private static uint FindDocId(IBaseWindow baseWin, WritableDatabase database, string xref)
{
uint result;
string key = "Q" + GetSign(baseWin) + "_" + xref;
using (PostingIterator p = database.PostListBegin(key)) {
if (p == database.PostListEnd(key))
{
result = 0; // 0 - is invalid docid (see XapianManual)
}
else
{
result = p.GetDocId();
}
}
return(result);
}