vtkDistributedGraphHelper.h

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

  Program:   Visualization Toolkit
  Module:    vtkDistributedGraphHelper.h

  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.

=========================================================================*/
/*
 * Copyright (C) 2008 The Trustees of Indiana University.
 * Use, modification and distribution is subject to the Boost Software
 * License, Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt)
 */

#ifndef vtkDistributedGraphHelper_h
#define vtkDistributedGraphHelper_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"

class vtkDistributedGraphHelperInternals;
struct vtkEdgeType;
class vtkGraph;
class vtkVariant;
class vtkVariantArray;
class vtkInformationIntegerKey;

// .NAME vtkVertexPedigreeIdDistributionFunction - The type of a
// function used to determine how to distribute vertex pedigree IDs
// across processors in a vtkGraph. The pedigree ID distribution
// function takes the pedigree ID of the vertex and a user-supplied
// void pointer and returns a hash value V. A vertex with that
// pedigree ID will reside on processor V % P, where P is the number
// of processors. This type is used in conjunction with the
// vtkDistributedGraphHelper class.
typedef vtkIdType (*vtkVertexPedigreeIdDistribution)
          (const vtkVariant& pedigreeId, void* userData);

class VTKCOMMONDATAMODEL_EXPORT vtkDistributedGraphHelper : public vtkObject
{
 public:
  vtkTypeMacro(vtkDistributedGraphHelper,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  vtkIdType GetVertexOwner(vtkIdType v) const;

  vtkIdType GetVertexIndex(vtkIdType v) const;

  vtkIdType GetEdgeOwner(vtkIdType e_id) const;

  vtkIdType GetEdgeIndex(vtkIdType e_id) const;

  vtkIdType MakeDistributedId(int owner, vtkIdType local);

  void SetVertexPedigreeIdDistribution(vtkVertexPedigreeIdDistribution Func,
                                       void *userData);

  vtkIdType GetVertexOwnerByPedigreeId(const vtkVariant& pedigreeId);

  virtual void Synchronize() = 0;

  virtual vtkDistributedGraphHelper *Clone() = 0;


  static vtkInformationIntegerKey * DISTRIBUTEDVERTEXIDS();
  static vtkInformationIntegerKey * DISTRIBUTEDEDGEIDS();

 protected:
  vtkDistributedGraphHelper();
  ~vtkDistributedGraphHelper() override;

  virtual void AddVertexInternal(vtkVariantArray *propertyArr,
                         vtkIdType *vertex) = 0;

  virtual void AddVertexInternal(const vtkVariant& pedigreeId, vtkIdType *vertex) = 0;

  virtual void AddEdgeInternal(vtkIdType u, vtkIdType v, bool directed,
                               vtkVariantArray *propertyArr,
                               vtkEdgeType *edge) = 0;

  virtual void AddEdgeInternal(const vtkVariant& uPedigreeId, vtkIdType v,
                               bool directed, vtkVariantArray *propertyArr,
                               vtkEdgeType *edge) = 0;

  virtual void AddEdgeInternal(vtkIdType u, const vtkVariant& vPedigreeId,
                               bool directed, vtkVariantArray *propertyArr,
                               vtkEdgeType *edge) = 0;

  virtual void AddEdgeInternal(const vtkVariant& uPedigreeId,
                               const vtkVariant& vPedigreeId,
                               bool directed, vtkVariantArray *propertyArr,
                               vtkEdgeType *edge) = 0;

  virtual vtkIdType FindVertex(const vtkVariant& pedigreeId) = 0;

  virtual void
  FindEdgeSourceAndTarget(vtkIdType id,
                          vtkIdType *source, vtkIdType *target) = 0;

  virtual void AttachToGraph(vtkGraph *graph);

  vtkGraph *Graph;

  vtkVertexPedigreeIdDistribution VertexDistribution;

  void *VertexDistributionUserData;

  vtkIdType signBitMask;

  vtkIdType highBitShiftMask;

  int procBits;

  int indexBits;

 private:
  vtkDistributedGraphHelper(const vtkDistributedGraphHelper&) = delete;
  void operator=(const vtkDistributedGraphHelper&) = delete;

  friend class vtkGraph;

};

#endif // vtkDistributedGraphHelper_h