Method ReadMetaData

IO/NetCDF/vtkNetCDFReader.cxx:655–705

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

//------------------------------------------------------------------------------
int vtkNetCDFReader::ReadMetaData(int ncFD)
{
  // Look at all variables and record them so that the user can select which
  // ones he wants.  This oddness of adding and removing from
  // VariableArraySelection is to preserve any current settings for variables.
  typedef std::set<std::string> stringSet;
  stringSet variablesToAdd;
  stringSet variablesToRemove;

  // Initialize variablesToRemove with all the variables.  Then remove them from
  // the list as we find them.
  for (int i = 0; i < this->VariableArraySelection->GetNumberOfArrays(); i++)
  {
    variablesToRemove.insert(this->VariableArraySelection->GetArrayName(i));
  }

  int numVariables;
  CALL_NETCDF_INT(this->Accessor->inq_nvars(ncFD, &numVariables));

  for (int i = 0; i < numVariables; i++)
  {
    char name[NC_MAX_NAME + 1];
    CALL_NETCDF_INT(this->Accessor->inq_varname(ncFD, i, name));
    if (variablesToRemove.find(name) == variablesToRemove.end())
    {
      // Variable not already here.  Insert it in the variables to add.
      variablesToAdd.insert(name);
    }
    else
    {
      // Variable already exists.  Leave it be.  Remove it from the
      // variablesToRemove list.
      variablesToRemove.erase(name);
    }
  }

  // Add and remove variables.  This will be a no-op if the variables have not
  // changed.
  for (stringSet::iterator removeItr = variablesToRemove.begin();
       removeItr != variablesToRemove.end(); ++removeItr)
  {
    this->VariableArraySelection->RemoveArrayByName(removeItr->c_str());
  }
  for (stringSet::iterator addItr = variablesToAdd.begin(); addItr != variablesToAdd.end();
       ++addItr)
  {
    this->VariableArraySelection->AddArray(addItr->c_str());
  }

  return 1;
}

//------------------------------------------------------------------------------
int vtkNetCDFReader::FillVariableDimensions(int ncFD)