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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef INCLUDED_CONNECTIVITY_SOURCE_DRIVERS_FIREBIRD_BLOB_HXX
#define INCLUDED_CONNECTIVITY_SOURCE_DRIVERS_FIREBIRD_BLOB_HXX
#include <ibase.h>
#include <cppuhelper/compbase.hxx>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/sdbc/XBlob.hpp>
namespace connectivity
{
namespace firebird
{
typedef ::cppu::WeakComponentImplHelper< css::sdbc::XBlob,
css::io::XInputStream >
Blob_BASE;
class Blob :
public Blob_BASE
{
protected:
::osl::Mutex m_aMutex;
isc_db_handle* m_pDatabaseHandle;
isc_tr_handle* m_pTransactionHandle;
// We store our own copy of the blob id as typically the statement
// manages its own blob id, and blobs are independent of a statement
// in firebird.
ISC_QUAD m_blobID;
isc_blob_handle m_blobHandle;
bool m_bBlobOpened;
sal_Int64 m_nBlobLength;
sal_uInt16 m_nMaxSegmentSize;
sal_Int64 m_nBlobPosition;
ISC_STATUS_ARRAY m_statusVector;
/// @throws css::sdbc::SQLException
void ensureBlobIsOpened();
/**
* Closes the blob and cleans up resources -- can be used to reset
* the blob if we e.g. want to read from the beginning again.
*
* @throws css::sdbc::SQLException
*/
void closeBlob();
sal_uInt16 getMaximumSegmentSize();
public:
Blob(isc_db_handle* pDatabaseHandle,
isc_tr_handle* pTransactionHandle,
ISC_QUAD const & aBlobID);
bool readOneSegment(css::uno::Sequence< sal_Int8 >& rDataOut);
// ---- XBlob ----------------------------------------------------
virtual sal_Int64 SAL_CALL
length() override;
virtual css::uno::Sequence< sal_Int8 > SAL_CALL
getBytes(sal_Int64 aPosition, sal_Int32 aLength) override;
virtual css::uno::Reference< css::io::XInputStream > SAL_CALL
getBinaryStream() override;
virtual sal_Int64 SAL_CALL
position(const css::uno::Sequence< sal_Int8 >& rPattern,
sal_Int64 aStart) override;
virtual sal_Int64 SAL_CALL
positionOfBlob(const css::uno::Reference< css::sdbc::XBlob >& rPattern,
sal_Int64 aStart) override;
// ---- XInputStream ----------------------------------------------
virtual sal_Int32 SAL_CALL
readBytes(css::uno::Sequence< sal_Int8 >& rDataOut,
sal_Int32 nBytes) override;
virtual sal_Int32 SAL_CALL
readSomeBytes(css::uno::Sequence< sal_Int8 >& rDataOut,
sal_Int32 nMaximumBytes) override;
virtual void SAL_CALL
skipBytes(sal_Int32 nBytes) override;
virtual sal_Int32 SAL_CALL
available() override;
virtual void SAL_CALL
closeInput() override;
// ---- OComponentHelper ------------------------------------------
virtual void SAL_CALL disposing() override;
};
}
}
#endif // INCLUDED_CONNECTIVITY_SOURCE_DRIVERS_FIREBIRD_BLOB_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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