To get the tag number of a protocol buffer enum, use getNumber() instead.
The generated Java source files for Protocol Buffer enums have getNumber() as
accessors for the tag number in the protobuf file.
In addition, since it’s a java enum, it also has the ordinal() method,
returning its positional index within the generated java enum.
The ordinal() order of the generated Java enums isn’t guaranteed, and can
change when a new enum value is inserted into a proto enum. The getNumber()
value won’t change for an enum value (since making that change is a
backwards-incompatible change for the protocol buffer).
You should very likely use getNumber() in preference to ordinal() in all
circumstances since it’s a more stable value.
Note: If you’re changing code that was already using ordinal(), it’s likely that
getNumber() will return a different real value. Tread carefully to avoid
mismatches if the ordinal was persisted elsewhere.
Suppress false positives by adding an @SuppressWarnings("ProtocolBufferOrdinal") annotation to the enclosing element.