Lucene.Net.Index.SegmentInfos.Write3xInfo C# (CSharp) Method

        public static string Write3xInfo(Directory dir, SegmentInfo si, IOContext context)
        {
            // NOTE: this is NOT how 3.x is really written...
            string fileName = IndexFileNames.SegmentFileName(si.Name, "", Lucene3xSegmentInfoFormat.UPGRADED_SI_EXTENSION);
            si.AddFile(fileName);

            //System.out.println("UPGRADE write " + fileName);
            bool success = false;
            IndexOutput output = dir.CreateOutput(fileName, context);
            try
            {
                // we are about to write this SI in 3.x format, dropping all codec information, etc.
                // so it had better be a 3.x segment or you will get very confusing errors later.
                if ((si.Codec is Lucene3xCodec) == false)
                {
                    throw new InvalidOperationException("cannot write 3x SegmentInfo unless codec is Lucene3x (got: " + si.Codec + ")");
                }

                CodecUtil.WriteHeader(output, Lucene3xSegmentInfoFormat.UPGRADED_SI_CODEC_NAME, Lucene3xSegmentInfoFormat.UPGRADED_SI_VERSION_CURRENT);
                // Write the Lucene version that created this segment, since 3.1
                output.WriteString(si.Version);
                output.WriteInt(si.DocCount);

                output.WriteStringStringMap(si.Attributes());

                output.WriteByte((byte)(sbyte)(si.UseCompoundFile ? SegmentInfo.YES : SegmentInfo.NO));
                output.WriteStringStringMap(si.Diagnostics);
                output.WriteStringSet(si.Files);

                output.Dispose();

                success = true;
            }
            finally
            {
                if (!success)
                {
                    IOUtils.CloseWhileHandlingException(output);
                    try
                    {
                        si.Dir.DeleteFile(fileName);
                    }
                    catch (Exception)
                    {
                        // Suppress so we keep throwing the original exception
                    }
                }
            }

            return fileName;
        }