Lucene.Net.Search.ShardSearchingTestBase.NodeState.ShardIndexSearcher.CollectionStatistics C# (CSharp) Method

                public override CollectionStatistics CollectionStatistics(string field)
                {
                    // TODO: we could compute this on init and cache,
                    // since we are re-inited whenever any nodes have a
                    // new reader
                    long docCount = 0;
                    long sumTotalTermFreq = 0;
                    long sumDocFreq = 0;
                    long maxDoc = 0;

                    for (int nodeID = 0; nodeID < NodeVersions.Length; nodeID++)
                    {
                        FieldAndShardVersion key = new FieldAndShardVersion(nodeID, NodeVersions[nodeID], field);
                        CollectionStatistics nodeStats;
                        if (nodeID == MyNodeID)
                        {
                            nodeStats = base.CollectionStatistics(field);
                        }
                        else
                        {
                            nodeStats = OuterInstance.CollectionStatsCache[key];
                        }
                        if (nodeStats == null)
                        {
                            Console.WriteLine("coll stats myNodeID=" + MyNodeID + ": " + OuterInstance.CollectionStatsCache.Keys);
                        }
                        // Collection stats are pre-shared on reopen, so,
                        // we better not have a cache miss:
                        Debug.Assert(nodeStats != null, "myNodeID=" + MyNodeID + " nodeID=" + nodeID + " version=" + NodeVersions[nodeID] + " field=" + field);

                        long nodeDocCount = nodeStats.DocCount();
                        if (docCount >= 0 && nodeDocCount >= 0)
                        {
                            docCount += nodeDocCount;
                        }
                        else
                        {
                            docCount = -1;
                        }

                        long nodeSumTotalTermFreq = nodeStats.SumTotalTermFreq();
                        if (sumTotalTermFreq >= 0 && nodeSumTotalTermFreq >= 0)
                        {
                            sumTotalTermFreq += nodeSumTotalTermFreq;
                        }
                        else
                        {
                            sumTotalTermFreq = -1;
                        }

                        long nodeSumDocFreq = nodeStats.SumDocFreq();
                        if (sumDocFreq >= 0 && nodeSumDocFreq >= 0)
                        {
                            sumDocFreq += nodeSumDocFreq;
                        }
                        else
                        {
                            sumDocFreq = -1;
                        }

                        Debug.Assert(nodeStats.MaxDoc >= 0);
                        maxDoc += nodeStats.MaxDoc;
                    }

                    return new CollectionStatistics(field, maxDoc, docCount, sumTotalTermFreq, sumDocFreq);
                }