public TQueryResult MergeResults(IList <TQueryResult> PartialResults)
{
TQueryResult finalResult = default(TQueryResult);
if (PartialResults != null && PartialResults.Count > 0)
{
if (PartialResults.Count == 1)
{
// no need to merge anything
finalResult = PartialResults[0];
}
else
{
#region Need to merge
#region Iterate over PartialResults and create CompleteResults
List <CacheData> CompleteResults = new List <CacheData>();
int totalCount = 0;
foreach (TQueryResult partialResult in PartialResults)
{
if (partialResult != null)
{
totalCount += partialResult.TotalCount;
CompleteResults.AddRange(partialResult.CacheDataList);
}
}
#endregion
#region sort CompleteResults
CompleteResults.Sort(CacheDataComparison);
#endregion
#region apply cap restriction and get FilteredResults
List <CacheData> FilteredResults = new List <CacheData>();
if (Caps.Count > 0)
{
if (CompleteResults.Count > PageSize)
{
#region apply cap restrictions
Dictionary <int /*activity type*/, int /*count*/> Occurance = new Dictionary <int, int>();
List <Pair <int /*insert position*/, CacheData /*item*/> > SkippedItems = new List <Pair <int, CacheData> >();
int OccuranceCount;
int Cap;
for (int i = 0; i < CompleteResults.Count && FilteredResults.Count < PageSize; i++)
{
if (Caps.TryGetValue(CompleteResults[i].CacheTypeId, out Cap))
{
#region Cap exists
if (!Occurance.TryGetValue(CompleteResults[i].CacheTypeId, out OccuranceCount))
{
// first occurance, add it
Occurance.Add(CompleteResults[i].CacheTypeId, 1);
FilteredResults.Add(CompleteResults[i]);
}
else if (OccuranceCount < Cap)
{
// max not reached, add it
Occurance[CompleteResults[i].CacheTypeId]++;
FilteredResults.Add(CompleteResults[i]);
}
else
{
// skip it
SkippedItems.Add(new Pair <int, CacheData>(FilteredResults.Count, CompleteResults[i]));
}
#endregion
}
else
{
// No Cap - Just Add it
FilteredResults.Add(CompleteResults[i]);
}
}
#region Expand FilteredCacheDataRefList to include SkippedItems if necessary
int pos = 0;
int skippedItemIndex = 0;
while (FilteredResults.Count < PageSize && skippedItemIndex < SkippedItems.Count)
{
FilteredResults.Insert(SkippedItems[skippedItemIndex].First + (pos++), SkippedItems[skippedItemIndex++].Second);
}
#endregion
#endregion
}
else
{
//else no need to cap
FilteredResults = CompleteResults;
}
}
else
{
#region use page logic
int pageSize = (CompleteResults.Count < PageSize ? CompleteResults.Count : PageSize);
FilteredResults = CompleteResults.GetRange(0, pageSize);
#endregion
}
#endregion
#region create finalResult
finalResult = new TQueryResult();
finalResult.CacheDataList = FilteredResults;
finalResult.TotalCount = totalCount;
#endregion
#endregion
}
}
return(finalResult);
}