DataTable search(string textSearch)
{
var table = Sample.Clone();
var Index = createIndex(Sample);
using (var reader = IndexReader.Open(Index, true))
using (var searcher = new IndexSearcher(reader))
{
using (Analyzer analyzer = new Lucene.Net.Analysis.Snowball.SnowballAnalyzer(Lucene.Net.Util.Version.LUCENE_30, "English"))
{
var queryParser = new QueryParser(Version.LUCENE_30, "FullText", analyzer);
queryParser.AllowLeadingWildcard = true;
var query = queryParser.Parse(textSearch);
var collector = TopScoreDocCollector.Create(1000, true);
searcher.Search(query, collector);
var matches = collector.TopDocs().ScoreDocs;
foreach (var item in matches)
{
var id = item.Doc;
var doc = searcher.Doc(id);
var row = table.NewRow();
row["relevance"] = doc.GetField("relevance").StringValue;
row["prefix"] = doc.GetField("prefix").StringValue;
row["exact"] = doc.GetField("exact").StringValue;
row["suffix"] = doc.GetField("suffix").StringValue;
row["Description_Id"] = doc.GetField("Description_Id").StringValue;
table.Rows.Add(row);
}
}
}
return(table);
}
Directory createIndex(DataTable table)
{
var directory = new RAMDirectory();
using (Analyzer analyzer = new Lucene.Net.Analysis.Snowball.SnowballAnalyzer(Lucene.Net.Util.Version.LUCENE_30, "English"))
using (var writer = new IndexWriter(directory, analyzer, new IndexWriter.MaxFieldLength(1000)))
{ // the writer and analyzer will popuplate the directory with documents
foreach (DataRow row in table.Rows)
{
var document = new Document();
document.Add(new Field("relevance", row["relevance"].ToString(), Field.Store.YES, Field.Index.ANALYZED));
document.Add(new Field("prefix", row["prefix"].ToString(), Field.Store.YES, Field.Index.ANALYZED));
document.Add(new Field("exact", row["exact"].ToString(), Field.Store.YES, Field.Index.ANALYZED));
document.Add(new Field("suffix", row["suffix"].ToString(), Field.Store.YES, Field.Index.ANALYZED));
document.Add(new Field("Description_Id", row["Description_Id"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));
//var date = row["BirthDate"].ToString();
//date = string.Format("{0} {1}", date, date.Replace("/", " / "));
document.Add(new Field("FullText",
string.Format("{0} {1} {2} {3} {4}", row["relevance"], row["prefix"], row["exact"], row["suffix"], row["Description_Id"])
, Field.Store.YES, Field.Index.ANALYZED));
writer.AddDocument(document);
}
writer.Optimize();
writer.Flush(true, true, true);
}
return(directory);
}
// TODO: Allow language also to be passed
public SnowballAnalyzer()
{
Analyzer = new Lucene.Net.Analysis.Snowball.SnowballAnalyzer(SearchSettings.Instance.LuceneVersion, SearchSettings.Instance.Language, StopWords.DefaultEnglish);
}
public SnowballAnalyzer(SearchSettings settings)
{
this._settings = settings;
Analyzer = new Lucene.Net.Analysis.Snowball.SnowballAnalyzer(this._settings.LuceneVersion, this._settings.Language, StopWords.DefaultEnglish);
}