Github user omalley commented on the issue:
https://github.com/apache/orc/pull/151
Ok, this is generally good. A couple of points that I'll fix as part of
committing:
* the API should use specific types (eg. uint32_t instead of int)
* since the enums are for serialization, I think it will be clearer if we
assign explicit values for them
* if the footer doesn't have a writerId, it is ORC_JAVA_WRITER and not an
exception---
