public FetchData(long steps, long endTime, FetchRequest request)
{
this.arcStep = matchingArchive.getArcStep();
this.arcEndTime = matchingArchive.getEndTime();
this.dsNames = request.getFilter();
this.request = request;
}
public FetchData(Archive matchingArchive, FetchRequest request) {
this.matchingArchive = matchingArchive;
this.arcStep = matchingArchive.getArcStep();
this.arcEndTime = matchingArchive.getEndTime();
this.dsNames = request.getFilter();
if (this.dsNames == null) {
this.dsNames = matchingArchive.getParentDb().getDsNames();
}
this.request = request;
}
public FetchData fetchData(FetchRequest request)
{
long arcStep = getArcStep();
long fetchStart = Util.normalize(request.FetchStart, arcStep);
long fetchEnd = Util.normalize(request.FetchEnd, arcStep);
if (fetchEnd < request.FetchEnd)
{
fetchEnd += arcStep;
}
long startTime = getStartTime();
long endTime = getEndTime();
String[] dsToFetch = request.getFilter();
if (dsToFetch == null)
{
dsToFetch = parentDb.getDsNames();
}
int dsCount = dsToFetch.Length;
int ptsCount = (int)((fetchEnd - fetchStart) / arcStep + 1);
long[] timestamps = new long[ptsCount];
double[][] values = new double[dsCount][];
for (int i = 0; i < dsCount; i++)
{
values[i] = new double[ptsCount];
}
long matchStartTime = Math.Max(fetchStart, startTime);
long matchEndTime = Math.Min(fetchEnd, endTime);
double[][] robinValues = null;
if (matchStartTime <= matchEndTime)
{
// preload robin values
int matchCount = (int)((matchEndTime - matchStartTime) / arcStep + 1);
int matchStartIndex = (int)((matchStartTime - startTime) / arcStep);
robinValues = new double[dsCount][];
for (int i = 0; i < dsCount; i++)
{
int dsIndex = parentDb.getDsIndex(dsToFetch[i]);
robinValues[i] = robins[dsIndex].getValues(matchStartIndex, matchCount);
}
}
for (int ptIndex = 0; ptIndex < ptsCount; ptIndex++)
{
long time = fetchStart + ptIndex * arcStep;
timestamps[ptIndex] = time;
for (int i = 0; i < dsCount; i++)
{
double value = Double.NaN;
if (time >= matchStartTime && time <= matchEndTime)
{
// inbound time
int robinValueIndex = (int)((time - matchStartTime) / arcStep);
Debug.Assert(robinValues != null);
value = robinValues[i][robinValueIndex];
}
values[i][ptIndex] = value;
}
}
FetchData fetchData = new FetchData(steps.get(), endTime, parentDb.getDsNames());
fetchData.setTimestamps(timestamps);
fetchData.setValues(values);
return(fetchData);
}