LCOV - code coverage report
Current view: top level - connectivity/source/drivers/hsqldb - HView.cxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 0 63 0.0 %
Date: 2014-04-14 Functions: 0 11 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : 
      21             : #include "hsqldb/HView.hxx"
      22             : #include "hsqldb/HTools.hxx"
      23             : 
      24             : #include "propertyids.hxx"
      25             : 
      26             : #include "connectivity/dbexception.hxx"
      27             : #include "connectivity/dbtools.hxx"
      28             : 
      29             : #include <com/sun/star/lang/WrappedTargetException.hpp>
      30             : #include <com/sun/star/lang/DisposedException.hpp>
      31             : #include <com/sun/star/sdbc/XRow.hpp>
      32             : 
      33             : #include <cppuhelper/exc_hlp.hxx>
      34             : #include <tools/diagnose_ex.h>
      35             : #include <unotools/sharedunocomponent.hxx>
      36             : 
      37             : 
      38             : namespace connectivity { namespace hsqldb
      39             : {
      40             : 
      41             : 
      42             :     using ::com::sun::star::uno::Reference;
      43             :     using ::com::sun::star::uno::UNO_QUERY;
      44             :     using ::com::sun::star::uno::UNO_QUERY_THROW;
      45             :     using ::com::sun::star::uno::Exception;
      46             :     using ::com::sun::star::uno::RuntimeException;
      47             :     using ::com::sun::star::uno::Any;
      48             :     using ::com::sun::star::uno::makeAny;
      49             :     using ::com::sun::star::sdbc::XDatabaseMetaData;
      50             :     using ::com::sun::star::sdbc::SQLException;
      51             :     using ::com::sun::star::sdbc::XConnection;
      52             :     using ::com::sun::star::lang::WrappedTargetException;
      53             :     using ::com::sun::star::sdbc::XResultSet;
      54             :     using ::com::sun::star::sdbc::XStatement;
      55             :     using ::com::sun::star::lang::DisposedException;
      56             :     using ::com::sun::star::sdbc::XRow;
      57             : 
      58             : 
      59             :     //= HView
      60             : 
      61             : 
      62           0 :     HView::HView( const Reference< XConnection >& _rxConnection, sal_Bool _bCaseSensitive,
      63             :         const OUString& _rSchemaName, const OUString& _rName )
      64           0 :         :HView_Base( _bCaseSensitive, _rName, _rxConnection->getMetaData(), 0, OUString(), _rSchemaName, OUString() )
      65           0 :         ,m_xConnection( _rxConnection )
      66             :     {
      67           0 :     }
      68             : 
      69             : 
      70           0 :     HView::~HView()
      71             :     {
      72           0 :     }
      73             : 
      74             : 
      75           0 :     IMPLEMENT_FORWARD_XINTERFACE2( HView, HView_Base, HView_IBASE )
      76           0 :     IMPLEMENT_FORWARD_XTYPEPROVIDER2( HView, HView_Base, HView_IBASE )
      77             : 
      78             : 
      79           0 :     void SAL_CALL HView::alterCommand( const OUString& _rNewCommand ) throw (SQLException, RuntimeException, std::exception)
      80             :     {
      81             :         // not really atomic ... as long as we do not have something like
      82             :         //   ALTER VIEW <name> TO <command>
      83             :         // in HSQL, we need to do it this way ...
      84             :         //
      85             :         // I can imagine scenarios where this fails, e.g. when dropping the view
      86             :         // succeedes, re-creating it fails, some other thread alters a table which
      87             :         // the view was based on, and then we try to restore the view with the
      88             :         // original command, which then fails, too.
      89             :         //
      90             :         // However, there's not much chance to prevent this kind of errors without
      91             :         // backend support.
      92             : 
      93             :         OUString sQualifiedName( ::dbtools::composeTableName(
      94           0 :             m_xMetaData, m_CatalogName, m_SchemaName, m_Name, true, ::dbtools::eInDataManipulation ) );
      95             : 
      96           0 :         ::utl::SharedUNOComponent< XStatement > xStatement; xStatement.set( m_xConnection->createStatement(), UNO_QUERY_THROW );
      97             : 
      98             :         // create a statement which can be used to re-create the original view, in case
      99             :         // dropping it succeeds, but creating it with a new statement fails
     100           0 :         OUStringBuffer aRestoreCommand;
     101           0 :         aRestoreCommand.appendAscii( "CREATE VIEW " );
     102           0 :         aRestoreCommand.append     ( sQualifiedName );
     103           0 :         aRestoreCommand.appendAscii( " AS " );
     104           0 :         aRestoreCommand.append     ( impl_getCommand_throw() );
     105           0 :         OUString sRestoreCommand( aRestoreCommand.makeStringAndClear() );
     106             : 
     107           0 :         bool bDropSucceeded( false );
     108             :         try
     109             :         {
     110             :             // drop the existing view
     111           0 :             OUStringBuffer aCommand;
     112           0 :             aCommand.appendAscii( "DROP VIEW " );
     113           0 :             aCommand.append     ( sQualifiedName );
     114           0 :             xStatement->execute( aCommand.makeStringAndClear() );
     115           0 :             bDropSucceeded = true;
     116             : 
     117             :             // create a new one with the same name
     118           0 :             aCommand.appendAscii( "CREATE VIEW " );
     119           0 :             aCommand.append     ( sQualifiedName );
     120           0 :             aCommand.appendAscii( " AS " );
     121           0 :             aCommand.append     ( _rNewCommand );
     122           0 :             xStatement->execute( aCommand.makeStringAndClear() );
     123             :         }
     124           0 :         catch( const SQLException& )
     125             :         {
     126           0 :             if ( bDropSucceeded )
     127             :                 // drop succeeded, but creation failed -> re-create the view with the original
     128             :                 // statemnet
     129           0 :                 xStatement->execute( sRestoreCommand );
     130           0 :             throw;
     131             :         }
     132           0 :         catch( const RuntimeException& )
     133             :         {
     134           0 :             if ( bDropSucceeded )
     135           0 :                 xStatement->execute( sRestoreCommand );
     136           0 :             throw;
     137             :         }
     138           0 :         catch( const Exception& )
     139             :         {
     140           0 :             if ( bDropSucceeded )
     141           0 :                 xStatement->execute( sRestoreCommand );
     142             :             DBG_UNHANDLED_EXCEPTION();
     143           0 :         }
     144           0 :     }
     145             : 
     146             : 
     147           0 :     void SAL_CALL HView::getFastPropertyValue( Any& _rValue, sal_Int32 _nHandle ) const
     148             :     {
     149           0 :         if ( _nHandle == PROPERTY_ID_COMMAND )
     150             :         {
     151             :             // retrieve the very current command, don't rely on the base classes cached value
     152             :             // (which we initialized empty, anyway)
     153             :             try
     154             :             {
     155           0 :                 _rValue <<= impl_getCommand_throw();
     156             :             }
     157           0 :             catch (const SQLException& e)
     158             :             {
     159             :                 throw WrappedTargetException(e.Message,
     160             :                     static_cast< XAlterView* >( const_cast< HView* >( this ) ),
     161           0 :                         ::cppu::getCaughtException() );
     162             :             }
     163             :         }
     164             : 
     165           0 :         HView_Base::getFastPropertyValue( _rValue, _nHandle );
     166           0 :     }
     167             : 
     168             : 
     169           0 :     OUString HView::impl_getCommand_throw() const
     170             :     {
     171           0 :         OUString sCommand;
     172             : 
     173             :         try
     174             :         {
     175           0 :             OUStringBuffer aCommand;
     176           0 :             aCommand.appendAscii( "SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.SYSTEM_VIEWS " );
     177           0 :             HTools::appendTableFilterCrit( aCommand, m_CatalogName, m_SchemaName, m_Name, false );
     178           0 :             ::utl::SharedUNOComponent< XStatement > xStatement; xStatement.set( m_xConnection->createStatement(), UNO_QUERY_THROW );
     179           0 :             Reference< XResultSet > xResult( xStatement->executeQuery( aCommand.makeStringAndClear() ), UNO_QUERY_THROW );
     180           0 :             if ( !xResult->next() )
     181             :             {
     182             :                 // hmm. There is no view view the name as we know it. Can only mean some other instance
     183             :                 // dropped this view meanwhile ...
     184           0 :                 throw DisposedException();
     185             :             }
     186             : 
     187           0 :             Reference< XRow > xRow( xResult, UNO_QUERY_THROW );
     188           0 :             sCommand = xRow->getString( 1 );
     189             :         }
     190           0 :         catch( const RuntimeException& ) { throw; }
     191           0 :         catch( const SQLException& ) { throw; }
     192           0 :         catch( const Exception& )
     193             :         {
     194             :             DBG_UNHANDLED_EXCEPTION();
     195             :         }
     196             : 
     197           0 :         return sCommand;
     198             :     }
     199             : 
     200             : 
     201             : } } // namespace connectivity::hsqldb
     202             : 
     203             : 
     204             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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