private string QueryExpansion(string input)
/*Expand the query from original word to synonym word list based on WORDNET library*/
{
string[] delim = { " " };
string[] words = input.Split(delim, StringSplitOptions.RemoveEmptyEntries);
Regex rgx = new Regex("[^a-zA-z]");
string result = input;
foreach (string word in words)
{
//get expansion here
List <string> synonyms = LuceneSearch_app.GetSynonym(stemmer.stemTerm(rgx.Replace(word, "")));
string temp = "";
foreach (string synonym in synonyms)
{
temp += " " + synonym;
}
if (word.StartsWith("\""))
{
result += temp;
}
else
{
result = result.Replace(word, (word + "^10" + temp));
}
}
return(result);
}
