1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/***********************************************************************
* 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.
*************************************************************************/
#ifndef FLANN_OBJECT_FACTORY_H_
#define FLANN_OBJECT_FACTORY_H_
#include <map>
namespace flann
{
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;
};
}
#endif /* FLANN_OBJECT_FACTORY_H_ */
|
