vtkDataObjectImplicitBackendInterface.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkDataObjectImplicitBackendInterface_h
#define vtkDataObjectImplicitBackendInterface_h
 
#include "vtkCommonDataModelModule.h"
 
#include "vtkAOSDataArrayTemplate.h"
#include "vtkDataArrayMeta.h"
#include "vtkSmartPointer.h" // for internal member
#include "vtkWeakPointer.h"  // for internal member
 
VTK_ABI_NAMESPACE_BEGIN
 
class vtkDataObject;
class vtkObject;
 
template <typename ValueType>
struct VTKCOMMONDATAMODEL_EXPORT vtkDataObjectImplicitBackendInterface
{
  vtkDataObjectImplicitBackendInterface(
    vtkDataObject* dataobject, const std::string& arrayName, int attributeType);
 
  virtual ~vtkDataObjectImplicitBackendInterface();
 
  ValueType operator()(vtkIdType idx) const;
 
protected:
  void OnDataObjectDeleted(vtkObject* caller, unsigned long eventId, void* calldata);
 
  virtual ValueType GetValueFromDataObject(vtkIdType idx) const = 0;
 
  vtkDataObject* GetDataObject() { return this->DataObject; }
 
private:
  vtkDataArray* GetArray();
 
  vtkWeakPointer<vtkDataObject> DataObject;
 
  vtkSmartPointer<vtkAOSDataArrayTemplate<ValueType>> Cache;
  std::string ArrayName;
  int AttributeType;
};
 
VTK_ABI_NAMESPACE_END
#endif
 
#if defined(VTK_DATAOBJECT_BACKEND_INSTANTIATING)
 
#define VTK_INSTANTIATE_DATAOBJECT_BACKEND(ValueType)                                              \
  VTK_ABI_NAMESPACE_BEGIN                                                                          \
  template struct VTKCOMMONDATAMODEL_EXPORT vtkDataObjectImplicitBackendInterface<ValueType>;      \
  VTK_ABI_NAMESPACE_END
 
#elif defined(VTK_USE_EXTERN_TEMPLATE)
 
#ifndef VTK_DATAOBJECT_BACKEND_TEMPLATE_EXTERN
#define VTK_DATAOBJECT_BACKEND_TEMPLATE_EXTERN
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4910) // extern and dllexport incompatible
#endif
VTK_ABI_NAMESPACE_BEGIN
vtkExternTemplateMacro(
  extern template struct VTKCOMMONDATAMODEL_EXPORT vtkDataObjectImplicitBackendInterface);
VTK_ABI_NAMESPACE_END
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif // VTK_DATAOBJECT_IMPLICIT_BACKEND_TEMPLATE_EXTERN
 
#endif