@Override
protected int compareHeaders(Headers lhs, Headers rhs) {
return compare(lhs.get(FileVersion.FILE_VERSION), rhs.get(FileVersion.FILE_VERSION));
}
@Override
protected long version(Headers headers) {
return headers == null ? FileVersion.INITIAL_TX_ID : headers.get(FileVersion.FILE_VERSION).txId;
}
@Override
protected Headers initialHeaders(long txId) {
return Headers.headersBuilder().put(FileVersion.FILE_VERSION, new FileVersion(txId)).headers();
}