/*=========================================================================

  Program:   ParaView
  Module:    vtkAddCellDataFilter.cxx

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkAddCellDataFilter.h"

#include "vtkObjectFactory.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMultiBlockWrapper.h"

#include "vtkCellData.h"
#include "vtkIntArray.h"
#include "vtkDataSet.h"

vtkStandardNewMacro(vtkAddCellDataFilter);

//----------------------------------------------------------------------------
vtkAddCellDataFilter::vtkAddCellDataFilter()
{
}

//----------------------------------------------------------------------------
vtkAddCellDataFilter::~vtkAddCellDataFilter()
{
}

//----------------------------------------------------------------------------
int vtkAddCellDataFilter::RequestData(
  vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector,
  vtkInformationVector* outputVector)
{
  // get the info objects
  vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation *outInfo = outputVector->GetInformationObject(0);

  // get the input and ouptut
  vtkDataSet *input = vtkDataSet::SafeDownCast(
    inInfo->Get(vtkDataObject::DATA_OBJECT()));
  vtkDataSet *output = vtkDataSet::SafeDownCast(
    outInfo->Get(vtkDataObject::DATA_OBJECT()));

  output->ShallowCopy(input);

  vtkCellData *cellData = output->GetCellData();
  vtkIntArray *regionIDs =
    vtkIntArray::SafeDownCast( cellData->GetArray(
       vtkMultiBlockWrapper::GetShellTagName()) );
  if (!regionIDs) // intialize to be a single region
    {
    regionIDs = vtkIntArray::New();
    regionIDs->SetNumberOfTuples( output->GetNumberOfCells() );
    regionIDs->SetName( vtkMultiBlockWrapper::GetShellTagName() );
    for (int i = 0; i < regionIDs->GetNumberOfTuples(); i++)
      {
      regionIDs->SetValue(i, 0);
      }
    cellData->AddArray( regionIDs );
    regionIDs->Delete();
    }

  // if "Material" not present, copy Region
  vtkIntArray *materialIDs =
    vtkIntArray::SafeDownCast( cellData->GetArray(
       vtkMultiBlockWrapper::GetMaterialTagName()) );
  if (!materialIDs)
    {
    materialIDs = vtkIntArray::New();
    materialIDs->DeepCopy( regionIDs );
    materialIDs->SetName( vtkMultiBlockWrapper::GetMaterialTagName() );
    cellData->AddArray( materialIDs );
    materialIDs->Delete();
    }

  // if "Model Face" not present, copy Region
  vtkIntArray *modelFaceIDs =
    vtkIntArray::SafeDownCast( cellData->GetArray(
    vtkMultiBlockWrapper::GetModelFaceTagName()) );
  if (!modelFaceIDs)
    {
    modelFaceIDs = vtkIntArray::New();
    modelFaceIDs->DeepCopy( regionIDs );
    modelFaceIDs->SetName( vtkMultiBlockWrapper::GetModelFaceTagName() );
    cellData->AddArray( modelFaceIDs );
    modelFaceIDs->Delete();
    }

  return 1;
}

//----------------------------------------------------------------------------
void vtkAddCellDataFilter::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}


