private Hashtable GetOriginalValues()
{
Hashtable originalValues = new Hashtable();
MoreLikeThis mlt = new MoreLikeThis(reader);
mlt.SetMinDocFreq(1);
mlt.SetMinTermFreq(1);
mlt.SetMinWordLen(1);
mlt.SetFieldNames(new String[] { "text" });
mlt.SetBoost(true);
BooleanQuery query = (BooleanQuery)mlt.Like(new System.IO.StringReader("lucene release"));
IList clauses = query.Clauses();
for (int i = 0; i < clauses.Count; i++)
{
BooleanClause clause = (BooleanClause)clauses[i];
TermQuery tq = (TermQuery)clause.GetQuery();
originalValues.Add(tq.GetTerm().Text(), tq.GetBoost());
}
return(originalValues);
}
public void TestBoostFactor()
{
Hashtable originalValues = GetOriginalValues();
MoreLikeThis mlt = new MoreLikeThis(
reader);
mlt.SetMinDocFreq(1);
mlt.SetMinTermFreq(1);
mlt.SetMinWordLen(1);
mlt.SetFieldNames(new String[] { "text" });
mlt.SetBoost(true);
// this mean that every term boost factor will be multiplied by this
// number
float boostFactor = 5;
mlt.SetBoostFactor(boostFactor);
BooleanQuery query = (BooleanQuery)mlt.Like(new System.IO.StringReader("lucene release"));
IList clauses = query.Clauses();
Assert.AreEqual(originalValues.Count, clauses.Count, "Expected " + originalValues.Count + " clauses.");
for (int i = 0; i < clauses.Count; i++)
{
BooleanClause clause = (BooleanClause)clauses[i];
TermQuery tq = (TermQuery)clause.GetQuery();
float termBoost = (float)originalValues[tq.GetTerm().Text()];
Assert.IsNotNull(termBoost, "Expected term " + tq.GetTerm().Text());
float totalBoost = termBoost * boostFactor;
Assert.AreEqual(totalBoost, tq.GetBoost(), 0.0001, "Expected boost of " + totalBoost + " for term '"
+ tq.GetTerm().Text() + "' got " + tq.GetBoost());
}
}
public void TestBoostFactor()
{
Hashtable originalValues = GetOriginalValues();
MoreLikeThis mlt = new MoreLikeThis(
reader);
mlt.SetMinDocFreq(1);
mlt.SetMinTermFreq(1);
mlt.SetMinWordLen(1);
mlt.SetFieldNames(new String[] { "text" });
mlt.SetBoost(true);
// this mean that every term boost factor will be multiplied by this
// number
float boostFactor = 5;
mlt.SetBoostFactor(boostFactor);
BooleanQuery query = (BooleanQuery)mlt.Like(new System.IO.StringReader("lucene release"));
IList clauses = query.Clauses();
Assert.AreEqual(originalValues.Count, clauses.Count,"Expected " + originalValues.Count + " clauses.");
for (int i = 0; i < clauses.Count; i++)
{
BooleanClause clause = (BooleanClause)clauses[i];
TermQuery tq = (TermQuery)clause.GetQuery();
float termBoost = (float)originalValues[tq.GetTerm().Text()];
Assert.IsNotNull(termBoost,"Expected term " + tq.GetTerm().Text());
float totalBoost = termBoost * boostFactor;
Assert.AreEqual(totalBoost, tq.GetBoost(), 0.0001,"Expected boost of " + totalBoost + " for term '"
+ tq.GetTerm().Text() + "' got " + tq.GetBoost());
}
}
private Hashtable GetOriginalValues()
{
Hashtable originalValues = new Hashtable();
MoreLikeThis mlt = new MoreLikeThis(reader);
mlt.SetMinDocFreq(1);
mlt.SetMinTermFreq(1);
mlt.SetMinWordLen(1);
mlt.SetFieldNames(new String[] { "text" });
mlt.SetBoost(true);
BooleanQuery query = (BooleanQuery)mlt.Like(new System.IO.StringReader("lucene release"));
IList clauses = query.Clauses();
for (int i = 0; i < clauses.Count; i++)
{
BooleanClause clause = (BooleanClause)clauses[i];
TermQuery tq = (TermQuery)clause.GetQuery();
originalValues.Add(tq.GetTerm().Text(), tq.GetBoost());
}
return originalValues;
}
