1 2 #ifndef WK_IO_H 3 #define WK_IO_H 4 5 class WKProvider { 6 public: 7 virtual bool seekNextFeature() = 0; 8 virtual bool featureIsNull() = 0; 9 virtual size_t nFeatures() = 0; 10 virtual void reset() = 0; ~WKProvider()11 virtual ~WKProvider() {} 12 }; 13 14 class WKExporter { 15 public: WKExporter(size_t size)16 WKExporter(size_t size): size(size) {} 17 virtual void prepareNextFeature() = 0; 18 virtual void writeNull() = 0; 19 virtual void writeNextFeature() = 0; nFeatures()20 size_t nFeatures() { 21 return this->size; 22 } 23 ~WKExporter()24 virtual ~WKExporter() {} 25 26 private: 27 size_t size; 28 }; 29 30 #endif 31