ICRS.hpp

#pragma once
 
#include "DM/config.hpp"
#include "DM/Handle.hpp"
#include "DM/Log.hpp"
 
DM_NAMESPACE_BEGIN
 
enum struct CRSCompareMode
{
  strict    = 0,
  ignoreAxisOrder = 1,
  ignoreVerticalCRS = 2,
  maxTolerance = 3
};
 
constexpr CRSCompareMode  operator| (const CRSCompareMode  &left, const CRSCompareMode  &right)
{
  return static_cast<CRSCompareMode>(static_cast<int>(left) | static_cast<int>(right));
}
 
 
/// Interface for coordinate reference system
class DM_API ICRS : public ObjectBase
{
public:
  static void set_default_unification(bool flag);             // activated or deactivated automatic unification for all wkt strings
  static void set_default_compare_mode(CRSCompareMode mode);  // set default comparision mode
  static void set_default_accept_invalid_wkts(bool accept);   // set default flag for accepting invalid wkts
 
  // create functions will not throw exception but rather return an no object in case of error
  static ICRS* New(LogFn logFn = 0) noexcept;                                          //create empty 
  static ICRS* NewFromWKT(const char* wktStr, LogFn logFn = 0) noexcept;               //create object from wkt string
  static ICRS* NewFromWKT(const char* wktStr, bool acceptInvalidWkt, bool unify, LogFn logFn = 0) noexcept;  //create object from wkt string and unify
  static ICRS* NewFromEPSG(int epsg, LogFn logFn = 0) noexcept;                        //create object from epsg code
  static ICRS* NewFromEPSG(const char* epsgCode, LogFn logFn = 0) noexcept;            //create object from epsg code (as string)
 
 
protected:
  virtual ~ICRS() {}
 
public:
  virtual bool empty() const = 0; 
  virtual bool valid() const = 0; 
 
  virtual bool leftHanded() const = 0;
 
  virtual int getEPSGCode() const = 0;    
  virtual const char* wkt() const = 0;
 
  virtual const char* sourceWKT() const = 0;
  virtual const char* exportWKT() const = 0;
  
  virtual bool unify() = 0;
  
  virtual bool equal(const ICRS &other) const = 0;
  virtual bool equal(const ICRS &other, CRSCompareMode mod) const = 0;
  
  virtual ICRS* stripVerticalComponent() const = 0;
 
  virtual void test_code(int) const = 0;
};
 
typedef Handle< ICRS > CRSHandle;
 
DM_NAMESPACE_END