libreoffice/svx/source/form/dbtoolsclient.cxx

/* -*- 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */

#include <com/sun/star/sdbc/XConnection.hpp>
#include <com/sun/star/sdbc/XDataSource.hpp>
#include <com/sun/star/util/XNumberFormatsSupplier.hpp>
#include <com/sun/star/sdb/SQLContext.hpp>
#include "svx/dbtoolsclient.hxx"
#include <osl/diagnose.h>
#include <rtl/instance.hxx>
#include <connectivity/formattedcolumnvalue.hxx>


namespace svxform
{


    using namespace ::connectivity::simple;
    using namespace ::com::sun::star::sdbc;
    using namespace ::com::sun::star::lang;
    using namespace ::com::sun::star::util;
    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::beans;
    using namespace ::com::sun::star::sdb;
    using namespace ::com::sun::star::container;


    //= ODbtoolsClient


    namespace
    {
        struct theODbtoolsClientMutex : public rtl::Static< osl::Mutex, theODbtoolsClientMutex> {};
    }

    sal_Int32       ODbtoolsClient::s_nClients = 0;
    oslModule       ODbtoolsClient::s_hDbtoolsModule = NULL;
    createDataAccessToolsFactoryFunction
                    ODbtoolsClient::s_pFactoryCreationFunc = NULL;


    ODbtoolsClient::ODbtoolsClient()
    {
        m_bCreateAlready = false;
    }


    bool ODbtoolsClient::ensureLoaded() const
    {
        if ( !m_bCreateAlready )
        {
            m_bCreateAlready = true;

            registerClient();
            if ( s_pFactoryCreationFunc )
            {   // loading the lib succeeded
                void* pUntypedFactory = (*s_pFactoryCreationFunc)();
                IDataAccessToolsFactory* pDBTFactory = static_cast< IDataAccessToolsFactory* >( pUntypedFactory );
                OSL_ENSURE( pDBTFactory, "ODbtoolsClient::ODbtoolsClient: no factory returned!" );
                if ( pDBTFactory )
                {
                    m_xDataAccessFactory = pDBTFactory;
                    // by definition, the factory was acquired once
                    m_xDataAccessFactory->release();
                }
            }
        }
        return m_xDataAccessFactory.is();
    }


    ODbtoolsClient::~ODbtoolsClient()
    {
        // clear the factory _before_ revoking the client
        // (the revocation may unload the DBT lib)
        m_xDataAccessFactory = NULL;
        // revoke the client
        if ( m_bCreateAlready )
            revokeClient();
    }

#if HAVE_FEATURE_DESKTOP
#ifndef DISABLE_DYNLOADING
    extern "C" { static void SAL_CALL thisModule() {} }
#else
    extern "C" void * createDataAccessToolsFactory();
#endif
#endif

    void ODbtoolsClient::registerClient()
    {
        ::osl::MutexGuard aGuard(theODbtoolsClientMutex::get());
        if (1 == ++s_nClients)
        {
            OSL_ENSURE(NULL == s_hDbtoolsModule, "ODbtoolsClient::registerClient: inconsistence: already have a module!");
            OSL_ENSURE(NULL == s_pFactoryCreationFunc, "ODbtoolsClient::registerClient: inconsistence: already have a factory function!");

#if HAVE_FEATURE_DESKTOP
#ifndef DISABLE_DYNLOADING

            // load the dbtools library
            s_hDbtoolsModule = osl_loadModuleRelative(
                &thisModule, OUString(DBTOOLS_DLL_NAME).pData, 0);
            OSL_ENSURE(NULL != s_hDbtoolsModule, "ODbtoolsClient::registerClient: could not load the dbtools library!");
            if (NULL != s_hDbtoolsModule)
            {
                // get the symbol for the method creating the factory
                const OUString sFactoryCreationFunc( "createDataAccessToolsFactory" );
                //  reinterpret_cast<createDataAccessToolsFactoryFunction>
                s_pFactoryCreationFunc = reinterpret_cast<createDataAccessToolsFactoryFunction>(
                    osl_getFunctionSymbol(s_hDbtoolsModule, sFactoryCreationFunc.pData));

                if (NULL == s_pFactoryCreationFunc)
                {   // did not find the symbol
                    OSL_FAIL("ODbtoolsClient::registerClient: could not find the symbol for creating the factory!");
                    osl_unloadModule(s_hDbtoolsModule);
                    s_hDbtoolsModule = NULL;
                }
            }
#else
            s_pFactoryCreationFunc = createDataAccessToolsFactory;
#endif
#endif
        }
    }


    void ODbtoolsClient::revokeClient()
    {
        ::osl::MutexGuard aGuard(theODbtoolsClientMutex::get());
        if (0 == --s_nClients)
        {
#ifndef DISABLE_DYNLOADING
            s_pFactoryCreationFunc = NULL;
            if (s_hDbtoolsModule)
                osl_unloadModule(s_hDbtoolsModule);
#endif
            s_hDbtoolsModule = NULL;
        }

        OSL_ENSURE(s_nClients >= 0,"Illegall call of revokeClient()");
    }

    OStaticDataAccessTools::OStaticDataAccessTools()
    {
    }



    bool OStaticDataAccessTools::ensureLoaded() const
    {
        if ( !ODbtoolsClient::ensureLoaded() )
            return false;
         m_xDataAccessTools = getFactory()->getDataAccessTools();
        return m_xDataAccessTools.is();
    }


    Reference< XNumberFormatsSupplier > OStaticDataAccessTools::getNumberFormats(const Reference< XConnection>& _rxConn, bool _bAllowDefault) const
    {
        Reference< XNumberFormatsSupplier > xReturn;
        if ( ensureLoaded() )
            xReturn = m_xDataAccessTools->getNumberFormats(_rxConn, _bAllowDefault);
        return xReturn;
    }


    sal_Int32 OStaticDataAccessTools::getDefaultNumberFormat( const Reference< XPropertySet >& _xColumn, const Reference< XNumberFormatTypes >& _xTypes, const css::lang::Locale& _rLocale )
    {
        sal_Int32 nReturn = 0;
        if ( ensureLoaded() )
            nReturn = m_xDataAccessTools->getDefaultNumberFormat( _xColumn, _xTypes, _rLocale );
        return nReturn;
    }


    Reference< XConnection> OStaticDataAccessTools::getConnection_withFeedback(const OUString& _rDataSourceName,
        const OUString& _rUser, const OUString& _rPwd, const Reference<XComponentContext>& _rxContext) const
    {
        Reference< XConnection > xReturn;
        if ( ensureLoaded() )
            xReturn = m_xDataAccessTools->getConnection_withFeedback(_rDataSourceName, _rUser, _rPwd, _rxContext);
        return xReturn;
    }


    Reference< XConnection > OStaticDataAccessTools::connectRowset( const Reference< XRowSet >& _rxRowSet,
        const Reference< XComponentContext >& _rxContext, bool _bSetAsActiveConnection ) const
    {
        Reference< XConnection > xReturn;
        if ( ensureLoaded() )
            xReturn = m_xDataAccessTools->connectRowset( _rxRowSet, _rxContext, _bSetAsActiveConnection );
        return xReturn;
    }


    Reference< XConnection > OStaticDataAccessTools::getRowSetConnection(const Reference< XRowSet >& _rxRowSet) const
    {
        Reference< XConnection > xReturn;
        if ( ensureLoaded() )
            xReturn = m_xDataAccessTools->getRowSetConnection(_rxRowSet);
        return xReturn;
    }

    void OStaticDataAccessTools::TransferFormComponentProperties(const Reference< XPropertySet>& _rxOld,
        const Reference< XPropertySet>& _rxNew, const css::lang::Locale& _rLocale) const
    {
        if ( ensureLoaded() )
            m_xDataAccessTools->TransferFormComponentProperties(_rxOld, _rxNew, _rLocale);
    }

    Reference< XDataSource > OStaticDataAccessTools::getDataSource( const OUString& _rsRegisteredName, const Reference< XComponentContext>& _rxContext ) const
    {
        Reference< XDataSource > xReturn;
        if ( ensureLoaded() )
            xReturn = m_xDataAccessTools->getDataSource(_rsRegisteredName,_rxContext);
        return xReturn;
    }

    bool OStaticDataAccessTools::canInsert(const Reference< XPropertySet>& _rxCursorSet) const
    {
        bool bRet = false;
        if ( ensureLoaded() )
            bRet = m_xDataAccessTools->canInsert( _rxCursorSet );
        return bRet;
    }

    bool OStaticDataAccessTools::canUpdate(const Reference< XPropertySet>& _rxCursorSet) const
    {
        bool bRet = false;
        if ( ensureLoaded() )
            bRet = m_xDataAccessTools->canUpdate( _rxCursorSet );
        return bRet;
    }


    Reference< XNameAccess > OStaticDataAccessTools::getFieldsByCommandDescriptor( const Reference< XConnection >& _rxConnection,
        const sal_Int32 _nCommandType, const OUString& _rCommand,
            Reference< XComponent >& _rxKeepFieldsAlive, ::dbtools::SQLExceptionInfo* _pErrorInfo )
    {
        Reference< XNameAccess > aFields;
        if ( ensureLoaded() )
            aFields = m_xDataAccessTools->getFieldsByCommandDescriptor( _rxConnection, _nCommandType,
                _rCommand, _rxKeepFieldsAlive, _pErrorInfo );

        return aFields;
    }


    bool OStaticDataAccessTools::isEmbeddedInDatabase( const Reference< XInterface >& _rxComponent, Reference< XConnection >& _rxActualConnection )
    {
        bool bReturn = false;
        if ( ensureLoaded() )
            bReturn = m_xDataAccessTools->isEmbeddedInDatabase( _rxComponent, _rxActualConnection );
        return bReturn;
    }


    bool OStaticDataAccessTools::isEmbeddedInDatabase( const Reference< XInterface >& _rxComponent )
    {
        bool bReturn = false;
        if ( ensureLoaded() )
        {
            Reference< XConnection > xDummy;
            bReturn = m_xDataAccessTools->isEmbeddedInDatabase( _rxComponent, xDummy );
        }
        return bReturn;
    }

    DBToolsObjectFactory::DBToolsObjectFactory()
    {
    }


    DBToolsObjectFactory::~DBToolsObjectFactory()
    {
    }


    ::std::unique_ptr< ::dbtools::FormattedColumnValue > DBToolsObjectFactory::createFormattedColumnValue(
        const Reference<XComponentContext>& _rContext, const Reference< XRowSet >& _rxRowSet, const Reference< XPropertySet >& _rxColumn )
    {
        ::std::unique_ptr< ::dbtools::FormattedColumnValue > pValue;
        if ( ensureLoaded() )
            pValue = getFactory()->createFormattedColumnValue( _rContext, _rxRowSet, _rxColumn );
        return pValue;
    }


}   // namespace svxform



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