/*=========================================================================

  Library:   CTK
 
  Copyright (c) 2010  Kitware Inc.

  Licensed 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.commontk.org/LICENSE

  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.
 
=========================================================================*/

#ifndef __ctkAbstractPluginFactory_h
#define __ctkAbstractPluginFactory_h

// Qt includes
#include <QPluginLoader>
#include <QFileInfo>

// CTK includes
#include "ctkAbstractFactory.h"

//----------------------------------------------------------------------------
template<typename BaseClassType>
class ctkFactoryPluginItem : public ctkAbstractFactoryItem<BaseClassType>
{
public:
  explicit ctkFactoryPluginItem(const QString& key, const QString& path);
  virtual ~ctkFactoryPluginItem(){}
  virtual bool load();
  QString path()const;
  virtual QString loadErrorString()const;

protected:
  virtual BaseClassType* instanciator();

private:
  QPluginLoader    Loader;
  QString          Path;
};

//----------------------------------------------------------------------------
template<typename BaseClassType, typename FactoryItemType = ctkFactoryPluginItem<BaseClassType> >
class ctkAbstractPluginFactory : public ctkAbstractFactory<BaseClassType>
{
public:
  /// 
  /// Constructor
  explicit ctkAbstractPluginFactory();
  virtual ~ctkAbstractPluginFactory();

  ///
  /// Return a name allowing to uniquely identify the plugin
  /// By default, it return \a fileName 
  virtual QString fileNameToKey(const QString& fileName);

  ///
  /// Register a plugin in the factory
  /// The parameter \a key passed by reference will be updated with the
  /// associated object name obtained using ::fileNameToKey()
  virtual bool registerLibrary(const QFileInfo& file, QString& key);

private:
  ctkAbstractPluginFactory(const ctkAbstractPluginFactory &);  /// Not implemented
  void operator=(const ctkAbstractPluginFactory&); /// Not implemented
};

#include "ctkAbstractPluginFactory.tpp"

#endif