コード例 #1
0
        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);
        }
コード例 #2
0
        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);
        }
コード例 #3
0
 // TODO: Allow language also to be passed
 public SnowballAnalyzer()
 {
     Analyzer = new Lucene.Net.Analysis.Snowball.SnowballAnalyzer(SearchSettings.Instance.LuceneVersion, SearchSettings.Instance.Language, StopWords.DefaultEnglish);
 }
コード例 #4
0
 public SnowballAnalyzer(SearchSettings settings)
 {
     this._settings = settings;
     Analyzer       = new Lucene.Net.Analysis.Snowball.SnowballAnalyzer(this._settings.LuceneVersion, this._settings.Language, StopWords.DefaultEnglish);
 }