@onlab.us> 1408136144 -0700
committer Gerrit Code Review <gerrit2@localhost> 1408389512 -0700

Cleanup the implementation of class TopologyEvent and associated classes.

The major addition is the new method TopologyEvent.getEventType() that
returns the type of the event: SWITCH, PORT, LINK, HOST, MASTERSHIP

* Refactor and move around the implementation of methods like
  hashCode() equals() and toString()

* Remove method getID() from classes MastershipEvent, SwitchEvent, PortEvent
  LinkEvent, HostEvent, and keep it only in TopologyEvent where it is
  actually needed.

* Changed class TopologyElement to abstract, and added two abstract
  methods: getOriginDpid() and getIDasByteBuffer() which are already
  implemented by all FooEvent derived classes.

No functional changes.

Change-Id: I62f4723cb3f4b519f365c04e7b736abda9b1973b