| /************************************************************** |
| * |
| * 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 "hsqldb/HView.hxx" |
| #include "hsqldb/HTools.hxx" |
| |
| #include "propertyids.hxx" |
| |
| #include "connectivity/dbexception.hxx" |
| #include "connectivity/dbtools.hxx" |
| |
| /** === begin UNO includes === **/ |
| #include <com/sun/star/lang/WrappedTargetException.hpp> |
| #include <com/sun/star/lang/DisposedException.hpp> |
| #include <com/sun/star/sdbc/XRow.hpp> |
| /** === end UNO includes === **/ |
| |
| #include <cppuhelper/exc_hlp.hxx> |
| #include <tools/diagnose_ex.h> |
| #include <unotools/sharedunocomponent.hxx> |
| |
| //........................................................................ |
| namespace connectivity { namespace hsqldb |
| { |
| //........................................................................ |
| |
| /** === begin UNO using === **/ |
| using ::com::sun::star::uno::Reference; |
| using ::com::sun::star::uno::UNO_QUERY; |
| using ::com::sun::star::uno::UNO_QUERY_THROW; |
| using ::com::sun::star::uno::Exception; |
| using ::com::sun::star::uno::RuntimeException; |
| using ::com::sun::star::uno::Any; |
| using ::com::sun::star::uno::makeAny; |
| using ::com::sun::star::sdbc::XDatabaseMetaData; |
| using ::com::sun::star::sdbc::SQLException; |
| using ::com::sun::star::sdbc::XConnection; |
| using ::com::sun::star::lang::WrappedTargetException; |
| using ::com::sun::star::sdbc::XResultSet; |
| using ::com::sun::star::sdbc::XStatement; |
| using ::com::sun::star::lang::DisposedException; |
| using ::com::sun::star::sdbc::XRow; |
| /** === end UNO using === **/ |
| |
| //==================================================================== |
| //= HView |
| //==================================================================== |
| //-------------------------------------------------------------------- |
| HView::HView( const Reference< XConnection >& _rxConnection, sal_Bool _bCaseSensitive, |
| const ::rtl::OUString& _rSchemaName, const ::rtl::OUString& _rName ) |
| :HView_Base( _bCaseSensitive, _rName, _rxConnection->getMetaData(), 0, ::rtl::OUString(), _rSchemaName, ::rtl::OUString() ) |
| ,m_xConnection( _rxConnection ) |
| { |
| } |
| |
| //-------------------------------------------------------------------- |
| HView::~HView() |
| { |
| } |
| |
| //-------------------------------------------------------------------- |
| IMPLEMENT_FORWARD_XINTERFACE2( HView, HView_Base, HView_IBASE ) |
| IMPLEMENT_FORWARD_XTYPEPROVIDER2( HView, HView_Base, HView_IBASE ) |
| |
| //-------------------------------------------------------------------- |
| void SAL_CALL HView::alterCommand( const ::rtl::OUString& _rNewCommand ) throw (SQLException, RuntimeException) |
| { |
| // not really atomic ... as long as we do not have something like |
| // ALTER VIEW <name> TO <command> |
| // in HSQL, we need to do it this way ... |
| // |
| // I can imagine scenarios where this fails, e.g. when dropping the view |
| // succeedes, re-creating it fails, some other thread alters a table which |
| // the view was based on, and then we try to restore the view with the |
| // original command, which then fails, too. |
| // |
| // However, there's not much chance to prevent this kind of errors without |
| // backend support. |
| |
| ::rtl::OUString sQualifiedName( ::dbtools::composeTableName( |
| m_xMetaData, m_CatalogName, m_SchemaName, m_Name, true, ::dbtools::eInDataManipulation ) ); |
| |
| ::utl::SharedUNOComponent< XStatement > xStatement; xStatement.set( m_xConnection->createStatement(), UNO_QUERY_THROW ); |
| |
| // create a statement which can be used to re-create the original view, in case |
| // dropping it succeeds, but creating it with a new statement fails |
| ::rtl::OUStringBuffer aRestoreCommand; |
| aRestoreCommand.appendAscii( "CREATE VIEW " ); |
| aRestoreCommand.append ( sQualifiedName ); |
| aRestoreCommand.appendAscii( " AS " ); |
| aRestoreCommand.append ( impl_getCommand_throw( true ) ); |
| ::rtl::OUString sRestoreCommand( aRestoreCommand.makeStringAndClear() ); |
| |
| bool bDropSucceeded( false ); |
| try |
| { |
| // drop the existing view |
| ::rtl::OUStringBuffer aCommand; |
| aCommand.appendAscii( "DROP VIEW " ); |
| aCommand.append ( sQualifiedName ); |
| xStatement->execute( aCommand.makeStringAndClear() ); |
| bDropSucceeded = true; |
| |
| // create a new one with the same name |
| aCommand.appendAscii( "CREATE VIEW " ); |
| aCommand.append ( sQualifiedName ); |
| aCommand.appendAscii( " AS " ); |
| aCommand.append ( _rNewCommand ); |
| xStatement->execute( aCommand.makeStringAndClear() ); |
| } |
| catch( const SQLException& ) |
| { |
| if ( bDropSucceeded ) |
| // drop succeeded, but creation failed -> re-create the view with the original |
| // statemnet |
| xStatement->execute( sRestoreCommand ); |
| throw; |
| } |
| catch( const RuntimeException& ) |
| { |
| if ( bDropSucceeded ) |
| xStatement->execute( sRestoreCommand ); |
| throw; |
| } |
| catch( const Exception& ) |
| { |
| if ( bDropSucceeded ) |
| xStatement->execute( sRestoreCommand ); |
| DBG_UNHANDLED_EXCEPTION(); |
| } |
| } |
| |
| //-------------------------------------------------------------------- |
| void SAL_CALL HView::getFastPropertyValue( Any& _rValue, sal_Int32 _nHandle ) const |
| { |
| if ( _nHandle == PROPERTY_ID_COMMAND ) |
| { |
| // retrieve the very current command, don't rely on the base classes cached value |
| // (which we initialized empty, anyway) |
| _rValue <<= impl_getCommand_throw( false ); |
| return; |
| } |
| |
| HView_Base::getFastPropertyValue( _rValue, _nHandle ); |
| } |
| |
| //-------------------------------------------------------------------- |
| ::rtl::OUString HView::impl_getCommand_throw( bool _bAllowSQLException ) const |
| { |
| ::rtl::OUString sCommand; |
| |
| try |
| { |
| ::rtl::OUStringBuffer aCommand; |
| aCommand.appendAscii( "SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.SYSTEM_VIEWS " ); |
| HTools::appendTableFilterCrit( aCommand, m_CatalogName, m_SchemaName, m_Name, false ); |
| ::utl::SharedUNOComponent< XStatement > xStatement; xStatement.set( m_xConnection->createStatement(), UNO_QUERY_THROW ); |
| Reference< XResultSet > xResult( xStatement->executeQuery( aCommand.makeStringAndClear() ), UNO_QUERY_THROW ); |
| if ( !xResult->next() ) |
| { |
| // hmm. There is no view view the name as we know it. Can only mean some other instance |
| // dropped this view meanwhile ... |
| throw DisposedException(); |
| } |
| |
| Reference< XRow > xRow( xResult, UNO_QUERY_THROW ); |
| sCommand = xRow->getString( 1 ); |
| } |
| catch( const RuntimeException& ) { throw; } |
| catch( const SQLException& e ) |
| { |
| if ( _bAllowSQLException ) |
| throw; |
| throw WrappedTargetException( e.Message, static_cast< XAlterView* >( const_cast< HView* >( this ) ), ::cppu::getCaughtException() ); |
| } |
| catch( const Exception& ) |
| { |
| DBG_UNHANDLED_EXCEPTION(); |
| } |
| |
| return sCommand; |
| } |
| |
| //........................................................................ |
| } } // namespace connectivity::hsqldb |
| //........................................................................ |
