BzReader.Indexer.GuessAnalyzer C# (CSharp) Method

        private Analyzer GuessAnalyzer(string filePath,out bool isRTL)
        {
            Analyzer ret = null;
            isRTL = false;

            switch (Path.GetFileName(filePath).Substring(0, 2).ToLowerInvariant())
            {
                case "zh":
                    ret = new ChineseAnalyzer();
                    break;
                case "cs":
                    ret = new CzechAnalyzer();
                    break;
                case "da":
                    ret = new SnowballAnalyzer("Danish");
                    break;
                case "nl":
                    ret = new SnowballAnalyzer("Dutch");
                    break;
                case "en":
                    ret = new SnowballAnalyzer("English");
                    break;
                case "fi":
                    ret = new SnowballAnalyzer("Finnish");
                    break;
                case "fr":
                    ret = new SnowballAnalyzer("French");
                    break;
                case "de":
                    ret = new SnowballAnalyzer("German");
                    break;
                case "it":
                    ret = new SnowballAnalyzer("Italian");
                    break;
                case "ja":
                    ret = new CJKAnalyzer();
                    break;
                case "ko":
                    ret = new CJKAnalyzer();
                    break;
                case "no":
                    ret = new SnowballAnalyzer("Norwegian");
                    break;
                case "pt":
                    ret = new SnowballAnalyzer("Portuguese");
                    break;
                case "ru":
                    ret = new SnowballAnalyzer("Russian");
                    break;
                case "es":
                    ret = new SnowballAnalyzer("Spanish");
                    break;
                case "se":
                    ret = new SnowballAnalyzer("Swedish");
                    break;
                case "ar":
                    isRTL = true;
                    // TODO: Lucene 2.9 has a light stemmer for Arabic providing good search results
                    ret = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29);
                    break;
                case "he":
                    {
                        isRTL = true;
                        string hspellPath = System.Configuration.ConfigurationManager.AppSettings["hspellPath"];
                        if (!string.IsNullOrEmpty(hspellPath) && Directory.Exists(hspellPath))
                        {
                            try
                            {
                                ret = new Lucene.Net.Analysis.Hebrew.MorphAnalyzer(hspellPath);
                                break;
                            }
                            catch
                            {
                            }
                        }
                        ret = new Lucene.Net.Analysis.Hebrew.SimpleAnalyzer();
                        break;
                    }
                default:
                    ret = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29);
                    break;
            }

            return ret;
        }