vtkPGenericIOMultiBlockReader.h

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// SPDX-FileCopyrightText: Copyright (c) Kitware Inc.
// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkPGenericIOMultiBlockReader_h
#define vtkPGenericIOMultiBlockReader_h

#include "vtkMultiBlockDataSetAlgorithm.h"
#include "vtkPVVTKExtensionsCosmoToolsModule.h" // For export macro

#include <set> // For std::set

class vtkCallbackCommand;
class vtkDataArraySelection;
class vtkMultiProcessController;
class vtkStringArray;
class vtkIdList;
class vtkUnstructuredGrid;
class vtkInformationDoubleKey;

// GenericIO forward declarations
namespace gio
{
class GenericIOReader;
}

class VTKPVVTKEXTENSIONSCOSMOTOOLS_EXPORT vtkPGenericIOMultiBlockReader
  : public vtkMultiBlockDataSetAlgorithm
{
public:
  enum IOType
  {
    IOTYPEMPI,
    IOTYPEPOSIX
  };

  enum BlockAssignment
  {
    ROUND_ROBIN,
    RCB
  };

  static vtkPGenericIOMultiBlockReader* New();
  vtkTypeMacro(vtkPGenericIOMultiBlockReader, vtkMultiBlockDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkSetStringMacro(XAxisVariableName);
  vtkGetStringMacro(XAxisVariableName);


  vtkSetStringMacro(YAxisVariableName);
  vtkGetStringMacro(YAxisVariableName);


  vtkSetStringMacro(ZAxisVariableName);
  vtkGetStringMacro(ZAxisVariableName);


  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);


  vtkSetMacro(GenericIOType, int);
  vtkGetMacro(GenericIOType, int);


  vtkSetMacro(BlockAssignment, int);
  vtkGetMacro(BlockAssignment, int);


  vtkGetObjectMacro(ArrayList, vtkStringArray);


  vtkGetObjectMacro(PointDataArraySelection, vtkDataArraySelection);


  vtkGetMacro(Controller, vtkMultiProcessController*);
  vtkSetMacro(Controller, vtkMultiProcessController*);

  int GetNumberOfPointArrays();

  const char* GetPointArrayName(int i);

  int GetPointArrayStatus(const char* name);

  void SetPointArrayStatus(const char* name, int status);


  vtkSetStringMacro(HaloIdVariableName);
  vtkGetStringMacro(HaloIdVariableName);

  vtkIdType GetRequestedHaloId(vtkIdType i);

  vtkIdType GetNumberOfRequestedHaloIds();

  void SetNumberOfRequestedHaloIds(vtkIdType numIds);

  void AddRequestedHaloId(vtkIdType haloId);

  void ClearRequestedHaloIds();

  void SetRequestedHaloId(vtkIdType i, vtkIdType haloId);

protected:
  vtkPGenericIOMultiBlockReader();
  ~vtkPGenericIOMultiBlockReader();

  char* XAxisVariableName;
  char* YAxisVariableName;
  char* ZAxisVariableName;
  char* HaloIdVariableName;

  char* FileName;
  int GenericIOType;
  int BlockAssignment;

  bool BuildMetaData;

  vtkMultiProcessController* Controller;

  vtkStringArray* ArrayList;
  vtkDataArraySelection* PointDataArraySelection;
  vtkIdList* HaloList;
  vtkCallbackCommand* SelectionObserver;

  gio::GenericIOReader* Reader;

  gio::GenericIOReader* GetInternalReader();

  bool ReaderParametersChanged();

  void LoadMetaData();

  void LoadRawVariableDataForBlock(const std::string& varName, int blockId);

  void LoadRawDataForBlock(int blockId);

  void GetPointFromRawData(int xType, void* xBuffer, int yType, void* yBuffer, int zType,
    void* zBuffer, vtkIdType id, double point[3]);

  void LoadCoordinatesForBlock(
    vtkUnstructuredGrid* grid, std::set<vtkIdType>& pointsInSelectedHalos, int blockId);

  void LoadDataArraysForBlock(
    vtkUnstructuredGrid* grid, const std::set<vtkIdType>& pointsInSelectedHalos, int blockId);

  vtkUnstructuredGrid* LoadBlock(int blockId);

  static void SelectionModifiedCallback(
    vtkObject* caller, unsigned long eid, void* clientdata, void* calldata);

  // Pipeline methods
  virtual int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*);
  virtual int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*);

private:
  vtkPGenericIOMultiBlockReader(const vtkPGenericIOMultiBlockReader&) = delete;
  void operator=(const vtkPGenericIOMultiBlockReader&) = delete;
  // Internal helper class
  class vtkGenericIOMultiBlockMetaData;
  vtkGenericIOMultiBlockMetaData* MetaData;
};

#endif