static void Main(string[] args)
{
Directory dir = new RAMDirectory();
CreateDocuments(dir);
IndexReader reader = IndexReader.Open(dir, true);
var searcher = new IndexSearcher(reader);
int numDocs = reader.MaxDoc;
var mlt = new Lucene.Net.Search.Similar.MoreLikeThis(reader);
mlt.SetFieldNames(new String[] { "name" });
mlt.MinTermFreq = 1;
mlt.MinDocFreq = 1;
for (int docId = 0; docId < numDocs; docId++)
{
Document doc = reader.Document(docId);
Console.WriteLine(doc.Get("name"));
Query query = mlt.Like(docId);
Console.WriteLine(" query = {0}", query);
TopDocs similarDocs = searcher.Search(query, 10);
if (similarDocs.TotalHits == 0)
{
Console.WriteLine(" None like this");
}
for (int i = 0; i < similarDocs.ScoreDocs.Length; i++)
{
if (similarDocs.ScoreDocs[i].Doc != docId)
{
doc = reader.Document(similarDocs.ScoreDocs[i].Doc);
Console.WriteLine(" -> {0}", doc.Get("name"));
}
}
Console.WriteLine();
}
searcher.Dispose();
reader.Dispose();
dir.Dispose();
}
private static void AssignParameters(Lucene.Net.Search.Similar.MoreLikeThis mlt, MoreLikeThisQuery parameters)
{
if (parameters.Boost != null)
{
mlt.Boost = parameters.Boost.Value;
}
if (parameters.BoostFactor != null)
{
mlt.BoostFactor = parameters.BoostFactor.Value;
}
if (parameters.MaximumNumberOfTokensParsed != null)
{
mlt.MaxNumTokensParsed = parameters.MaximumNumberOfTokensParsed.Value;
}
if (parameters.MaximumQueryTerms != null)
{
mlt.MaxQueryTerms = parameters.MaximumQueryTerms.Value;
}
if (parameters.MinimumWordLength != null)
{
mlt.MinWordLen = parameters.MinimumWordLength.Value;
}
if (parameters.MaximumWordLength != null)
{
mlt.MaxWordLen = parameters.MaximumWordLength.Value;
}
if (parameters.MinimumTermFrequency != null)
{
mlt.MinTermFreq = parameters.MinimumTermFrequency.Value;
}
if (parameters.MinimumDocumentFrequency != null)
{
mlt.MinDocFreq = parameters.MinimumDocumentFrequency.Value;
}
if (parameters.MaximumDocumentFrequency != null)
{
mlt.MaxDocFreq = parameters.MaximumDocumentFrequency.Value;
}
if (parameters.MaximumDocumentFrequencyPercentage != null)
{
mlt.SetMaxDocFreqPct(parameters.MaximumDocumentFrequencyPercentage.Value);
}
}
