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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file 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 "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_CONNECTIVITY_SOURCE_INC_TSKIPDELETEDSET_HXX
#define INCLUDED_CONNECTIVITY_SOURCE_INC_TSKIPDELETEDSET_HXX
#include "TResultSetHelper.hxx"
#include <rtl/alloc.h>
#include <unordered_map>
#include <vector>
#include <connectivity/dbtoolsdllapi.hxx>
namespace connectivity
{
/**
the class OSkipDeletedSet supports a general method to skip deleted rows
*/
class OOO_DLLPUBLIC_DBTOOLS OSkipDeletedSet
{
std::vector<sal_Int32> m_aBookmarksPositions;// vector of iterators to position map, the order is the logical position
IResultSetHelper* m_pHelper; // used for moving in the resultset
bool m_bDeletedVisible;
bool moveAbsolute(sal_Int32 _nOffset,bool _bRetrieveData);
public:
OSkipDeletedSet(IResultSetHelper* _pHelper);
~OSkipDeletedSet();
inline static void * SAL_CALL operator new( size_t nSize )
{ return ::rtl_allocateMemory( nSize ); }
inline static void * SAL_CALL operator new( size_t,void* _pHint )
{ return _pHint; }
inline static void SAL_CALL operator delete( void * pMem )
{ ::rtl_freeMemory( pMem ); }
inline static void SAL_CALL operator delete( void *,void* )
{ }
/**
skipDeleted moves the resultset to the position defined by the parameters
it guarantees that the row isn't deleted
@param
IResultSetHelper::Movement _eCursorPosition in which direction the resultset should be moved
sal_Int32 _nOffset the position relative to the movement
sal_Bool _bRetrieveData is true when the current row should be filled which data
@return
true when the movement was successful otherwise false
*/
bool skipDeleted(IResultSetHelper::Movement _eCursorPosition, sal_Int32 _nOffset, bool _bRetrieveData);
/**
clear the map and the vector used in this class
*/
void clear();
/**
getMappedPosition returns the mapped position of a logical position
@param
sal_Int32 _nBookmark the logical position
@return the mapped position
*/
sal_Int32 getMappedPosition(sal_Int32 _nBookmark) const;
/**
insertNewPosition adds a new position to the map
@param
sal_Int32 _nPos the logical position
*/
void insertNewPosition(sal_Int32 _nPos);
/**
deletePosition deletes this position from the map and decrement all following positions
@param
sal_Int32 _nPos the logical position
*/
void deletePosition(sal_Int32 _nPos);
inline void SetDeletedVisible(bool _bDeletedVisible) { m_bDeletedVisible = _bDeletedVisible; }
};
}
#endif // INCLUDED_CONNECTIVITY_SOURCE_INC_TSKIPDELETEDSET_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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