Javadoc
Return the Version
reading from given
DataInput as
serialized by
#writeOrdinal(DataOutput,boolean).
If the incoming ordinal is greater than or equal to current ordinal then
this will return null or
#CURRENT indicating that version is same
as that of
#CURRENT assuming that peer will support this JVM.
This method is not meant to be used for client-server protocol since
servers cannot support higher version clients, rather is only meant for
P2P/JGroups messaging where a mixed version of servers can be running at
the same time. Similarly cannot be used when recovering from disk since
higher version data cannot be read.