1 /***********************************************************************
2 * Software License Agreement (BSD License)
4 * Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
5 * Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *************************************************************************/
31 #ifndef OBJECT_FACTORY_H_
32 #define OBJECT_FACTORY_H_
39 template<typename BaseClass, typename DerivedClass>
40 BaseClass* createObject()
42 return new DerivedClass();
45 template<typename BaseClass, typename UniqueIdType>
48 typedef BaseClass* (*CreateObjectFunc)();
49 std::map<UniqueIdType, CreateObjectFunc> object_registry;
51 // singleton class, private constructor
55 typedef typename std::map<UniqueIdType, CreateObjectFunc>::iterator Iterator;
58 template<typename DerivedClass>
59 bool register_(UniqueIdType id)
61 if (object_registry.find(id) != object_registry.end())
64 object_registry[id] = &createObject<BaseClass, DerivedClass>;
68 bool unregister(UniqueIdType id)
70 return (object_registry.erase(id) == 1);
73 BaseClass* create(UniqueIdType id)
75 Iterator iter = object_registry.find(id);
77 if (iter == object_registry.end())
80 return ((*iter).second)();
83 static ObjectFactory<BaseClass,UniqueIdType>& instance()
85 static ObjectFactory<BaseClass,UniqueIdType> the_factory;
93 #endif /* OBJECT_FACTORY_H_ */