Method UpdateDatabaseNames

IO/IOSS/vtkIOSSReaderInternal.cxx:121–261

}

bool vtkIOSSReaderInternal::UpdateDatabaseNames(vtkIOSSReader* self)
{
  if (this->DatabaseNamesMTime > this->FileNamesMTime)
  {
    // we may still need filtering if MTime changed, so check that.
    if (self->GetMTime() > this->DatabaseNamesMTime)
    {
      auto subset = this->GenerateSubset(this->UnfilteredDatabaseNames, self);
      if (this->DatabaseNames != subset)
      {
        this->DatabaseNames = std::move(subset);
        this->DatabaseNamesMTime.Modified();
      }
    }
    return (!this->DatabaseNames.empty());
  }

  // Clear cache since we're updating the databases, old caches no longer makes
  // sense.
  this->Cache.Clear();

  // Clear old Ioss::Region's since they may not be correct anymore.
  this->ReleaseRegions();

  auto filenames = this->FileNames;
  auto controller = self->GetController();
  const int myrank = controller ? controller->GetLocalProcessId() : 0;
  const int ranks = controller ? controller->GetNumberOfProcesses() : 1;

  if (myrank == 0)
  {
    if (filenames.size() == 1 && vtkIOSSFilesScanner::IsMetaFile(*filenames.begin()))
    {
      filenames = vtkIOSSFilesScanner::GetFilesFromMetaFile(*filenames.begin());
      // To address issue paraview/paraview/-/issues/22124 we need to scan for related files
      // when reading an ex-timeseries file.
      if (self->GetScanForRelatedFiles())
      {
        filenames = vtkIOSSFilesScanner::GetRelatedFiles(filenames);
      }
    }
    else if (filenames.size() == 1 && *filenames.begin() == "catalyst.bin" && ranks > 1)
    {
      // "catalyst.bin" is a special filename to indicate that we should read from catalyst.
      // To make sure that each node creates a database handle to try to read something
      // from catalyst, we need to create a "filename" for each rank.
      filenames.clear();
      for (int i = 0; i < ranks; ++i)
      {
        filenames.insert("catalyst.bin." + vtk::to_string(ranks) + "." + vtk::to_string(i));
      }
    }
    else if (self->GetScanForRelatedFiles())
    {
      filenames = vtkIOSSFilesScanner::GetRelatedFiles(filenames);
    }
  }