Lucene .Net

lucene search.cs

    public class HotelSearch
    {
        public static String IndexFolder => Sitecore.Configuration.Settings.DataFolder.EndsWith("\\")
            ? Sitecore.Configuration.Settings.DataFolder + "indexes\\hotel_index"
            : Sitecore.Configuration.Settings.DataFolder + "\\indexes\\hotel_index";

        public void BuildIndex(HotelProperty[] datas)
        {
            var dataFolder = IndexFolder;
            if (!Directory.Exists(dataFolder))
            {
                Directory.CreateDirectory(dataFolder);
            }
            var analyzer = new StandardAnalyzer(Version.LUCENE_30);
            var fs = new SimpleFSDirectory(new DirectoryInfo(dataFolder), new NoLockFactory());
            using (var writer = new IndexWriter(fs, analyzer, true, IndexWriter.MaxFieldLength.UNLIMITED))
            {
                var langs = LanguageCache.GetCacheData();
                foreach (var data in datas)
                {
                    var doc = new Document();
                    doc.Add(new Field("ID", data.Id.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));
                    foreach (var lang in langs)
                    {
                        doc.Add(new Field(lang.Alias + "_name", data.DisplayNames[lang.Locale], Field.Store.YES,
                            Field.Index.ANALYZED));
                        doc.Add(new Field(lang.Alias + "_city", data.Address.CityNames[lang.Locale], Field.Store.YES,
                            Field.Index.ANALYZED));
                        doc.Add(new Field(lang.Alias + "_country", data.Address.CountryNames[lang.Locale], Field.Store.YES,
                            Field.Index.ANALYZED));
                    }
                    writer.AddDocument(doc);
                }
                writer.Optimize();
                writer.Flush(true, false, true);
                writer.Dispose();
            }
        }

        public List<Guid> SearchHotel(string keywords)
        {
            var analyzer = new StandardAnalyzer(Version.LUCENE_30);
            var searcher = new IndexSearcher(new SimpleFSDirectory(new DirectoryInfo(IndexFolder)));
            var langs = LanguageCache.GetCacheData();
            var list = new List<String>();
            foreach (var lang in langs)
            {
                list.Add(lang.Alias + "_name");
                list.Add(lang.Alias + "_city");
                list.Add(lang.Alias + "_country");
            }
            var parser = new MultiFieldQueryParser(Version.LUCENE_30, list.ToArray(), analyzer)
            {
                DefaultOperator = QueryParser.Operator.AND
            };
            var query = parser.Parse(keywords);
            var hits = searcher.Search(query, 120);
            return hits.ScoreDocs.OrderByDescending(x => x.Score).Select(hit => Guid.Parse(searcher.Doc(hit.Doc).Get("ID"))).ToList();
        }
    }