C# SegmentInfos.RemoveAt方法代码示例

		/// <summary> Merges the named range of segments, replacing them in the stack with a
		/// single segment.
		/// </summary>
		private int MergeSegments(SegmentInfos sourceSegments, int minSegment, int end)
		{
			
			// We may be called solely because there are deletes
			// pending, in which case doMerge is false:
			bool doMerge = end > 0;
			System.String mergedName = NewSegmentName();
			SegmentMerger merger = null;
			
			System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
			
			System.String segmentsInfosFileName = segmentInfos.GetCurrentSegmentFileName();
			System.String nextSegmentsFileName = segmentInfos.GetNextSegmentFileName();
			
			SegmentInfo newSegment = null;
			
			int mergedDocCount = 0;
			
			// This is try/finally to make sure merger's readers are closed:
			try
			{
				
				if (doMerge)
				{
					if (infoStream != null)
						infoStream.Write("merging segments");
					merger = new SegmentMerger(this, mergedName);
					
					for (int i = minSegment; i < end; i++)
					{
						SegmentInfo si = sourceSegments.Info(i);
						if (infoStream != null)
							infoStream.Write(" " + si.name + " (" + si.docCount + " docs)");
						IndexReader reader = SegmentReader.Get(si); // no need to
						// set deleter
						// (yet)
						merger.Add(reader);
						if ((reader.Directory() == this.directory) || (reader.Directory() == this.ramDirectory))
							segmentsToDelete.Add(reader); // queue segment
						// for deletion
					}
				}
				
				SegmentInfos rollback = null;
				bool success = false;
				
				// This is try/finally to rollback our internal state
				// if we hit exception when doing the merge:
				try
				{
					
					if (doMerge)
					{
						mergedDocCount = merger.Merge();
						
						if (infoStream != null)
						{
							infoStream.WriteLine(" into " + mergedName + " (" + mergedDocCount + " docs)");
						}
						
						newSegment = new SegmentInfo(mergedName, mergedDocCount, directory, false, true);
					}
					
					if (!inTransaction && (sourceSegments != ramSegmentInfos || bufferedDeleteTerms.Count > 0))
					{
						// Now save the SegmentInfo instances that
						// we are replacing:
						rollback = (SegmentInfos) segmentInfos.Clone();
					}
					
					if (doMerge)
					{
						if (sourceSegments == ramSegmentInfos)
						{
							segmentInfos.Add(newSegment);
						}
						else
						{
							for (int i = end - 1; i > minSegment; i--)
							// remove old infos & add new
								sourceSegments.RemoveAt(i);
							
							segmentInfos[minSegment] = newSegment;
						}
					}
					
					if (sourceSegments == ramSegmentInfos)
					{
						// Should not be necessary: no prior commit should
						// have left pending files, so just defensive:
						deleter.ClearPendingFiles();
						MaybeApplyDeletes(doMerge);
						DoAfterFlush();
					}
					
					if (!inTransaction)
					{
//.........这里部分代码省略.........