Javadoc
An EditsLoader can read a Hadoop EditLog file and walk over its
structure using the supplied EditsVisitor.
Each implementation of EditsLoader is designed to rapidly process an
edits log file. As long as minor changes are made from one layout version
to another, it is acceptable to tweak one implementation to read the next.
However, if the layout version changes enough that it would make a
processor slow or difficult to read, another processor should be created.
This allows each processor to quickly read an edits log without getting
bogged down in dealing with significant differences between layout versions.