public override double stringDistance(String stringA, String stringB)
{
HashSet<string> ha = new HashSet<string>();
HashSet<string> hb = new HashSet<string>();
long pos = ms.Position;
tw.WriteLine(stringA);
tw.Flush();
ms.Position = pos;
Lucene.Net.Analysis.Token t = filt.Next();
while (t != null) {
ha.Add(t.TermText());
t = filt.Next();
}
pos = ms.Position;
tw.WriteLine(stringB);
tw.Flush();
ms.Position = pos;
Lucene.Net.Analysis.Token tb = filt.Next();
while (tb != null) {
hb.Add(tb.TermText());
tb = filt.Next();
}
double uc = ha.Union(hb).Count();
double ic = ha.Intersect(hb).Count();
return (uc - ic) / uc;
}
