OciField.h

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#ifndef __DCL_OCI_FIELD_H__
#define __DCL_OCI_FIELD_H__     20020321
 
#include "OciData.h"
 
__DCL_BEGIN_NAMESPACE
 
class BytesOutputStream;
 
class OciField  : public SQL::Field, public OciData
{
    DECLARE_CLASSINFO(OciField)
protected:
    OCIDefine*  __define; 
 
    // Prepared 필드 데이터, 버퍼의 데이터 OciData::__dataType과 다를 수 있다.
    ub2         __dataType;
    // OciData::__dynamicMode = OCI_DYNAMIC_FETCH를 위한 버퍼사이즈
    ub2         __bufferSize;
 
    OciQuery* query() const;
 
public:
    bool init(SQL::Query* _query, size_t _position);
 
    OciField();
    virtual ~OciField();
 
    // interfaces
    virtual bool isNull() const;
    virtual const wchar_t* serverDataTypeName() const;
    virtual bool __getDataSize(size_t* _size, bool _maxSize);
    virtual bool __getData(
            void* _pv,
            size_t* _size,
            SQL::DataType _dataType
            );
 
protected:
    // implementation
    static sb4 CallbackDefine(
            dvoid       *octxp,
            OCIDefine   *defnp,
            ub4         iter,
            dvoid       **bufpp,
            ub4         **alenpp,
            ub1         *piecep,
            dvoid       **indpp,
            ub2         **rcodep
            );
 
    sb4 onCallbackDefine(
            OCIDefine*  pDefine,
            ub4         nIterator,
            dvoid**     ppvBuffer,
            ub4**       ppnActualLength,
            ub1*        pnPiece,
            dvoid**     ppvIndicator,
            ub2**       ppnReturnCode
            );
};
 
inline OciQuery* OciField::query() const 
{ 
    return (OciQuery*)Field::__queryHandle; 
}
 
__DCL_END_NAMESPACE
 
#endif  // __DCL_OCI_FIELD_H__