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Diffstat (limited to '')
| -rw-r--r-- | connectivity/source/commontools/TSkipDeletedSet.cxx | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/connectivity/source/commontools/TSkipDeletedSet.cxx b/connectivity/source/commontools/TSkipDeletedSet.cxx new file mode 100644 index 000000000..701bd743f --- /dev/null +++ b/connectivity/source/commontools/TSkipDeletedSet.cxx @@ -0,0 +1,255 @@ +/* -*- 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 . + */ + +#include <TSkipDeletedSet.hxx> +#include <osl/diagnose.h> +#include <sal/log.hxx> +#include <algorithm> + +using namespace connectivity; + +OSkipDeletedSet::OSkipDeletedSet(IResultSetHelper* _pHelper) + : m_pHelper(_pHelper) + ,m_bDeletedVisible(false) +{ + m_aBookmarksPositions.reserve(256); +} + +OSkipDeletedSet::~OSkipDeletedSet() +{ + m_aBookmarksPositions.clear(); + //m_aBookmarks.clear(); +} + +bool OSkipDeletedSet::skipDeleted(IResultSetHelper::Movement _eCursorPosition, sal_Int32 _nOffset, bool _bRetrieveData) +{ + OSL_ENSURE(_eCursorPosition != IResultSetHelper::BOOKMARK,"OSkipDeletedSet::SkipDeleted can't be called for BOOKMARK"); + + IResultSetHelper::Movement eDelPosition = _eCursorPosition; + sal_Int32 nDelOffset = abs(_nOffset); + + switch (_eCursorPosition) + { + case IResultSetHelper::ABSOLUTE1: + return moveAbsolute(_nOffset,_bRetrieveData); + case IResultSetHelper::FIRST: // set the movement when positioning failed + eDelPosition = IResultSetHelper::NEXT; + nDelOffset = 1; + break; + case IResultSetHelper::LAST: + eDelPosition = IResultSetHelper::PRIOR; // last row is invalid so position before + nDelOffset = 1; + break; + case IResultSetHelper::RELATIVE1: + eDelPosition = (_nOffset >= 0) ? IResultSetHelper::NEXT : IResultSetHelper::PRIOR; + break; + default: + break; + } + + bool bDone = true; + bool bDataFound = false; + + if (_eCursorPosition == IResultSetHelper::LAST) + { + SAL_INFO( "connectivity.commontools", "OSkipDeletedSet::skipDeleted: last" ); + sal_Int32 nBookmark = 0; + // first position on the last known row + if ( m_aBookmarksPositions.empty() ) + { + bDataFound = m_pHelper->move(IResultSetHelper::FIRST, 0, _bRetrieveData); + if(bDataFound && (m_bDeletedVisible || !m_pHelper->isRowDeleted())) + //m_aBookmarksPositions.push_back(m_aBookmarks.emplace( m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first); + m_aBookmarksPositions.push_back(m_pHelper->getDriverPos()); + } + else + { + // I already have a bookmark so we can positioned on that and look if it is the last one + nBookmark = (*m_aBookmarksPositions.rbegin())/*->first*/; + + bDataFound = m_pHelper->move(IResultSetHelper::BOOKMARK, nBookmark, _bRetrieveData); + OSL_ENSURE((m_bDeletedVisible || !m_pHelper->isRowDeleted()),"A bookmark should not be deleted!"); + } + + + // and then move forward until we are after the last row + while(bDataFound) + { + bDataFound = m_pHelper->move(IResultSetHelper::NEXT, 1, false); // we don't need the data here + if( bDataFound && ( m_bDeletedVisible || !m_pHelper->isRowDeleted()) ) + { // we weren't on the last row we remember it and move on + m_aBookmarksPositions.push_back(m_pHelper->getDriverPos()); + //m_aBookmarksPositions.push_back(m_aBookmarks.emplace( m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first); + } + else if(!bDataFound && !m_aBookmarksPositions.empty() ) + { + // i already know the last bookmark :-) + // now we only have to repositioning us to the last row + nBookmark = (*m_aBookmarksPositions.rbegin())/*->first*/; + bDataFound = m_pHelper->move(IResultSetHelper::BOOKMARK, nBookmark, _bRetrieveData); + break; + } + } + return bDataFound; + } + else if (_eCursorPosition != IResultSetHelper::RELATIVE1) + { + bDataFound = m_pHelper->move(_eCursorPosition, _nOffset, _bRetrieveData); + bDone = bDataFound && (m_bDeletedVisible || !m_pHelper->isRowDeleted()); + } + else + { + bDataFound = m_pHelper->move(eDelPosition, 1, _bRetrieveData); + if (bDataFound && (m_bDeletedVisible || !m_pHelper->isRowDeleted())) + { + bDone = (--nDelOffset) == 0; + if ( !bDone ) + m_aBookmarksPositions.push_back(m_pHelper->getDriverPos()); + //m_aBookmarksPositions.push_back(m_aBookmarks.emplace( m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first); + } + else + bDone = false; + } + + while (bDataFound && !bDone) // Iterate until we are at the valid set + { + bDataFound = m_pHelper->move(eDelPosition, 1, _bRetrieveData); + if (_eCursorPosition != IResultSetHelper::RELATIVE1) + bDone = bDataFound && (m_bDeletedVisible || !m_pHelper->isRowDeleted()); + else if (bDataFound && (m_bDeletedVisible || !m_pHelper->isRowDeleted())) + { + bDone = (--nDelOffset) == 0; + if ( !bDone ) + m_aBookmarksPositions.push_back(m_pHelper->getDriverPos()); + //m_aBookmarksPositions.push_back(m_aBookmarks.emplace( m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first); + } + else + bDone = false; + } + + if(bDataFound && bDone) + { + const sal_Int32 nDriverPos = m_pHelper->getDriverPos(); + if ( m_bDeletedVisible ) + { + if ( nDriverPos > static_cast<sal_Int32>(m_aBookmarksPositions.size()) ) + m_aBookmarksPositions.push_back(nDriverPos); + } + else if ( std::find(m_aBookmarksPositions.begin(),m_aBookmarksPositions.end(),nDriverPos) == m_aBookmarksPositions.end() ) + m_aBookmarksPositions.push_back(nDriverPos); + /*sal_Int32 nDriverPos = m_pHelper->getDriverPos(); + if(m_aBookmarks.find(nDriverPos) == m_aBookmarks.end()) + m_aBookmarksPositions.push_back(m_aBookmarks.emplace( nDriverPos,m_aBookmarksPositions.size()+1)).first);*/ + } + + return bDataFound; +} + +bool OSkipDeletedSet::moveAbsolute(sal_Int32 _nPos,bool _bRetrieveData) +{ + bool bDataFound = false; + sal_Int32 nNewPos = _nPos; + if(nNewPos > 0) + { + if(static_cast<sal_Int32>(m_aBookmarksPositions.size()) < nNewPos) + { + // bookmark isn't known yet + // start at the last known position + sal_Int32 nCurPos = 0; + if ( m_aBookmarksPositions.empty() ) + { + bDataFound = m_pHelper->move(IResultSetHelper::FIRST, 0, _bRetrieveData ); + if(bDataFound && (m_bDeletedVisible || !m_pHelper->isRowDeleted())) + { + ++nCurPos; + m_aBookmarksPositions.push_back(m_pHelper->getDriverPos()); + //m_aBookmarksPositions.push_back(m_aBookmarks.emplace( m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first); + --nNewPos; + } + } // if ( m_aBookmarksPositions.empty() ) + else + { + sal_Int32 nLastBookmark = *m_aBookmarksPositions.rbegin()/*->first*/; + nCurPos = /*(**/m_aBookmarksPositions.size()/*->second*/; + nNewPos = nNewPos - nCurPos; + bDataFound = m_pHelper->move(IResultSetHelper::BOOKMARK, nLastBookmark, _bRetrieveData); + } + + // now move to that row we need and don't count deleted rows + while (bDataFound && nNewPos) + { + bDataFound = m_pHelper->move(IResultSetHelper::NEXT, 1, _bRetrieveData); + if(bDataFound && (m_bDeletedVisible || !m_pHelper->isRowDeleted())) + { + ++nCurPos; + m_aBookmarksPositions.push_back(m_pHelper->getDriverPos()); + //m_aBookmarksPositions.push_back(m_aBookmarks.emplace( m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first); + --nNewPos; + } + } + } + else + { + const sal_Int32 nBookmark = m_aBookmarksPositions[nNewPos-1]/*->first*/; + bDataFound = m_pHelper->move(IResultSetHelper::BOOKMARK,nBookmark, _bRetrieveData); + OSL_ENSURE((m_bDeletedVisible || !m_pHelper->isRowDeleted()),"moveAbsolute: row can't be deleted!"); + } + } + else + { + ++nNewPos; + bDataFound = skipDeleted(IResultSetHelper::LAST,0,nNewPos == 0); + + for(sal_Int32 i=nNewPos+1;bDataFound && i <= 0;++i) + bDataFound = skipDeleted(IResultSetHelper::PRIOR,1,i == 0); + + } + return bDataFound; +} + +void OSkipDeletedSet::clear() +{ + std::vector<sal_Int32>().swap(m_aBookmarksPositions); +} + +sal_Int32 OSkipDeletedSet::getMappedPosition(sal_Int32 _nPos) const +{ + std::vector<sal_Int32>::const_iterator aFind = std::find(m_aBookmarksPositions.begin(),m_aBookmarksPositions.end(),_nPos); + if ( aFind != m_aBookmarksPositions.end() ) + return (aFind - m_aBookmarksPositions.begin()) + 1; + OSL_FAIL("Why!"); + return -1; +} + +void OSkipDeletedSet::insertNewPosition(sal_Int32 _nPos) +{ + m_aBookmarksPositions.push_back(_nPos); +} + +void OSkipDeletedSet::deletePosition(sal_Int32 _nBookmark) +{ + std::vector<sal_Int32>::iterator aFind = std::find(m_aBookmarksPositions.begin(),m_aBookmarksPositions.end(),_nBookmark); + if ( aFind != m_aBookmarksPositions.end() ) + { + m_aBookmarksPositions.erase(aFind); + } +} + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |