public void AddGetTrendPoint(int l_iAutomationFunctionId, int l_iPortId)
{
lock (m_TrendPointsData)
{
long l_iUniqueKey = CreateUniqueKey(l_iAutomationFunctionId, l_iPortId);
if (m_TrendPointsData.ContainsKey(l_iUniqueKey) == false)
{
TrendPoint l_TrendPoint = new TrendPoint();
l_TrendPoint.ID = l_iUniqueKey;
l_TrendPoint.LastestTime = 0;
l_TrendPoint.SessionID = -1;
l_TrendPoint.Data.Clear();
m_TrendPointsData.Add(l_iUniqueKey, l_TrendPoint);
}
}
}
/// <summary>
/// Merges the trends providing a single timeline.
/// </summary>
public static TrendBundle MergeTrends(IList <Trend> trends)
{
if (trends == null)
{
throw new ArgumentNullException(nameof(trends));
}
// simple cases first
int cnlCnt = trends.Count;
if (cnlCnt == 0)
{
return(new TrendBundle(0, 0));
}
if (cnlCnt == 1)
{
return(CreateTrendBundle(trends[0]));
}
// full case
int maxTrendCapacity = 0;
int[] cnlNums = new int[cnlCnt];
int[] trendPositions = new int[cnlCnt]; // trend reading positions
for (int i = 0; i < cnlCnt; i++)
{
Trend trend = trends[i];
cnlNums[i] = trend.CnlNum;
trendPositions[i] = 0;
if (maxTrendCapacity < trend.Points.Count)
{
maxTrendCapacity = trend.Points.Count;
}
}
const double CapacityRatio = 1.1;
TrendBundle trendBundle = new TrendBundle(cnlNums, (int)(maxTrendCapacity * CapacityRatio));
while (true)
{
// determine the minimum timestamp at trend reading positions
DateTime minTimestamp = DateTime.MaxValue;
bool endReached = true;
for (int i = 0; i < cnlCnt; i++)
{
List <TrendPoint> trendPoints = trends[i].Points;
int trendPos = trendPositions[i];
if (trendPos < trendPoints.Count)
{
endReached = false;
DateTime pointTimestamp = trendPoints[trendPos].Timestamp;
if (minTimestamp > pointTimestamp)
{
minTimestamp = pointTimestamp;
}
}
}
if (endReached)
{
break;
}
// copy data with found timestamp
trendBundle.Timestamps.Add(minTimestamp);
for (int i = 0; i < cnlCnt; i++)
{
Trend trend = trends[i];
int trendPos = trendPositions[i];
CnlData cnlData = CnlData.Empty;
if (trendPos < trend.Points.Count)
{
TrendPoint trendPoint = trend.Points[trendPos];
if ((trendPoint.Timestamp - minTimestamp).TotalMilliseconds < TimeDiscreteness)
{
cnlData = new CnlData(trendPoint.Val, trendPoint.Stat);
trendPositions[i]++;
}
}
trendBundle.Trends[i].Add(cnlData);
}
}
return(trendBundle);
}