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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <sal/config.h>
#include "Clob.hxx"
#include "Blob.hxx"
#include <connectivity/CommonTools.hxx>
#include <connectivity/dbexception.hxx>
using namespace ::connectivity::firebird;
using namespace ::osl;
using namespace ::com::sun::star;
using namespace ::com::sun::star::io;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::uno;
Clob::Clob(isc_db_handle* pDatabaseHandle,
isc_tr_handle* pTransactionHandle,
ISC_QUAD const & aBlobID):
Clob_BASE(m_aMutex),
m_aBlob(new connectivity::firebird::Blob(pDatabaseHandle, pTransactionHandle, aBlobID)),
m_nCharCount(-1)
{
}
void SAL_CALL Clob::disposing()
{
m_aBlob->dispose();
m_aBlob.clear();
Clob_BASE::disposing();
}
sal_Int64 SAL_CALL Clob::length()
{
MutexGuard aGuard(m_aMutex);
checkDisposed(Clob_BASE::rBHelper.bDisposed);
if( m_nCharCount >= 0 )
return m_nCharCount;
m_nCharCount = 0;
// Read each segment, and calculate it's size by interpreting it as a
// character stream. Assume that no characters are split by the segments.
bool bLastSegmRead = false;
std::vector<char> aSegmentBytes;
do
{
bLastSegmRead = m_aBlob->readOneSegment( aSegmentBytes );
OUString sSegment(aSegmentBytes.data(), aSegmentBytes.size(), RTL_TEXTENCODING_UTF8);
if( !bLastSegmRead)
m_nCharCount += sSegment.getLength();
}while( !bLastSegmRead );
m_aBlob->closeInput(); // reset position
return m_nCharCount;
}
OUString SAL_CALL Clob::getSubString(sal_Int64 nPosition,
sal_Int32 nLength)
{
if (nPosition < 1) // XClob is indexed from 1
throw lang::IllegalArgumentException("nPosition < 1", *this, 0);
--nPosition; // make 0-based
if (nLength < 0)
throw lang::IllegalArgumentException("nLength < 0", *this, 0);
MutexGuard aGuard(m_aMutex);
checkDisposed(Clob_BASE::rBHelper.bDisposed);
// TODO do not reset position if it is not necessary
m_aBlob->closeInput(); // reset position
OUStringBuffer sSegmentBuffer;
std::vector<char> aSegmentBytes;
for (;;)
{
bool bLastRead = m_aBlob->readOneSegment( aSegmentBytes );
// TODO: handle possible case of split UTF-8 character
OUString sSegment(aSegmentBytes.data(), aSegmentBytes.size(), RTL_TEXTENCODING_UTF8);
// skip irrelevant parts
if (sSegment.getLength() < nPosition)
{
if (bLastRead)
throw lang::IllegalArgumentException("nPosition out of range", *this, 0);
nPosition -= sSegment.getLength();
continue;
}
// Getting here for the first time, nPosition may be > 0, meaning copy start offset.
// This also handles sSegment.getLength() == nPosition case, including nLength == 0.
const sal_Int32 nCharsToCopy = std::min<sal_Int32>(sSegment.getLength() - nPosition,
nLength - sSegmentBuffer.getLength());
sSegmentBuffer.append(sSegment.subView(nPosition, nCharsToCopy));
if (sSegmentBuffer.getLength() == nLength)
return sSegmentBuffer.makeStringAndClear();
assert(sSegmentBuffer.getLength() < nLength);
if (bLastRead)
throw lang::IllegalArgumentException("out of range", *this, 0);
nPosition = 0; // No offset after first append
}
}
uno::Reference< XInputStream > SAL_CALL Clob::getCharacterStream()
{
MutexGuard aGuard(m_aMutex);
checkDisposed(Clob_BASE::rBHelper.bDisposed);
return m_aBlob->getBinaryStream();
}
sal_Int64 SAL_CALL Clob::position(const OUString& /*rPattern*/,
sal_Int32 /*nStart*/)
{
::dbtools::throwFeatureNotImplementedSQLException("Clob::position", *this);
return 0;
}
sal_Int64 SAL_CALL Clob::positionOfClob(const Reference <XClob >& /*rPattern*/,
sal_Int64 /*aStart*/)
{
::dbtools::throwFeatureNotImplementedSQLException("Clob::positionOfClob", *this);
return 0;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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