Lucene.Net.Index.SegmentMerger.CreateCompoundFile C# (CSharp) Method

        public /*internal*/ ICollection<string> CreateCompoundFile(System.String fileName)
        {
            ICollection<string> files = GetMergedFiles();
            CompoundFileWriter cfsWriter = new CompoundFileWriter(directory, fileName, checkAbort);

			// Now merge all added files
			foreach(var file in files)
			{
				cfsWriter.AddFile(file);
			}
			
			// Perform the merge
			cfsWriter.Close();

            return files;
		}

        /// <summary>Merges the named range of segments, replacing them in the stack with a
        /// single segment.
        /// </summary>
        private void  MergeSegments(int minSegment, int end)
        {
            System.String mergedName = NewSegmentName();
            if (infoStream != null)
            {
                infoStream.Write("merging segments");
            }
            SegmentMerger merger = new SegmentMerger(this, mergedName);

            System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
            for (int i = minSegment; i < end; i++)
            {
                SegmentInfo si = segmentInfos.Info(i);
                if (infoStream != null)
                {
                    infoStream.Write(" " + si.name + " (" + si.docCount + " docs)");
                }
                IndexReader reader = SegmentReader.Get(si);
                merger.Add(reader);
                if ((reader.Directory() == this.directory) || (reader.Directory() == this.ramDirectory))
                {
                    segmentsToDelete.Add(reader);                     // queue segment for deletion
                }
            }

            int mergedDocCount = merger.Merge();

            if (infoStream != null)
            {
                infoStream.WriteLine(" into " + mergedName + " (" + mergedDocCount + " docs)");
            }

            for (int i = end - 1; i >= minSegment; i--)
            {
                // remove old infos & add new
                segmentInfos.RemoveAt(i);
            }
            segmentInfos.Add(new SegmentInfo(mergedName, mergedDocCount, directory));

            // close readers before we attempt to delete now-obsolete segments
            merger.CloseReaders();

            lock (directory)
            {
                // in- & inter-process sync
                new AnonymousClassWith3(segmentsToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
            }

            if (useCompoundFile)
            {
                System.Collections.ArrayList filesToDelete = merger.CreateCompoundFile(mergedName + ".tmp");
                lock (directory)
                {
                    // in- & inter-process sync
                    new AnonymousClassWith4(mergedName, filesToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
                }
            }
        }