xref: /trunk/main/connectivity/source/drivers/dbase/DNoException.cxx (revision 9b5730f6ddef7eb82608ca4d31dc0d7678e652cf)

/**************************************************************
 *
 * 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 "dbase/DIndex.hxx"
#include "dbase/dindexnode.hxx"
#include <tools/debug.hxx>
#include "diagnose_ex.h"

#include <sal/types.h>
#include <algorithm>
#include <rtl/logfile.hxx>

using namespace connectivity;
using namespace connectivity::dbase;
using namespace com::sun::star::uno;
using namespace com::sun::star::sdbc;
//------------------------------------------------------------------
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) 0x1a;
            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(),getConnection()->getTextEncoding());
            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;
            (*m_pMemoStream) >> nLength;

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

            //  char cChar;
            ::rtl::OUString aStr;
            while ( nLength > STRING_MAXLEN )
            {
                ByteString aBStr;
                aBStr.Expand(STRING_MAXLEN);
                m_pMemoStream->Read(aBStr.AllocBuffer(STRING_MAXLEN),STRING_MAXLEN);
                aStr += ::rtl::OUString(aBStr.GetBuffer(),aBStr.Len(), getConnection()->getTextEncoding());
                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 += ::rtl::OUString(aBStr.GetBuffer(),aBStr.Len(), getConnection()->getTextEncoding());

            }
            if ( aStr.getLength() )
                aVariable = aStr;
        }
    }
    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;
}
// -----------------------------------------------------------------------------
//==================================================================
// ONDXNode
//==================================================================

//------------------------------------------------------------------
void ONDXNode::Read(SvStream &rStream, ODbaseIndex& rIndex)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXNode::Read" );
    rStream >> aKey.nRecord; // schluessel

    if (rIndex.getHeader().db_keytype)
    {
        double aDbl;
        rStream >> aDbl;
        aKey = ONDXKey(aDbl,aKey.nRecord);
    }
    else
    {
        ByteString aBuf;
        sal_uInt16 nLen = rIndex.getHeader().db_keylen;
        char* pStr = aBuf.AllocBuffer(nLen+1);

        rStream.Read(pStr,nLen);
        pStr[nLen] = 0;
        aBuf.ReleaseBufferAccess();
        aBuf.EraseTrailingChars();

        //  aKey = ONDXKey((aBuf,rIndex.GetDBFConnection()->GetCharacterSet()) ,aKey.nRecord);
        aKey = ONDXKey(::rtl::OUString(aBuf.GetBuffer(),aBuf.Len(),rIndex.m_pTable->getConnection()->getTextEncoding()) ,aKey.nRecord);
    }
    rStream >> aChild;
}

union
{
    double aDbl;
    char   aData[128];
} aNodeData;
//------------------------------------------------------------------
void ONDXNode::Write(SvStream &rStream, const ONDXPage& rPage) const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXNode::Write" );
    const ODbaseIndex& rIndex = rPage.GetIndex();
    if (!rIndex.isUnique() || rPage.IsLeaf())
        rStream << (sal_uInt32)aKey.nRecord; // schluessel
    else
        rStream << (sal_uInt32)0;   // schluessel

    if (rIndex.getHeader().db_keytype) // double
    {
        if (aKey.getValue().isNull())
        {
            memset(aNodeData.aData,0,rIndex.getHeader().db_keylen);
            rStream.Write((sal_uInt8*)aNodeData.aData,rIndex.getHeader().db_keylen);
        }
        else
            rStream << (double) aKey.getValue();
    }
    else
    {
        memset(aNodeData.aData,0x20,rIndex.getHeader().db_keylen);
        if (!aKey.getValue().isNull())
        {
            ::rtl::OUString sValue = aKey.getValue();
            ByteString aText(sValue.getStr(), rIndex.m_pTable->getConnection()->getTextEncoding());
            strncpy(aNodeData.aData,aText.GetBuffer(),std::min(rIndex.getHeader().db_keylen, aText.Len()));
        }
        rStream.Write((sal_uInt8*)aNodeData.aData,rIndex.getHeader().db_keylen);
    }
    rStream << aChild;
}


//------------------------------------------------------------------
ONDXPagePtr& ONDXNode::GetChild(ODbaseIndex* pIndex, ONDXPage* pParent)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXNode::GetChild" );
    if (!aChild.Is() && pIndex)
    {
        aChild = pIndex->CreatePage(aChild.GetPagePos(),pParent,aChild.HasPage());
    }
    return aChild;
}

//==================================================================
// ONDXKey
//==================================================================
//------------------------------------------------------------------
sal_Bool ONDXKey::IsText(sal_Int32 eType)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXKey::IsText" );
    return eType == DataType::VARCHAR || eType == DataType::CHAR;
}

//------------------------------------------------------------------
StringCompare ONDXKey::Compare(const ONDXKey& rKey) const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXKey::Compare" );
    //  DBG_ASSERT(is(), "Falscher Indexzugriff");
    StringCompare eResult;

    if (getValue().isNull())
    {
        if (rKey.getValue().isNull() || (rKey.IsText(getDBType()) && !rKey.getValue().getString().getLength()))
            eResult = COMPARE_EQUAL;
        else
            eResult = COMPARE_LESS;
    }
    else if (rKey.getValue().isNull())
    {
        if (getValue().isNull() || (IsText(getDBType()) && !getValue().getString().getLength()))
            eResult = COMPARE_EQUAL;
        else
            eResult = COMPARE_GREATER;
    }
    else if (IsText(getDBType()))
    {
        sal_Int32 nRes = getValue().getString().compareTo(rKey.getValue());
        eResult = (nRes > 0) ? COMPARE_GREATER : (nRes == 0) ? COMPARE_EQUAL : COMPARE_LESS;
    }
    else
    {
        double m = getValue(),n = rKey.getValue();
        eResult = (m > n) ? COMPARE_GREATER : (n == m) ? COMPARE_EQUAL : COMPARE_LESS;
    }

    // Record vergleich, wenn Index !Unique
    if (eResult == COMPARE_EQUAL && nRecord && rKey.nRecord)
        eResult = (nRecord > rKey.nRecord) ? COMPARE_GREATER :
                  (nRecord == rKey.nRecord) ? COMPARE_EQUAL : COMPARE_LESS;

    return eResult;
}
// -----------------------------------------------------------------------------
void ONDXKey::setValue(const ORowSetValue& _rVal)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXKey::setValue" );
    xValue = _rVal;
}
// -----------------------------------------------------------------------------
const ORowSetValue& ONDXKey::getValue() const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXKey::getValue" );
    return xValue;
}
// -----------------------------------------------------------------------------
SvStream& connectivity::dbase::operator >> (SvStream &rStream, ONDXPagePtr& rPage)
{
    rStream >> rPage.nPagePos;
    return rStream;
}
// -----------------------------------------------------------------------------
SvStream& connectivity::dbase::operator << (SvStream &rStream, const ONDXPagePtr& rPage)
{
    rStream << rPage.nPagePos;
    return rStream;
}
// -----------------------------------------------------------------------------
//==================================================================
// ONDXPagePtr
//==================================================================
//------------------------------------------------------------------
ONDXPagePtr::ONDXPagePtr(const ONDXPagePtr& rRef)
              :ONDXPageRef(rRef)
              ,nPagePos(rRef.nPagePos)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPagePtr::ONDXPagePtr" );
}

//------------------------------------------------------------------
ONDXPagePtr::ONDXPagePtr(ONDXPage* pRefPage)
              :ONDXPageRef(pRefPage)
              ,nPagePos(0)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPagePtr::ONDXPagePtr" );
    if (pRefPage)
        nPagePos = pRefPage->GetPagePos();
}
//------------------------------------------------------------------
ONDXPagePtr& ONDXPagePtr::operator=(const ONDXPagePtr& rRef)
{
    ONDXPageRef::operator=(rRef);
    nPagePos = rRef.nPagePos;
    return *this;
}

//------------------------------------------------------------------
ONDXPagePtr& ONDXPagePtr::operator= (ONDXPage* pRef)
{
    ONDXPageRef::operator=(pRef);
    nPagePos = (pRef) ? pRef->GetPagePos() : 0;
    return *this;
}
// -----------------------------------------------------------------------------
static sal_uInt32 nValue;
//------------------------------------------------------------------
SvStream& connectivity::dbase::operator >> (SvStream &rStream, ONDXPage& rPage)
{
    rStream.Seek(rPage.GetPagePos() * 512);
    rStream >> nValue >> rPage.aChild;
    rPage.nCount = sal_uInt16(nValue);

//  DBG_ASSERT(rPage.nCount && rPage.nCount < rPage.GetIndex().GetMaxNodes(), "Falscher Count");
    for (sal_uInt16 i = 0; i < rPage.nCount; i++)
        rPage[i].Read(rStream, rPage.GetIndex());
    return rStream;
}

//------------------------------------------------------------------
SvStream& connectivity::dbase::operator << (SvStream &rStream, const ONDXPage& rPage)
{
    // Seite existiert noch nicht
    sal_uIntPtr nSize = (rPage.GetPagePos() + 1) * 512;
    if (nSize > rStream.Seek(STREAM_SEEK_TO_END))
    {
        rStream.SetStreamSize(nSize);
        rStream.Seek(rPage.GetPagePos() * 512);

        char aEmptyData[512];
        memset(aEmptyData,0x00,512);
        rStream.Write((sal_uInt8*)aEmptyData,512);
    }
    sal_uIntPtr nCurrentPos = rStream.Seek(rPage.GetPagePos() * 512);
    OSL_UNUSED( nCurrentPos );

    nValue = rPage.nCount;
    rStream << nValue << rPage.aChild;

    sal_uInt16 i = 0;
    for (; i < rPage.nCount; i++)
        rPage[i].Write(rStream, rPage);

    // check if we have to fill the stream with '\0'
    if(i < rPage.rIndex.getHeader().db_maxkeys)
    {
        sal_uIntPtr nTell = rStream.Tell() % 512;
        sal_uInt16 nBufferSize = rStream.GetBufferSize();
        sal_uIntPtr nSize = nBufferSize - nTell;
        if ( nSize <= nBufferSize )
        {
            char* pEmptyData = new char[nSize];
            memset(pEmptyData,0x00,nSize);
            rStream.Write((sal_uInt8*)pEmptyData,nSize);
            rStream.Seek(nTell);
            delete [] pEmptyData;
        }
    }
    return rStream;
}
// -----------------------------------------------------------------------------
#if OSL_DEBUG_LEVEL > 1
//------------------------------------------------------------------
void ONDXPage::PrintPage()
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPage::PrintPage" );
    DBG_TRACE4("\nSDB: -----------Page: %d  Parent: %d  Count: %d  Child: %d-----",
        nPagePos, HasParent() ? aParent->GetPagePos() : 0 ,nCount, aChild.GetPagePos());

    for (sal_uInt16 i = 0; i < nCount; i++)
    {
        ONDXNode rNode = (*this)[i];
        ONDXKey&  rKey = rNode.GetKey();
        if (!IsLeaf())
            rNode.GetChild(&rIndex, this);

        if (rKey.getValue().isNull())
        {
            DBG_TRACE2("SDB: [%d,NULL,%d]",rKey.GetRecord(), rNode.GetChild().GetPagePos());
        }
        else if (rIndex.getHeader().db_keytype)
        {
            DBG_TRACE3("SDB: [%d,%f,%d]",rKey.GetRecord(), rKey.getValue().getDouble(),rNode.GetChild().GetPagePos());
        }
        else
        {
            DBG_TRACE3("SDB: [%d,%s,%d]",rKey.GetRecord(), (const char* )ByteString(rKey.getValue().getString().getStr(), rIndex.m_pTable->getConnection()->getTextEncoding()).GetBuffer(),rNode.GetChild().GetPagePos());
        }
    }
    DBG_TRACE("SDB: -----------------------------------------------\n");
    if (!IsLeaf())
    {
#if OSL_DEBUG_LEVEL > 1
        GetChild(&rIndex)->PrintPage();
        for (sal_uInt16 i = 0; i < nCount; i++)
        {
            ONDXNode rNode = (*this)[i];
            rNode.GetChild(&rIndex,this)->PrintPage();
        }
#endif
    }
    DBG_TRACE("SDB: ===============================================\n");
}
#endif
// -----------------------------------------------------------------------------
sal_Bool ONDXPage::IsFull() const
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPage::IsFull" );
    return Count() == rIndex.getHeader().db_maxkeys;
}
// -----------------------------------------------------------------------------
//------------------------------------------------------------------
sal_uInt16 ONDXPage::Search(const ONDXKey& rSearch)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPage::Search" );
    // binare Suche spaeter
    sal_uInt16 i = 0xFFFF;
    while (++i < Count())
        if ((*this)[i].GetKey() == rSearch)
            break;

    return (i < Count()) ? i : NODE_NOTFOUND;
}

//------------------------------------------------------------------
sal_uInt16 ONDXPage::Search(const ONDXPage* pPage)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPage::Search" );
    sal_uInt16 i = 0xFFFF;
    while (++i < Count())
        if (((*this)[i]).GetChild() == pPage)
            break;

    // wenn nicht gefunden, dann wird davon ausgegangen, dass die Seite selbst
    // auf die Page zeigt
    return (i < Count()) ? i : NODE_NOTFOUND;
}
// -----------------------------------------------------------------------------
// laeuft rekursiv
void ONDXPage::SearchAndReplace(const ONDXKey& rSearch,
                                  ONDXKey& rReplace)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPage::SearchAndReplace" );
    OSL_ENSURE(rSearch != rReplace,"Invalid here:rSearch == rReplace");
    if (rSearch != rReplace)
    {
        sal_uInt16 nPos = NODE_NOTFOUND;
        ONDXPage* pPage = this;

        while (pPage && (nPos = pPage->Search(rSearch)) == NODE_NOTFOUND)
            pPage = pPage->aParent;

        if (pPage)
        {
            (*pPage)[nPos].GetKey() = rReplace;
            pPage->SetModified(sal_True);
        }
    }
}
// -----------------------------------------------------------------------------
ONDXNode& ONDXPage::operator[] (sal_uInt16 nPos)
{
    DBG_ASSERT(nCount > nPos, "falscher Indexzugriff");
    return ppNodes[nPos];
}

//------------------------------------------------------------------
const ONDXNode& ONDXPage::operator[] (sal_uInt16 nPos) const
{
    DBG_ASSERT(nCount > nPos, "falscher Indexzugriff");
    return ppNodes[nPos];
}
// -----------------------------------------------------------------------------
void ONDXPage::Remove(sal_uInt16 nPos)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbase", "Ocke.Janssen@sun.com", "ONDXPage::Remove" );
    DBG_ASSERT(nCount > nPos, "falscher Indexzugriff");

    for (sal_uInt16 i = nPos; i < (nCount-1); i++)
        (*this)[i] = (*this)[i+1];

    nCount--;
    bModified = sal_True;
}
// -----------------------------------------------------------------------------