public static void ExecuteThread(Query q, DataItemPool dip)
{
while (true)
{
q.Iterate(dip.GetItem, dip.ReleaseItem);
Thread.Sleep(10);
}
}
/// <summary>
/// Iterate function to work through data items.
/// The Step functions are called with each data item that arrives from one chosen input
/// The Final functions are called when EOF is encountered on each input
/// </summary>
/// <returns>DataItem objects that can be output from this iteration</returns>
/// <seealso cref="QueryEngine.Step"/>
/// <seealso cref="QueryEngine.Final"/>
public override List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
ldiBufferOut.Clear();
//Which input should we read from next?
//int iNext = Next();
for (int iNext = 0; iNext < qopInputs.Count; iNext++)
{
iLastInput = iNext;
if (qopInputs[iNext] != null)
{
SplitPunc(qopInputs[iNext].Iterate(gdi, rdi), ref ldiBuffer, ref lpBuffer);
itemsIn += ldiBuffer.Count + lpBuffer.Count;
if (rgeof[iNext] == false)
rgSteplist[iNext](ldiBuffer, ref ldiBufferOut, out rgeof[iNext]);
foreach (Punctuation p in lpBuffer)
rgPass[iNext](p, ldiBufferOut);
foreach (Punctuation p in lpBuffer)
{
rgKeep[iNext](p);
rgProp[iNext](p, ldiBufferOut);
}
if (rgeof[iNext])
rgFinal[iNext](ldiBufferOut);
bool fEOF = true;
for (int i = 0; i < qopInputs.Count && fEOF == true; i++)
fEOF &= rgeof[i];
if (fEOF)
{
ldiBufferOut.Add(diEOF);
eof = true;
}
}
}
itemsOut += ldiBufferOut.Count;
return ldiBufferOut;
}
/// <summary>
/// Iterate function to work through data items.
/// The Step functions are called with each data item that arrives from each input.
/// The Final functions aer called when EOF is encountered on each input
/// </summary>
/// <returns>DataItem objects that can be output from this iteration</returns>
/// <seealso cref="QueryEngine.Step"/>
/// <seealso cref="QueryEngine.Final"/>
public override List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
bool fLEOF = false, fREOF = false;
ldiBufferOut.Clear();
if (opInLeft != null && opInRight != null)
{
algorithm.GetDataItem = gdi;
algorithm.ReleaseDataItem = rdi;
SplitPunc(opInLeft.Iterate(gdi, rdi), ref ldiBufferLeft, ref lpBufferLeft);
SplitPunc(opInRight.Iterate(gdi, rdi), ref ldiBufferRight, ref lpBufferRight);
itemsIn += (ldiBufferLeft.Count + ldiBufferRight.Count + lpBufferLeft.Count + lpBufferRight.Count);
algorithm.FnStepListLeft(ldiBufferLeft, ref ldiBufferOut, out fLEOF);
algorithm.FnStepListRight(ldiBufferRight, ref ldiBufferOut, out fREOF);
foreach (Punctuation p in lpBufferLeft)
algorithm.FnPassLeft(p, ldiBufferOut);
foreach (Punctuation p in lpBufferRight)
algorithm.FnPassRight(p, ldiBufferOut);
foreach (Punctuation p in lpBufferLeft)
{
algorithm.FnKeepLeft(p);
algorithm.FnPropLeft(p, ldiBufferOut);
}
foreach (Punctuation p in lpBufferRight)
{
algorithm.FnKeepRight(p);
algorithm.FnPropRight(p, ldiBufferOut);
}
if (fLEOF)
{
algorithm.FnFinalLeft(ldiBufferOut);
fLeftEOF = true; //Don't set main EOF flag until after calling final
}
if (fREOF)
{
algorithm.FnFinalRight(ldiBufferOut);
fRightEOF = true; //Don't set main EOF flag until after calling final
}
if (fLeftEOF && fRightEOF)
{
ldiBufferOut.Add(diEOF);
eof = true;
}
algorithm.GetDataItem = null;
algorithm.ReleaseDataItem = null;
}
itemsOut += ldiBufferOut.Count;
return ldiBufferOut;
}
/// <summary>
/// Iterate function to work through data items.
/// The Step function is called with each data item that arrives.
/// The Final function is called when EOF is encountered
/// </summary>
/// <returns>DataItem objects that can be output from this iteration</returns>
/// <seealso cref="QueryEngine.Step"/>
/// <seealso cref="QueryEngine.Final"/>
public override List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
bool eofInput = false;
ldiBufferOut.Clear();
if (opIn != null)
{
algorithm.GetDataItem = gdi;
algorithm.ReleaseDataItem = rdi;
List<DataItem> ldiIn = opIn.Iterate(gdi, rdi);
itemsIn += ldiIn.Count;
Step step = algorithm.FnStep;
foreach (DataItem di in ldiIn)
{
if (!(di is Punctuation))
{
if (!di.EOF)
step(di, ldiBufferOut);
eofInput |= di.EOF;
}
else
{
Punctuation p = di as Punctuation;
algorithm.FnPass(p, ldiBufferOut);
algorithm.FnKeep(p);
algorithm.FnProp(p, ldiBufferOut);
}
}
if (eofInput)
{
algorithm.FnFinal(ldiBufferOut);
ldiBufferOut.Add(diEOF);
eof = true;
}
algorithm.GetDataItem = null;
algorithm.ReleaseDataItem = null;
}
itemsOut += ldiBufferOut.Count;
return ldiBufferOut;
}
/// <summary>
/// Read DataItems iteratively from the source query operator(s)
/// </summary>
/// <returns>Any DataItem objects to be output</returns>
public virtual List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
return null;
}
/// <summary>
/// Output new data items
/// </summary>
/// <returns>The DataItem objects to output</returns>
/// <seealso cref="Data.DataItem"/>
public override List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
ldiBufferOut.Clear();
DataItem[] rgdi = gdi(CITERATE);
for (int i = 0; i < CITERATE && !eof; i++)
{
if (iRow < cRows)
{
rgdi[i].AddValue((int)((int)iRow / 7));
rgdi[i].AddValue((int)iRow);
}
else
{
eof = rgdi[i].EOF = true;
Punctuation p = new Punctuation(2);
p.AddValue(new Punctuation.WildcardPattern());
p.AddValue(new Punctuation.WildcardPattern());
ldiBufferOut.Add(p);
}
ldiBufferOut.Add(rgdi[i]);
if (iPunct == 0 && ((int)iRow / 7) != ((int)(iRow + 1) / 7))
{
//Let's add a punctuation
Punctuation p = new Punctuation(2);
p.AddValue(new Punctuation.LiteralPattern((int)(iRow / 7)));
p.AddValue(new Punctuation.WildcardPattern());
ldiBufferOut.Add(p);
}
if (iPunct == 1)
{
if (iRow >= CPUNCTLISTSIZE && iRow % CPUNCTLISTSIZE == 0)
{
Punctuation p2 = new Punctuation(2);
p2.AddValue(new Punctuation.WildcardPattern());
Punctuation.LiteralPattern[] rglp = new Punctuation.LiteralPattern[CPUNCTLISTSIZE];
for (int iLit = 0; iLit < CPUNCTLISTSIZE; iLit++)
rglp[iLit] = new Punctuation.LiteralPattern((int)iRow - CPUNCTLISTSIZE + iLit);
p2.AddValue(new Punctuation.ListPattern(rglp));
ldiBufferOut.Add(p2);
}
}
if (iPunct == 2)
{
if (iRow >= CPUNCTLISTSIZE && iRow % CPUNCTLISTSIZE == 0)
{
Punctuation p2 = new Punctuation(2);
p2.AddValue(new Punctuation.WildcardPattern());
int iMin = iRow - CPUNCTLISTSIZE + 1, iMax = iRow;
p2.AddValue(new Punctuation.RangePattern(iMin, iMax));
ldiBufferOut.Add(p2);
}
}
iRow++;
}
cRowsOutput += ldiBufferOut.Count;
return ldiBufferOut;
}
/// <summary>
/// Output new data items
/// </summary>
/// <returns>The DataItem objects to output</returns>
/// <seealso cref="Data.DataItem"/>
public override List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
ldiBufferOut.Clear();
lock (queBuffer)
{
if (queBuffer.Count > 0)
{
int cData = (queBuffer.Count > MAXDATA) ? MAXDATA : queBuffer.Count;
DataItem[] rgdi = gdi(cData);
for (int i = 0; i < cData; i++)
rgdi[i] = queBuffer.Dequeue();
ldiBufferOut.AddRange(rgdi);
}
//if (queBuffer.Count > 0)
// Console.WriteLine("queue size: {0}", queBuffer.Count);
}
return ldiBufferOut;
}
/// <summary>
/// Iterate through input data items. For a queue, just
/// output up to maximum data items
/// </summary>
/// <returns></returns>
public override List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
List<DataItem> ldiOut;
bool fEOF = false;
lock (data)
{
int c = (maxData > data.Count) ? data.Count : maxData;
ldiOut = new List<DataItem>(c);
while (c > 0)
{
DataItem di = data.Dequeue();
ldiOut.Add(di);
fEOF |= di.EOF;
c--;
}
if (ldiOut.Count > 0)
eof = fEOF;
}
return ldiOut;
}
/// <summary>
/// Iterate function to work through data items.
/// The Step function is called with each data item that arrives.
/// The Final function is called when EOF is encountered
/// </summary>
/// <returns>DataItem objects that can be output from this iteration</returns>
/// <seealso cref="QueryEngine.Step"/>
/// <seealso cref="QueryEngine.Final"/>
public override List<DataItem> Iterate(DataItemPool.GetDataItem gdi, DataItemPool.ReleaseDataItem rdi)
{
bool eofInput;
ldiBufferOut.Clear();
if (opIn != null)
{
algorithm.GetDataItem = gdi;
algorithm.ReleaseDataItem = rdi;
SplitPunc(opIn.Iterate(gdi, rdi), ref ldiBuffer, ref lpBuffer);
algorithm.FnStepList(ldiBuffer, ref ldiBufferOut, out eofInput);
foreach (Punctuation p in lpBuffer)
{
algorithm.FnPass(p, ldiBufferOut);
algorithm.FnKeep(p);
algorithm.FnProp(p, ldiBufferOut);
}
if (eofInput)
{
algorithm.FnFinal(ldiBufferOut);
ldiBufferOut.Add(diEOF);
eof = true;
}
algorithm.GetDataItem = null;
algorithm.ReleaseDataItem = null;
}
return ldiBufferOut;
}