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#ifndef _CONNECTIVITY_DBASE_INDEXITER_HXX_
#define _CONNECTIVITY_DBASE_INDEXITER_HXX_

#include "file/fcode.hxx"
#include "dbase/DIndex.hxx"
#include "dbase/dindexnode.hxx"

namespace connectivity
{
    namespace dbase
    {
        //==================================================================
        // IndexIterator
        //==================================================================
        class OIndexIterator
        {
        protected:
            file::OBoolOperator*	m_pOperator;
            const file::OOperand* 	m_pOperand;
            ODbaseIndex*			m_pIndex;
            ONDXPagePtr				m_aRoot,
                                    m_aCurLeaf;
            USHORT					m_nCurNode;

        protected:
            ULONG Find(BOOL bFirst);
            ULONG GetCompare(BOOL bFirst);
            ULONG GetLike(BOOL bFirst);
            ULONG GetNull(BOOL bFirst);
            ULONG GetNotNull(BOOL bFirst);

            ONDXKey* GetFirstKey(ONDXPage* pPage,
                                const file::OOperand& rKey);
            ONDXKey* GetNextKey();
            ODbaseIndex* GetIndex() const {return m_pIndex;}


        public:
            OIndexIterator(ODbaseIndex* pInd,
                            file::OBoolOperator* pOp,
                            const file::OOperand* pOper)
                :m_pOperator(pOp)
                ,m_pOperand(pOper)
                ,m_pIndex(pInd)
                ,m_nCurNode(NODE_NOTFOUND)
            {
                pInd->acquire();
            }

            virtual ~OIndexIterator();
            ULONG First();
            ULONG Next();

        };
    }
}
#endif // _CONNECTIVITY_DBASE_INDEXITER_HXX_

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