sql_interface.h

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#ifndef SDK_BASE_SQL_INTERFACE_H_
#define SDK_BASE_SQL_INTERFACE_H_
 
#include <base/inc/platform.h>
#include <base/inc/base_types.h>
#include <base/inc/sdk_component_interface.h>
#include <base/inc/sdk_ref_ptr.h>
#include <base/inc/sdk_any_handler.h>
 
namespace sdk {
namespace sql {
 
// Classes declared in this file
FWD_DECL_INTERFACE(IConnection);
FWD_DECL_INTERFACE(IRowSet);
 
class IConnection : public ISDKComponent {
public:
  virtual SDKResult SDK_CALLTYPE Open(
    const SDKString& connection_string) throw() = 0;
 
  virtual SDKResult SDK_CALLTYPE Close() throw() = 0;
 
  SDK_IMPLEMENT_IID(IConnection)
  SDK_END_INTERFACE(IConnection)
};
SDK_DECLARE_IID(IConnection)
 
class IRowSet : public ISDKComponent {
public:
  virtual SDKResult SDK_CALLTYPE Rows(SDKUInt64& rows) throw() = 0;
  virtual SDKResult SDK_CALLTYPE Move(SDKUInt64 row) throw() = 0;
  virtual SDKResult SDK_CALLTYPE MoveNext() throw() = 0;
  virtual SDKResult SDK_CALLTYPE MoveFirst() throw() = 0;
  virtual SDKResult SDK_CALLTYPE GetValue(SDKUInt32 col, 
    SDKAny& value) const throw() = 0;
  virtual SDKResult SDK_CALLTYPE GetValueByColumnName(const char* col, 
    SDKAny& value) const throw() = 0;
  
  template<typename T>
  SDKResult GetValueT(SDKUInt32 col, T& out_value) throw() {
    SDK_NAMESPACE::ScopedAny value;
    SDKResult res = GetValue(col, value);
    if (SDK_FAILED(res))
      return res;
    return value.GetAs< T >(out_value) ? 
      kSDKResult_Succeeded : kSDKResult_InvalidArgument;
  }
 
  SDK_IMPLEMENT_IID(IRowSet)
  SDK_END_INTERFACE(IRowSet)
};
SDK_DECLARE_IID(IRowSet)
 
} // namespace sql
} // namespace sdk 
 
#endif // SDK_BASE_SQL_INTERFACE_H_