Method GetMetaData

Common/DataModel/vtkDataObjectTree.cxx:373–410

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

//------------------------------------------------------------------------------
vtkInformation* vtkDataObjectTree::GetMetaData(vtkCompositeDataIterator* compositeIter)
{
  auto dObjTreeIter = vtkDataObjectTreeIterator::SafeDownCast(compositeIter);
  if (!dObjTreeIter || dObjTreeIter->IsDoneWithTraversal())
  {
    vtkErrorMacro("Invalid iterator location.");
    return nullptr;
  }

  vtkDataObjectTreeIndex index = dObjTreeIter->GetCurrentIndex();

  if (index.empty())
  {
    // Sanity check.
    vtkErrorMacro("Invalid index returned by iterator.");
    return nullptr;
  }

  vtkDataObjectTree* parent = this;
  int numIndices = static_cast<int>(index.size());
  for (int cc = 0; cc < numIndices - 1; cc++)
  {
    if (!parent || parent->GetNumberOfChildren() <= index[cc])
    {
      vtkErrorMacro("Structure is not expected. Did you forget to use copy structure?");
      return nullptr;
    }
    parent = vtkDataObjectTree::SafeDownCast(parent->GetChild(index[cc]));
  }

  if (!parent || parent->GetNumberOfChildren() <= index.back())
  {
    vtkErrorMacro("Structure is not expected. Did you forget to use copy structure?");
    return nullptr;
  }

  return parent->GetChildMetaData(index.back());
}

//------------------------------------------------------------------------------
vtkTypeBool vtkDataObjectTree::HasMetaData(vtkCompositeDataIterator* compositeIter)