Method GetInputExecutive

Common/ExecutionModel/vtkAlgorithm.cxx:1600–1619

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

//------------------------------------------------------------------------------
vtkExecutive* vtkAlgorithm::GetInputExecutive(int port, int index)
{
  if (index < 0 || index >= this->GetNumberOfInputConnections(port))
  {
    vtkErrorMacro("Attempt to get connection index "
      << index << " for input port " << port << ", which has "
      << this->GetNumberOfInputConnections(port) << " connections.");
    return nullptr;
  }
  if (vtkInformation* info = this->GetExecutive()->GetInputInformation(port, index))
  {
    // Get the executive producing this input.  If there is none, then
    // it is a nullptr input.
    vtkExecutive* producer;
    int producerPort;
    vtkExecutive::PRODUCER()->Get(info, producer, producerPort);
    return producer;
  }
  return nullptr;
}

//------------------------------------------------------------------------------
vtkAlgorithmOutput* vtkAlgorithm::GetInputConnection(int port, int index)