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