firebird: release driver on dispose rather than destroy.

Change-Id: I5ffeaf818c1eb4985bdd150830f089f03fe42ceb

connectivity/source/drivers/firebird/Connection.cxx

@@ -77,7 +77,7 @@ const OUString Connection::our_sDBLocation( "firebird.fdb" );
 Connection::Connection(FirebirdDriver*    _pDriver)
     : Connection_BASE(m_aMutex)
     , OSubComponent<Connection, Connection_BASE>((::cppu::OWeakObject*)_pDriver, this)
-    , m_pDriver(_pDriver)
+    , m_xDriver(_pDriver)
     , m_sConnectionURL()
     , m_sFirebirdURL()
     , m_bIsEmbedded(false)
@@ -93,16 +93,12 @@ Connection::Connection(FirebirdDriver*    _pDriver)
     , m_xMetaData(0)
     , m_aStatements()
 {
-    m_pDriver->acquire();
 }
 
 Connection::~Connection()
 {
     if(!isClosed())
         close();
-
-    m_pDriver->release();
-    m_pDriver = 0;
 }
 
 void SAL_CALL Connection::release() throw()
@@ -348,7 +344,7 @@ OUString Connection::transformPreparedStatement(const OUString& _sSQL)
     OUString sSqlStatement (_sSQL);
     try
     {
-        OSQLParser aParser( m_pDriver->getContext() );
+        OSQLParser aParser( m_xDriver->getContext() );
         OUString sErrorMessage;
         OUString sNewSql;
         OSQLParseNode* pNode = aParser.parseTree(sErrorMessage,_sSQL);
@@ -758,6 +754,7 @@ void Connection::disposing()
 
     dispose_ChildImpl();
     cppu::WeakComponentImplHelperBase::disposing();
+    m_xDriver.clear();
 }
 
 void Connection::disposeStatements()

connectivity/source/drivers/firebird/Connection.hxx

@@ -83,7 +83,7 @@ namespace connectivity
                                                                     //  for each row returned by
                                                                     //  DatabaseMetaData.getTypeInfo.
             /** The parent driver that created this connection. */
-            FirebirdDriver*     m_pDriver;
+            ::rtl::Reference<FirebirdDriver>     m_xDriver;
 
             /** The URL passed to us when opening, i.e. of the form sdbc:* */
             ::rtl::OUString     m_sConnectionURL;
@@ -179,8 +179,6 @@ namespace connectivity
             throw(::com::sun::star::sdbc::SQLException,
                   ::com::sun::star::uno::RuntimeException);
 
-            FirebirdDriver* getDriver()         const {return m_pDriver;}
-
             ::rtl::OUString getConnectionURL()  const   {return m_sConnectionURL;}
             bool        isEmbedded()        const   {return m_bIsEmbedded;}
             ::rtl::OUString getUserName()       const   {return m_sUser;}