xref: /aoo41x/main/connectivity/source/drivers/dbase/DTable.cxx (revision 89f78bf2)

/**************************************************************
 *
 * 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
 *
 * 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
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_connectivity.hxx"
#include "dbase/DTable.hxx"
#include <com/sun/star/sdbc/ColumnValue.hpp>
#include <com/sun/star/sdbc/DataType.hpp>
#include <com/sun/star/ucb/XContentAccess.hpp>
#include <com/sun/star/sdbc/XRow.hpp>
#include <svl/converter.hxx>
#include "dbase/DConnection.hxx"
#include "dbase/DColumns.hxx"
#include <osl/thread.h>
#include <tools/config.hxx>
#include "dbase/DIndex.hxx"
#include "dbase/DIndexes.hxx"
//#include "file/FDriver.hxx"
#include <comphelper/sequence.hxx>
#include <svl/zforlist.hxx>
#include <unotools/syslocale.hxx>
#include <rtl/math.hxx>
#include <stdio.h>		//sprintf
#include <ucbhelper/content.hxx>
#include <comphelper/extract.hxx>
#include <connectivity/dbexception.hxx>
#include <connectivity/dbconversion.hxx>
#include <com/sun/star/lang/DisposedException.hpp>
#include <comphelper/property.hxx>
//#include <unotools/calendarwrapper.hxx>
#include <unotools/tempfile.hxx>
#include <unotools/ucbhelper.hxx>
#include <comphelper/types.hxx>
#include <cppuhelper/exc_hlp.hxx>
#include "connectivity/PColumn.hxx"
#include "connectivity/dbtools.hxx"
#include "connectivity/FValue.hxx"
#include "connectivity/dbconversion.hxx"
#include "resource/dbase_res.hrc"
#include <rtl/logfile.hxx>

#include <algorithm>

using namespace ::comphelper;
using namespace connectivity;
using namespace connectivity::sdbcx;
using namespace connectivity::dbase;
using namespace connectivity::file;
using namespace ::ucbhelper;
using namespace ::utl;
using namespace ::cppu;
using namespace ::dbtools;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::ucb;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::sdbcx;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::container;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::i18n;

// stored as the Field Descriptor terminator
#define FIELD_DESCRIPTOR_TERMINATOR 0x0D
#define DBF_EOL                     0x1A

namespace
{
sal_Int32 lcl_getFileSize(SvStream& _rStream)
{
    sal_Int32 nFileSize = 0;
    _rStream.Seek(STREAM_SEEK_TO_END);
    _rStream.SeekRel(-1);
    char cEOL;
    _rStream >> cEOL;
    nFileSize = _rStream.Tell();
    if ( cEOL == DBF_EOL )
        nFileSize -= 1;
    return nFileSize;
}
/**
	calculates the Julian date
*/
void lcl_CalcJulDate(sal_Int32& _nJulianDate,sal_Int32& _nJulianTime,const com::sun::star::util::DateTime _aDateTime)
{
    com::sun::star::util::DateTime aDateTime = _aDateTime;
	// weird: months fix
    if (aDateTime.Month > 12)
	{
	    aDateTime.Month--;
	    sal_uInt16 delta = _aDateTime.Month / 12;
	    aDateTime.Year += delta;
	    aDateTime.Month -= delta * 12;
	    aDateTime.Month++;
	}

	_nJulianTime = ((aDateTime.Hours*3600000)+(aDateTime.Minutes*60000)+(aDateTime.Seconds*1000)+(aDateTime.HundredthSeconds*10));
	/* conversion factors */
	sal_uInt16 iy0;
	sal_uInt16 im0;
	if ( aDateTime.Month <= 2 )
	{
		iy0 = aDateTime.Year - 1;
		im0 = aDateTime.Month + 12;
	}
	else
	{
		iy0 = aDateTime.Year;
		im0 = aDateTime.Month;
	}
	sal_Int32 ia = iy0 / 100;
	sal_Int32 ib = 2 - ia + (ia >> 2);
	/* calculate julian date	*/
	if ( aDateTime.Year <= 0 )
    {
		_nJulianDate = (sal_Int32) ((365.25 * iy0) - 0.75)
			+ (sal_Int32) (30.6001 * (im0 + 1) )
			+ aDateTime.Day + 1720994;
	} // if ( _aDateTime.Year <= 0 )
    else
    {
		_nJulianDate = static_cast<sal_Int32>( ((365.25 * iy0)
			+ (sal_Int32) (30.6001 * (im0 + 1))
			+ aDateTime.Day + 1720994));
	}
    double JD = _nJulianDate + 0.5;
    _nJulianDate = (sal_Int32)( JD + 0.5);
    const double gyr = aDateTime.Year + (0.01 * aDateTime.Month) + (0.0001 * aDateTime.Day);
	if ( gyr >= 1582.1015 )	/* on or after 15 October 1582	*/
		_nJulianDate += ib;
}

/**
	calculates date time from the Julian Date
*/
void lcl_CalDate(sal_Int32 _nJulianDate,sal_Int32 _nJulianTime,com::sun::star::util::DateTime& _rDateTime)
{
    if ( _nJulianDate )
    {
        sal_Int32 ialp;
	    sal_Int32 ka = _nJulianDate;
	    if ( _nJulianDate >= 2299161 )
	    {
		    ialp = (sal_Int32)( ((double) _nJulianDate - 1867216.25 ) / ( 36524.25 ));
		    ka = _nJulianDate + 1 + ialp - ( ialp >> 2 );
	    }
	    sal_Int32 kb = ka + 1524;
	    sal_Int32 kc =  (sal_Int32) ( ((double) kb - 122.1 ) / 365.25 );
	    sal_Int32 kd = (sal_Int32) ((double) kc * 365.25);
	    sal_Int32 ke = (sal_Int32) ((double) ( kb - kd ) / 30.6001 );
	    _rDateTime.Day = static_cast<sal_uInt16>(kb - kd - ((sal_Int32) ( (double) ke * 30.6001 )));
	    if ( ke > 13 )
		    _rDateTime.Month = static_cast<sal_uInt16>(ke - 13);
	    else
		    _rDateTime.Month = static_cast<sal_uInt16>(ke - 1);
	    if ( (_rDateTime.Month == 2) && (_rDateTime.Day > 28) )
		    _rDateTime.Day = 29;
	    if ( (_rDateTime.Month == 2) && (_rDateTime.Day == 29) && (ke == 3) )
		    _rDateTime.Year = static_cast<sal_uInt16>(kc - 4716);
	    else if ( _rDateTime.Month > 2 )
		    _rDateTime.Year = static_cast<sal_uInt16>(kc - 4716);
	    else
		    _rDateTime.Year = static_cast<sal_uInt16>(kc - 4715);
    } // if ( _nJulianDate )

    if ( _nJulianTime )
    {
        double d_s = _nJulianTime / 1000;
        double d_m = d_s / 60;
        double d_h  = d_m / 60;
        _rDateTime.Hours = (sal_uInt16) (d_h);
	    _rDateTime.Minutes = (sal_uInt16) d_m;			// integer _aDateTime.Minutes
	    //// weird: time fix
     //   int test = (_rDateTime.Hours % 3) * 100 + _rDateTime.Minutes;
	    //int test_tbl[] = {0, 1, 2, 11, 12, 13, 22, 23, 24, 25, 34, 35, 36,
	    //	45, 46, 47, 56, 57, 58, 107, 108, 109, 110, 119, 120, 121,
	    //	130, 131, 132, 141, 142, 143, 152, 153, 154, 155, 204, 205,
	    //	206, 215, 216, 217, 226, 227, 228, 237, 238, 239, 240, 249,
	    //	250, 251};
     //   for (int i = 0; i < sizeof(test_tbl)/sizeof(test_tbl[0]); i++)
	    //{
	    //    if (test == test_tbl[i])
	    //    {
	    //	// frac += 0.000012;
	    //	    //d_hour = frac * 24.0;
	    //	    _rDateTime.Hours = (sal_uInt16)d_hour;
	    //	    d_minute = (d_hour - (double)_rDateTime.Hours) * 60.0;
	    //	    _rDateTime.Minutes = (sal_uInt16)d_minute;
	    //	    break;
	    //    }
     //   }

	    _rDateTime.Seconds = static_cast<sal_uInt16>(( d_m - (double) _rDateTime.Minutes ) * 60.0);
    }
}

}

// -------------------------------------------------------------------------
void ODbaseTable::readHeader()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::readHeader" );
	OSL_ENSURE(m_pFileStream,"No Stream available!");
	if(!m_pFileStream)
		return;
	m_pFileStream->RefreshBuffer(); // sicherstellen, dass die Kopfinformationen tatsaechlich neu gelesen werden
	m_pFileStream->Seek(STREAM_SEEK_TO_BEGIN);

	sal_uInt8 nType=0;
	(*m_pFileStream) >> nType;
	if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
		throwInvalidDbaseFormat();

	m_pFileStream->Read((char*)(&m_aHeader.db_aedat), 3*sizeof(sal_uInt8));
	if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
		throwInvalidDbaseFormat();
	(*m_pFileStream) >> m_aHeader.db_anz;
	if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
		throwInvalidDbaseFormat();
	(*m_pFileStream) >> m_aHeader.db_kopf;
	if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
		throwInvalidDbaseFormat();
	(*m_pFileStream) >> m_aHeader.db_slng;
	if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
		throwInvalidDbaseFormat();
	m_pFileStream->Read((char*)(&m_aHeader.db_frei), 20*sizeof(sal_uInt8));
	if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
		throwInvalidDbaseFormat();

    if ( ( ( m_aHeader.db_kopf - 1 ) / 32 - 1 ) <= 0 ) // anzahl felder
	{
		// no dbase file
		throwInvalidDbaseFormat();
	}
	else
	{
		// Konsistenzpruefung des Header:
		m_aHeader.db_typ = (DBFType)nType;
		switch (m_aHeader.db_typ)
		{
			case dBaseIII:
			case dBaseIV:
			case dBaseV:
            case VisualFoxPro:
            case VisualFoxProAuto:
			case dBaseFS:
			case dBaseFSMemo:
			case dBaseIVMemoSQL:
			case dBaseIIIMemo:
			case FoxProMemo:
				m_pFileStream->SetNumberFormatInt(NUMBERFORMAT_INT_LITTLEENDIAN);
                if ( m_aHeader.db_frei[17] != 0x00
                    && !m_aHeader.db_frei[18] && !m_aHeader.db_frei[19] && getConnection()->isTextEncodingDefaulted() )
                {
                    switch(m_aHeader.db_frei[17])
                    {
                        case 0x01: m_eEncoding = RTL_TEXTENCODING_IBM_437; break; 	    // DOS USA	code page 437
                        case 0x02: m_eEncoding = RTL_TEXTENCODING_IBM_850; break; 	    // DOS Multilingual	code page 850
                        case 0x03: m_eEncoding = RTL_TEXTENCODING_MS_1252; break; 	    // Windows ANSI	code page 1252
                        case 0x04: m_eEncoding = RTL_TEXTENCODING_APPLE_ROMAN; break; 	// Standard Macintosh
                        case 0x64: m_eEncoding = RTL_TEXTENCODING_IBM_852; break; 	    // EE MS-DOS	code page 852
                        case 0x65: m_eEncoding = RTL_TEXTENCODING_IBM_865; break; 	    // Nordic MS-DOS	code page 865
                        case 0x66: m_eEncoding = RTL_TEXTENCODING_IBM_866; break; 	    // Russian MS-DOS	code page 866
                        case 0x67: m_eEncoding = RTL_TEXTENCODING_IBM_861; break; 	    // Icelandic MS-DOS
                        //case 0x68: m_eEncoding = ; break; 	// Kamenicky (Czech) MS-DOS
                        //case 0x69: m_eEncoding = ; break; 	// Mazovia (Polish) MS-DOS
                        case 0x6A: m_eEncoding = RTL_TEXTENCODING_IBM_737; break; 	    // Greek MS-DOS (437G)
                        case 0x6B: m_eEncoding = RTL_TEXTENCODING_IBM_857; break; 	    // Turkish MS-DOS
                        case 0x96: m_eEncoding = RTL_TEXTENCODING_APPLE_CYRILLIC; break; 	// Russian Macintosh
                        case 0x97: m_eEncoding = RTL_TEXTENCODING_APPLE_CENTEURO; break; 	// Eastern European Macintosh
                        case 0x98: m_eEncoding = RTL_TEXTENCODING_APPLE_GREEK; break; 	// Greek Macintosh
                        case 0xC8: m_eEncoding = RTL_TEXTENCODING_MS_1250; break; 	    // Windows EE	code page 1250
                        case 0xC9: m_eEncoding = RTL_TEXTENCODING_MS_1251; break; 	    // Russian Windows
                        case 0xCA: m_eEncoding = RTL_TEXTENCODING_MS_1254; break; 	    // Turkish Windows
                        case 0xCB: m_eEncoding = RTL_TEXTENCODING_MS_1253; break; 	    // Greek Windows
                        default:
                            break;
                    }
                }
				break;
            case dBaseIVMemo:
                m_pFileStream->SetNumberFormatInt(NUMBERFORMAT_INT_LITTLEENDIAN);
                break;
			default:
			{
				throwInvalidDbaseFormat();
			}
		}
	}
}
// -------------------------------------------------------------------------
void ODbaseTable::fillColumns()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::fillColumns" );
	m_pFileStream->Seek(STREAM_SEEK_TO_BEGIN);
	m_pFileStream->Seek(32L);

	if(!m_aColumns.isValid())
		m_aColumns = new OSQLColumns();
	else
		m_aColumns->get().clear();

	m_aTypes.clear();
	m_aPrecisions.clear();
	m_aScales.clear();

	// Anzahl Felder:
	const sal_Int32 nFieldCount = (m_aHeader.db_kopf - 1) / 32 - 1;
	OSL_ENSURE(nFieldCount,"No columns in table!");

	m_aColumns->get().reserve(nFieldCount);
	m_aTypes.reserve(nFieldCount);
	m_aPrecisions.reserve(nFieldCount);
	m_aScales.reserve(nFieldCount);

	String aStrFieldName;
	aStrFieldName.AssignAscii("Column");
	::rtl::OUString aTypeName;
    static const ::rtl::OUString sVARCHAR(RTL_CONSTASCII_USTRINGPARAM("VARCHAR"));
	const sal_Bool bCase = getConnection()->getMetaData()->supportsMixedCaseQuotedIdentifiers();
    const bool bFoxPro = m_aHeader.db_typ == VisualFoxPro || m_aHeader.db_typ == VisualFoxProAuto || m_aHeader.db_typ == FoxProMemo;

    sal_Int32 i = 0;
	for (; i < nFieldCount; i++)
	{
		DBFColumn aDBFColumn;
		m_pFileStream->Read((char*)&aDBFColumn, sizeof(aDBFColumn));
        if ( FIELD_DESCRIPTOR_TERMINATOR == aDBFColumn.db_fnm[0] ) // 0x0D stored as the Field Descriptor terminator.
            break;

        sal_Bool bIsRowVersion = bFoxPro && ( aDBFColumn.db_frei2[0] & 0x01 ) == 0x01;
        //if ( bFoxPro && ( aDBFColumn.db_frei2[0] & 0x01 ) == 0x01 ) // system column not visible to user
        //    continue;
		const String aColumnName((const char *)aDBFColumn.db_fnm,m_eEncoding);

        m_aRealFieldLengths.push_back(aDBFColumn.db_flng);
		sal_Int32 nPrecision = aDBFColumn.db_flng;
		sal_Int32 eType;
        sal_Bool bIsCurrency = sal_False;

        char cType[2];
        cType[0] = aDBFColumn.db_typ;
        cType[1] = 0;
        aTypeName = ::rtl::OUString::createFromAscii(cType);
OSL_TRACE("column type: %c",aDBFColumn.db_typ);

		switch (aDBFColumn.db_typ)
		{
			case 'C':
				eType = DataType::VARCHAR;
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("VARCHAR"));
				break;
			case 'F':
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("DECIMAL"));
			case 'N':
                if ( aDBFColumn.db_typ == 'N' )
                    aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("NUMERIC"));
				eType = DataType::DECIMAL;

				// Bei numerischen Feldern werden zwei Zeichen mehr geschrieben, als die Precision der Spaltenbeschreibung eigentlich
				// angibt, um Platz fuer das eventuelle Vorzeichen und das Komma zu haben. Das muss ich jetzt aber wieder rausrechnen.
				nPrecision = SvDbaseConverter::ConvertPrecisionToOdbc(nPrecision,aDBFColumn.db_dez);
					// leider gilt das eben Gesagte nicht fuer aeltere Versionen ....
				break;
			case 'L':
				eType = DataType::BIT;
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("BOOLEAN"));
				break;
            case 'Y':
                bIsCurrency = sal_True;
				eType = DataType::DOUBLE;
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("DOUBLE"));
				break;
			case 'D':
				eType = DataType::DATE;
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("DATE"));
				break;
            case 'T':
				eType = DataType::TIMESTAMP;
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("TIMESTAMP"));
				break;
            case 'I':
				eType = DataType::INTEGER;
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("INTEGER"));
				break;
			case 'M':
                if ( bFoxPro && ( aDBFColumn.db_frei2[0] & 0x04 ) == 0x04 )
                {
				    eType = DataType::LONGVARBINARY;
                    aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("LONGVARBINARY"));
                }
                else
                {
                    aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("LONGVARCHAR"));
                    eType = DataType::LONGVARCHAR;
                }
				nPrecision = 2147483647;
				break;
            case 'P':
                aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("LONGVARBINARY"));
				eType = DataType::LONGVARBINARY;
				nPrecision = 2147483647;
				break;
            case '0':
            case 'B':
                if ( m_aHeader.db_typ == VisualFoxPro || m_aHeader.db_typ == VisualFoxProAuto )
                {
                    aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("DOUBLE"));
                    eType = DataType::DOUBLE;
                }
                else
                {
                    aTypeName = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("LONGVARBINARY"));
                    eType = DataType::LONGVARBINARY;
				    nPrecision = 2147483647;
                }
				break;
			default:
				eType = DataType::OTHER;
		}

		m_aTypes.push_back(eType);
		m_aPrecisions.push_back(nPrecision);
		m_aScales.push_back(aDBFColumn.db_dez);

		Reference< XPropertySet> xCol = new sdbcx::OColumn(aColumnName,
													aTypeName,
													::rtl::OUString(),
                                                    ::rtl::OUString(),
													ColumnValue::NULLABLE,
													nPrecision,
													aDBFColumn.db_dez,
													eType,
													sal_False,
													bIsRowVersion,
													bIsCurrency,
													bCase);
		m_aColumns->get().push_back(xCol);
	} // for (; i < nFieldCount; i++)
    OSL_ENSURE(i,"No columns in table!");
}
// -------------------------------------------------------------------------
ODbaseTable::ODbaseTable(sdbcx::OCollection* _pTables,ODbaseConnection* _pConnection)
		:ODbaseTable_BASE(_pTables,_pConnection)
		,m_pMemoStream(NULL)
		,m_bWriteableMemo(sal_False)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::ODbaseTable" );
	// initialize the header
	m_aHeader.db_typ	= dBaseIII;
	m_aHeader.db_anz	= 0;
	m_aHeader.db_kopf	= 0;
	m_aHeader.db_slng	= 0;
    m_eEncoding = getConnection()->getTextEncoding();
}
// -------------------------------------------------------------------------
ODbaseTable::ODbaseTable(sdbcx::OCollection* _pTables,ODbaseConnection* _pConnection,
					const ::rtl::OUString& _Name,
					const ::rtl::OUString& _Type,
					const ::rtl::OUString& _Description ,
					const ::rtl::OUString& _SchemaName,
					const ::rtl::OUString& _CatalogName
				) : ODbaseTable_BASE(_pTables,_pConnection,_Name,
								  _Type,
								  _Description,
								  _SchemaName,
								  _CatalogName)
				,m_pMemoStream(NULL)
				,m_bWriteableMemo(sal_False)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::ODbaseTable" );
    m_eEncoding = getConnection()->getTextEncoding();
}

// -----------------------------------------------------------------------------
void ODbaseTable::construct()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::construct" );
	// initialize the header
	m_aHeader.db_typ	= dBaseIII;
	m_aHeader.db_anz	= 0;
	m_aHeader.db_kopf	= 0;
	m_aHeader.db_slng	= 0;
    m_aMemoHeader.db_size = 0;

	String sFileName(getEntry(m_pConnection,m_Name));

	INetURLObject aURL;
	aURL.SetURL(sFileName);

	OSL_ENSURE( m_pConnection->matchesExtension( aURL.getExtension() ),
		"ODbaseTable::ODbaseTable: invalid extension!");
		// getEntry is expected to ensure the corect file name

	m_pFileStream = createStream_simpleError( sFileName, STREAM_READWRITE | STREAM_NOCREATE | STREAM_SHARE_DENYWRITE);
	m_bWriteable = ( m_pFileStream != NULL );

    if ( !m_pFileStream )
    {
        m_bWriteable = sal_False;
		m_pFileStream = createStream_simpleError( sFileName, STREAM_READ | STREAM_NOCREATE | STREAM_SHARE_DENYNONE);
    }

	if(m_pFileStream)
	{
		readHeader();
		if (HasMemoFields())
		{
			// Memo-Dateinamen bilden (.DBT):
			// nyi: Unschoen fuer Unix und Mac!

			if ( m_aHeader.db_typ == FoxProMemo || VisualFoxPro == m_aHeader.db_typ || VisualFoxProAuto == m_aHeader.db_typ ) // foxpro uses another extension
				aURL.SetExtension(String::CreateFromAscii("fpt"));
			else
				aURL.SetExtension(String::CreateFromAscii("dbt"));

			// Wenn die Memodatei nicht gefunden wird, werden die Daten trotzdem angezeigt
			// allerdings koennen keine Updates durchgefuehrt werden
			// jedoch die Operation wird ausgefuehrt
			m_pMemoStream = createStream_simpleError( aURL.GetMainURL(INetURLObject::NO_DECODE), STREAM_READWRITE | STREAM_NOCREATE | STREAM_SHARE_DENYWRITE);
            if ( !m_pMemoStream )
            {
                m_bWriteableMemo = sal_False;
				m_pMemoStream = createStream_simpleError( aURL.GetMainURL(INetURLObject::NO_DECODE), STREAM_READ | STREAM_NOCREATE | STREAM_SHARE_DENYNONE);
            }
			if (m_pMemoStream)
				ReadMemoHeader();
		}
		//	if(!m_pColumns && (!m_aColumns.isValid() || !m_aColumns->size()))
		fillColumns();

		sal_uInt32 nFileSize = lcl_getFileSize(*m_pFileStream);
		m_pFileStream->Seek(STREAM_SEEK_TO_BEGIN);
        if ( m_aHeader.db_anz == 0 && ((nFileSize-m_aHeader.db_kopf)/m_aHeader.db_slng) > 0) // seems to be empty or someone wrote bullshit into the dbase file
            m_aHeader.db_anz = ((nFileSize-m_aHeader.db_kopf)/m_aHeader.db_slng);

		// Buffersize abhaengig von der Filegroesse
		m_pFileStream->SetBufferSize(nFileSize > 1000000 ? 32768 :
								  nFileSize > 100000 ? 16384 :
								  nFileSize > 10000 ? 4096 : 1024);

		if (m_pMemoStream)
		{
			// Puffer genau auf Laenge eines Satzes stellen
			m_pMemoStream->Seek(STREAM_SEEK_TO_END);
			nFileSize = m_pMemoStream->Tell();
			m_pMemoStream->Seek(STREAM_SEEK_TO_BEGIN);

			// Buffersize abhaengig von der Filegroesse
			m_pMemoStream->SetBufferSize(nFileSize > 1000000 ? 32768 :
										  nFileSize > 100000 ? 16384 :
										  nFileSize > 10000 ? 4096 :
										  m_aMemoHeader.db_size);
		}

		AllocBuffer();
	}
}
//------------------------------------------------------------------
sal_Bool ODbaseTable::ReadMemoHeader()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::ReadMemoHeader" );
	m_pMemoStream->SetNumberFormatInt(NUMBERFORMAT_INT_LITTLEENDIAN);
	m_pMemoStream->RefreshBuffer();			// sicherstellen das die Kopfinformationen tatsaechlich neu gelesen werden
	m_pMemoStream->Seek(0L);

	(*m_pMemoStream) >> m_aMemoHeader.db_next;
	switch (m_aHeader.db_typ)
	{
        case dBaseIIIMemo:  // dBase III: feste Blockgroesse
		case dBaseIVMemo:
			// manchmal wird aber auch dBase3 dBase4 Memo zugeordnet
			m_pMemoStream->Seek(20L);
			(*m_pMemoStream) >> m_aMemoHeader.db_size;
			if (m_aMemoHeader.db_size > 1 && m_aMemoHeader.db_size != 512)	// 1 steht auch fuer dBase 3
				m_aMemoHeader.db_typ  = MemodBaseIV;
			else if (m_aMemoHeader.db_size > 1 && m_aMemoHeader.db_size == 512)
			{
                // nun gibt es noch manche Dateien, die verwenden eine Groessenangabe,
				// sind aber dennoch dBase Dateien
				char sHeader[4];
				m_pMemoStream->Seek(m_aMemoHeader.db_size);
				m_pMemoStream->Read(sHeader,4);

				if ((m_pMemoStream->GetErrorCode() != ERRCODE_NONE) || ((sal_uInt8)sHeader[0]) != 0xFF || ((sal_uInt8)sHeader[1]) != 0xFF || ((sal_uInt8)sHeader[2]) != 0x08)
					m_aMemoHeader.db_typ  = MemodBaseIII;
				else
					m_aMemoHeader.db_typ  = MemodBaseIV;
			}
			else
			{
				m_aMemoHeader.db_typ  = MemodBaseIII;
				m_aMemoHeader.db_size = 512;
			}
			break;
        case VisualFoxPro:
        case VisualFoxProAuto:
		case FoxProMemo:
			m_aMemoHeader.db_typ	= MemoFoxPro;
			m_pMemoStream->Seek(6L);
			m_pMemoStream->SetNumberFormatInt(NUMBERFORMAT_INT_BIGENDIAN);
			(*m_pMemoStream) >> m_aMemoHeader.db_size;
            break;
        default:
            OSL_ENSURE( false, "ODbaseTable::ReadMemoHeader: unsupported memo type!" );
            break;
	}
	return sal_True;
}
// -------------------------------------------------------------------------
String ODbaseTable::getEntry(OConnection* _pConnection,const ::rtl::OUString& _sName )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::getEntry" );
	::rtl::OUString sURL;
	try
	{
		Reference< XResultSet > xDir = _pConnection->getDir()->getStaticResultSet();
		Reference< XRow> xRow(xDir,UNO_QUERY);
		::rtl::OUString sName;
		::rtl::OUString sExt;
		INetURLObject aURL;
		static const ::rtl::OUString s_sSeparator(RTL_CONSTASCII_USTRINGPARAM("/"));
		xDir->beforeFirst();
		while(xDir->next())
		{
			sName = xRow->getString(1);
			aURL.SetSmartProtocol(INET_PROT_FILE);
			String sUrl = _pConnection->getURL() +  s_sSeparator + sName;
			aURL.SetSmartURL( sUrl );

			// cut the extension
			sExt = aURL.getExtension();

			// name and extension have to coincide
			if ( _pConnection->matchesExtension( sExt ) )
			{
				sName = sName.replaceAt(sName.getLength()-(sExt.getLength()+1),sExt.getLength()+1,::rtl::OUString());
				if ( sName == _sName )
				{
					Reference< XContentAccess > xContentAccess( xDir, UNO_QUERY );
					sURL = xContentAccess->queryContentIdentifierString();
					break;
				}
			}
		}
		xDir->beforeFirst(); // move back to before first record
	}
	catch(Exception&)
	{
		OSL_ASSERT(0);
	}
	return sURL;
}
// -------------------------------------------------------------------------
void ODbaseTable::refreshColumns()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::refreshColumns" );
	::osl::MutexGuard aGuard( m_aMutex );

	TStringVector aVector;
	aVector.reserve(m_aColumns->get().size());

	for(OSQLColumns::Vector::const_iterator aIter = m_aColumns->get().begin();aIter != m_aColumns->get().end();++aIter)
		aVector.push_back(Reference< XNamed>(*aIter,UNO_QUERY)->getName());

	if(m_pColumns)
		m_pColumns->reFill(aVector);
	else
		m_pColumns	= new ODbaseColumns(this,m_aMutex,aVector);
}
// -------------------------------------------------------------------------
void ODbaseTable::refreshIndexes()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::refreshIndexes" );
	TStringVector aVector;
	if(m_pFileStream && (!m_pIndexes || m_pIndexes->getCount() == 0))
	{
		INetURLObject aURL;
		aURL.SetURL(getEntry(m_pConnection,m_Name));

		aURL.setExtension(String::CreateFromAscii("inf"));
		Config aInfFile(aURL.getFSysPath(INetURLObject::FSYS_DETECT));
		aInfFile.SetGroup(dBASE_III_GROUP);
		sal_uInt16 nKeyCnt = aInfFile.GetKeyCount();
		ByteString aKeyName;
		ByteString aIndexName;

		for (sal_uInt16 nKey = 0; nKey < nKeyCnt; nKey++)
		{
			// Verweist der Key auf ein Indexfile?...
			aKeyName = aInfFile.GetKeyName( nKey );
			//...wenn ja, Indexliste der Tabelle hinzufuegen
			if (aKeyName.Copy(0,3) == ByteString("NDX") )
			{
				aIndexName = aInfFile.ReadKey(aKeyName);
				aURL.setName(String(aIndexName,m_eEncoding));
				try
				{
					Content aCnt(aURL.GetMainURL(INetURLObject::NO_DECODE),Reference<XCommandEnvironment>());
					if (aCnt.isDocument())
					{
						aVector.push_back(aURL.getBase());
					}
				}
				catch(Exception&) // a execption is thrown when no file exists
				{
				}
			}
		}
	}
	if(m_pIndexes)
		m_pIndexes->reFill(aVector);
	else
		m_pIndexes	= new ODbaseIndexes(this,m_aMutex,aVector);
}

// -------------------------------------------------------------------------
void SAL_CALL ODbaseTable::disposing(void)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::disposing" );
	OFileTable::disposing();
	::osl::MutexGuard aGuard(m_aMutex);
	m_aColumns = NULL;
}
// -------------------------------------------------------------------------
Sequence< Type > SAL_CALL ODbaseTable::getTypes(  ) throw(RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::getTypes" );
	Sequence< Type > aTypes = OTable_TYPEDEF::getTypes();
	::std::vector<Type> aOwnTypes;
	aOwnTypes.reserve(aTypes.getLength());

	const Type* pBegin = aTypes.getConstArray();
	const Type* pEnd = pBegin + aTypes.getLength();
	for(;pBegin != pEnd;++pBegin)
	{
		if(!(*pBegin == ::getCppuType((const Reference<XKeysSupplier>*)0)	||
			//	*pBegin == ::getCppuType((const Reference<XAlterTable>*)0)	||
			*pBegin == ::getCppuType((const Reference<XDataDescriptorFactory>*)0)))
		{
			aOwnTypes.push_back(*pBegin);
		}
	}
	aOwnTypes.push_back(::getCppuType( (const Reference< ::com::sun::star::lang::XUnoTunnel > *)0 ));
	Type *pTypes = aOwnTypes.empty() ? 0 : &aOwnTypes[0];
	return Sequence< Type >(pTypes, aOwnTypes.size());
}

// -------------------------------------------------------------------------
Any SAL_CALL ODbaseTable::queryInterface( const Type & rType ) throw(RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::queryInterface" );
	if( rType == ::getCppuType((const Reference<XKeysSupplier>*)0)	||
		rType == ::getCppuType((const Reference<XDataDescriptorFactory>*)0))
		return Any();

	Any aRet = OTable_TYPEDEF::queryInterface(rType);
	return aRet.hasValue() ? aRet : ::cppu::queryInterface(rType,static_cast< ::com::sun::star::lang::XUnoTunnel*> (this));
}

//--------------------------------------------------------------------------
Sequence< sal_Int8 > ODbaseTable::getUnoTunnelImplementationId()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::getUnoTunnelImplementationId" );
	static ::cppu::OImplementationId * pId = 0;
	if (! pId)
	{
		::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
		if (! pId)
		{
			static ::cppu::OImplementationId aId;
			pId = &aId;
		}
	}
	return pId->getImplementationId();
}

// com::sun::star::lang::XUnoTunnel
//------------------------------------------------------------------
sal_Int64 ODbaseTable::getSomething( const Sequence< sal_Int8 > & rId ) throw (RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::getSomething" );
	return (rId.getLength() == 16 && 0 == rtl_compareMemory(getUnoTunnelImplementationId().getConstArray(),  rId.getConstArray(), 16 ) )
				? reinterpret_cast< sal_Int64 >( this )
				: ODbaseTable_BASE::getSomething(rId);
}
//------------------------------------------------------------------
sal_Bool ODbaseTable::fetchRow(OValueRefRow& _rRow,const OSQLColumns & _rCols, sal_Bool _bUseTableDefs,sal_Bool bRetrieveData)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::fetchRow" );
	// Einlesen der Daten
	sal_Bool bIsCurRecordDeleted = ((char)m_pBuffer[0] == '*') ? sal_True : sal_False;

	// only read the bookmark

	// Satz als geloescht markieren
	//	rRow.setState(bIsCurRecordDeleted ? ROW_DELETED : ROW_CLEAN );
	_rRow->setDeleted(bIsCurRecordDeleted);
	*(_rRow->get())[0] = m_nFilePos;

	if (!bRetrieveData)
		return sal_True;

	sal_Size nByteOffset = 1;
	// Felder:
	OSQLColumns::Vector::const_iterator aIter = _rCols.get().begin();
    OSQLColumns::Vector::const_iterator aEnd  = _rCols.get().end();
    const sal_Size nCount = _rRow->get().size();
	for (sal_Size i = 1; aIter != aEnd && nByteOffset <= m_nBufferSize && i < nCount;++aIter, i++)
	{
		// Laengen je nach Datentyp:
		sal_Int32 nLen = 0;
		sal_Int32 nType = 0;
		if(_bUseTableDefs)
		{
			nLen	= m_aPrecisions[i-1];
			nType	= m_aTypes[i-1];
		}
		else
		{
			(*aIter)->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_PRECISION))	>>= nLen;
			(*aIter)->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE))		>>= nType;
		}
		switch(nType)
		{
            case DataType::INTEGER:
            case DataType::DOUBLE:
            case DataType::TIMESTAMP:
			case DataType::DATE:
            case DataType::BIT:
			case DataType::LONGVARCHAR:
            case DataType::LONGVARBINARY:
                nLen = m_aRealFieldLengths[i-1];
                break;
			case DataType::DECIMAL:
				if(_bUseTableDefs)
					nLen = SvDbaseConverter::ConvertPrecisionToDbase(nLen,m_aScales[i-1]);
				else
					nLen = SvDbaseConverter::ConvertPrecisionToDbase(nLen,getINT32((*aIter)->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_SCALE))));
				break;	// das Vorzeichen und das Komma

            case DataType::BINARY:
			case DataType::OTHER:
				nByteOffset += nLen;
				continue;
		}

		// Ist die Variable ueberhaupt gebunden?
		if ( !(_rRow->get())[i]->isBound() )
		{
			// Nein - naechstes Feld.
			nByteOffset += nLen;
			OSL_ENSURE( nByteOffset <= m_nBufferSize ,"ByteOffset > m_nBufferSize!");
			continue;
		} // if ( !(_rRow->get())[i]->isBound() )
        if ( ( nByteOffset + nLen) > m_nBufferSize )
            break; // length doesn't match buffer size.

		char *pData = (char *) (m_pBuffer + nByteOffset);

		//	(*_rRow)[i].setType(nType);

		if (nType == DataType::CHAR || nType == DataType::VARCHAR)
		{
			char cLast = pData[nLen];
			pData[nLen] = 0;
			String aStr(pData,(xub_StrLen)nLen,m_eEncoding);
			aStr.EraseTrailingChars();

			if ( aStr.Len() )
                *(_rRow->get())[i] = ::rtl::OUString(aStr);
			else// keine StringLaenge, dann NULL
                (_rRow->get())[i]->setNull();

			pData[nLen] = cLast;
		} // if (nType == DataType::CHAR || nType == DataType::VARCHAR)
        else if ( DataType::TIMESTAMP == nType )
        {
            sal_Int32 nDate = 0,nTime = 0;
            OSL_ENSURE(nLen == 8, "Invalid length for date field");
            if (nLen >= 8) {
                memcpy(&nDate, pData, 4);
                memcpy(&nTime, pData+ 4, 4);
            }
            if ( !nDate && !nTime )
            {
                (_rRow->get())[i]->setNull();
            }
            else
            {
                ::com::sun::star::util::DateTime aDateTime;
                lcl_CalDate(nDate,nTime,aDateTime);
                *(_rRow->get())[i] = aDateTime;
            }
        }
        else if ( DataType::INTEGER == nType )
        {
            OSL_ENSURE(nLen == 4, "Invalid length for integer field");
            if (nLen >= 4) {
                sal_Int32 nValue = 0;
                memcpy(&nValue, pData, 4);
                *(_rRow->get())[i] = nValue;
            } else {
                (_rRow->get())[i]->setNull();
            }
        }
        else if ( DataType::DOUBLE == nType )
        {
            double d = 0.0;
            OSL_ENSURE(nLen == 8, "Invalid length for double field");
            if (nLen >= 8) {
                if (getBOOL((*aIter)->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_ISCURRENCY)))) // Currency needs special treatment
                    {
                        sal_Int64 nValue = 0;
                        memcpy(&nValue, pData, nLen);

                        if ( m_aScales[i-1] )
                            d = (double)(nValue / pow(10.0,(int)m_aScales[i-1]));
                        else
                            d = (double)(nValue);
                    }
                else
                    {
                        memcpy(&d, pData, nLen);
                    }

                *(_rRow->get())[i] = d;
            } else {
                (_rRow->get())[i]->setNull();
            }
        }
		else
		{
			// Change any nulls into spaces
			for (sal_Int32 k = 0; k < nLen; k++)
			{
				if (pData[k] == '\0')
					pData[k] = ' ';
			}

			String aStr(pData, (xub_StrLen)nLen,m_eEncoding);		// Strip spaces from beginning and end
			aStr.EraseLeadingChars();
			aStr.EraseTrailingChars();

			if (!aStr.Len())
			{
				nByteOffset += nLen;
				(_rRow->get())[i]->setNull();	// no value -> we are done
				continue;
			}

			switch (nType)
			{
				case DataType::DATE:
				{
                    OSL_ENSURE(nLen == 8, "Invalid length for date field");
					if ((nLen < 8) || (aStr.Len() != nLen)) {
						(_rRow->get())[i]->setNull();
						break;
					}
					const sal_uInt16  nYear   = (sal_uInt16)aStr.Copy( 0, 4 ).ToInt32();
					const sal_uInt16  nMonth  = (sal_uInt16)aStr.Copy( 4, 2 ).ToInt32();
					const sal_uInt16  nDay    = (sal_uInt16)aStr.Copy( 6, 2 ).ToInt32();

					const ::com::sun::star::util::Date aDate(nDay,nMonth,nYear);
					*(_rRow->get())[i] = aDate;
				}
				break;
				case DataType::DECIMAL:
					*(_rRow->get())[i] = ORowSetValue(aStr);
					//	pVal->setDouble(SdbTools::ToDouble(aStr));
				break;
				case DataType::BIT:
				{
                    OSL_ENSURE(nLen == 1, "Invalid length for bit field");
                    if (nLen < 1) {
						(_rRow->get())[i]->setNull();
						break;
                    }
					sal_Bool b;
					switch (* ((const char *)pData))
					{
						case 'T':
						case 'Y':
						case 'J':	b = sal_True; break;
						default: 	b = sal_False; break;
					}
					*(_rRow->get())[i] = b;
					//	pVal->setDouble(b);
				}
				break;
                case DataType::LONGVARBINARY:
                case DataType::BINARY:
				case DataType::LONGVARCHAR:
				{
					const long nBlockNo = aStr.ToInt32();	// Blocknummer lesen
					if (nBlockNo > 0 && m_pMemoStream) // Daten aus Memo-Datei lesen, nur wenn
					{
						if ( !ReadMemo(nBlockNo, (_rRow->get())[i]->get()) )
							break;
					}
					else
						(_rRow->get())[i]->setNull();
				}	break;
				default:
					OSL_ASSERT("Wrong type");
			}
			(_rRow->get())[i]->setTypeKind(nType);
		}

		nByteOffset += nLen;
		OSL_ENSURE( nByteOffset <= m_nBufferSize ,"ByteOffset > m_nBufferSize!");
	}
	return sal_True;
}
//------------------------------------------------------------------
// -------------------------------------------------------------------------
void ODbaseTable::FileClose()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::FileClose" );
	::osl::MutexGuard aGuard(m_aMutex);
	// falls noch nicht alles geschrieben wurde
	if (m_pMemoStream && m_pMemoStream->IsWritable())
		m_pMemoStream->Flush();

	delete m_pMemoStream;
	m_pMemoStream = NULL;

	ODbaseTable_BASE::FileClose();
}
// -------------------------------------------------------------------------
sal_Bool ODbaseTable::CreateImpl()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::CreateImpl" );
	OSL_ENSURE(!m_pFileStream, "SequenceError");

	if ( m_pConnection->isCheckEnabled() && ::dbtools::convertName2SQLName(m_Name,::rtl::OUString()) != m_Name )
	{
        const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                STR_SQL_NAME_ERROR,
                "$name$", m_Name
             ) );
        ::dbtools::throwGenericSQLException( sError, *this );
	}

	INetURLObject aURL;
	aURL.SetSmartProtocol(INET_PROT_FILE);
	String aName = getEntry(m_pConnection,m_Name);
	if(!aName.Len())
	{
		::rtl::OUString aIdent = m_pConnection->getContent()->getIdentifier()->getContentIdentifier();
		if ( aIdent.lastIndexOf('/') != (aIdent.getLength()-1) )
			aIdent += ::rtl::OUString::createFromAscii("/");
		aIdent += m_Name;
		aName = aIdent.getStr();
	}
	aURL.SetURL(aName);

	if ( !m_pConnection->matchesExtension( aURL.getExtension() ) )
		aURL.setExtension(m_pConnection->getExtension());

	try
	{
		Content aContent(aURL.GetMainURL(INetURLObject::NO_DECODE),Reference<XCommandEnvironment>());
		if (aContent.isDocument())
		{
			// Hack fuer Bug #30609 , nur wenn das File existiert und die Laenge > 0 gibt es einen Fehler
			SvStream* pFileStream = createStream_simpleError( aURL.GetMainURL(INetURLObject::NO_DECODE),STREAM_READ);

			if (pFileStream && pFileStream->Seek(STREAM_SEEK_TO_END))
			{
				//	aStatus.SetError(ERRCODE_IO_ALREADYEXISTS,TABLE,aFile.GetFull());
				return sal_False;
			}
			delete pFileStream;
		}
	}
	catch(Exception&) // a execption is thrown when no file exists
	{
	}

	sal_Bool bMemoFile = sal_False;

	sal_Bool bOk = CreateFile(aURL, bMemoFile);

	FileClose();

	if (!bOk)
	{
		try
		{
			Content aContent(aURL.GetMainURL(INetURLObject::NO_DECODE),Reference<XCommandEnvironment>());
			aContent.executeCommand( rtl::OUString::createFromAscii( "delete" ),bool2any( sal_True ) );
		}
		catch(Exception&) // a execption is thrown when no file exists
		{
		}
		return sal_False;
	}

	if (bMemoFile)
	{
		String aExt = aURL.getExtension();
		aURL.setExtension(String::CreateFromAscii("dbt"));                      // extension for memo file
		Content aMemo1Content(aURL.GetMainURL(INetURLObject::NO_DECODE),Reference<XCommandEnvironment>());

		sal_Bool bMemoAlreadyExists = sal_False;
		try
		{
			bMemoAlreadyExists = aMemo1Content.isDocument();
		}
		catch(Exception&) // a execption is thrown when no file exists
		{
		}
		if (bMemoAlreadyExists)
		{
			//	aStatus.SetError(ERRCODE_IO_ALREADYEXISTS,MEMO,aFile.GetFull());
			aURL.setExtension(aExt);      // kill dbf file
			try
			{
				Content aMemoContent(aURL.GetMainURL(INetURLObject::NO_DECODE),Reference<XCommandEnvironment>());
				aMemoContent.executeCommand( rtl::OUString::createFromAscii( "delete" ),bool2any( sal_True ) );
			}
			catch(const Exception&)
			{

                const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                        STR_COULD_NOT_DELETE_FILE,
                        "$name$", aName
                     ) );
                ::dbtools::throwGenericSQLException( sError, *this );
			}
		}
		if (!CreateMemoFile(aURL))
		{
			aURL.setExtension(aExt);      // kill dbf file
			Content aMemoContent(aURL.GetMainURL(INetURLObject::NO_DECODE),Reference<XCommandEnvironment>());
			aMemoContent.executeCommand( rtl::OUString::createFromAscii( "delete" ),bool2any( sal_True ) );
			return sal_False;
		}
		m_aHeader.db_typ = dBaseIIIMemo;
	}
	else
		m_aHeader.db_typ = dBaseIII;

	return sal_True;
}
// -----------------------------------------------------------------------------
void ODbaseTable::throwInvalidColumnType(const sal_uInt16 _nErrorId,const ::rtl::OUString& _sColumnName)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::throwInvalidColumnType" );
	try
	{
		// we have to drop the file because it is corrupted now
		DropImpl();
	}
	catch(const Exception&)
	{
	}

    const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
            _nErrorId,
            "$columnname$", _sColumnName
         ) );
    ::dbtools::throwGenericSQLException( sError, *this );
}
//------------------------------------------------------------------
// erzeugt grundsaetzlich dBase IV Datei Format
sal_Bool ODbaseTable::CreateFile(const INetURLObject& aFile, sal_Bool& bCreateMemo)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::CreateFile" );
	bCreateMemo = sal_False;
	Date aDate;                                     // aktuelles Datum

	m_pFileStream = createStream_simpleError( aFile.GetMainURL(INetURLObject::NO_DECODE),STREAM_READWRITE | STREAM_SHARE_DENYWRITE | STREAM_TRUNC );

	if (!m_pFileStream)
		return sal_False;

    sal_uInt8 nDbaseType = dBaseIII;
    Reference<XIndexAccess> xColumns(getColumns(),UNO_QUERY);
	Reference<XPropertySet> xCol;
    const ::rtl::OUString sPropType = OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE);

    try
	{
        const sal_Int32 nCount = xColumns->getCount();
		for(sal_Int32 i=0;i<nCount;++i)
		{
			xColumns->getByIndex(i) >>= xCol;
			OSL_ENSURE(xCol.is(),"This should be a column!");

			switch (getINT32(xCol->getPropertyValue(sPropType)))
			{
                case DataType::DOUBLE:
                case DataType::INTEGER:
                case DataType::TIMESTAMP:
                case DataType::LONGVARBINARY:
                    nDbaseType = VisualFoxPro;
                    i = nCount; // no more columns need to be checked
                    break;
            } // switch (getINT32(xCol->getPropertyValue(sPropType)))
        }
    }
    catch ( const Exception& e )
	{
        (void)e;

		try
		{
			// we have to drop the file because it is corrupted now
			DropImpl();
		}
		catch(const Exception&) { }
		throw;
	}

	char aBuffer[21];               // write buffer
	memset(aBuffer,0,sizeof(aBuffer));

	m_pFileStream->Seek(0L);
	(*m_pFileStream) << (sal_uInt8) nDbaseType;                              // dBase format
	(*m_pFileStream) << (sal_uInt8) (aDate.GetYear() % 100);                 // aktuelles Datum


	(*m_pFileStream) << (sal_uInt8) aDate.GetMonth();
	(*m_pFileStream) << (sal_uInt8) aDate.GetDay();
    (*m_pFileStream) << 0L;                                             // Anzahl der Datensaetze
	(*m_pFileStream) << (sal_uInt16)((m_pColumns->getCount()+1) * 32 + 1);  // Kopfinformationen,
                                                                        // pColumns erhaelt immer eine Spalte mehr
    (*m_pFileStream) << (sal_uInt16) 0;                                     // Satzlaenge wird spaeter bestimmt
	m_pFileStream->Write(aBuffer, 20);

    sal_uInt16 nRecLength = 1;                                              // Laenge 1 fuer deleted flag
	sal_Int32  nMaxFieldLength = m_pConnection->getMetaData()->getMaxColumnNameLength();
	::rtl::OUString aName;
    const ::rtl::OUString sPropName = OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME);
    const ::rtl::OUString sPropPrec = OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_PRECISION);
    const ::rtl::OUString sPropScale = OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_SCALE);

	try
	{
		const sal_Int32 nCount = xColumns->getCount();
		for(sal_Int32 i=0;i<nCount;++i)
		{
			xColumns->getByIndex(i) >>= xCol;
			OSL_ENSURE(xCol.is(),"This should be a column!");

            char cTyp( 'C' );

			xCol->getPropertyValue(sPropName) >>= aName;

			::rtl::OString aCol;
			if ( DBTypeConversion::convertUnicodeString( aName, aCol, m_eEncoding ) > nMaxFieldLength)
			{
                throwInvalidColumnType( STR_INVALID_COLUMN_NAME_LENGTH, aName );
			}

			(*m_pFileStream) << aCol.getStr();
			m_pFileStream->Write(aBuffer, 11 - aCol.getLength());

            sal_Int32 nPrecision = 0;
			xCol->getPropertyValue(sPropPrec) >>= nPrecision;
			sal_Int32 nScale = 0;
			xCol->getPropertyValue(sPropScale) >>= nScale;

            bool bBinary = false;

			switch (getINT32(xCol->getPropertyValue(sPropType)))
			{
				case DataType::CHAR:
				case DataType::VARCHAR:
					cTyp = 'C';
					break;
                case DataType::DOUBLE:
                    if (getBOOL(xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_ISCURRENCY)))) // Currency wird gesondert behandelt
                        cTyp = 'Y';
                    else
                        cTyp = 'B';
					break;
                case DataType::INTEGER:
                    cTyp = 'I';
				    break;
				case DataType::TINYINT:
				case DataType::SMALLINT:
				case DataType::BIGINT:
				case DataType::DECIMAL:
				case DataType::NUMERIC:
				case DataType::REAL:
					cTyp = 'N';                             // nur dBase 3 format
					break;
                case DataType::TIMESTAMP:
                    cTyp = 'T';
				    break;
				case DataType::DATE:
					cTyp = 'D';
					break;
				case DataType::BIT:
					cTyp = 'L';
					break;
				case DataType::LONGVARBINARY:
                    bBinary = true;
                    // run through
				case DataType::LONGVARCHAR:
					cTyp = 'M';
					break;
				default:
					{
						throwInvalidColumnType(STR_INVALID_COLUMN_TYPE, aName);
					}
			}

			(*m_pFileStream) << cTyp;
            if ( nDbaseType == VisualFoxPro )
                (*m_pFileStream) << (nRecLength-1);
            else
			    m_pFileStream->Write(aBuffer, 4);

			switch(cTyp)
			{
				case 'C':
					OSL_ENSURE(nPrecision < 255, "ODbaseTable::Create: Column zu lang!");
					if (nPrecision > 254)
					{
						throwInvalidColumnType(STR_INVALID_COLUMN_PRECISION, aName);
					}
					(*m_pFileStream) << (sal_uInt8) Min((sal_uIntPtr)nPrecision, 255UL);      //Feldlaenge
                    nRecLength = nRecLength + (sal_uInt16)::std::min((sal_uInt16)nPrecision, (sal_uInt16)255UL);
					(*m_pFileStream) << (sal_uInt8)0;                                                                //Nachkommastellen
					break;
				case 'F':
				case 'N':
					OSL_ENSURE(nPrecision >=  nScale,
							"ODbaseTable::Create: Feldlaenge muss groesser Nachkommastellen sein!");
					if (nPrecision <  nScale)
					{
						throwInvalidColumnType(STR_INVALID_PRECISION_SCALE, aName);
					}
					if (getBOOL(xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_ISCURRENCY)))) // Currency wird gesondert behandelt
					{
						(*m_pFileStream) << (sal_uInt8)10;          // Standard Laenge
						(*m_pFileStream) << (sal_uInt8)4;
						nRecLength += 10;
					}
					else
					{
						sal_Int32 nPrec = SvDbaseConverter::ConvertPrecisionToDbase(nPrecision,nScale);

						(*m_pFileStream) << (sal_uInt8)( nPrec);
						(*m_pFileStream) << (sal_uInt8)nScale;
                        nRecLength += (sal_uInt16)nPrec;
					}
					break;
				case 'L':
					(*m_pFileStream) << (sal_uInt8)1;
					(*m_pFileStream) << (sal_uInt8)0;
					++nRecLength;
					break;
                case 'I':
					(*m_pFileStream) << (sal_uInt8)4;
					(*m_pFileStream) << (sal_uInt8)0;
					nRecLength += 4;
					break;
                case 'Y':
                case 'B':
                case 'T':
				case 'D':
					(*m_pFileStream) << (sal_uInt8)8;
					(*m_pFileStream) << (sal_uInt8)0;
					nRecLength += 8;
					break;
				case 'M':
					bCreateMemo = sal_True;
					(*m_pFileStream) << (sal_uInt8)10;
					(*m_pFileStream) << (sal_uInt8)0;
					nRecLength += 10;
                    if ( bBinary )
                        aBuffer[0] = 0x06;
					break;
				default:
                    throwInvalidColumnType(STR_INVALID_COLUMN_TYPE, aName);
			}
			m_pFileStream->Write(aBuffer, 14);
            aBuffer[0] = 0x00;
		}

		(*m_pFileStream) << (sal_uInt8)FIELD_DESCRIPTOR_TERMINATOR;              // kopf ende
        (*m_pFileStream) << (char)DBF_EOL;
		m_pFileStream->Seek(10L);
		(*m_pFileStream) << nRecLength;                                     // Satzlaenge nachtraeglich eintragen

		if (bCreateMemo)
		{
			m_pFileStream->Seek(0L);
            if (nDbaseType == VisualFoxPro)
                (*m_pFileStream) << (sal_uInt8) FoxProMemo;
            else
                (*m_pFileStream) << (sal_uInt8) dBaseIIIMemo;
		} // if (bCreateMemo)
	}
	catch ( const Exception& e )
	{
        (void)e;

		try
		{
			// we have to drop the file because it is corrupted now
			DropImpl();
		}
		catch(const Exception&) { }
		throw;
	}
	return sal_True;
}

//------------------------------------------------------------------
// erzeugt grundsaetzlich dBase III Datei Format
sal_Bool ODbaseTable::CreateMemoFile(const INetURLObject& aFile)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::CreateMemoFile" );
    // Makro zum Filehandling fuers Erzeugen von Tabellen
	m_pMemoStream = createStream_simpleError( aFile.GetMainURL(INetURLObject::NO_DECODE),STREAM_READWRITE | STREAM_SHARE_DENYWRITE);

	if (!m_pMemoStream)
		return sal_False;

	char aBuffer[512];              // write buffer
	memset(aBuffer,0,sizeof(aBuffer));

	m_pMemoStream->SetFiller('\0');
	m_pMemoStream->SetStreamSize(512);

	m_pMemoStream->Seek(0L);
	(*m_pMemoStream) << long(1);                  // Zeiger auf ersten freien Block

	m_pMemoStream->Flush();
	delete m_pMemoStream;
	m_pMemoStream = NULL;
	return sal_True;
}
//------------------------------------------------------------------
sal_Bool ODbaseTable::Drop_Static(const ::rtl::OUString& _sUrl,sal_Bool _bHasMemoFields,OCollection* _pIndexes )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::Drop_Static" );
	INetURLObject aURL;
	aURL.SetURL(_sUrl);

	sal_Bool bDropped = ::utl::UCBContentHelper::Kill(aURL.GetMainURL(INetURLObject::NO_DECODE));

	if(bDropped)
	{
		if (_bHasMemoFields)
		{  // delete the memo fields
			aURL.setExtension(String::CreateFromAscii("dbt"));
			bDropped = ::utl::UCBContentHelper::Kill(aURL.GetMainURL(INetURLObject::NO_DECODE));
		}

		if(bDropped)
		{
			if(_pIndexes)
			{
				try
				{
					sal_Int32 i = _pIndexes->getCount();
					while (i)
					{
						_pIndexes->dropByIndex(--i);
					}
				}
				catch(SQLException)
				{
				}
			}
			//	aFile.SetBase(m_Name);
			aURL.setExtension(String::CreateFromAscii("inf"));

			// as the inf file does not necessarily exist, we aren't allowed to use UCBContentHelper::Kill
			// 89711 - 16.07.2001 - frank.schoenheit@sun.com
			try
			{
				::ucbhelper::Content aDeleteContent( aURL.GetMainURL( INetURLObject::NO_DECODE ), Reference< XCommandEnvironment > () );
				aDeleteContent.executeCommand( ::rtl::OUString::createFromAscii( "delete" ), makeAny( sal_Bool( sal_True ) ) );
			}
			catch(Exception&)
			{
				// silently ignore this ....
			}
		}
	}
	return bDropped;
}
// -----------------------------------------------------------------------------
sal_Bool ODbaseTable::DropImpl()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::DropImpl" );
	FileClose();

	if(!m_pIndexes)
		refreshIndexes(); // look for indexes which must be deleted as well

	sal_Bool bDropped = Drop_Static(getEntry(m_pConnection,m_Name),HasMemoFields(),m_pIndexes);
	if(!bDropped)
	{// we couldn't drop the table so we have to reopen it
		construct();
		if(m_pColumns)
			m_pColumns->refresh();
	}
	return bDropped;
}

//------------------------------------------------------------------
sal_Bool ODbaseTable::InsertRow(OValueRefVector& rRow, sal_Bool bFlush,const Reference<XIndexAccess>& _xCols)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::InsertRow" );
    // Buffer mit Leerzeichen fuellen
	AllocBuffer();
	memset(m_pBuffer, 0, m_aHeader.db_slng);
    m_pBuffer[0] = ' ';

	// Gesamte neue Row uebernehmen:
	// ... und am Ende als neuen Record hinzufuegen:
	sal_uInt32 nTempPos = m_nFilePos,
		   nFileSize = 0,
		   nMemoFileSize = 0;

	m_nFilePos = (sal_uIntPtr)m_aHeader.db_anz + 1;
    sal_Bool bInsertRow = UpdateBuffer( rRow, NULL, _xCols );
	if ( bInsertRow )
	{
		nFileSize = lcl_getFileSize(*m_pFileStream);

		if (HasMemoFields() && m_pMemoStream)
		{
			m_pMemoStream->Seek(STREAM_SEEK_TO_END);
			nMemoFileSize = m_pMemoStream->Tell();
		}

		if (!WriteBuffer())
		{
            m_pFileStream->SetStreamSize(nFileSize);                // alte Groesse restaurieren

			if (HasMemoFields() && m_pMemoStream)
                m_pMemoStream->SetStreamSize(nMemoFileSize);    // alte Groesse restaurieren
			m_nFilePos = nTempPos;								// Fileposition restaurieren
		}
		else
		{
            (*m_pFileStream) << (char)DBF_EOL; // write EOL
			// Anzahl Datensaetze im Header erhoehen:
			m_pFileStream->Seek( 4L );
			(*m_pFileStream) << (m_aHeader.db_anz + 1);

			// beim AppendOnly kein Flush!
			if (bFlush)
				m_pFileStream->Flush();

            // bei Erfolg # erhoehen
			m_aHeader.db_anz++;
			*rRow.get()[0] = m_nFilePos;							    // BOOKmark setzen
			m_nFilePos = nTempPos;
		}
	}
	else
		m_nFilePos = nTempPos;

	return bInsertRow;
}

//------------------------------------------------------------------
sal_Bool ODbaseTable::UpdateRow(OValueRefVector& rRow, OValueRefRow& pOrgRow,const Reference<XIndexAccess>& _xCols)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::UpdateRow" );
    // Buffer mit Leerzeichen fuellen
	AllocBuffer();

	// Auf gewuenschten Record positionieren:
	long nPos = m_aHeader.db_kopf + (long)(m_nFilePos-1) * m_aHeader.db_slng;
	m_pFileStream->Seek(nPos);
	m_pFileStream->Read((char*)m_pBuffer, m_aHeader.db_slng);

	sal_uInt32 nMemoFileSize( 0 );
	if (HasMemoFields() && m_pMemoStream)
	{
		m_pMemoStream->Seek(STREAM_SEEK_TO_END);
		nMemoFileSize = m_pMemoStream->Tell();
	}
	if (!UpdateBuffer(rRow, pOrgRow,_xCols) || !WriteBuffer())
	{
		if (HasMemoFields() && m_pMemoStream)
            m_pMemoStream->SetStreamSize(nMemoFileSize);    // alte Groesse restaurieren
	}
	else
	{
		m_pFileStream->Flush();
	}
	return sal_True;
}

//------------------------------------------------------------------
sal_Bool ODbaseTable::DeleteRow(const OSQLColumns& _rCols)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::DeleteRow" );
	// Einfach das Loesch-Flag setzen (egal, ob es schon gesetzt war
	// oder nicht):
	// Auf gewuenschten Record positionieren:
	long nFilePos = m_aHeader.db_kopf + (long)(m_nFilePos-1) * m_aHeader.db_slng;
	m_pFileStream->Seek(nFilePos);

	OValueRefRow aRow = new OValueRefVector(_rCols.get().size());

	if (!fetchRow(aRow,_rCols,sal_True,sal_True))
		return sal_False;

	Reference<XPropertySet> xCol;
	::rtl::OUString aColName;
	::comphelper::UStringMixEqual aCase(isCaseSensitive());
	for (sal_uInt16 i = 0; i < m_pColumns->getCount(); i++)
	{
		Reference<XPropertySet> xIndex = isUniqueByColumnName(i);
		if (xIndex.is())
		{
			::cppu::extractInterface(xCol,m_pColumns->getByIndex(i));
			OSL_ENSURE(xCol.is(),"ODbaseTable::DeleteRow column is null!");
			if(xCol.is())
			{
				xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= aColName;

				Reference<XUnoTunnel> xTunnel(xIndex,UNO_QUERY);
				OSL_ENSURE(xTunnel.is(),"No TunnelImplementation!");
				ODbaseIndex* pIndex = reinterpret_cast< ODbaseIndex* >( xTunnel->getSomething(ODbaseIndex::getUnoTunnelImplementationId()) );
				OSL_ENSURE(pIndex,"ODbaseTable::DeleteRow: No Index returned!");

				OSQLColumns::Vector::const_iterator aIter = _rCols.get().begin();
				sal_Int32 nPos = 1;
				for(;aIter != _rCols.get().end();++aIter,++nPos)
				{
					if(aCase(getString((*aIter)->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_REALNAME))),aColName))
						break;
				}
				if (aIter == _rCols.get().end())
					continue;

				pIndex->Delete(m_nFilePos,*(aRow->get())[nPos]);
			}
		}
	}

	m_pFileStream->Seek(nFilePos);
	(*m_pFileStream) << (sal_uInt8)'*'; // mark the row in the table as deleted
	m_pFileStream->Flush();
	return sal_True;
}
// -------------------------------------------------------------------------
Reference<XPropertySet> ODbaseTable::isUniqueByColumnName(sal_Int32 _nColumnPos)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::isUniqueByColumnName" );
	if(!m_pIndexes)
		refreshIndexes();
	if(m_pIndexes->hasElements())
	{
		Reference<XPropertySet> xCol;
		m_pColumns->getByIndex(_nColumnPos) >>= xCol;
		OSL_ENSURE(xCol.is(),"ODbaseTable::isUniqueByColumnName column is null!");
		::rtl::OUString sColName;
		xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= sColName;

		Reference<XPropertySet> xIndex;
		for(sal_Int32 i=0;i<m_pIndexes->getCount();++i)
		{
			::cppu::extractInterface(xIndex,m_pIndexes->getByIndex(i));
			if(xIndex.is() && getBOOL(xIndex->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_ISUNIQUE))))
			{
				Reference<XNameAccess> xCols(Reference<XColumnsSupplier>(xIndex,UNO_QUERY)->getColumns());
				if(xCols->hasByName(sColName))
					return xIndex;

			}
		}
	}
	return Reference<XPropertySet>();
}
//------------------------------------------------------------------
double toDouble(const ByteString& rString)
{
    return ::rtl::math::stringToDouble( rString, '.', ',', NULL, NULL );
}

//------------------------------------------------------------------
sal_Bool ODbaseTable::UpdateBuffer(OValueRefVector& rRow, OValueRefRow pOrgRow,const Reference<XIndexAccess>& _xCols)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::UpdateBuffer" );
	OSL_ENSURE(m_pBuffer,"Buffer is NULL!");
	if ( !m_pBuffer )
		return sal_False;
	sal_Int32 nByteOffset  = 1;

	// Felder aktualisieren:
	Reference<XPropertySet> xCol;
	Reference<XPropertySet> xIndex;
	sal_uInt16 i;
	::rtl::OUString aColName;
	const sal_Int32 nColumnCount = m_pColumns->getCount();
	::std::vector< Reference<XPropertySet> > aIndexedCols(nColumnCount);

	::comphelper::UStringMixEqual aCase(isCaseSensitive());

	Reference<XIndexAccess> xColumns = m_pColumns;
	// first search a key that exist already in the table
	for (i = 0; i < nColumnCount; ++i)
	{
		sal_Int32 nPos = i;
		if(_xCols != xColumns)
		{
			m_pColumns->getByIndex(i) >>= xCol;
			OSL_ENSURE(xCol.is(),"ODbaseTable::UpdateBuffer column is null!");
			xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= aColName;

			for(nPos = 0;nPos<_xCols->getCount();++nPos)
			{
				Reference<XPropertySet> xFindCol;
				::cppu::extractInterface(xFindCol,_xCols->getByIndex(nPos));
				OSL_ENSURE(xFindCol.is(),"ODbaseTable::UpdateBuffer column is null!");
				if(aCase(getString(xFindCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME))),aColName))
					break;
			}
			if (nPos >= _xCols->getCount())
				continue;
		}

		++nPos;
		xIndex = isUniqueByColumnName(i);
		aIndexedCols[i] = xIndex;
		if (xIndex.is())
		{
			// first check if the value is different to the old one and when if it conform to the index
			if(pOrgRow.isValid() && (rRow.get()[nPos]->getValue().isNull() || rRow.get()[nPos] == (pOrgRow->get())[nPos]))
				continue;
			else
			{
				//	ODbVariantRef xVar = (pVal == NULL) ? new ODbVariant() : pVal;
				Reference<XUnoTunnel> xTunnel(xIndex,UNO_QUERY);
				OSL_ENSURE(xTunnel.is(),"No TunnelImplementation!");
				ODbaseIndex* pIndex = reinterpret_cast< ODbaseIndex* >( xTunnel->getSomething(ODbaseIndex::getUnoTunnelImplementationId()) );
				OSL_ENSURE(pIndex,"ODbaseTable::UpdateBuffer: No Index returned!");

				if (pIndex->Find(0,*rRow.get()[nPos]))
				{
					// es existiert kein eindeutiger Wert
					if ( !aColName.getLength() )
					{
						m_pColumns->getByIndex(i) >>= xCol;
						OSL_ENSURE(xCol.is(),"ODbaseTable::UpdateBuffer column is null!");
						xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= aColName;
						xCol.clear();
					} // if ( !aColName.getLength() )
                    const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                            STR_DUPLICATE_VALUE_IN_COLUMN
                            ,"$columnname$", aColName
                         ) );
                    ::dbtools::throwGenericSQLException( sError, *this );
				}
			}
		}
	}

	// when we are here there is no double key in the table

	for (i = 0; i < nColumnCount && nByteOffset <= m_nBufferSize ; ++i)
	{
		// Laengen je nach Datentyp:
		OSL_ENSURE(i < m_aPrecisions.size(),"Illegal index!");
		sal_Int32 nLen = 0;
		sal_Int32 nType = 0;
		sal_Int32 nScale = 0;
		if ( i < m_aPrecisions.size() )
		{
			nLen	= m_aPrecisions[i];
			nType	= m_aTypes[i];
			nScale	= m_aScales[i];
		}
		else
		{
			m_pColumns->getByIndex(i) >>= xCol;
			if ( xCol.is() )
			{
				xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_PRECISION))	>>= nLen;
				xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE))		>>= nType;
				xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_SCALE))		>>= nScale;
			}
		}

        bool bSetZero = false;
		switch (nType)
		{
            case DataType::INTEGER:
            case DataType::DOUBLE:
            case DataType::TIMESTAMP:
                bSetZero = true;
            case DataType::LONGVARBINARY:
			case DataType::DATE:
            case DataType::BIT:
			case DataType::LONGVARCHAR:
                nLen = m_aRealFieldLengths[i];
                break;
			case DataType::DECIMAL:
				nLen = SvDbaseConverter::ConvertPrecisionToDbase(nLen,nScale);
				break;	// das Vorzeichen und das Komma
			default:
                break;

		} // switch (nType)

		sal_Int32 nPos = i;
		if(_xCols != xColumns)
		{
			m_pColumns->getByIndex(i) >>= xCol;
			OSL_ENSURE(xCol.is(),"ODbaseTable::UpdateBuffer column is null!");
			xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= aColName;
			for(nPos = 0;nPos<_xCols->getCount();++nPos)
			{
				Reference<XPropertySet> xFindCol;
				::cppu::extractInterface(xFindCol,_xCols->getByIndex(nPos));
				if(aCase(getString(xFindCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME))),aColName))
					break;
			}
			if (nPos >= _xCols->getCount())
			{
				nByteOffset += nLen;
				continue;
			}
		}



		++nPos; // the row values start at 1
		// Ist die Variable ueberhaupt gebunden?
		if ( !rRow.get()[nPos]->isBound() )
		{
			// Nein - naechstes Feld.
			nByteOffset += nLen;
			continue;
		}
		if (aIndexedCols[i].is())
		{
			Reference<XUnoTunnel> xTunnel(aIndexedCols[i],UNO_QUERY);
			OSL_ENSURE(xTunnel.is(),"No TunnelImplementation!");
			ODbaseIndex* pIndex = reinterpret_cast< ODbaseIndex* >( xTunnel->getSomething(ODbaseIndex::getUnoTunnelImplementationId()) );
			OSL_ENSURE(pIndex,"ODbaseTable::UpdateBuffer: No Index returned!");
			// Update !!
			if (pOrgRow.isValid() && !rRow.get()[nPos]->getValue().isNull() )//&& pVal->isModified())
				pIndex->Update(m_nFilePos,*(pOrgRow->get())[nPos],*rRow.get()[nPos]);
			else
				pIndex->Insert(m_nFilePos,*rRow.get()[nPos]);
		}

		char* pData = (char *)(m_pBuffer + nByteOffset);
		if (rRow.get()[nPos]->getValue().isNull())
		{
            if ( bSetZero )
                memset(pData,0,nLen);	// Zuruecksetzen auf NULL
            else
			    memset(pData,' ',nLen);	// Zuruecksetzen auf NULL
			nByteOffset += nLen;
			OSL_ENSURE( nByteOffset <= m_nBufferSize ,"ByteOffset > m_nBufferSize!");
			continue;
		}

        sal_Bool bHadError = sal_False;
		try
		{
			switch (nType)
			{
                case DataType::TIMESTAMP:
                    {
                        OSL_ENSURE(nLen == 8, "Invalid length for timestamp field");
                        if (nLen != 8) {
                            bHadError = true;
                            break;
                        }
                        sal_Int32 nJulianDate = 0, nJulianTime = 0;
                        lcl_CalcJulDate(nJulianDate,nJulianTime,rRow.get()[nPos]->getValue());
                        // Genau 8 Byte kopieren:
					    memcpy(pData,&nJulianDate,4);
                        memcpy(pData+4,&nJulianTime,4);
                    }
                    break;
				case DataType::DATE:
				{
                    OSL_ENSURE(nLen == 8, "Invalid length for date field");
                    if (nLen != 8) {
                        bHadError = true;
                        break;
                    }
					::com::sun::star::util::Date aDate;
					if(rRow.get()[nPos]->getValue().getTypeKind() == DataType::DOUBLE)
						aDate = ::dbtools::DBTypeConversion::toDate(rRow.get()[nPos]->getValue().getDouble());
					else
						aDate = rRow.get()[nPos]->getValue();
					char s[9];
					snprintf(s,
						sizeof(s),
						"%04d%02d%02d",
						(int)aDate.Year,
						(int)aDate.Month,
						(int)aDate.Day);

					// Genau 8 Byte kopieren:
					strncpy(pData,s,sizeof s - 1);
				} break;
                case DataType::INTEGER:
                    {
                        OSL_ENSURE(nLen == 4, "Invalid length for integer field");
                        if (nLen != 4) {
                            bHadError = true;
                            break;
                        }
                        sal_Int32 nValue = rRow.get()[nPos]->getValue();
                        memcpy(pData,&nValue,nLen);
                    }
                    break;
                case DataType::DOUBLE:
                    {
                        OSL_ENSURE(nLen == 8, "Invalid length for double field");
                        if (nLen != 8) {
                            bHadError = true;
                            break;
                        }
                        const double d = rRow.get()[nPos]->getValue();
                        m_pColumns->getByIndex(i) >>= xCol;

                        if (getBOOL(xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_ISCURRENCY)))) // Currency wird gesondert behandelt
                        {
                            sal_Int64 nValue = 0;
                            if ( m_aScales[i] )
                                nValue = (sal_Int64)(d * pow(10.0,(int)m_aScales[i]));
                            else
                                nValue = (sal_Int64)(d);
                            memcpy(pData,&nValue,nLen);
                        } // if (getBOOL(xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_ISCURRENCY)))) // Currency wird gesondert behandelt
                        else
                            memcpy(pData,&d,nLen);
                    }
                    break;
				case DataType::DECIMAL:
				{
					memset(pData,' ',nLen);	// Zuruecksetzen auf NULL

					const double n = rRow.get()[nPos]->getValue();

					// ein const_cast, da GetFormatPrecision am SvNumberFormat nicht const ist, obwohl es das eigentlich
					// sein koennte und muesste

					const ByteString aDefaultValue( ::rtl::math::doubleToString( n, rtl_math_StringFormat_F, nScale, '.', NULL, 0));
                    sal_Bool bValidLength  = aDefaultValue.Len() <= nLen;
                    if ( bValidLength )
                    {
					    strncpy(pData,aDefaultValue.GetBuffer(),nLen);
					    // write the resulting double back
					    *rRow.get()[nPos] = toDouble(aDefaultValue);
                    }
                    else
					{
						m_pColumns->getByIndex(i) >>= xCol;
						OSL_ENSURE(xCol.is(),"ODbaseTable::UpdateBuffer column is null!");
						xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= aColName;
                        ::std::list< ::std::pair<const sal_Char* , ::rtl::OUString > > aStringToSubstitutes;
                        aStringToSubstitutes.push_back(::std::pair<const sal_Char* , ::rtl::OUString >("$columnname$", aColName));
                        aStringToSubstitutes.push_back(::std::pair<const sal_Char* , ::rtl::OUString >("$precision$", String::CreateFromInt32(nLen)));
                        aStringToSubstitutes.push_back(::std::pair<const sal_Char* , ::rtl::OUString >("$scale$", String::CreateFromInt32(nScale)));
                        aStringToSubstitutes.push_back(::std::pair<const sal_Char* , ::rtl::OUString >("$value$", ::rtl::OStringToOUString(aDefaultValue,RTL_TEXTENCODING_UTF8)));

                        const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                                STR_INVALID_COLUMN_DECIMAL_VALUE
                                ,aStringToSubstitutes
                             ) );
                        ::dbtools::throwGenericSQLException( sError, *this );
					}
				} break;
				case DataType::BIT:
                    OSL_ENSURE(nLen == 1, "Invalid length for bit field");
                    if (nLen != 1) {
                        bHadError = true;
                        break;
                    }
					*pData = rRow.get()[nPos]->getValue().getBool() ? 'T' : 'F';
					break;
                case DataType::LONGVARBINARY:
				case DataType::LONGVARCHAR:
				{
					char cNext = pData[nLen]; // merken und temporaer durch 0 ersetzen
					pData[nLen] = '\0';		  // das geht, da der Puffer immer ein Zeichen groesser ist ...

					sal_uIntPtr nBlockNo = strtol((const char *)pData,NULL,10);	// Blocknummer lesen

					// Naechstes Anfangszeichen wieder restaurieren:
					pData[nLen] = cNext;
					if (!m_pMemoStream || !WriteMemo(rRow.get()[nPos]->get(), nBlockNo))
						break;

					ByteString aStr;
					ByteString aBlock(ByteString::CreateFromInt32(nBlockNo));
					aStr.Expand(static_cast<sal_uInt16>(nLen - aBlock.Len()), '0' );
					aStr += aBlock;
					// Zeichen kopieren:
					memset(pData,' ',nLen);	// Zuruecksetzen auf NULL
					memcpy(pData, aStr.GetBuffer(), nLen);
				}	break;
				default:
				{
					memset(pData,' ',nLen);	// Zuruecksetzen auf NULL

                    ::rtl::OUString sStringToWrite( rRow.get()[nPos]->getValue().getString() );

                    // convert the string, using the connection's encoding
                    ::rtl::OString sEncoded;

                    DBTypeConversion::convertUnicodeStringToLength( sStringToWrite, sEncoded, nLen, m_eEncoding );
                    memcpy( pData, sEncoded.getStr(), sEncoded.getLength() );

				}
                break;
			}
		}
		catch( SQLException&  )
        {
            throw;
        }
		catch ( Exception& ) { bHadError = sal_True; }

		if ( bHadError )
		{
			m_pColumns->getByIndex(i) >>= xCol;
			OSL_ENSURE( xCol.is(), "ODbaseTable::UpdateBuffer column is null!" );
            if ( xCol.is() )
			    xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= aColName;

			const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                    STR_INVALID_COLUMN_VALUE,
                    "$columnname$", aColName
                 ) );
            ::dbtools::throwGenericSQLException( sError, *this );
		}
		// Und weiter ...
		nByteOffset += nLen;
		OSL_ENSURE( nByteOffset <= m_nBufferSize ,"ByteOffset > m_nBufferSize!");
	}
	return sal_True;
}

// -----------------------------------------------------------------------------
sal_Bool ODbaseTable::WriteMemo(ORowSetValue& aVariable, sal_uIntPtr& rBlockNr)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::WriteMemo" );
	// wird die BlockNr 0 vorgegeben, wird der block ans Ende gehaengt
    sal_uIntPtr nSize = 0;
    ::rtl::OString aStr;
    ::com::sun::star::uno::Sequence<sal_Int8> aValue;
	sal_uInt8 nHeader[4];
    const bool bBinary = aVariable.getTypeKind() == DataType::LONGVARBINARY && m_aMemoHeader.db_typ == MemoFoxPro;
    if ( bBinary )
    {
        aValue = aVariable.getSequence();
        nSize = aValue.getLength();
    }
    else
    {
        nSize = DBTypeConversion::convertUnicodeString( aVariable.getString(), aStr, m_eEncoding );
    }

	// Anhaengen oder ueberschreiben
	sal_Bool bAppend = rBlockNr == 0;

	if (!bAppend)
	{
		switch (m_aMemoHeader.db_typ)
		{
			case MemodBaseIII: // dBase III-Memofeld, endet mit 2 * Ctrl-Z
				bAppend = nSize > (512 - 2);
				break;
			case MemoFoxPro:
			case MemodBaseIV: // dBase IV-Memofeld mit Laengenangabe
			{
				char sHeader[4];
				m_pMemoStream->Seek(rBlockNr * m_aMemoHeader.db_size);
				m_pMemoStream->SeekRel(4L);
				m_pMemoStream->Read(sHeader,4);

				sal_uIntPtr nOldSize;
				if (m_aMemoHeader.db_typ == MemoFoxPro)
					nOldSize = ((((unsigned char)sHeader[0]) * 256 +
								 (unsigned char)sHeader[1]) * 256 +
								 (unsigned char)sHeader[2]) * 256 +
								 (unsigned char)sHeader[3];
				else
					nOldSize = ((((unsigned char)sHeader[3]) * 256 +
								 (unsigned char)sHeader[2]) * 256 +
								 (unsigned char)sHeader[1]) * 256 +
								 (unsigned char)sHeader[0]  - 8;

				// passt die neue Laenge in die belegten Bloecke
				sal_uIntPtr nUsedBlocks = ((nSize + 8) / m_aMemoHeader.db_size) + (((nSize + 8) % m_aMemoHeader.db_size > 0) ? 1 : 0),
					  nOldUsedBlocks = ((nOldSize + 8) / m_aMemoHeader.db_size) + (((nOldSize + 8) % m_aMemoHeader.db_size > 0) ? 1 : 0);
				bAppend = nUsedBlocks > nOldUsedBlocks;
			}
		}
	}

	if (bAppend)
	{
		sal_uIntPtr nStreamSize = m_pMemoStream->Seek(STREAM_SEEK_TO_END);
		// letzten block auffuellen
		rBlockNr = (nStreamSize / m_aMemoHeader.db_size) + ((nStreamSize % m_aMemoHeader.db_size) > 0 ? 1 : 0);

		m_pMemoStream->SetStreamSize(rBlockNr * m_aMemoHeader.db_size);
		m_pMemoStream->Seek(STREAM_SEEK_TO_END);
	}
	else
	{
		m_pMemoStream->Seek(rBlockNr * m_aMemoHeader.db_size);
	}

	switch (m_aMemoHeader.db_typ)
	{
		case MemodBaseIII: // dBase III-Memofeld, endet mit Ctrl-Z
		{
			const char cEOF = (char) DBF_EOL;
			nSize++;
			m_pMemoStream->Write( aStr.getStr(), aStr.getLength() );
			(*m_pMemoStream) << cEOF << cEOF;
		} break;
		case MemoFoxPro:
		case MemodBaseIV: // dBase IV-Memofeld mit Laengenangabe
		{
            if ( MemodBaseIV == m_aMemoHeader.db_typ )
			    (*m_pMemoStream) << (sal_uInt8)0xFF
							     << (sal_uInt8)0xFF
							     << (sal_uInt8)0x08;
            else
                (*m_pMemoStream) << (sal_uInt8)0x00
							     << (sal_uInt8)0x00
							     << (sal_uInt8)0x00;

			sal_uInt32 nWriteSize = nSize;
			if (m_aMemoHeader.db_typ == MemoFoxPro)
			{
                if ( bBinary )
                    (*m_pMemoStream) << (sal_uInt8) 0x00; // Picture
                else
				    (*m_pMemoStream) << (sal_uInt8) 0x01; // Memo
				for (int i = 4; i > 0; nWriteSize >>= 8)
					nHeader[--i] = (sal_uInt8) (nWriteSize % 256);
			}
			else
			{
				(*m_pMemoStream) << (sal_uInt8) 0x00;
				nWriteSize += 8;
				for (int i = 0; i < 4; nWriteSize >>= 8)
					nHeader[i++] = (sal_uInt8) (nWriteSize % 256);
			}

			m_pMemoStream->Write(nHeader,4);
            if ( bBinary )
                m_pMemoStream->Write( aValue.getConstArray(), aValue.getLength() );
            else
			    m_pMemoStream->Write( aStr.getStr(), aStr.getLength() );
			m_pMemoStream->Flush();
		}
	}


	// Schreiben der neuen Blocknummer
	if (bAppend)
	{
		sal_uIntPtr nStreamSize = m_pMemoStream->Seek(STREAM_SEEK_TO_END);
		m_aMemoHeader.db_next = (nStreamSize / m_aMemoHeader.db_size) + ((nStreamSize % m_aMemoHeader.db_size) > 0 ? 1 : 0);

		// Schreiben der neuen Blocknummer
		m_pMemoStream->Seek(0L);
		(*m_pMemoStream) << m_aMemoHeader.db_next;
		m_pMemoStream->Flush();
	}
	return sal_True;
}

// -----------------------------------------------------------------------------
// XAlterTable
void SAL_CALL ODbaseTable::alterColumnByName( const ::rtl::OUString& colName, const Reference< XPropertySet >& descriptor ) throw(SQLException, NoSuchElementException, RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::alterColumnByName" );
	::osl::MutexGuard aGuard(m_aMutex);
	checkDisposed(OTableDescriptor_BASE::rBHelper.bDisposed);


	Reference<XDataDescriptorFactory> xOldColumn;
	m_pColumns->getByName(colName) >>= xOldColumn;

	alterColumn(m_pColumns->findColumn(colName)-1,descriptor,xOldColumn);
}
// -------------------------------------------------------------------------
void SAL_CALL ODbaseTable::alterColumnByIndex( sal_Int32 index, const Reference< XPropertySet >& descriptor ) throw(SQLException, ::com::sun::star::lang::IndexOutOfBoundsException, RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::alterColumnByIndex" );
	::osl::MutexGuard aGuard(m_aMutex);
	checkDisposed(OTableDescriptor_BASE::rBHelper.bDisposed);

	if(index < 0 || index >= m_pColumns->getCount())
		throw IndexOutOfBoundsException(::rtl::OUString::valueOf(index),*this);

	Reference<XDataDescriptorFactory> xOldColumn;
	m_pColumns->getByIndex(index) >>= xOldColumn;
	alterColumn(index,descriptor,xOldColumn);
}
// -----------------------------------------------------------------------------
void ODbaseTable::alterColumn(sal_Int32 index,
							  const Reference< XPropertySet >& descriptor ,
							  const Reference< XDataDescriptorFactory >& xOldColumn )
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::alterColumn" );
	if(index < 0 || index >= m_pColumns->getCount())
		throw IndexOutOfBoundsException(::rtl::OUString::valueOf(index),*this);

	ODbaseTable* pNewTable = NULL;
	try
	{
		OSL_ENSURE(descriptor.is(),"ODbaseTable::alterColumn: descriptor can not be null!");
		// creates a copy of the the original column and copy all properties from descriptor in xCopyColumn
		Reference<XPropertySet> xCopyColumn;
		if(xOldColumn.is())
			xCopyColumn = xOldColumn->createDataDescriptor();
		else
			xCopyColumn = new OColumn(getConnection()->getMetaData()->supportsMixedCaseQuotedIdentifiers());

		::comphelper::copyProperties(descriptor,xCopyColumn);

		// creates a temp file

		String sTempName = createTempFile();

		pNewTable = new ODbaseTable(m_pTables,static_cast<ODbaseConnection*>(m_pConnection));
		Reference<XPropertySet> xHoldTable = pNewTable;
		pNewTable->setPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME),makeAny(::rtl::OUString(sTempName)));
		Reference<XAppend> xAppend(pNewTable->getColumns(),UNO_QUERY);
		OSL_ENSURE(xAppend.is(),"ODbaseTable::alterColumn: No XAppend interface!");

		// copy the structure
		sal_Int32 i=0;
		for(;i < index;++i)
		{
			Reference<XPropertySet> xProp;
			m_pColumns->getByIndex(i) >>= xProp;
			Reference<XDataDescriptorFactory> xColumn(xProp,UNO_QUERY);
			Reference<XPropertySet> xCpy;
			if(xColumn.is())
				xCpy = xColumn->createDataDescriptor();
			else
				xCpy = new OColumn(getConnection()->getMetaData()->supportsMixedCaseQuotedIdentifiers());
			::comphelper::copyProperties(xProp,xCpy);
			xAppend->appendByDescriptor(xCpy);
		}
		++i; // now insert our new column
		xAppend->appendByDescriptor(xCopyColumn);

		for(;i < m_pColumns->getCount();++i)
		{
			Reference<XPropertySet> xProp;
			m_pColumns->getByIndex(i) >>= xProp;
			Reference<XDataDescriptorFactory> xColumn(xProp,UNO_QUERY);
			Reference<XPropertySet> xCpy;
			if(xColumn.is())
				xCpy = xColumn->createDataDescriptor();
			else
				xCpy = new OColumn(getConnection()->getMetaData()->supportsMixedCaseQuotedIdentifiers());
			::comphelper::copyProperties(xProp,xCpy);
			xAppend->appendByDescriptor(xCpy);
		}

		// construct the new table
		if(!pNewTable->CreateImpl())
		{
            const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                    STR_COLUMN_NOT_ALTERABLE,
                    "$columnname$", ::comphelper::getString(descriptor->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)))
                 ) );
            ::dbtools::throwGenericSQLException( sError, *this );
		}

		pNewTable->construct();

		// copy the data
		copyData(pNewTable,0);

		// now drop the old one
		if( DropImpl() ) // we don't want to delete the memo columns too
		{
			// rename the new one to the old one
			pNewTable->renameImpl(m_Name);
			// release the temp file
			pNewTable = NULL;
			::comphelper::disposeComponent(xHoldTable);
		}
		else
		{
			pNewTable = NULL;
		}
		FileClose();
		construct();
		if(m_pColumns)
			m_pColumns->refresh();

	}
	catch(const SQLException&)
	{
		throw;
	}
	catch(const Exception&)
	{
		OSL_ENSURE(0,"ODbaseTable::alterColumn: Exception occured!");
		throw;
	}
}
// -----------------------------------------------------------------------------
Reference< XDatabaseMetaData> ODbaseTable::getMetaData() const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::getMetaData" );
	return getConnection()->getMetaData();
}
// -------------------------------------------------------------------------
void SAL_CALL ODbaseTable::rename( const ::rtl::OUString& newName ) throw(::com::sun::star::sdbc::SQLException, ::com::sun::star::container::ElementExistException, ::com::sun::star::uno::RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::rename" );
	::osl::MutexGuard aGuard(m_aMutex);
	checkDisposed(OTableDescriptor_BASE::rBHelper.bDisposed);
	if(m_pTables && m_pTables->hasByName(newName))
		throw ElementExistException(newName,*this);


	renameImpl(newName);

	ODbaseTable_BASE::rename(newName);

	construct();
	if(m_pColumns)
		m_pColumns->refresh();
}
namespace
{
	void renameFile(OConnection* _pConenction,const ::rtl::OUString& oldName,
					const ::rtl::OUString& newName,const String& _sExtension)
	{
		String aName = ODbaseTable::getEntry(_pConenction,oldName);
		if(!aName.Len())
		{
			::rtl::OUString aIdent = _pConenction->getContent()->getIdentifier()->getContentIdentifier();
			if ( aIdent.lastIndexOf('/') != (aIdent.getLength()-1) )
				aIdent += ::rtl::OUString::createFromAscii("/");
			aIdent += oldName;
			aName = aIdent;
		}
		INetURLObject aURL;
		aURL.SetURL(aName);

		aURL.setExtension( _sExtension );
		String sNewName(newName);
		sNewName.AppendAscii(".");
		sNewName += _sExtension;

		try
		{
			Content aContent(aURL.GetMainURL(INetURLObject::NO_DECODE),Reference<XCommandEnvironment>());

			Sequence< PropertyValue > aProps( 1 );
			aProps[0].Name		= ::rtl::OUString::createFromAscii("Title");
			aProps[0].Handle	= -1; // n/a
			aProps[0].Value		= makeAny( ::rtl::OUString(sNewName) );
			Sequence< Any > aValues;
			aContent.executeCommand( rtl::OUString::createFromAscii( "setPropertyValues" ),makeAny(aProps) ) >>= aValues;
			if(aValues.getLength() && aValues[0].hasValue())
				throw Exception();
		}
		catch(Exception&)
		{
			throw ElementExistException(newName,NULL);
		}
	}
}
// -------------------------------------------------------------------------
void SAL_CALL ODbaseTable::renameImpl( const ::rtl::OUString& newName ) throw(::com::sun::star::sdbc::SQLException, ::com::sun::star::container::ElementExistException, ::com::sun::star::uno::RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::getEntry" );
	::osl::MutexGuard aGuard(m_aMutex);

	FileClose();


	renameFile(m_pConnection,m_Name,newName,m_pConnection->getExtension());
	if ( HasMemoFields() )
	{  // delete the memo fields
		String sExt = String::CreateFromAscii("dbt");
		renameFile(m_pConnection,m_Name,newName,sExt);
	}
}
// -----------------------------------------------------------------------------
void ODbaseTable::addColumn(const Reference< XPropertySet >& _xNewColumn)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::addColumn" );
	String sTempName = createTempFile();

	ODbaseTable* pNewTable = new ODbaseTable(m_pTables,static_cast<ODbaseConnection*>(m_pConnection));
	Reference< XPropertySet > xHold = pNewTable;
	pNewTable->setPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME),makeAny(::rtl::OUString(sTempName)));
	{
		Reference<XAppend> xAppend(pNewTable->getColumns(),UNO_QUERY);
		sal_Bool bCase = getConnection()->getMetaData()->supportsMixedCaseQuotedIdentifiers();
		// copy the structure
		for(sal_Int32 i=0;i < m_pColumns->getCount();++i)
		{
			Reference<XPropertySet> xProp;
			m_pColumns->getByIndex(i) >>= xProp;
			Reference<XDataDescriptorFactory> xColumn(xProp,UNO_QUERY);
			Reference<XPropertySet> xCpy;
			if(xColumn.is())
				xCpy = xColumn->createDataDescriptor();
			else
			{
				xCpy = new OColumn(bCase);
				::comphelper::copyProperties(xProp,xCpy);
			}

			xAppend->appendByDescriptor(xCpy);
		}
		Reference<XPropertySet> xCpy = new OColumn(bCase);
		::comphelper::copyProperties(_xNewColumn,xCpy);
		xAppend->appendByDescriptor(xCpy);
	}

	// construct the new table
	if(!pNewTable->CreateImpl())
	{
        const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                STR_COLUMN_NOT_ADDABLE,
                "$columnname$", ::comphelper::getString(_xNewColumn->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)))
             ) );
        ::dbtools::throwGenericSQLException( sError, *this );
	}

	sal_Bool bAlreadyDroped = sal_False;
	try
	{
		pNewTable->construct();
		// copy the data
		copyData(pNewTable,pNewTable->m_pColumns->getCount());
		// drop the old table
		if(DropImpl())
		{
			bAlreadyDroped = sal_True;
			pNewTable->renameImpl(m_Name);
			// release the temp file
		}
		xHold = pNewTable = NULL;

		FileClose();
		construct();
		if(m_pColumns)
			m_pColumns->refresh();
	}
	catch(const SQLException&)
	{
		// here we know that the old table wasn't droped before
		if(!bAlreadyDroped)
			xHold = pNewTable = NULL;

		throw;
	}
}
// -----------------------------------------------------------------------------
void ODbaseTable::dropColumn(sal_Int32 _nPos)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::dropColumn" );
	String sTempName = createTempFile();

	ODbaseTable* pNewTable = new ODbaseTable(m_pTables,static_cast<ODbaseConnection*>(m_pConnection));
	Reference< XPropertySet > xHold = pNewTable;
	pNewTable->setPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME),makeAny(::rtl::OUString(sTempName)));
	{
		Reference<XAppend> xAppend(pNewTable->getColumns(),UNO_QUERY);
		sal_Bool bCase = getConnection()->getMetaData()->supportsMixedCaseQuotedIdentifiers();
		// copy the structure
		for(sal_Int32 i=0;i < m_pColumns->getCount();++i)
		{
			if(_nPos != i)
			{
				Reference<XPropertySet> xProp;
				m_pColumns->getByIndex(i) >>= xProp;
				Reference<XDataDescriptorFactory> xColumn(xProp,UNO_QUERY);
				Reference<XPropertySet> xCpy;
				if(xColumn.is())
					xCpy = xColumn->createDataDescriptor();
				else
				{
					xCpy = new OColumn(bCase);
					::comphelper::copyProperties(xProp,xCpy);
				}
				xAppend->appendByDescriptor(xCpy);
			}
		}
	}

	// construct the new table
	if(!pNewTable->CreateImpl())
	{
		xHold = pNewTable = NULL;
        const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                STR_COLUMN_NOT_DROP,
                "$position$", ::rtl::OUString::valueOf(_nPos)
             ) );
        ::dbtools::throwGenericSQLException( sError, *this );
	}
	pNewTable->construct();
	// copy the data
	copyData(pNewTable,_nPos);
	// drop the old table
	if(DropImpl())
		pNewTable->renameImpl(m_Name);
		// release the temp file

	xHold = pNewTable = NULL;

	FileClose();
	construct();
}
// -----------------------------------------------------------------------------
String ODbaseTable::createTempFile()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::createTempFile" );
	::rtl::OUString aIdent = m_pConnection->getContent()->getIdentifier()->getContentIdentifier();
	if ( aIdent.lastIndexOf('/') != (aIdent.getLength()-1) )
		aIdent += ::rtl::OUString::createFromAscii("/");
	String sTempName(aIdent);
	String sExt;
	sExt.AssignAscii(".");
	sExt += m_pConnection->getExtension();

	String sName(m_Name);
	TempFile aTempFile(sName,&sExt,&sTempName);
	if(!aTempFile.IsValid())
        getConnection()->throwGenericSQLException(STR_COULD_NOT_ALTER_TABLE,*this);

	INetURLObject aURL;
	aURL.SetSmartProtocol(INET_PROT_FILE);
	aURL.SetURL(aTempFile.GetURL());

	String sNewName(aURL.getName());
	sNewName.Erase(sNewName.Len() - sExt.Len());
	return sNewName;
}
// -----------------------------------------------------------------------------
void ODbaseTable::copyData(ODbaseTable* _pNewTable,sal_Int32 _nPos)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::copyData" );
	sal_Int32 nPos = _nPos + 1; // +1 because we always have the bookmark clumn as well
	OValueRefRow aRow = new OValueRefVector(m_pColumns->getCount());
	OValueRefRow aInsertRow;
	if(_nPos)
	{
		aInsertRow = new OValueRefVector(_pNewTable->m_pColumns->getCount());
		::std::for_each(aInsertRow->get().begin(),aInsertRow->get().end(),TSetRefBound(sal_True));
	}
	else
		aInsertRow = aRow;

	// we only have to bind the values which we need to copy into the new table
	::std::for_each(aRow->get().begin(),aRow->get().end(),TSetRefBound(sal_True));
	if(_nPos && (_nPos < (sal_Int32)aRow->get().size()))
		(aRow->get())[nPos]->setBound(sal_False);


	sal_Bool bOk = sal_True;
	sal_Int32 nCurPos;
	OValueRefVector::Vector::iterator aIter;
	for(sal_uInt32 nRowPos = 0; nRowPos < m_aHeader.db_anz;++nRowPos)
	{
        bOk = seekRow( IResultSetHelper::BOOKMARK, nRowPos+1, nCurPos );
        if ( bOk )
		{
            bOk = fetchRow( aRow, m_aColumns.getBody(), sal_True, sal_True);
            if ( bOk && !aRow->isDeleted() ) // copy only not deleted rows
			{
				// special handling when pos == 0 then we don't have to distinguish	between the two rows
				if(_nPos)
				{
					aIter = aRow->get().begin()+1;
					sal_Int32 nCount = 1;
					for(OValueRefVector::Vector::iterator aInsertIter = aInsertRow->get().begin()+1; aIter != aRow->get().end() && aInsertIter != aInsertRow->get().end();++aIter,++nCount)
					{
						if(nPos != nCount)
						{
							(*aInsertIter)->setValue( (*aIter)->getValue() );
							++aInsertIter;
						}
					}
				}
				bOk = _pNewTable->InsertRow(*aInsertRow,sal_True,_pNewTable->m_pColumns);
				OSL_ENSURE(bOk,"Row could not be inserted!");
			}
			else
				OSL_ENSURE(bOk,"Row could not be fetched!");
		}
		else
		{
			OSL_ASSERT(0);
		}
	} // for(sal_uInt32 nRowPos = 0; nRowPos < m_aHeader.db_anz;++nRowPos)
}
// -----------------------------------------------------------------------------
void ODbaseTable::throwInvalidDbaseFormat()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::throwInvalidDbaseFormat" );
	FileClose();
	// no dbase file

    const ::rtl::OUString sError( getConnection()->getResources().getResourceStringWithSubstitution(
                STR_INVALID_DBASE_FILE,
                "$filename$", getEntry(m_pConnection,m_Name)
             ) );
    ::dbtools::throwGenericSQLException( sError, *this );
}
// -----------------------------------------------------------------------------
void ODbaseTable::refreshHeader()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::refreshHeader" );
    if ( m_aHeader.db_anz == 0 )
	    readHeader();
}
//------------------------------------------------------------------
sal_Bool ODbaseTable::seekRow(IResultSetHelper::Movement eCursorPosition, sal_Int32 nOffset, sal_Int32& nCurPos)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::seekRow" );
	// ----------------------------------------------------------
	// Positionierung vorbereiten:
	OSL_ENSURE(m_pFileStream,"ODbaseTable::seekRow: FileStream is NULL!");

	sal_uInt32  nNumberOfRecords = (sal_uInt32)m_aHeader.db_anz;
	sal_uInt32 nTempPos = m_nFilePos;
	m_nFilePos = nCurPos;

	switch(eCursorPosition)
	{
		case IResultSetHelper::NEXT:
			++m_nFilePos;
			break;
		case IResultSetHelper::PRIOR:
			if (m_nFilePos > 0)
				--m_nFilePos;
			break;
		case IResultSetHelper::FIRST:
			m_nFilePos = 1;
			break;
		case IResultSetHelper::LAST:
			m_nFilePos = nNumberOfRecords;
			break;
		case IResultSetHelper::RELATIVE:
			m_nFilePos = (((sal_Int32)m_nFilePos) + nOffset < 0) ? 0L
							: (sal_uInt32)(((sal_Int32)m_nFilePos) + nOffset);
			break;
		case IResultSetHelper::ABSOLUTE:
		case IResultSetHelper::BOOKMARK:
			m_nFilePos = (sal_uInt32)nOffset;
			break;
	}

	if (m_nFilePos > (sal_Int32)nNumberOfRecords)
		m_nFilePos = (sal_Int32)nNumberOfRecords + 1;

	if (m_nFilePos == 0 || m_nFilePos == (sal_Int32)nNumberOfRecords + 1)
		goto Error;
	else
	{
		sal_uInt16 nEntryLen = m_aHeader.db_slng;

		OSL_ENSURE(m_nFilePos >= 1,"SdbDBFCursor::FileFetchRow: ungueltige Record-Position");
		sal_Int32 nPos = m_aHeader.db_kopf + (sal_Int32)(m_nFilePos-1) * nEntryLen;

		sal_uIntPtr nLen = m_pFileStream->Seek(nPos);
		if (m_pFileStream->GetError() != ERRCODE_NONE)
			goto Error;

		nLen = m_pFileStream->Read((char*)m_pBuffer, nEntryLen);
		if (m_pFileStream->GetError() != ERRCODE_NONE)
			goto Error;
	}
	goto End;

Error:
	switch(eCursorPosition)
	{
		case IResultSetHelper::PRIOR:
		case IResultSetHelper::FIRST:
			m_nFilePos = 0;
			break;
		case IResultSetHelper::LAST:
		case IResultSetHelper::NEXT:
		case IResultSetHelper::ABSOLUTE:
		case IResultSetHelper::RELATIVE:
			if (nOffset > 0)
				m_nFilePos = nNumberOfRecords + 1;
			else if (nOffset < 0)
				m_nFilePos = 0;
			break;
		case IResultSetHelper::BOOKMARK:
			m_nFilePos = nTempPos;	 // vorherige Position
	}
	//	aStatus.Set(SDB_STAT_NO_DATA_FOUND);
	return sal_False;

End:
	nCurPos = m_nFilePos;
	return sal_True;
}
// -----------------------------------------------------------------------------
sal_Bool ODbaseTable::ReadMemo(sal_uIntPtr nBlockNo, ORowSetValue& aVariable)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::ReadMemo" );
	sal_Bool bIsText = sal_True;
	//	SdbConnection* pConnection = GetConnection();

	m_pMemoStream->Seek(nBlockNo * m_aMemoHeader.db_size);
	switch (m_aMemoHeader.db_typ)
	{
		case MemodBaseIII: // dBase III-Memofeld, endet mit Ctrl-Z
		{
			const char cEOF = (char) DBF_EOL;
			ByteString aBStr;
			static char aBuf[514];
			aBuf[512] = 0;			// sonst kann der Zufall uebel mitspielen
			sal_Bool bReady = sal_False;

			do
			{
				m_pMemoStream->Read(&aBuf,512);

				sal_uInt16 i = 0;
				while (aBuf[i] != cEOF && ++i < 512)
					;
				bReady = aBuf[i] == cEOF;

				aBuf[i] = 0;
				aBStr += aBuf;

			} while (!bReady && !m_pMemoStream->IsEof() && aBStr.Len() < STRING_MAXLEN);

			::rtl::OUString aStr(aBStr.GetBuffer(), aBStr.Len(),m_eEncoding);
			aVariable = aStr;

		} break;
		case MemoFoxPro:
		case MemodBaseIV: // dBase IV-Memofeld mit Laengenangabe
		{
			char sHeader[4];
			m_pMemoStream->Read(sHeader,4);
			// Foxpro stores text and binary data
			if (m_aMemoHeader.db_typ == MemoFoxPro)
			{
//				if (((sal_uInt8)sHeader[0]) != 0 || ((sal_uInt8)sHeader[1]) != 0 || ((sal_uInt8)sHeader[2]) != 0)
//				{
////					String aText = String(SdbResId(STR_STAT_IResultSetHelper::INVALID));
////					aText.SearchAndReplace(String::CreateFromAscii("%%d"),m_pMemoStream->GetFileName());
////					aText.SearchAndReplace(String::CreateFromAscii("%%t"),aStatus.TypeToString(MEMO));
////					aStatus.Set(SDB_STAT_ERROR,
////							String::CreateFromAscii("01000"),
////							aStatus.CreateErrorMessage(aText),
////							0, String() );
//					return sal_False;
//				}
//
				bIsText = sHeader[3] != 0;
			}
			else if (((sal_uInt8)sHeader[0]) != 0xFF || ((sal_uInt8)sHeader[1]) != 0xFF || ((sal_uInt8)sHeader[2]) != 0x08)
			{
//				String aText = String(SdbResId(STR_STAT_IResultSetHelper::INVALID));
//				aText.SearchAndReplace(String::CreateFromAscii("%%d"),m_pMemoStream->GetFileName());
//				aText.SearchAndReplace(String::CreateFromAscii("%%t"),aStatus.TypeToString(MEMO));
//				aStatus.Set(SDB_STAT_ERROR,
//						String::CreateFromAscii("01000"),
//						aStatus.CreateErrorMessage(aText),
//						0, String() );
				return sal_False;
			}

			sal_uInt32 nLength(0);
			(*m_pMemoStream) >> nLength;

			if (m_aMemoHeader.db_typ == MemodBaseIV)
				nLength -= 8;

            if ( nLength )
            {
                if ( bIsText )
                {
			        //	char cChar;
					::rtl::OUStringBuffer aStr;
			        while ( nLength > STRING_MAXLEN )
			        {
				        ByteString aBStr;
				        aBStr.Expand(STRING_MAXLEN);
				        m_pMemoStream->Read(aBStr.AllocBuffer(STRING_MAXLEN),STRING_MAXLEN);
						aStr.append(::rtl::OUString(aBStr.GetBuffer(),aBStr.Len(), m_eEncoding));
				        nLength -= STRING_MAXLEN;
			        }
			        if ( nLength > 0 )
			        {
				        ByteString aBStr;
				        aBStr.Expand(static_cast<xub_StrLen>(nLength));
				        m_pMemoStream->Read(aBStr.AllocBuffer(static_cast<xub_StrLen>(nLength)),nLength);
				        //	aBStr.ReleaseBufferAccess();
						aStr.append(::rtl::OUString(aBStr.GetBuffer(),aBStr.Len(), m_eEncoding));
			        }
			        if ( aStr.getLength() )
						aVariable = aStr.makeStringAndClear();
                } // if ( bIsText )
                else
                {
                    ::com::sun::star::uno::Sequence< sal_Int8 > aData(nLength);
                    m_pMemoStream->Read(aData.getArray(),nLength);
                    aVariable = aData;
                }
            } // if ( nLength )
		}
	}
	return sal_True;
}
// -----------------------------------------------------------------------------
void ODbaseTable::AllocBuffer()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::AllocBuffer" );
	sal_uInt16 nSize = m_aHeader.db_slng;
	OSL_ENSURE(nSize > 0, "Size too small");

	if (m_nBufferSize != nSize)
	{
		delete m_pBuffer;
		m_pBuffer = NULL;
	}

	// Falls noch kein Puffer vorhanden: allozieren:
	if (m_pBuffer == NULL && nSize > 0)
	{
		m_nBufferSize = nSize;
		m_pBuffer		= new sal_uInt8[m_nBufferSize+1];
	}
}
// -----------------------------------------------------------------------------
sal_Bool ODbaseTable::WriteBuffer()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::WriteBuffer" );
	OSL_ENSURE(m_nFilePos >= 1,"SdbDBFCursor::FileFetchRow: ungueltige Record-Position");

	// Auf gewuenschten Record positionieren:
	long nPos = m_aHeader.db_kopf + (long)(m_nFilePos-1) * m_aHeader.db_slng;
	m_pFileStream->Seek(nPos);
	return m_pFileStream->Write((char*) m_pBuffer, m_aHeader.db_slng) > 0;
}
// -----------------------------------------------------------------------------
sal_Int32 ODbaseTable::getCurrentLastPos() const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ODbaseTable::getCurrentLastPos" );
	return m_aHeader.db_anz;
}