DataSourceUser.h

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#ifndef ELEMENTSEXAMPLES_ELEMENTSEXAMPLES_DATASOURCEUSER_H_
#define ELEMENTSEXAMPLES_ELEMENTSEXAMPLES_DATASOURCEUSER_H_
 
#include <cstdlib>  // for std::size_t
 
#include "ElementsKernel/Export.h"  // For ELEMENTS_API
 
namespace Elements {
namespace Examples {
 
class DataSourceInterface {
 
public:
  virtual std::size_t countRecords() const = 0;
 
  virtual double getRecordValue(std::size_t index) const = 0;
 
  virtual ~DataSourceInterface() = default;
};
 
class ELEMENTS_API DataSourceUser {
 
public:
  double sumRecords(const DataSourceInterface& data_source);
};
 
}  // namespace Examples
}  // namespace Elements
 
#endif  // ELEMENTSEXAMPLES_ELEMENTSEXAMPLES_DATASOURCEUSER_H_