| /*********************************************************************** | |
| * 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 | |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| *************************************************************************/ | |
| //! @cond IGNORED | |
| 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 | |