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

		public /*internal*/ int Merge()
		{
			return Merge(true);
		}
		

        private SegmentCommitInfo Merge(Directory dir, SegmentCommitInfo si1, SegmentCommitInfo si2, string merged, bool useCompoundFile)
        {
            IOContext     context = NewIOContext(Random);
            SegmentReader r1      = new SegmentReader(si1, DirectoryReader.DEFAULT_TERMS_INDEX_DIVISOR, context);
            SegmentReader r2      = new SegmentReader(si2, DirectoryReader.DEFAULT_TERMS_INDEX_DIVISOR, context);

            Codec codec = Codec.Default;
            TrackingDirectoryWrapper trackingDir = new TrackingDirectoryWrapper(si1.Info.Dir);
            SegmentInfo si = new SegmentInfo(si1.Info.Dir, Constants.LUCENE_MAIN_VERSION, merged, -1, false, codec, null);

            SegmentMerger merger = new SegmentMerger(new List <AtomicReader> {
                r1, r2
            }, si, InfoStream.Default, trackingDir, IndexWriterConfig.DEFAULT_TERM_INDEX_INTERVAL, CheckAbort.NONE, new FieldInfos.FieldNumbers(), context, true);

            MergeState mergeState = merger.Merge();

            r1.Dispose();
            r2.Dispose();
            SegmentInfo info = new SegmentInfo(si1.Info.Dir, Constants.LUCENE_MAIN_VERSION, merged, si1.Info.DocCount + si2.Info.DocCount, false, codec, null);

            info.SetFiles(new JCG.HashSet <string>(trackingDir.CreatedFiles));

            if (useCompoundFile)
            {
                ICollection <string> filesToDelete = IndexWriter.CreateCompoundFile(InfoStream.Default, dir, CheckAbort.NONE, info, NewIOContext(Random));
                info.UseCompoundFile = true;
                foreach (String fileToDelete in filesToDelete)
                {
                    si1.Info.Dir.DeleteFile(fileToDelete);
                }
            }

            return(new SegmentCommitInfo(info, 0, -1L, -1L));
        }