/// <summary>
/// Determines of the system performance points are all the same
/// </summary>
/// <param name="prevDataPoint">The previous data point to compare to.</param>
/// <param name="nextDataPoint">The next data point to compare to.</param>
/// <returns></returns>
public bool IsTheSameAs(SystemPerformance prevDataPoint, SystemPerformance nextDataPoint)
{
bool areAllTheSame = prevDataPoint != null &&
nextDataPoint != null &&
prevDataPoint.Value == this.Value &&
this.Value == nextDataPoint.Value;
return(areAllTheSame);
}
/// <summary>
/// Compacts the data, to make it easier to render out
/// </summary>
/// <param name="data">The data.</param>
/// <param name="secondsInterval">The seconds interval.</param>
public static void CompactData(IList <SystemPerformance> data, int secondsInterval)
{
Debug.Assert(secondsInterval >= 0, "secondsInterval cannot be less than zero");
bool keepSameValue = false;
for (var i = 0; i < data.Count; i++)
{
SystemPerformance prevDataPoint = i > 0 ? data[i - 1] : null;
SystemPerformance dataPoint = data[i];
SystemPerformance nextDataPoint = i < data.Count - 1 ? data[i + 1] : null;
bool areAllTheSame = dataPoint.IsTheSameAs(prevDataPoint, nextDataPoint);
if (prevDataPoint != null &&
(dataPoint.AuditTime - prevDataPoint.AuditTime).TotalSeconds > secondsInterval &&
dataPoint.Value != 0 &&
(!keepSameValue || prevDataPoint.Value != dataPoint.Value))
{
// if there is a greater-than-interval time difference between the previous and
// current data points, insert zero record at current position (to push the rest out by one)
data.Insert(i, new SystemPerformance {
AuditTime = dataPoint.AuditTime.AddSeconds(-1), Value = 0
});
keepSameValue = false;
}
else if (nextDataPoint != null &&
(nextDataPoint.AuditTime - dataPoint.AuditTime).TotalSeconds > secondsInterval &&
dataPoint.Value != 0 &&
(!keepSameValue || dataPoint.Value != nextDataPoint.Value))
{
// if there is a greater-than-interval time difference between the current and
// next data points, insert zero record at current position + 1 (to be processed next pass)
data.Insert(i + 1, new SystemPerformance {
AuditTime = dataPoint.AuditTime.AddSeconds(1), Value = 0
});
keepSameValue = false;
}
else if (areAllTheSame)
{
// if the data is the same in all instances, remove it
data.RemoveAt(i);
keepSameValue = true;
i--; // adjust i
}
}
}
