/// <summary>
/// Gets concentrated frames from the provided stream
/// </summary>
/// <param name="stream">the database to use</param>
/// <returns></returns>
public static SortedList <DateTime, FrameData> GetFrames(this TreeStream <HistorianKey, HistorianValue> stream)
{
SortedList <DateTime, FrameDataConstructor> results = new SortedList <DateTime, FrameDataConstructor>();
ulong lastTime = ulong.MinValue;
FrameDataConstructor lastFrame = null;
HistorianKey key = new HistorianKey();
HistorianValue value = new HistorianValue();
while (stream.Read(key, value))
{
if (lastFrame == null || key.Timestamp != lastTime)
{
lastTime = key.Timestamp;
DateTime timestamp = new DateTime((long)lastTime);
if (!results.TryGetValue(timestamp, out lastFrame))
{
lastFrame = new FrameDataConstructor();
results.Add(timestamp, lastFrame);
}
}
lastFrame.PointId.Add(key.PointID);
lastFrame.Values.Add(value.ToStruct());
}
List <FrameData> data = new List <FrameData>(results.Count);
data.AddRange(results.Values.Select(x => x.ToFrameData()));
return(SortedListConstructor.Create(results.Keys, data));
}
/// <summary>
/// Gets concentrated frames from the provided stream
/// </summary>
/// <param name="stream">the database to use</param>
/// <returns></returns>
public static SortedList<DateTime, FrameData> GetFrames(this TreeStream<HistorianKey, HistorianValue> stream)
{
SortedList<DateTime, FrameDataConstructor> results = new SortedList<DateTime, FrameDataConstructor>();
ulong lastTime = ulong.MinValue;
FrameDataConstructor lastFrame = null;
HistorianKey key = new HistorianKey();
HistorianValue value = new HistorianValue();
while (stream.Read(key, value))
{
if (lastFrame == null || key.Timestamp != lastTime)
{
lastTime = key.Timestamp;
DateTime timestamp = new DateTime((long)lastTime);
if (!results.TryGetValue(timestamp, out lastFrame))
{
lastFrame = new FrameDataConstructor();
results.Add(timestamp, lastFrame);
}
}
lastFrame.PointId.Add(key.PointID);
lastFrame.Values.Add(value.ToStruct());
}
List<FrameData> data = new List<FrameData>(results.Count);
data.AddRange(results.Values.Select(x => x.ToFrameData()));
return SortedListConstructor.Create(results.Keys, data);
}
