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Diffstat (limited to 'connectivity/source/commontools/statementcomposer.cxx')
| -rw-r--r-- | connectivity/source/commontools/statementcomposer.cxx | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/connectivity/source/commontools/statementcomposer.cxx b/connectivity/source/commontools/statementcomposer.cxx new file mode 100644 index 000000000..01f20e9c1 --- /dev/null +++ b/connectivity/source/commontools/statementcomposer.cxx @@ -0,0 +1,304 @@ +/* -*- 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 <connectivity/statementcomposer.hxx> + +#include <connectivity/dbtools.hxx> + +#include <com/sun/star/sdb/CommandType.hpp> +#include <com/sun/star/lang/NullPointerException.hpp> +#include <com/sun/star/lang/XComponent.hpp> +#include <com/sun/star/sdb/XQueriesSupplier.hpp> +#include <com/sun/star/sdbc/SQLException.hpp> +#include <com/sun/star/lang/XMultiServiceFactory.hpp> +#include <com/sun/star/sdb/XSingleSelectQueryComposer.hpp> +#include <com/sun/star/sdbc/XConnection.hpp> + +#include <unotools/sharedunocomponent.hxx> +#include <tools/diagnose_ex.h> +#include <comphelper/property.hxx> + + +namespace dbtools +{ + + + using ::com::sun::star::uno::Reference; + using ::com::sun::star::sdbc::XConnection; + using ::com::sun::star::sdb::XSingleSelectQueryComposer; + using ::com::sun::star::lang::NullPointerException; + using ::com::sun::star::uno::Exception; + using ::com::sun::star::lang::XComponent; + using ::com::sun::star::uno::UNO_QUERY_THROW; + using ::com::sun::star::sdb::XQueriesSupplier; + using ::com::sun::star::container::XNameAccess; + using ::com::sun::star::beans::XPropertySet; + using ::com::sun::star::lang::XMultiServiceFactory; + using ::com::sun::star::sdbc::SQLException; + + namespace CommandType = ::com::sun::star::sdb::CommandType; + + struct StatementComposer_Data + { + const Reference< XConnection > xConnection; + Reference< XSingleSelectQueryComposer > xComposer; + OUString sCommand; + OUString sFilter; + OUString sHavingClause; + OUString sOrder; + sal_Int32 nCommandType; + bool bEscapeProcessing; + bool bComposerDirty; + bool bDisposeComposer; + + explicit StatementComposer_Data( const Reference< XConnection >& _rxConnection ) + :xConnection( _rxConnection ) + ,sCommand() + ,sFilter() + ,sOrder() + ,nCommandType( CommandType::COMMAND ) + ,bEscapeProcessing( true ) + ,bComposerDirty( true ) + ,bDisposeComposer( true ) + { + if ( !_rxConnection.is() ) + throw NullPointerException(); + } + }; + + + namespace + { + + void lcl_resetComposer( StatementComposer_Data& _rData ) + { + if ( _rData.bDisposeComposer && _rData.xComposer.is() ) + { + try + { + Reference< XComponent > xComposerComponent( _rData.xComposer, UNO_QUERY_THROW ); + xComposerComponent->dispose(); + } + catch( const Exception& ) + { + DBG_UNHANDLED_EXCEPTION("connectivity.commontools"); + } + } + _rData.xComposer.clear(); + } + + + bool lcl_ensureUpToDateComposer_nothrow( StatementComposer_Data& _rData ) + { + if ( !_rData.bComposerDirty ) + return _rData.xComposer.is(); + lcl_resetComposer( _rData ); + + try + { + OUString sStatement; + switch ( _rData.nCommandType ) + { + case CommandType::COMMAND: + if ( _rData.bEscapeProcessing ) + sStatement = _rData.sCommand; + // (in case of no escape processing we assume a not parseable statement) + break; + + case CommandType::TABLE: + { + if ( _rData.sCommand.isEmpty() ) + break; + + sStatement = "SELECT * FROM "; + + OUString sCatalog, sSchema, sTable; + qualifiedNameComponents( _rData.xConnection->getMetaData(), _rData.sCommand, sCatalog, sSchema, sTable, EComposeRule::InDataManipulation ); + + sStatement += composeTableNameForSelect( _rData.xConnection, sCatalog, sSchema, sTable ); + } + break; + + case CommandType::QUERY: + { + // ask the connection for the query + Reference< XQueriesSupplier > xSupplyQueries( _rData.xConnection, UNO_QUERY_THROW ); + Reference< XNameAccess > xQueries( xSupplyQueries->getQueries(), css::uno::UNO_SET_THROW ); + + if ( !xQueries->hasByName( _rData.sCommand ) ) + break; + + Reference< XPropertySet > xQuery( xQueries->getByName( _rData.sCommand ), UNO_QUERY_THROW ); + + // a native query ? + bool bQueryEscapeProcessing = false; + xQuery->getPropertyValue("EscapeProcessing") >>= bQueryEscapeProcessing; + if ( !bQueryEscapeProcessing ) + break; + + // the command used by the query + xQuery->getPropertyValue("Command") >>= sStatement; + if ( sStatement.isEmpty() ) + break; + + // use a composer to build a statement from the query filter/order props + Reference< XMultiServiceFactory > xFactory( _rData.xConnection, UNO_QUERY_THROW ); + ::utl::SharedUNOComponent< XSingleSelectQueryComposer > xComposer; + xComposer.set( + xFactory->createInstance("com.sun.star.sdb.SingleSelectQueryComposer"), + UNO_QUERY_THROW + ); + + // the "basic" statement + xComposer->setElementaryQuery( sStatement ); + + // the sort order + const OUString sPropOrder( "Order" ); + if ( ::comphelper::hasProperty( sPropOrder, xQuery ) ) + { + OUString sOrder; + OSL_VERIFY( xQuery->getPropertyValue( sPropOrder ) >>= sOrder ); + xComposer->setOrder( sOrder ); + } + + // the filter + bool bApplyFilter = true; + const OUString sPropApply( "ApplyFilter" ); + if ( ::comphelper::hasProperty( sPropApply, xQuery ) ) + { + OSL_VERIFY( xQuery->getPropertyValue( sPropApply ) >>= bApplyFilter ); + } + + if ( bApplyFilter ) + { + OUString sFilter; + OSL_VERIFY( xQuery->getPropertyValue("Filter") >>= sFilter ); + xComposer->setFilter( sFilter ); + OSL_VERIFY( xQuery->getPropertyValue("HavingClause") >>= sFilter ); + xComposer->setHavingClause( sFilter ); + } + + // the composed statement + sStatement = xComposer->getQuery(); + } + break; + + default: + OSL_FAIL("lcl_ensureUpToDateComposer_nothrow: no table, no query, no statement - what else ?!"); + break; + } + + if ( !sStatement.isEmpty() ) + { + // create a composer + Reference< XMultiServiceFactory > xFactory( _rData.xConnection, UNO_QUERY_THROW ); + Reference< XSingleSelectQueryComposer > xComposer( xFactory->createInstance("com.sun.star.sdb.SingleSelectQueryComposer"), + UNO_QUERY_THROW ); + xComposer->setElementaryQuery( sStatement ); + + // append sort/filter + xComposer->setOrder( _rData.sOrder ); + xComposer->setFilter( _rData.sFilter ); + xComposer->setHavingClause( _rData.sHavingClause ); + + sStatement = xComposer->getQuery(); + + _rData.xComposer = xComposer; + _rData.bComposerDirty = false; + } + } + catch( const SQLException& ) + { + // allowed to leave here + } + catch( const Exception& ) + { + DBG_UNHANDLED_EXCEPTION("connectivity.commontools"); + } + + return _rData.xComposer.is(); + } + } + + StatementComposer::StatementComposer( const Reference< XConnection >& _rxConnection, + const OUString& _rCommand, const sal_Int32 _nCommandType, const bool _bEscapeProcessing ) + :m_pData( new StatementComposer_Data( _rxConnection ) ) + { + OSL_PRECOND( _rxConnection.is(), "StatementComposer::StatementComposer: illegal connection!" ); + m_pData->sCommand = _rCommand; + m_pData->nCommandType = _nCommandType; + m_pData->bEscapeProcessing = _bEscapeProcessing; + } + + + StatementComposer::~StatementComposer() + { + lcl_resetComposer( *m_pData ); + } + + + void StatementComposer::setDisposeComposer( bool _bDoDispose ) + { + m_pData->bDisposeComposer = _bDoDispose; + } + + + void StatementComposer::setFilter( const OUString& _rFilter ) + { + m_pData->sFilter = _rFilter; + m_pData->bComposerDirty = true; + } + + + void StatementComposer::setHavingClause( const OUString& _rHavingClause ) + { + m_pData->sHavingClause = _rHavingClause; + m_pData->bComposerDirty = true; + } + + + void StatementComposer::setOrder( const OUString& _rOrder ) + { + m_pData->sOrder = _rOrder; + m_pData->bComposerDirty = true; + } + + + Reference< XSingleSelectQueryComposer > const & StatementComposer::getComposer() + { + lcl_ensureUpToDateComposer_nothrow( *m_pData ); + return m_pData->xComposer; + } + + + OUString StatementComposer::getQuery() + { + if ( lcl_ensureUpToDateComposer_nothrow( *m_pData ) ) + { + return m_pData->xComposer->getQuery(); + } + + return OUString(); + } + + +} // namespace dbtools + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |