Lucene.Net.Index.IndexWriter.EnsureContiguousMerge C# (CSharp) Method

		private int EnsureContiguousMerge(MergePolicy.OneMerge merge)
		{
			
			int first = segmentInfos.IndexOf(merge.segments.Info(0));
			if (first == - 1)
				throw new MergePolicy.MergeException("could not find segment " + merge.segments.Info(0).name + " in current index " + SegString(), directory);
			
			int numSegments = segmentInfos.Count;
			
			int numSegmentsToMerge = merge.segments.Count;
			for (int i = 0; i < numSegmentsToMerge; i++)
			{
				SegmentInfo info = merge.segments.Info(i);
				
				if (first + i >= numSegments || !segmentInfos.Info(first + i).Equals(info))
				{
					if (segmentInfos.IndexOf(info) == - 1)
						throw new MergePolicy.MergeException("MergePolicy selected a segment (" + info.name + ") that is not in the current index " + SegString(), directory);
					else
						throw new MergePolicy.MergeException("MergePolicy selected non-contiguous segments to merge (" + merge.SegString(directory) + " vs " + SegString() + "), which IndexWriter (currently) cannot handle", directory);
				}
			}
			
			return first;
		}