AOO410/main/connectivity/source/inc/dbase/DIndex.hxx

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 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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#ifndef _CONNECTIVITY_DBASE_INDEX_HXX_
#define _CONNECTIVITY_DBASE_INDEX_HXX_

#include "connectivity/sdbcx/VIndex.hxx"
#include <com/sun/star/lang/XUnoTunnel.hpp>
#include "dbase/DTable.hxx"
#include "dbase/dindexnode.hxx"

#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
			sal_uInt16			m_nCurNode;					// Position des aktuellen Knoten

			sal_uInt32			m_nPageCount,
							m_nRootPage;

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

			::rtl::OUString getCompletePath();
			void closeImpl();
            /* closes and kill the index file and throws an error.
            */
            void impl_killFileAndthrowError_throw(sal_uInt16 _nErrorId,const ::rtl::OUString& _sFile);
		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;}

			sal_Bool IsText() const					{return m_aHeader.db_keytype == 0;}
			sal_uInt16 GetMaxNodes() const			{return m_aHeader.db_maxkeys;}

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

			void createINFEntry();
			sal_Bool CreateImpl();
			sal_Bool DropImpl();

			DECLARE_SERVICE_INFO();
		protected:

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

			sal_Bool isUnique() const { return m_IsUnique; }
			sal_Bool UseCollector() const {return m_bUseCollector;}
			// Tree operationen
			void Insert(ONDXPagePtr aCurPage, ONDXNode& rNode);
			void Release(sal_Bool bSave = sal_True);
			sal_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_