Method CopyDefaultInformation

Common/ExecutionModel/vtkExecutive.cxx:617–712

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//------------------------------------------------------------------------------
void vtkExecutive::CopyDefaultInformation(vtkInformation* request, int direction,
  vtkInformationVector** inInfoVec, vtkInformationVector* outInfoVec)
{
  if (direction == vtkExecutive::RequestDownstream)
  {
    // Copy information from the first input to all outputs.
    if (this->GetNumberOfInputPorts() > 0 && inInfoVec[0]->GetNumberOfInformationObjects() > 0)
    {
      vtkInformationKey** keys = request->Get(KEYS_TO_COPY());
      int length = request->Length(KEYS_TO_COPY());
      vtkInformation* inInfo = inInfoVec[0]->GetInformationObject(0);

      vtkSmartPointer<vtkInformationIterator> infoIter =
        vtkSmartPointer<vtkInformationIterator>::New();
      infoIter->SetInformationWeak(inInfo);

      int oiobj = outInfoVec->GetNumberOfInformationObjects();
      for (int i = 0; i < oiobj; ++i)
      {
        vtkInformation* outInfo = outInfoVec->GetInformationObject(i);
        for (int j = 0; j < length; ++j)
        {
          // Copy the entry.
          outInfo->CopyEntry(inInfo, keys[j]);

          // If the entry is a key vector, copy all the keys listed.
          if (vtkInformationKeyVectorKey* vkey = vtkInformationKeyVectorKey::SafeDownCast(keys[j]))
          {
            outInfo->CopyEntries(inInfo, vkey);
          }
        }

        // Give the keys an opportunity to copy themselves.
        infoIter->InitTraversal();
        while (!infoIter->IsDoneWithTraversal())
        {
          vtkInformationKey* key = infoIter->GetCurrentKey();
          key->CopyDefaultInformation(request, inInfo, outInfo);
          infoIter->GoToNextItem();
        }
      }
    }
  }
  else
  {
    // Get the output port from which the request was made.  Use zero
    // if output port was not specified.
    int outputPort = 0;
    if (request->Has(FROM_OUTPUT_PORT()))
    {
      outputPort = request->Get(FROM_OUTPUT_PORT());
      outputPort = outputPort == -1 ? 0 : outputPort;
    }

    // Copy information from the requesting output to all inputs.
    if (outputPort >= 0 && outputPort < outInfoVec->GetNumberOfInformationObjects())
    {
      vtkInformationKey** keys = request->Get(KEYS_TO_COPY());