vtkGeoJSONFeature.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkGeoJSONFeature.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.
 
=========================================================================*/
#ifndef vtkGeoJSONFeature_h
#define vtkGeoJSONFeature_h
 
// VTK Includes
#include "vtkDataObject.h"
#include "vtkIOGeoJSONModule.h" // For export macro
#include "vtk_jsoncpp.h"        // For json parser
 
class vtkPolyData;
 
// Currently implemented geoJSON compatible Geometries
#define GeoJSON_POINT "Point"
#define GeoJSON_MULTI_POINT "MultiPoint"
#define GeoJSON_LINE_STRING "LineString"
#define GeoJSON_MULTI_LINE_STRING "MultiLineString"
#define GeoJSON_POLYGON "Polygon"
#define GeoJSON_MULTI_POLYGON "MultiPolygon"
#define GeoJSON_GEOMETRY_COLLECTION "GeometryCollection"
 
class VTKIOGEOJSON_EXPORT vtkGeoJSONFeature : public vtkDataObject
{
public:
  static vtkGeoJSONFeature* New();
  void PrintSelf(ostream& os, vtkIndent indent) override;
  vtkTypeMacro(vtkGeoJSONFeature, vtkDataObject);
 
  int GetDataObjectType() override { return VTK_GEO_JSON_FEATURE; }
 
 
  vtkSetMacro(OutlinePolygons, bool);
  vtkGetMacro(OutlinePolygons, bool);
  vtkBooleanMacro(OutlinePolygons, bool);
 
  void ExtractGeoJSONFeature(const Json::Value& root, vtkPolyData* outputData);
 
protected:
  vtkGeoJSONFeature();
  ~vtkGeoJSONFeature() override;
 
  Json::Value featureRoot;
 
  char* FeatureId;
 
  bool OutlinePolygons;
 
  void ExtractGeoJSONFeatureGeometry(const Json::Value& root, vtkPolyData* outputData);
 
 
  vtkPolyData* ExtractPoint(const Json::Value& coordinates, vtkPolyData* outputData);
  vtkPolyData* ExtractLineString(const Json::Value& coordinates, vtkPolyData* outputData);
  vtkPolyData* ExtractPolygon(const Json::Value& coordinates, vtkPolyData* outputData);
 
 
  vtkPolyData* ExtractMultiPoint(const Json::Value& coordinates, vtkPolyData* outputData);
  vtkPolyData* ExtractMultiLineString(const Json::Value& coordinates, vtkPolyData* outputData);
  vtkPolyData* ExtractMultiPolygon(const Json::Value& coordinates, vtkPolyData* outputData);
 
 
  bool IsPoint(const Json::Value& root);
  bool IsMultiPoint(const Json::Value& root);
  bool IsLineString(const Json::Value& root);      // To Do.
  bool IsMultiLineString(const Json::Value& root); // To Do.
  bool IsPolygon(const Json::Value& root);         // To Do.
  bool IsMultiPolygon(const Json::Value& root);    // To Do.
 
  bool CreatePoint(const Json::Value& coordinates, double point[3]);
 
  void InsertFeatureProperties(vtkPolyData* outputData);
 
private:
  vtkGeoJSONFeature(const vtkGeoJSONFeature&) = delete;
  void operator=(const vtkGeoJSONFeature&) = delete;
};
 
#endif // vtkGeoJSONFeature_h