GisTopology.h

Go to the documentation of this file.

#ifndef GisTopology_h
#define GisTopology_h

// geos library for types GEOSGeometry, GEOSPreparedGeometry, GEOSCoordSequence, 
// GEOSWKTReader, GEOSWKTWriter, GEOSWKBReader, GEOSWKBWriter 
#include <geos_c.h>

class QString;

namespace Isis {

  class GisTopology {
    public:

      enum Disposition { 
             DestroyGeometry, 
             PreserveGeometry 
      };
  
      static GisTopology *instance();
  
      GEOSGeometry *geomFromWKB(const QString &wkb);
      GEOSGeometry *geomFromWKT(const QString &wkt);
      GEOSGeometry *clone(const GEOSGeometry *geom) const;
      const GEOSPreparedGeometry *preparedGeometry(const GEOSGeometry *geom) const;
  
  
      QString wkb(const GEOSGeometry *geom, 
                  const Disposition &disp = PreserveGeometry);
      QString wkt(const GEOSGeometry *geom, 
                  const Disposition &disp = PreserveGeometry);
  
      void destroy(GEOSGeometry *geom) const;
      void destroy(const GEOSGeometry *geom) const;
      void destroy(const GEOSPreparedGeometry *ppgeom) const;
      void destroy(GEOSCoordSequence *sequence) const;
      void destroy(const unsigned char *geos_text) const;
      void destroy(const char *geos_text) const;
  
    private:
      GisTopology();
      ~GisTopology();
  
      static void dieAtExit();
  
      void initialize();
  
      //  Initialize and shut down GEOS C API
      void geosInit();
      void geosFinish();
  
      static void notice(const char *fmt, ...);
      static void error(const char *fmt, ...);
       
      //  Reader/Writer allocations
      GEOSWKTReader *wktReader();
      GEOSWKTWriter *wktWriter();
  
      GEOSWKBReader *wkbReader();
      GEOSWKBWriter *wkbWriter();
  
      static GisTopology *m_gisfactory; 
      GEOSWKTReader *m_WKTreader;       
      GEOSWKTWriter *m_WKTwriter;       
      GEOSWKBReader *m_WKBreader;       
      GEOSWKBWriter *m_WKBwriter;       
  
  };

}  // namespace Isis

#endif