private static long GetWorkHashCode(LuceneWorker.WorkWithPayload luceneWork)
{
IDirectoryProvider provider = luceneWork.Provider;
int h = provider.GetType().GetHashCode();
h = (31 * h) + provider.GetHashCode();
long extendedHash = h; // to be sure extendedHash + 1 < extendedHash + 2 is always true
if (luceneWork.Work is AddLuceneWork)
{
extendedHash += 1; // addwork after deleteWork
}
if (luceneWork.Work is OptimizeLuceneWork)
{
extendedHash += 2; // optimize after everything
}
return(extendedHash);
}