xref: /aoo41x/main/connectivity/source/commontools/TSkipDeletedSet.cxx (revision 9b5730f6)

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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
 * "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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_connectivity.hxx"
#include "TSkipDeletedSet.hxx"
#include <osl/diagnose.h>
#include <rtl/logfile.hxx>

using namespace connectivity;
// -----------------------------------------------------------------------------
OSkipDeletedSet::OSkipDeletedSet(IResultSetHelper* _pHelper)
	: m_pHelper(_pHelper)
    ,m_bDeletedVisible(false)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "commontools", "Ocke.Janssen@sun.com", "OSkipDeletedSet::OSkipDeletedSet" );
    m_aBookmarksPositions.reserve(256);
}
// -----------------------------------------------------------------------------
OSkipDeletedSet::~OSkipDeletedSet()
{
	m_aBookmarksPositions.clear();
	//m_aBookmarks.clear();
}
// -----------------------------------------------------------------------------
sal_Bool OSkipDeletedSet::skipDeleted(IResultSetHelper::Movement _eCursorPosition, sal_Int32 _nOffset, sal_Bool _bRetrieveData)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "commontools", "Ocke.Janssen@sun.com", "OSkipDeletedSet::skipDeleted" );
	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::ABSOLUTE:
            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; // lsat row is invalid so position before
			nDelOffset = 1;
			break;
		case IResultSetHelper::RELATIVE:
			eDelPosition = (_nOffset >= 0) ? IResultSetHelper::NEXT : IResultSetHelper::PRIOR;
			break;
        default:
            break;
	}

	sal_Bool bDone			= sal_True;
	sal_Bool bDataFound		= sal_False;

	if (_eCursorPosition == IResultSetHelper::LAST)
	{
        RTL_LOGFILE_CONTEXT_TRACE( aLogger, "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.insert(TInt2IntMap::value_type(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 than move forward until we are after the last row
		while(bDataFound)
		{
			bDataFound = m_pHelper->move(IResultSetHelper::NEXT, 1, sal_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.insert(TInt2IntMap::value_type(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::RELATIVE)
	{
		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.insert(TInt2IntMap::value_type(m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first);
		}
		else
			bDone = sal_False;
	}

    while (bDataFound && !bDone)            // solange iterieren bis man auf einem gueltigen Satz ist
	{
		bDataFound = m_pHelper->move(eDelPosition, 1, _bRetrieveData);
		if (_eCursorPosition != IResultSetHelper::RELATIVE)
			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.insert(TInt2IntMap::value_type(m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first);
		}
		else
			bDone = sal_False;
	}

	if(bDataFound && bDone)
	{
        const sal_Int32 nDriverPos = m_pHelper->getDriverPos();
        if ( m_bDeletedVisible )
        {
            if ( nDriverPos > (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.insert(TInt2IntMap::value_type(nDriverPos,m_aBookmarksPositions.size()+1)).first);*/
	}

	return bDataFound;
}
// -------------------------------------------------------------------------
sal_Bool OSkipDeletedSet::moveAbsolute(sal_Int32 _nPos,sal_Bool _bRetrieveData)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "commontools", "Ocke.Janssen@sun.com", "OSkipDeletedSet::moveAbsolute" );
	sal_Bool bDataFound = sal_False;
	sal_Int32 nNewPos = _nPos;
	if(nNewPos > 0)
	{
		if((sal_Int32)m_aBookmarksPositions.size() < nNewPos)
		{
			// bookmark isn't known yet
			// start at the last known position
			sal_Int32 nCurPos = 0,nLastBookmark = 1;
			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.insert(TInt2IntMap::value_type(m_pHelper->getDriverPos(),m_aBookmarksPositions.size()+1)).first);
					--nNewPos;
				}
			} // if ( m_aBookmarksPositions.empty() )
            else
			{
				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.insert(TInt2IntMap::value_type(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()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "commontools", "Ocke.Janssen@sun.com", "OSkipDeletedSet::clear" );
	::std::vector<sal_Int32>().swap(m_aBookmarksPositions);
	//TInt2IntMap().swap(m_aBookmarks);
}
// -----------------------------------------------------------------------------
sal_Int32 OSkipDeletedSet::getMappedPosition(sal_Int32 _nPos) const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "commontools", "Ocke.Janssen@sun.com", "OSkipDeletedSet::getMappedPosition" );
    ::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;
	/*TInt2IntMap::const_iterator aFind = m_aBookmarks.find(_nPos);
	OSL_ENSURE(aFind != m_aBookmarks.end(),"OSkipDeletedSet::getMappedPosition() invalid bookmark!");
	return aFind->second;*/
    OSL_ENSURE(0,"Why!");
    return -1;
}
// -----------------------------------------------------------------------------
void OSkipDeletedSet::insertNewPosition(sal_Int32 _nPos)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "commontools", "Ocke.Janssen@sun.com", "OSkipDeletedSet::insertNewPosition" );
	//OSL_ENSURE(m_aBookmarks.find(_nPos) == m_aBookmarks.end(),"OSkipDeletedSet::insertNewPosition: Invalid position");
	//m_aBookmarksPositions.push_back(m_aBookmarks.insert(TInt2IntMap::value_type(_nPos,m_aBookmarksPositions.size()+1)).first);
    //OSL_ENSURE(::std::find(m_aBookmarksPositions.begin(),m_aBookmarksPositions.end(),_nPos) == m_aBookmarksPositions.end(),"Invalid driver pos");
    m_aBookmarksPositions.push_back(_nPos);
}
// -----------------------------------------------------------------------------
void OSkipDeletedSet::deletePosition(sal_Int32 _nBookmark)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "commontools", "Ocke.Janssen@sun.com", "OSkipDeletedSet::deletePosition" );
    ::std::vector<sal_Int32>::iterator aFind = ::std::find(m_aBookmarksPositions.begin(),m_aBookmarksPositions.end(),_nBookmark);
    if ( aFind !=  m_aBookmarksPositions.end() )
    {
	//TInt2IntMap::iterator aFind = m_aBookmarks.find(_nPos);
	//OSL_ENSURE(aFind != m_aBookmarks.end(),"OSkipDeletedSet::deletePosition() bookmark not found!");
	//TInt2IntMap::iterator aIter = aFind;
        m_aBookmarksPositions.erase(aFind);
	    //for (; aFind != m_aBookmarksPositions.end() ; ++aIter)
		   // --(aFind->second);
    } // if ( aFind !=  m_aBookmarksPositions.end() )
	//m_aBookmarksPositions.erase(m_aBookmarksPositions.begin() + aFind->second-1);
	//m_aBookmarks.erase(_nPos);
}
// -----------------------------------------------------------------------------