private static IEnumerable <string> GetSearchTerms(string searchTerm)
{
List <string> result = new List <string>();
var analyzer = new PanGuAnalyzer();
StringReader sr = new StringReader(searchTerm);
TokenStream stream = analyzer.TokenStream(null, sr);
bool hasnext = stream.IncrementToken();
System.DateTime start = System.DateTime.Now;
ITermAttribute ita;
while (hasnext)
{
ita = stream.GetAttribute <ITermAttribute>();
result.Add(ita.Term);
hasnext = stream.IncrementToken();
}
stream.CloneAttributes();
sr.Close();
analyzer.Dispose();
var resultString = string.Join(" ", result);
return(resultString.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
.Concat(new[] { searchTerm })
.Distinct(StringComparer.OrdinalIgnoreCase)
.Select(Escape));
}