Lucene.Net.Index.IndexReader.Open C# (CSharp) Method

		private static IndexReader Open(Directory directory, IndexDeletionPolicy deletionPolicy, IndexCommit commit, bool readOnly, int termInfosIndexDivisor)
		{
			return DirectoryReader.Open(directory, deletionPolicy, commit, readOnly, termInfosIndexDivisor);
		}
		

        public virtual void  TestFarsi()
        {
            /* build an index */
            RAMDirectory farsiIndex = new RAMDirectory();
            IndexWriter  writer     = new IndexWriter(farsiIndex, new SimpleAnalyzer(), T, IndexWriter.MaxFieldLength.LIMITED, null);
            Document     doc        = new Document();

            doc.Add(new Field("content", "\u0633\u0627\u0628", Field.Store.YES, Field.Index.NOT_ANALYZED));
            doc.Add(new Field("body", "body", Field.Store.YES, Field.Index.NOT_ANALYZED));
            writer.AddDocument(doc, null);

            writer.Optimize(null);
            writer.Close();

            IndexReader   reader = IndexReader.Open((Directory)farsiIndex, true, null);
            IndexSearcher search = new IndexSearcher(reader);
            Query         q      = new TermQuery(new Term("body", "body"));

            // Neither Java 1.4.2 nor 1.5.0 has Farsi Locale collation available in
            // RuleBasedCollator.  However, the Arabic Locale seems to order the Farsi
            // characters properly.
            System.Globalization.CompareInfo collator = new System.Globalization.CultureInfo("ar").CompareInfo;

            // Unicode order would include U+0633 in [ U+062F - U+0698 ], but Farsi
            // orders the U+0698 character before the U+0633 character, so the single
            // index Term below should NOT be returned by a TermRangeFilter with a Farsi
            // Collator (or an Arabic one for the case when Farsi is not supported).
            int numHits = search.Search(q, new TermRangeFilter("content", "\u062F", "\u0698", T, T, collator), 1000, null).TotalHits;

            Assert.AreEqual(0, numHits, "The index Term should not be included.");

            numHits = search.Search(q, new TermRangeFilter("content", "\u0633", "\u0638", T, T, collator), 1000, null).TotalHits;
            Assert.AreEqual(1, numHits, "The index Term should be included.");
            search.Close();
        }