Method ReadXMLData

IO/XML/vtkXMLPTableReader.cxx:358–420

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkXMLPTableReader::ReadXMLData()
{
  // Get the update request.
  vtkInformation* outInfo = this->GetCurrentOutputInformation();
  int piece = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
  int numberOfPieces = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES());

  vtkDebugMacro("Updating piece " << piece << " of " << numberOfPieces);

  // Setup the range of pieces that will be read.
  this->SetupUpdateExtent(piece, numberOfPieces);

  // If there are no data to read, stop now.
  if (this->StartPiece == this->EndPiece)
  {
    return;
  }

  vtkDebugMacro(
    "Reading piece range [" << this->StartPiece << ", " << this->EndPiece << ") from file.");

  // Let superclasses read data.  This also allocates output data.
  this->Superclass::ReadXMLData();

  // Split current progress range based on fraction contributed by
  // each piece.
  float progressRange[2] = { 0.f, 0.f };
  this->GetProgressRange(progressRange);

  // Calculate the cumulative fraction of data contributed by each
  // piece (for progress).
  std::vector<float> fractions(this->EndPiece - this->StartPiece + 1);
  fractions[0] = 0;
  for (int i = this->StartPiece; i < this->EndPiece; ++i)
  {
    int index = i - this->StartPiece;
    fractions[index + 1] = (fractions[index] + this->GetNumberOfRowsInPiece(i));
  }
  if (fractions[this->EndPiece - this->StartPiece] == 0)
  {
    fractions[this->EndPiece - this->StartPiece] = 1;
  }
  for (int i = this->StartPiece; i < this->EndPiece; ++i)
  {
    int index = i - this->StartPiece;
    fractions[index + 1] = fractions[index + 1] / fractions[this->EndPiece - this->StartPiece];
  }

  // Read the data needed from each piece.
  for (int i = this->StartPiece; (i < this->EndPiece && !this->AbortExecute && !this->DataError);
       ++i)
  {
    // Set the range of progress for this piece.
    this->SetProgressRange(progressRange, i - this->StartPiece, fractions.data());

    if (!this->ReadPieceData(i))
    {
      // An error occurred while reading the piece.