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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkHierarchicalDataSetInternal.h,v $

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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.

=========================================================================*/
// .NAME vtkHierarchicalDataSetInternal - internal structure for vtkHierarchicalDataSet
// .SECTION Description
// vtkHierarchicalDataSetInternal is

#ifndef __vtkHierarchicalDataSetInternal_h
#define __vtkHierarchicalDataSetInternal_h

#include <vtkstd/vector>
#include <vtkstd/algorithm>

#include "vtkDataObject.h"
#include "vtkSmartPointer.h"

class vtkHDSNode;

struct vtkHierarchicalDataSetInternal
{
  typedef vtkstd::vector<vtkSmartPointer<vtkDataObject> > LevelDataSetsType;
  typedef LevelDataSetsType::iterator LevelDataSetsIterator;
  typedef vtkstd::vector<LevelDataSetsType> DataSetsType;
  typedef DataSetsType::iterator DataSetsIterator;

  DataSetsType DataSets;
};

struct vtkHDSNodeRef
{
  vtkHDSNodeRef(int level, int index) : Level(level), Index(index) {}

  vtkstd_bool operator==(const vtkHDSNodeRef& rhs)
    {
      return (this->Level == rhs.Level) && (this->Index == rhs.Index);
    }
  vtkstd_bool operator!=(const vtkHDSNodeRef& rhs)
    {
      return (this->Level != rhs.Level) || (this->Index != rhs.Index);
    }
  
  int Level;
  int Index;
};

class vtkHDSNode
{
public:

//   void AddParent(const vtkHDSNodeRef& parent);
//   void AddChild (const vtkHDSNodeRef& child );

//   void RemoveParent(const vtkHDSNodeRef& parent);
//   void RemoveChild (const vtkHDSNodeRef& child );

//   void DisconnectFromParent(const vtkHDSNodeRef& self,
//                             const vtkHDSNodeRef& parent,
//                             vtkHierarchicalDataSetInternal::DataSetsType& ds);
//   void DisconnectFromChild (const vtkHDSNodeRef& self,
//                             const vtkHDSNodeRef& child,
//                             vtkHierarchicalDataSetInternal::DataSetsType& ds);
//   void ConnectToParent(const vtkHDSNodeRef& self,
//                        const vtkHDSNodeRef& parent,
//                        vtkHierarchicalDataSetInternal::DataSetsType& ds);
//   void ConnectToChild (const vtkHDSNodeRef& self,
//                        const vtkHDSNodeRef& child,
//                        vtkHierarchicalDataSetInternal::DataSetsType& ds);

//   void DisconnectAll(const vtkHDSNodeRef& self,
//                      vtkHierarchicalDataSetInternal::DataSetsType& ds);

protected:
  vtkstd::vector<vtkHDSNodeRef> Parents;
  vtkstd::vector<vtkHDSNodeRef> Children;
};

// inline void vtkHDSNode::AddParent(const vtkHDSNodeRef& parent)
// {
//   this->Parents.push_back(parent);
// }

// inline void vtkHDSNode::AddChild(const vtkHDSNodeRef& child)
// {
//   this->Children.push_back(child);
// }

// inline void vtkHDSNode::RemoveParent(const vtkHDSNodeRef& parent)
// {
//   vtkstd::vector<vtkHDSNodeRef>::iterator it = 
//     vtkstd::find(this->Parents.begin(), this->Parents.end(), parent);
//   if (it != this->Parents.end())
//     {
//     this->Parents.erase(it);
//     }
// }

// inline void vtkHDSNode::RemoveChild (const vtkHDSNodeRef& child)
// {
//   vtkstd::vector<vtkHDSNodeRef>::iterator it = 
//     vtkstd::find(this->Children.begin(), this->Children.end(), child);
//   if (it != this->Children.end())
//     {
//     this->Children.erase(it);
//     }
// }

// inline void vtkHDSNode::ConnectToParent(
//   const vtkHDSNodeRef& self,
//   const vtkHDSNodeRef& parent,
//   vtkHierarchicalDataSetInternal::DataSetsType& ds)
// {
//   this->AddParent(parent);
//   ds[parent.Level][parent.Index]->AddChild(self);
// }

// inline void vtkHDSNode::ConnectToChild(
//   const vtkHDSNodeRef& self,
//   const vtkHDSNodeRef& child,
//   vtkHierarchicalDataSetInternal::DataSetsType& ds)
// {
//   this->AddChild(child);
//   ds[child.Level][child.Index]->AddParent(self);
// }

// inline void vtkHDSNode::DisconnectFromParent(
//   const vtkHDSNodeRef& self,
//   const vtkHDSNodeRef& parent, 
//   vtkHierarchicalDataSetInternal::DataSetsType& ds)
// {
//   this->RemoveParent(parent);
//   ds[parent.Level][parent.Index]->RemoveChild(self);
// }

// inline void vtkHDSNode::DisconnectFromChild(
//   const vtkHDSNodeRef& self,
//   const vtkHDSNodeRef& child, 
//   vtkHierarchicalDataSetInternal::DataSetsType& ds)
// {
//   this->RemoveChild(child);
//   ds[child.Level][child.Index]->RemoveParent(self);
// }

// inline void vtkHDSNode::DisconnectAll(
//   const vtkHDSNodeRef& self, vtkHierarchicalDataSetInternal::DataSetsType& ds)
// {
//   vtkstd::vector<vtkHDSNodeRef>::iterator it;

//   for(it=this->Parents.begin(); it!=this->Parents.end(); ++it)
//     {
//     this->DisconnectFromParent(self, *it, ds);
//     }

//   for(it=this->Children.begin(); it!=this->Children.end(); ++it)
//     {
//     this->DisconnectFromChild(self, *it, ds);
//     }

// }

#endif