Method ReadMetaData

IO/IOSS/vtkIOSSReader.cxx:285–342

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

//----------------------------------------------------------------------------
int vtkIOSSReader::ReadMetaData(vtkInformation* metadata)
{
  vtkLogScopeF(TRACE, "ReadMetaData");
  vtkIOSSUtilities::CaptureNonErrorMessages captureMessagesRAII;

  auto& internals = (*this->Internals);
  if (!internals.UpdateDatabaseNames(this))
  {
    return 0;
  }

  // read time information and generate that.
  if (!internals.UpdateTimeInformation(this))
  {
    return 0;
  }
  else
  {
    // add timesteps to metadata
    const auto& timesteps = internals.GetTimeSteps();
    if (!timesteps.empty())
    {
      metadata->Set(vtkStreamingDemandDrivenPipeline::TIME_STEPS(), timesteps.data(),
        static_cast<int>(timesteps.size()));
      double time_range[2] = { timesteps.front(), timesteps.back() };
      metadata->Set(vtkStreamingDemandDrivenPipeline::TIME_RANGE(), time_range, 2);
    }
    else
    {
      metadata->Remove(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
      metadata->Remove(vtkStreamingDemandDrivenPipeline::TIME_RANGE());
    }
  }

  // read field/entity selection meta-data. i.e. update vtkDataArraySelection
  // instances for all available entity-blocks, entity-sets, and their
  // corresponding data arrays.
  if (!internals.UpdateEntityAndFieldSelections(this))
  {
    return 0;
  }

  // read assembly information.
  if (!internals.UpdateAssembly(this, &this->AssemblyTag))
  {
    return 0;
  }

  metadata->Set(vtkAlgorithm::CAN_HANDLE_PIECE_REQUEST(), 1);
  if (internals.HaveRestartFiles())
  {
    // All meta-data have been read successfully, so we can release all the regions.
    // Subsequent ReadMesh calls create only the requested regions (if needed) and release previous
    // regions (if no longer needed).
    internals.ReleaseRegions();
  }
  return 1;
}