/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: DIndex.hxx,v $
 *
 *  $Revision: 1.12 $
 *
 *  last change: $Author: rt $ $Date: 2005-09-08 07:03:24 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

#ifndef _CONNECTIVITY_DBASE_INDEX_HXX_
#define _CONNECTIVITY_DBASE_INDEX_HXX_

#ifndef _CONNECTIVITY_SDBCX_INDEX_HXX_
#include "connectivity/sdbcx/VIndex.hxx"
#endif
#ifndef _COM_SUN_STAR_LANG_XUNOTUNNEL_HPP_
#include <com/sun/star/lang/XUnoTunnel.hpp>
#endif
#ifndef _CONNECTIVITY_DBASE_TABLE_HXX_
#include "dbase/DTable.hxx"
#endif
#ifndef _CONNECTIVITY_DBASE_INDEXNODE_HXX_
#include "dbase/dindexnode.hxx"
#endif

#define dBASE_III_GROUP "dBase III"

namespace connectivity
{
    namespace dbase
    {
        class OIndexIterator;
        class ONDXKey;

        typedef sdbcx::OIndex ODbaseIndex_BASE;
        typedef file::OBoolOperator OBoolOperator_BASE;
        typedef file::OOperand OOperand_BASE;

        class ODbaseIndex : public ODbaseIndex_BASE
        {
            friend SvStream& operator << (SvStream &rStream, ODbaseIndex&);
            friend SvStream& operator >> (SvStream &rStream, ODbaseIndex&);

            friend class ONDXNode;
            friend class ONDXPage;
            friend class ONDXPagePtr;
            friend class OIndexIterator;

        public:
            //==================================================================
            // Kopfsatz-Struktur, verbleibt im Speicher
            //==================================================================
            struct NDXHeader
            {
                sal_uInt32  db_rootpage;                    /* Position der Rootpage        */
                sal_uInt32  db_pagecount;                   /* Anzahl Pages                 */
                sal_uInt8   db_frei[4];                     /* reserviert                   */
                sal_uInt16  db_keylen;                      /* Laenge des Schluessels       */
                sal_uInt16  db_maxkeys;                     /* Max. # keys pro Seite        */
                sal_uInt16  db_keytype;                     /* Art des Schluessels
                                                           (0-Text)
                                                           (1-Numerisch)                */
                sal_uInt16  db_keyrec;                      /* Laenge eines IndexSatzes
                                                           SatzNr + keylen              */
                sal_uInt8   db_frei1[3];                    /* reserviert                   */
                sal_uInt8   db_unique;                      /* eindeutig                    */
                char        db_name[488];                   /* index_name   (Feldname)      */
            };

        private:
            SvStream*       m_pFileStream;                  // Stream zum Lesen/Schreiben des Index
            NDXHeader       m_aHeader;
            ONDXPageList    m_aCollector;                   // Pool von nicht mehr benoetigten Seiten
            ONDXPagePtr     m_aRoot,                        // Wurzel des b+ Baums
                            m_aCurLeaf;                 // aktuelles Blatt
            USHORT          m_nCurNode;                 // Position des aktuellen Knoten

            sal_uInt32          m_nPageCount,
                            m_nRootPage;

            ODbaseTable*    m_pTable;
            BOOL            m_bUseCollector : 1;                        // Verwenden des GarbageCollectors

            ::rtl::OUString getCompletePath();
            void closeImpl();
        protected:
            virtual ~ODbaseIndex();
        public:
            ODbaseIndex(ODbaseTable* _pTable);
            ODbaseIndex(ODbaseTable* _pTable,const NDXHeader& _aHeader,const ::rtl::OUString& _Name);

            sal_Bool openIndexFile();
            virtual void refreshColumns();

            // com::sun::star::lang::XUnoTunnel
            virtual sal_Int64 SAL_CALL getSomething( const com::sun::star::uno::Sequence< sal_Int8 >& aIdentifier ) throw(com::sun::star::uno::RuntimeException);
            static com::sun::star::uno::Sequence< sal_Int8 > getUnoTunnelImplementationId();

            virtual void SAL_CALL acquire() throw();
            virtual void SAL_CALL release() throw();

            const ODbaseTable* getTable() const { return m_pTable; }
            const NDXHeader& getHeader() const { return m_aHeader; }
            virtual OIndexIterator* createIterator(OBoolOperator_BASE* pOp,
                                                         const OOperand_BASE* pOperand = NULL);

            void SetRootPos(sal_uInt32 nPos)        {m_nRootPage = nPos;}
            void SetPageCount(sal_uInt32 nCount)    {m_nPageCount = nCount;}

            sal_uInt32 GetRootPos()                 {return m_nRootPage;}
            sal_uInt32 GetPageCount()               {return m_nPageCount;}

            BOOL IsText() const                 {return m_aHeader.db_keytype == 0;}
            USHORT GetMaxNodes() const          {return m_aHeader.db_maxkeys;}

            virtual BOOL Insert(sal_uInt32 nRec, const ORowSetValue& rValue);
            virtual BOOL Update(sal_uInt32 nRec, const ORowSetValue&, const ORowSetValue&);
            virtual BOOL Delete(sal_uInt32 nRec, const ORowSetValue& rValue);
            virtual BOOL Find(sal_uInt32 nRec, const ORowSetValue& rValue);

            void createINFEntry();
            BOOL CreateImpl();
            BOOL DropImpl();

            DECLARE_SERVICE_INFO();
        protected:

            ONDXPage* CreatePage(sal_uInt32 nPagePos, ONDXPage* pParent = NULL, BOOL bLoad = FALSE);
            void Collect(ONDXPage*);
            ONDXPagePtr getRoot();

            sal_Bool isUnique() const { return m_IsUnique; }
            BOOL UseCollector() const {return m_bUseCollector;}
            // Tree operationen
            void Insert(ONDXPagePtr aCurPage, ONDXNode& rNode);
            void Release(BOOL bSave = TRUE);
            BOOL ConvertToKey(ONDXKey* rKey, sal_uInt32 nRec, const ORowSetValue& rValue);
        };

        SvStream& operator << (SvStream &rStream, ODbaseIndex&);
        SvStream& operator >> (SvStream &rStream, ODbaseIndex&);
    }
}

#endif // _CONNECTIVITY_DBASE_INDEX_HXX_