return null;
}
// Get first, last, and mid keys. Midkey is the key that starts block
// in middle of hfile. Has column and timestamp. Need to return just
// the row we want to split on as midkey.
byte [] midkey = r.midkey();
if (midkey != null) {
KeyValue mk = KeyValue.createKeyValueFromKey(midkey, 0, midkey.length);
byte [] fk = r.getFirstKey();
KeyValue firstKey = KeyValue.createKeyValueFromKey(fk, 0, fk.length);
byte [] lk = r.getLastKey();