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Open Source Computer Vision Library
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93 lines
2.8 KiB
93 lines
2.8 KiB
/*********************************************************************** |
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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 OBJECT_FACTORY_H_ |
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#define OBJECT_FACTORY_H_ |
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#include <map> |
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namespace cvflann |
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{ |
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template<typename BaseClass, typename DerivedClass> |
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BaseClass* createObject() |
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{ |
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return new DerivedClass(); |
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} |
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template<typename BaseClass, typename UniqueIdType> |
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class ObjectFactory |
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{ |
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typedef BaseClass* (*CreateObjectFunc)(); |
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std::map<UniqueIdType, CreateObjectFunc> object_registry; |
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// singleton class, private constructor |
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ObjectFactory() {}; |
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public: |
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typedef typename std::map<UniqueIdType, CreateObjectFunc>::iterator Iterator; |
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template<typename DerivedClass> |
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bool register_(UniqueIdType id) |
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{ |
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if (object_registry.find(id) != object_registry.end()) |
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return false; |
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object_registry[id] = &createObject<BaseClass, DerivedClass>; |
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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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BaseClass* create(UniqueIdType id) |
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{ |
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Iterator iter = object_registry.find(id); |
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if (iter == object_registry.end()) |
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return NULL; |
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return ((*iter).second)(); |
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} |
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static ObjectFactory<BaseClass,UniqueIdType>& instance() |
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{ |
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static ObjectFactory<BaseClass,UniqueIdType> the_factory; |
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return the_factory; |
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} |
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}; |
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} |
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#endif /* OBJECT_FACTORY_H_ */
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