You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
162 lines
4.7 KiB
162 lines
4.7 KiB
/****************************************************************************
|
|
**
|
|
** Implementation of TQSqlDriverPlugin class
|
|
**
|
|
** Created : 2001-09-20
|
|
**
|
|
** Copyright (C) 2001-2008 Trolltech ASA. All rights reserved.
|
|
**
|
|
** This file is part of the sql module of the TQt GUI Toolkit.
|
|
**
|
|
** This file may be used under the terms of the GNU General
|
|
** Public License versions 2.0 or 3.0 as published by the Free
|
|
** Software Foundation and appearing in the files LICENSE.GPL2
|
|
** and LICENSE.GPL3 included in the packaging of this file.
|
|
** Alternatively you may (at your option) use any later version
|
|
** of the GNU General Public License if such license has been
|
|
** publicly approved by Trolltech ASA (or its successors, if any)
|
|
** and the KDE Free TQt Foundation.
|
|
**
|
|
** Please review the following information to ensure GNU General
|
|
** Public Licensing requirements will be met:
|
|
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
|
|
** If you are unsure which license is appropriate for your use, please
|
|
** review the following information:
|
|
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
|
|
** or contact the sales department at sales@trolltech.com.
|
|
**
|
|
** This file may be used under the terms of the Q Public License as
|
|
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
|
|
** included in the packaging of this file. Licensees holding valid TQt
|
|
** Commercial licenses may use this file in accordance with the TQt
|
|
** Commercial License Agreement provided with the Software.
|
|
**
|
|
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
|
|
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
|
|
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
|
|
** herein.
|
|
**
|
|
**********************************************************************/
|
|
|
|
#include "ntqsqldriverplugin.h"
|
|
|
|
#ifndef TQT_NO_SQL
|
|
#ifndef TQT_NO_COMPONENT
|
|
|
|
#include "qsqldriverinterface_p.h"
|
|
|
|
/*!
|
|
\class TQSqlDriverPlugin ntqsqldriverplugin.h
|
|
\brief The TQSqlDriverPlugin class provides an abstract base for custom TQSqlDriver plugins.
|
|
|
|
\ingroup plugins
|
|
\mainclass
|
|
|
|
The SQL driver plugin is a simple plugin interface that makes it
|
|
easy to create your own SQL driver plugins that can be loaded
|
|
dynamically by TQt.
|
|
|
|
Writing a SQL plugin is achieved by subclassing this base class,
|
|
reimplementing the pure virtual functions keys() and create(), and
|
|
exporting the class with the \c TQ_EXPORT_PLUGIN macro. See the SQL
|
|
plugins that come with TQt for example implementations (in the
|
|
\c{plugins/src/sqldrivers} subdirectory of the source
|
|
distribution). Read the \link plugins-howto.html plugins
|
|
documentation\endlink for more information on plugins.
|
|
*/
|
|
|
|
/*!
|
|
\fn TQStringList TQSqlDriverPlugin::keys() const
|
|
|
|
Returns the list of drivers (keys) this plugin supports.
|
|
|
|
These keys are usually the class names of the custom drivers that
|
|
are implemented in the plugin.
|
|
|
|
\sa create()
|
|
*/
|
|
|
|
/*!
|
|
\fn TQSqlDriver* TQSqlDriverPlugin::create( const TQString& key )
|
|
|
|
Creates and returns a TQSqlDriver object for the driver key \a key.
|
|
The driver key is usually the class name of the required driver.
|
|
|
|
\sa keys()
|
|
*/
|
|
|
|
class TQSqlDriverPluginPrivate : public TQSqlDriverFactoryInterface
|
|
{
|
|
public:
|
|
TQSqlDriverPluginPrivate( TQSqlDriverPlugin *p )
|
|
: plugin( p )
|
|
{
|
|
}
|
|
virtual ~TQSqlDriverPluginPrivate();
|
|
|
|
TQRESULT queryInterface( const TQUuid &iid, TQUnknownInterface **iface );
|
|
TQ_REFCOUNT;
|
|
|
|
TQStringList featureList() const;
|
|
TQSqlDriver *create( const TQString &key );
|
|
|
|
private:
|
|
TQSqlDriverPlugin *plugin;
|
|
};
|
|
|
|
TQSqlDriverPluginPrivate::~TQSqlDriverPluginPrivate()
|
|
{
|
|
delete plugin;
|
|
}
|
|
|
|
TQRESULT TQSqlDriverPluginPrivate::queryInterface( const TQUuid &iid, TQUnknownInterface **iface )
|
|
{
|
|
*iface = 0;
|
|
|
|
if ( iid == IID_QUnknown )
|
|
*iface = this;
|
|
else if ( iid == IID_QFeatureList )
|
|
*iface = this;
|
|
else if ( iid == IID_QSqlDriverFactory )
|
|
*iface = this;
|
|
else
|
|
return TQE_NOINTERFACE;
|
|
|
|
(*iface)->addRef();
|
|
return TQS_OK;
|
|
}
|
|
|
|
TQStringList TQSqlDriverPluginPrivate::featureList() const
|
|
{
|
|
return plugin->keys();
|
|
}
|
|
|
|
TQSqlDriver *TQSqlDriverPluginPrivate::create( const TQString &key )
|
|
{
|
|
return plugin->create( key );
|
|
}
|
|
|
|
/*!
|
|
Constructs a SQL driver plugin. This is invoked automatically by
|
|
the \c TQ_EXPORT_PLUGIN macro.
|
|
*/
|
|
|
|
TQSqlDriverPlugin::TQSqlDriverPlugin()
|
|
: TQGPlugin( d = new TQSqlDriverPluginPrivate( this ) )
|
|
{
|
|
}
|
|
|
|
/*!
|
|
Destroys the SQL driver plugin.
|
|
|
|
You never have to call this explicitly. TQt destroys a plugin
|
|
automatically when it is no longer used.
|
|
*/
|
|
TQSqlDriverPlugin::~TQSqlDriverPlugin()
|
|
{
|
|
// don't delete d, as this is deleted by d
|
|
}
|
|
|
|
#endif // TQT_NO_COMPONENT
|
|
#endif // TQT_NO_SQL
|