public override Query Rewrite(Monodoc.Lucene.Net.Index.IndexReader reader)
{
BooleanQuery query = new BooleanQuery();
TermEnum enumerator = reader.Terms(prefix);
try
{
System.String prefixText = prefix.Text();
System.String prefixField = prefix.Field();
do
{
Term term = enumerator.Term();
if (term != null && term.Text().StartsWith(prefixText) && (System.Object) term.Field() == (System.Object) prefixField)
{
TermQuery tq = new TermQuery(term); // found a match
tq.SetBoost(GetBoost()); // set the boost
query.Add(tq, false, false); // add to query
//System.out.println("added " + term);
}
else
{
break;
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
return query;
}
/// <summary> FIXME: Describe <code>rewrite</code> method here.
///
/// </summary>
/// <param name="reader">an <code>Monodoc.Lucene.Net.Index.IndexReader</code> value
/// </param>
/// <returns> a <code>Query</code> value
/// </returns>
/// <exception cref=""> IOException if an error occurs
/// </exception>
public override Query Rewrite(Monodoc.Lucene.Net.Index.IndexReader reader)
{
BooleanQuery query = new BooleanQuery();
TermEnum enumerator = reader.Terms(lowerTerm);
try
{
bool checkLower = false;
if (!inclusive)
// make adjustments to set to exclusive
checkLower = true;
System.String testField = GetField();
do
{
Term term = enumerator.Term();
if (term != null && (System.Object) term.Field() == (System.Object) testField)
{
if (!checkLower || String.CompareOrdinal(term.Text(), lowerTerm.Text()) > 0)
{
checkLower = false;
if (upperTerm != null)
{
int compare = String.CompareOrdinal(upperTerm.Text(), term.Text());
/* if beyond the upper term, or is exclusive and
* this is equal to the upper term, break out */
if ((compare < 0) || (!inclusive && compare == 0))
break;
}
TermQuery tq = new TermQuery(term); // found a match
tq.SetBoost(GetBoost()); // set the boost
query.Add(tq, false, false); // add to query
}
}
else
{
break;
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
return query;
}
//
// Search the index with term
//
public Result Search (string term) {
try {
Query q1 = QueryParser.Parse (term, "hottext", new StandardAnalyzer ());
Query q2 = QueryParser.Parse (term, "text", new StandardAnalyzer ());
q2.SetBoost (0.7f);
Query q3 = QueryParser.Parse (term, "examples", new StandardAnalyzer ());
q3.SetBoost (0.5f);
BooleanQuery q = new BooleanQuery();
q.Add (q1, false, false);
q.Add (q2, false, false);
q.Add (q3, false, false);
Hits hits = searcher.Search(q);
Result r = new Result (term, hits);
Results.Add (r);
return r;
} catch (IOException) {
Console.WriteLine ("No index in {0}", dir);
return null;
}
}
public override Query Rewrite(Monodoc.Lucene.Net.Index.IndexReader reader)
{
FilteredTermEnum enumerator = GetEnum(reader);
BooleanQuery query = new BooleanQuery();
try
{
do
{
Term t = enumerator.Term();
if (t != null)
{
TermQuery tq = new TermQuery(t); // found a match
tq.SetBoost(GetBoost() * enumerator.Difference()); // set the boost
query.Add(tq, false, false); // add to query
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
return query;
}
public BooleanWeight(BooleanQuery enclosingInstance, Searcher searcher)
{
InitBlock(enclosingInstance);
this.searcher = searcher;
for (int i = 0; i < Enclosing_Instance.clauses.Count; i++)
{
BooleanClause c = (BooleanClause) Enclosing_Instance.clauses[i];
weights.Add(c.query.CreateWeight(searcher));
}
}
private void InitBlock(BooleanQuery enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
protected internal override Weight CreateWeight(Searcher searcher)
{
if (termArrays.Count == 1)
{
// optimize one-term case
Term[] terms = (Term[]) termArrays[0];
BooleanQuery boq = new BooleanQuery();
for (int i = 0; i < terms.Length; i++)
{
boq.Add(new TermQuery(terms[i]), false, false);
}
boq.SetBoost(GetBoost());
return boq.CreateWeight(searcher);
}
return new PhrasePrefixWeight(this, searcher);
}
/// <summary>Expert: merges the clauses of a set of BooleanQuery's into a single
/// BooleanQuery.
///
/// <p>A utility for use by {@link #Combine(Query[])} implementations.
/// </summary>
public static Query MergeBooleanQueries(Query[] queries)
{
System.Collections.Hashtable allClauses = new System.Collections.Hashtable();
for (int i = 0; i < queries.Length; i++)
{
BooleanClause[] clauses = ((BooleanQuery) queries[i]).GetClauses();
for (int j = 0; j < clauses.Length; j++)
{
allClauses.Add(clauses[j], clauses[j]);
}
}
BooleanQuery result = new BooleanQuery();
foreach (BooleanClause booleanClause in allClauses.Keys)
{
result.Add(booleanClause);
}
return result;
}
/// <summary> Factory method for generating query, given a set of clauses.
/// By default creates a boolean query composed of clauses passed in.
///
/// Can be overridden by extending classes, to modify query being
/// returned.
///
/// </summary>
/// <param name="clauses">Vector that contains {@link BooleanClause} instances
/// to join.
///
/// </param>
/// <returns> Resulting {@link Query} object.
/// </returns>
/// <exception cref=""> ParseException throw in overridden method to disallow
/// </exception>
protected internal virtual Query GetBooleanQuery(System.Collections.ArrayList clauses)
{
BooleanQuery query = new BooleanQuery();
for (int i = 0; i < clauses.Count; i++)
{
query.Add((BooleanClause) clauses[i]);
}
return query;
}
