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|
/* -*- 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 <stdio.h>
#include "mdrivermanager.hxx"
#include <com/sun/star/configuration/theDefaultProvider.hpp>
#include <com/sun/star/sdbc/XDriver.hpp>
#include <com/sun/star/container/XContentEnumerationAccess.hpp>
#include <com/sun/star/container/ElementExistException.hpp>
#include <com/sun/star/beans/NamedValue.hpp>
#include <tools/diagnose_ex.h>
#include <comphelper/processfactory.hxx>
#include <cppuhelper/implbase1.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <cppuhelper/weakref.hxx>
#include <osl/diagnose.h>
#include <algorithm>
#include <iterator>
#include <vector>
#include <o3tl/compat_functional.hxx>
namespace drivermanager
{
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::container;
using namespace ::com::sun::star::logging;
using namespace ::osl;
#define SERVICE_SDBC_DRIVER OUString("com.sun.star.sdbc.Driver")
void throwNoSuchElementException() throw(NoSuchElementException)
{
throw NoSuchElementException();
}
//= ODriverEnumeration
class ODriverEnumeration : public ::cppu::WeakImplHelper1< XEnumeration >
{
friend class OSDBCDriverManager;
typedef std::vector< Reference< XDriver > > DriverArray;
DriverArray m_aDrivers;
DriverArray::const_iterator m_aPos;
// order matters!
protected:
virtual ~ODriverEnumeration();
public:
ODriverEnumeration(const DriverArray& _rDriverSequence);
// XEnumeration
virtual sal_Bool SAL_CALL hasMoreElements( ) throw(RuntimeException, std::exception) SAL_OVERRIDE;
virtual Any SAL_CALL nextElement( ) throw(NoSuchElementException, WrappedTargetException, RuntimeException, std::exception) SAL_OVERRIDE;
};
ODriverEnumeration::ODriverEnumeration(const DriverArray& _rDriverSequence)
:m_aDrivers( _rDriverSequence )
,m_aPos( m_aDrivers.begin() )
{
}
ODriverEnumeration::~ODriverEnumeration()
{
}
sal_Bool SAL_CALL ODriverEnumeration::hasMoreElements( ) throw(RuntimeException, std::exception)
{
return m_aPos != m_aDrivers.end();
}
Any SAL_CALL ODriverEnumeration::nextElement( ) throw(NoSuchElementException, WrappedTargetException, RuntimeException, std::exception)
{
if ( !hasMoreElements() )
throwNoSuchElementException();
return makeAny( *m_aPos++ );
}
//= helper
/// an STL functor which ensures that a SdbcDriver described by a DriverAccess is loaded
struct EnsureDriver : public ::std::unary_function< DriverAccess, DriverAccess >
{
EnsureDriver( const Reference< XComponentContext > &rxContext )
: mxContext( rxContext ) {}
const DriverAccess& operator()( const DriverAccess& _rDescriptor ) const
{
if ( !_rDescriptor.xDriver.is() )
// we did not load this driver, yet
if ( _rDescriptor.xComponentFactory.is() )
// we have a factory for it
const_cast< DriverAccess& >( _rDescriptor ).xDriver = _rDescriptor.xDriver.query(
_rDescriptor.xComponentFactory->createInstanceWithContext( mxContext ) );
return _rDescriptor;
}
private:
Reference< XComponentContext > mxContext;
};
/// an STL functor which extracts a SdbcDriver from a DriverAccess
struct ExtractDriverFromAccess : public ::std::unary_function< DriverAccess, Reference<XDriver> >
{
Reference<XDriver> operator()( const DriverAccess& _rAccess ) const
{
return _rAccess.xDriver;
}
};
typedef ::o3tl::unary_compose< ExtractDriverFromAccess, EnsureDriver > ExtractAfterLoad_BASE;
/// an STL functor which loads a driver described by a DriverAccess, and extracts the SdbcDriver
struct ExtractAfterLoad : public ExtractAfterLoad_BASE
{
ExtractAfterLoad( const Reference< XComponentContext > &rxContext )
: ExtractAfterLoad_BASE( ExtractDriverFromAccess(), EnsureDriver( rxContext ) ) {}
};
struct ExtractDriverFromCollectionElement : public ::std::unary_function< DriverCollection::value_type, Reference<XDriver> >
{
Reference<XDriver> operator()( const DriverCollection::value_type& _rElement ) const
{
return _rElement.second;
}
};
// predicate for checking whether or not a driver accepts a given URL
class AcceptsURL : public ::std::unary_function< Reference<XDriver>, bool >
{
protected:
const OUString& m_rURL;
public:
// ctor
AcceptsURL( const OUString& _rURL ) : m_rURL( _rURL ) { }
bool operator()( const Reference<XDriver>& _rDriver ) const
{
// ask the driver
if ( _rDriver.is() && _rDriver->acceptsURL( m_rURL ) )
return true;
// does not accept ...
return false;
}
};
static sal_Int32 lcl_getDriverPrecedence( const Reference<XComponentContext>& _rContext, Sequence< OUString >& _rPrecedence )
{
_rPrecedence.realloc( 0 );
try
{
// some strings we need
const OUString sDriverManagerConfigLocation( "org.openoffice.Office.DataAccess/DriverManager" );
const OUString sDriverPreferenceLocation( "DriverPrecedence" );
const OUString sNodePathArgumentName( "nodepath" );
const OUString sNodeAccessServiceName( "com.sun.star.configuration.ConfigurationAccess" );
// create a configuration provider
Reference< XMultiServiceFactory > xConfigurationProvider(
com::sun::star::configuration::theDefaultProvider::get( _rContext ) );
// one argument for creating the node access: the path to the configuration node
Sequence< Any > aCreationArgs(1);
aCreationArgs[0] <<= NamedValue( sNodePathArgumentName, makeAny( sDriverManagerConfigLocation ) );
// create the node access
Reference< XNameAccess > xDriverManagerNode(xConfigurationProvider->createInstanceWithArguments(sNodeAccessServiceName, aCreationArgs), UNO_QUERY);
OSL_ENSURE(xDriverManagerNode.is(), "lcl_getDriverPrecedence: could not open my configuration node!");
if (xDriverManagerNode.is())
{
// obtain the preference list
Any aPreferences = xDriverManagerNode->getByName(sDriverPreferenceLocation);
#if OSL_DEBUG_LEVEL > 0
bool bSuccess =
#endif
aPreferences >>= _rPrecedence;
OSL_ENSURE(bSuccess || !aPreferences.hasValue(), "lcl_getDriverPrecedence: invalid value for the preferences node (no string sequence but not NULL)!");
}
}
catch( const Exception& )
{
DBG_UNHANDLED_EXCEPTION();
}
return _rPrecedence.getLength();
}
/// an STL argorithm compatible predicate comparing two DriverAccess instances by their implementation names
struct CompareDriverAccessByName : public ::std::binary_function< DriverAccess, DriverAccess, bool >
{
bool operator()( const DriverAccess& lhs, const DriverAccess& rhs )
{
return lhs.sImplementationName < rhs.sImplementationName;
}
};
/// and STL argorithm compatible predicate comparing a DriverAccess' impl name to a string
struct EqualDriverAccessToName : public ::std::binary_function< DriverAccess, OUString, bool >
{
OUString m_sImplName;
EqualDriverAccessToName(const OUString& _sImplName) : m_sImplName(_sImplName){}
bool operator()( const DriverAccess& lhs)
{
return lhs.sImplementationName.equals(m_sImplName);
}
};
//= OSDBCDriverManager
OSDBCDriverManager::OSDBCDriverManager( const Reference< XComponentContext >& _rxContext )
:m_xContext( _rxContext )
,m_aEventLogger( _rxContext, "org.openoffice.logging.sdbc.DriverManager" )
,m_aDriverConfig(m_xContext)
,m_nLoginTimeout(0)
{
// bootstrap all objects supporting the .sdb.Driver service
bootstrapDrivers();
// initialize the drivers order
initializeDriverPrecedence();
}
OSDBCDriverManager::~OSDBCDriverManager()
{
}
void OSDBCDriverManager::bootstrapDrivers()
{
Reference< XContentEnumerationAccess > xEnumAccess( m_xContext->getServiceManager(), UNO_QUERY );
Reference< XEnumeration > xEnumDrivers;
if (xEnumAccess.is())
xEnumDrivers = xEnumAccess->createContentEnumeration(SERVICE_SDBC_DRIVER);
OSL_ENSURE( xEnumDrivers.is(), "OSDBCDriverManager::bootstrapDrivers: no enumeration for the drivers available!" );
if (xEnumDrivers.is())
{
Reference< XSingleComponentFactory > xFactory;
Reference< XServiceInfo > xSI;
while (xEnumDrivers->hasMoreElements())
{
xFactory.set(xEnumDrivers->nextElement(), css::uno::UNO_QUERY);
OSL_ENSURE( xFactory.is(), "OSDBCDriverManager::bootstrapDrivers: no factory extracted" );
if ( xFactory.is() )
{
// we got a factory for the driver
DriverAccess aDriverDescriptor;
bool bValidDescriptor = false;
// can it tell us something about the implementation name?
xSI = xSI.query( xFactory );
if ( xSI.is() )
{ // yes -> no need to load the driver immediately (load it later when needed)
aDriverDescriptor.sImplementationName = xSI->getImplementationName();
aDriverDescriptor.xComponentFactory = xFactory;
bValidDescriptor = true;
m_aEventLogger.log( LogLevel::CONFIG,
"found SDBC driver $1$, no need to load it",
aDriverDescriptor.sImplementationName
);
}
else
{
// no -> create the driver
Reference< XDriver > xDriver( xFactory->createInstanceWithContext( m_xContext ), UNO_QUERY );
OSL_ENSURE( xDriver.is(), "OSDBCDriverManager::bootstrapDrivers: a driver which is no driver?!" );
if ( xDriver.is() )
{
aDriverDescriptor.xDriver = xDriver;
// and obtain it's implementation name
xSI = xSI.query( xDriver );
OSL_ENSURE( xSI.is(), "OSDBCDriverManager::bootstrapDrivers: a driver without service info?" );
if ( xSI.is() )
{
aDriverDescriptor.sImplementationName = xSI->getImplementationName();
bValidDescriptor = true;
m_aEventLogger.log( LogLevel::CONFIG,
"found SDBC driver $1$, needed to load it",
aDriverDescriptor.sImplementationName
);
}
}
}
if ( bValidDescriptor )
{
m_aDriversBS.push_back( aDriverDescriptor );
}
}
}
}
}
void OSDBCDriverManager::initializeDriverPrecedence()
{
if ( m_aDriversBS.empty() )
// nothing to do
return;
try
{
// get the precedence of the drivers from the configuration
Sequence< OUString > aDriverOrder;
if ( 0 == lcl_getDriverPrecedence( m_xContext, aDriverOrder ) )
// nothing to do
return;
// aDriverOrder now is the list of driver implementation names in the order they should be used
if ( m_aEventLogger.isLoggable( LogLevel::CONFIG ) )
{
sal_Int32 nOrderedCount = aDriverOrder.getLength();
for ( sal_Int32 i=0; i<nOrderedCount; ++i )
m_aEventLogger.log( LogLevel::CONFIG,
"configuration's driver order: driver $1$ of $2$: $3$",
(sal_Int32)(i + 1), nOrderedCount, aDriverOrder[i]
);
}
// sort our bootstrapped drivers
::std::sort( m_aDriversBS.begin(), m_aDriversBS.end(), CompareDriverAccessByName() );
// loop through the names in the precedence order
const OUString* pDriverOrder = aDriverOrder.getConstArray();
const OUString* pDriverOrderEnd = pDriverOrder + aDriverOrder.getLength();
// the first driver for which there is no preference
DriverAccessArray::iterator aNoPrefDriversStart = m_aDriversBS.begin();
// at the moment this is the first of all drivers we know
for ( ; ( pDriverOrder < pDriverOrderEnd ) && ( aNoPrefDriversStart != m_aDriversBS.end() ); ++pDriverOrder )
{
DriverAccess driver_order;
driver_order.sImplementationName = *pDriverOrder;
// look for the impl name in the DriverAccess array
::std::pair< DriverAccessArray::iterator, DriverAccessArray::iterator > aPos =
::std::equal_range( aNoPrefDriversStart, m_aDriversBS.end(), driver_order, CompareDriverAccessByName() );
if ( aPos.first != aPos.second )
{ // we have a DriverAccess with this impl name
OSL_ENSURE( ::std::distance( aPos.first, aPos.second ) == 1,
"OSDBCDriverManager::initializeDriverPrecedence: more than one driver with this impl name? How this?" );
// move the DriverAccess pointed to by aPos.first to the position pointed to by aNoPrefDriversStart
if ( aPos.first != aNoPrefDriversStart )
{ // if this does not hold, the DriverAccess alread has the correct position
// rotate the range [aNoPrefDriversStart, aPos.second) right 1 element
::std::rotate( aNoPrefDriversStart, aPos.second - 1, aPos.second );
}
// next round we start searching and pos right
++aNoPrefDriversStart;
}
}
}
catch (Exception&)
{
OSL_FAIL("OSDBCDriverManager::initializeDriverPrecedence: caught an exception while sorting the drivers!");
}
}
Reference< XConnection > SAL_CALL OSDBCDriverManager::getConnection( const OUString& _rURL ) throw(SQLException, RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
m_aEventLogger.log( LogLevel::INFO,
"connection requested for URL $1$",
_rURL
);
Reference< XConnection > xConnection;
Reference< XDriver > xDriver = implGetDriverForURL(_rURL);
if (xDriver.is())
{
// TODO : handle the login timeout
xConnection = xDriver->connect(_rURL, Sequence< PropertyValue >());
// may throw an exception
m_aEventLogger.log( LogLevel::INFO,
"connection retrieved for URL $1$",
_rURL
);
}
return xConnection;
}
Reference< XConnection > SAL_CALL OSDBCDriverManager::getConnectionWithInfo( const OUString& _rURL, const Sequence< PropertyValue >& _rInfo ) throw(SQLException, RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
m_aEventLogger.log( LogLevel::INFO,
"connection with info requested for URL $1$",
_rURL
);
Reference< XConnection > xConnection;
Reference< XDriver > xDriver = implGetDriverForURL(_rURL);
if (xDriver.is())
{
// TODO : handle the login timeout
xConnection = xDriver->connect(_rURL, _rInfo);
// may throw an exception
m_aEventLogger.log( LogLevel::INFO,
"connection with info retrieved for URL $1$",
_rURL
);
}
return xConnection;
}
void SAL_CALL OSDBCDriverManager::setLoginTimeout( sal_Int32 seconds ) throw(RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
m_nLoginTimeout = seconds;
}
sal_Int32 SAL_CALL OSDBCDriverManager::getLoginTimeout( ) throw(RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
return m_nLoginTimeout;
}
Reference< XEnumeration > SAL_CALL OSDBCDriverManager::createEnumeration( ) throw(RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
ODriverEnumeration::DriverArray aDrivers;
// ensure that all our bootstrapped drivers are instantiated
::std::for_each( m_aDriversBS.begin(), m_aDriversBS.end(), EnsureDriver( m_xContext ) );
// copy the bootstrapped drivers
::std::transform(
m_aDriversBS.begin(), // "copy from" start
m_aDriversBS.end(), // "copy from" end
::std::back_inserter( aDrivers ), // insert into
ExtractDriverFromAccess() // transformation to apply (extract a driver from a driver access)
);
// append the runtime drivers
::std::transform(
m_aDriversRT.begin(), // "copy from" start
m_aDriversRT.end(), // "copy from" end
::std::back_inserter( aDrivers ), // insert into
ExtractDriverFromCollectionElement() // transformation to apply (extract a driver from a driver access)
);
return new ODriverEnumeration( aDrivers );
}
::com::sun::star::uno::Type SAL_CALL OSDBCDriverManager::getElementType( ) throw(::com::sun::star::uno::RuntimeException, std::exception)
{
return ::getCppuType(static_cast< Reference< XDriver >* >(NULL));
}
sal_Bool SAL_CALL OSDBCDriverManager::hasElements( ) throw(::com::sun::star::uno::RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
return !(m_aDriversBS.empty() && m_aDriversRT.empty());
}
OUString SAL_CALL OSDBCDriverManager::getImplementationName( ) throw(RuntimeException, std::exception)
{
return getImplementationName_static();
}
sal_Bool SAL_CALL OSDBCDriverManager::supportsService( const OUString& _rServiceName ) throw(RuntimeException, std::exception)
{
return cppu::supportsService(this, _rServiceName);
}
Sequence< OUString > SAL_CALL OSDBCDriverManager::getSupportedServiceNames( ) throw(RuntimeException, std::exception)
{
return getSupportedServiceNames_static();
}
Reference< XInterface > SAL_CALL OSDBCDriverManager::Create( const Reference< XMultiServiceFactory >& _rxFactory )
{
return *( new OSDBCDriverManager( comphelper::getComponentContext(_rxFactory) ) );
}
OUString SAL_CALL OSDBCDriverManager::getImplementationName_static( ) throw(RuntimeException)
{
return OUString("com.sun.star.comp.sdbc.OSDBCDriverManager");
}
Sequence< OUString > SAL_CALL OSDBCDriverManager::getSupportedServiceNames_static( ) throw(RuntimeException)
{
Sequence< OUString > aSupported(1);
aSupported[0] = getSingletonName_static();
return aSupported;
}
OUString SAL_CALL OSDBCDriverManager::getSingletonName_static( ) throw(RuntimeException)
{
return OUString( "com.sun.star.sdbc.DriverManager" );
}
Reference< XInterface > SAL_CALL OSDBCDriverManager::getRegisteredObject( const OUString& _rName ) throw(Exception, RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
DriverCollection::const_iterator aSearch = m_aDriversRT.find(_rName);
if (aSearch == m_aDriversRT.end())
throwNoSuchElementException();
return aSearch->second.get();
}
void SAL_CALL OSDBCDriverManager::registerObject( const OUString& _rName, const Reference< XInterface >& _rxObject ) throw(Exception, RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
m_aEventLogger.log( LogLevel::INFO,
"attempt to register new driver for name $1$",
_rName
);
DriverCollection::const_iterator aSearch = m_aDriversRT.find(_rName);
if (aSearch == m_aDriversRT.end())
{
Reference< XDriver > xNewDriver(_rxObject, UNO_QUERY);
if (xNewDriver.is())
m_aDriversRT.insert(DriverCollection::value_type(_rName, xNewDriver));
else
throw IllegalArgumentException();
}
else
throw ElementExistException();
m_aEventLogger.log( LogLevel::INFO,
"new driver registered for name $1$",
_rName
);
}
void SAL_CALL OSDBCDriverManager::revokeObject( const OUString& _rName ) throw(Exception, RuntimeException, std::exception)
{
MutexGuard aGuard(m_aMutex);
m_aEventLogger.log( LogLevel::INFO,
"attempt to revoke driver for name $1$",
_rName
);
DriverCollection::iterator aSearch = m_aDriversRT.find(_rName);
if (aSearch == m_aDriversRT.end())
throwNoSuchElementException();
m_aDriversRT.erase(aSearch); // we already have the iterator so we could use it
m_aEventLogger.log( LogLevel::INFO,
"driver revoked for name $1$",
_rName
);
}
Reference< XDriver > SAL_CALL OSDBCDriverManager::getDriverByURL( const OUString& _rURL ) throw(RuntimeException, std::exception)
{
m_aEventLogger.log( LogLevel::INFO,
"driver requested for URL $1$",
_rURL
);
Reference< XDriver > xDriver( implGetDriverForURL( _rURL ) );
if ( xDriver.is() )
m_aEventLogger.log( LogLevel::INFO,
"driver obtained for URL $1$",
_rURL
);
return xDriver;
}
Reference< XDriver > OSDBCDriverManager::implGetDriverForURL(const OUString& _rURL)
{
Reference< XDriver > xReturn;
{
const OUString sDriverFactoryName = m_aDriverConfig.getDriverFactoryName(_rURL);
EqualDriverAccessToName aEqual(sDriverFactoryName);
DriverAccessArray::iterator aFind = ::std::find_if(m_aDriversBS.begin(),m_aDriversBS.end(),aEqual);
if ( aFind == m_aDriversBS.end() )
{
// search all bootstrapped drivers
aFind = ::std::find_if(
m_aDriversBS.begin(), // begin of search range
m_aDriversBS.end(), // end of search range
o3tl::unary_compose< AcceptsURL, ExtractAfterLoad >( AcceptsURL( _rURL ), ExtractAfterLoad( m_xContext ) )
// compose two functors: extract the driver from the access, then ask the resulting driver for acceptance
);
} // if ( m_aDriversBS.find(sDriverFactoryName ) == m_aDriversBS.end() )
else
{
EnsureDriver aEnsure( m_xContext );
aEnsure(*aFind);
}
// found something?
if ( m_aDriversBS.end() != aFind && aFind->xDriver.is() && aFind->xDriver->acceptsURL(_rURL) )
xReturn = aFind->xDriver;
}
if ( !xReturn.is() )
{
// no -> search the runtime drivers
DriverCollection::iterator aPos = ::std::find_if(
m_aDriversRT.begin(), // begin of search range
m_aDriversRT.end(), // end of search range
o3tl::unary_compose< AcceptsURL, ExtractDriverFromCollectionElement >( AcceptsURL( _rURL ), ExtractDriverFromCollectionElement() )
// compose two functors: extract the driver from the access, then ask the resulting driver for acceptance
);
if ( m_aDriversRT.end() != aPos )
xReturn = aPos->second;
}
return xReturn;
}
} // namespace drivermanager
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