// Method to take users query text as input
// and does various things to it to produce
// the a query that is input to the searcher
private Query PreprocessQuery(string origText, QueryParser parser)
{
// builds a boolean query
// partA is just the original query text
string partA = origText;
// partB is bi- and tri-grams built from the original text
// build ngrams
int ngram_num = 3;
List <string> tokens = TextProcessing.TokeniseString(origText);
List <string> ngrams = TextProcessing.getNGrams(tokens, ngram_num);
string partB = string.Join(" ", ngrams);
// Build BooleanQuery
BooleanQuery bQuery = new BooleanQuery();
Query queryA = parser.Parse(partA);
Query queryB = parser.Parse(partB);
bQuery.Add(queryA, Occur.MUST);
bQuery.Add(queryB, Occur.MUST);
return(bQuery);
}
// provide the results summary info for results view
public override string[] GetResultSummary()
{
return(new string[] { title, author, biblioInfo, TextProcessing.GetFirstSentence(words) });
}