public Result Search (string term, int count, int start) {
try {
term = term.ToLower ();
Term htTerm = new Term ("hottext", term);
Query qq1 = new FuzzyQuery (htTerm);
Query qq2 = new TermQuery (htTerm);
qq2.SetBoost (10f);
Query qq3 = new PrefixQuery (htTerm);
qq3.SetBoost (10f);
DisjunctionMaxQuery q1 = new DisjunctionMaxQuery (0f);
q1.Add (qq1);
q1.Add (qq2);
q1.Add (qq3);
Query q2 = new TermQuery (new Term ("text", term));
q2.SetBoost (3f);
Query q3 = new TermQuery (new Term ("examples", term));
q3.SetBoost (3f);
DisjunctionMaxQuery q = new DisjunctionMaxQuery (0f);
q.Add (q1);
q.Add (q2);
q.Add (q3);
TopDocs top = SearchInternal (q, count, start);
Result r = new Result (term, searcher, top.ScoreDocs);
Results.Add (r);
return r;
} catch (IOException) {
Console.WriteLine ("No index in {0}", dir);
return null;
}
}
public override Query Rewrite(IndexReader reader, MultiTermQuery query)
{
FilteredTermEnum enumerator = query.GetEnum(reader);
BooleanQuery result = new BooleanQuery(true);
int count = 0;
try
{
do
{
Term t = enumerator.Term();
if (t != null)
{
TermQuery tq = new TermQuery(t); // found a match
tq.SetBoost(query.GetBoost() * enumerator.Difference()); // set the boost
result.Add(tq, BooleanClause.Occur.SHOULD); // add to query
count++;
}
}while (enumerator.Next());
}
finally
{
enumerator.Close();
}
query.IncTotalNumberOfTerms(count);
return(result);
}
public override Weight CreateWeight(Searcher searcher)
{
if (terms.Count == 1)
{
// optimize one-term case
Term term = (Term)terms[0];
Query termQuery = new TermQuery(term);
termQuery.SetBoost(GetBoost());
return(termQuery.CreateWeight(searcher));
}
return(new PhraseWeight(this, searcher));
}
public override Query Rewrite(IndexReader reader)
{
if (!termLongEnough)
{
// can only match if it's exact
return new TermQuery(term);
}
FilteredTermEnum enumerator = GetEnum(reader);
int maxClauseCount = BooleanQuery.GetMaxClauseCount();
ScoreTermQueue stQueue = new ScoreTermQueue(maxClauseCount);
ScoreTerm reusableST = null;
try
{
do
{
float score = 0.0f;
Term t = enumerator.Term();
if (t != null)
{
score = enumerator.Difference();
if (reusableST == null)
{
reusableST = new ScoreTerm(t, score);
}
else if (score >= reusableST.score)
{
// reusableST holds the last "rejected" entry, so, if
// this new score is not better than that, there's no
// need to try inserting it
reusableST.score = score;
reusableST.term = t;
}
else
{
continue;
}
reusableST = (ScoreTerm) stQueue.InsertWithOverflow(reusableST);
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
BooleanQuery query = new BooleanQuery(true);
int size = stQueue.Size();
for (int i = 0; i < size; i++)
{
ScoreTerm st = (ScoreTerm) stQueue.Pop();
TermQuery tq = new TermQuery(st.term); // found a match
tq.SetBoost(GetBoost() * st.score); // set the boost
query.Add(tq, BooleanClause.Occur.SHOULD); // add to query
}
return query;
}
public override Query Rewrite(IndexReader reader)
{
if (!termLongEnough)
{
// can only match if it's exact
return(new TermQuery(term));
}
FilteredTermEnum enumerator = GetEnum(reader);
int maxClauseCount = BooleanQuery.GetMaxClauseCount();
ScoreTermQueue stQueue = new ScoreTermQueue(maxClauseCount);
ScoreTerm reusableST = null;
try
{
do
{
float score = 0.0f;
Term t = enumerator.Term();
if (t != null)
{
score = enumerator.Difference();
if (reusableST == null)
{
reusableST = new ScoreTerm(t, score);
}
else if (score >= reusableST.score)
{
// reusableST holds the last "rejected" entry, so, if
// this new score is not better than that, there's no
// need to try inserting it
reusableST.score = score;
reusableST.term = t;
}
else
{
continue;
}
reusableST = (ScoreTerm)stQueue.InsertWithOverflow(reusableST);
}
}while (enumerator.Next());
}
finally
{
enumerator.Close();
}
BooleanQuery query = new BooleanQuery(true);
int size = stQueue.Size();
for (int i = 0; i < size; i++)
{
ScoreTerm st = (ScoreTerm)stQueue.Pop();
TermQuery tq = new TermQuery(st.term); // found a match
tq.SetBoost(GetBoost() * st.score); // set the boost
query.Add(tq, BooleanClause.Occur.SHOULD); // add to query
}
return(query);
}
public override Query Rewrite(IndexReader reader, MultiTermQuery query)
{
FilteredTermEnum enumerator = query.GetEnum(reader);
BooleanQuery result = new BooleanQuery(true);
int count = 0;
try
{
do
{
Term t = enumerator.Term();
if (t != null)
{
TermQuery tq = new TermQuery(t); // found a match
tq.SetBoost(query.GetBoost() * enumerator.Difference()); // set the boost
result.Add(tq, BooleanClause.Occur.SHOULD); // add to query
count++;
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
query.IncTotalNumberOfTerms(count);
return result;
}
public override Weight CreateWeight(Searcher searcher)
{
if (terms.Count == 1)
{
// optimize one-term case
Term term = (Term) terms[0];
Query termQuery = new TermQuery(term);
termQuery.SetBoost(GetBoost());
return termQuery.CreateWeight(searcher);
}
return new PhraseWeight(this, searcher);
}