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/***********************************************************************
* Software License Agreement (BSD License)
*
* Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
* Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
*
* THE BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*************************************************************************/
#ifndef OPENCV_FLANN_OBJECT_FACTORY_H_
#define OPENCV_FLANN_OBJECT_FACTORY_H_
//! @cond IGNORED
#include <map>
namespace cvflann
{
class CreatorNotFound
{
};
template<typename BaseClass,
typename UniqueIdType,
typename ObjectCreator = BaseClass* (*)()>
class ObjectFactory
{
typedef ObjectFactory<BaseClass,UniqueIdType,ObjectCreator> ThisClass;
typedef std::map<UniqueIdType, ObjectCreator> ObjectRegistry;
// singleton class, private constructor
ObjectFactory() {}
public:
bool subscribe(UniqueIdType id, ObjectCreator creator)
{
if (object_registry.find(id) != object_registry.end()) return false;
object_registry[id] = creator;
return true;
}
bool unregister(UniqueIdType id)
{
return object_registry.erase(id) == 1;
}
ObjectCreator create(UniqueIdType id)
{
typename ObjectRegistry::const_iterator iter = object_registry.find(id);
if (iter == object_registry.end()) {
throw CreatorNotFound();
}
return iter->second;
}
static ThisClass& instance()
{
static ThisClass the_factory;
return the_factory;
}
private:
ObjectRegistry object_registry;
};
}
//! @endcond
#endif /* OPENCV_FLANN_OBJECT_FACTORY_H_ */
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