Claw 1.7.3
factory.hpp
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1/*
2 CLAW - a C++ Library Absolutely Wonderful
3
4 CLAW is a free library without any particular aim but being useful to
5 anyone.
6
7 Copyright (C) 2005-2011 Julien Jorge
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 This library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22
23 contact: julien.jorge@gamned.org
24*/
30#ifndef __CLAW_FACTORY_HPP__
31#define __CLAW_FACTORY_HPP__
32
33#ifdef CLAW_FACTORY_IS_SINGLETON
35#endif
36
37#include <claw/exception.hpp>
38#include <map>
39
40namespace claw
41{
42 namespace pattern
43 {
49 public exception
50 {
51 public:
56 : exception("No type has this identifier.")
57 { }
58 }; // class bad_type_identifier
59
72 template<typename BaseClass, typename IdentifierType>
73#ifdef CLAW_FACTORY_IS_SINGLETON
74 class factory:
75 public basic_singleton< factory<BaseClass, IdentifierType> >
76#else
77 class factory
78#endif
79 {
80 private:
85 class class_creator_base
86 {
87 public:
88 virtual ~class_creator_base();
89 virtual BaseClass* create() const = 0;
90
91 }; // class class_creator_base
92
102 template<typename Derived>
103 class class_creator:
104 public class_creator_base
105 {
106 public:
107 virtual Derived* create() const;
108
109 }; // class class_creator
110
112 typedef IdentifierType identifier_type;
113
115 typedef BaseClass base_class;
116
118 typedef std::map<identifier_type, class_creator_base*> class_map;
119
120 public:
121 ~factory();
122
123 template<typename T>
124 bool register_type( const identifier_type& id );
125
126 base_class* create( const identifier_type& id ) const;
127
128 bool is_known_type( const identifier_type& id ) const;
129
130 private:
132 class_map m_classes;
133
134 }; // class factory
135
136 } // namespace pattern
137} // namespace claw
138
139#include <claw/impl/factory.tpp>
140
141#endif // __CLAW_FACTORY_HPP__
A (really) basic implementation of the singleton design pattern.
A simple class to use as exception with string message.
Definition exception.hpp:44
Exception thrown when an incorrect identifier is given to a type.
Definition factory.hpp:50
The design pattern of the factory allow to dynamically instanciate classes of various types given an ...
Definition factory.hpp:79
A simple class to use as exception with string message.
This is the main namespace.
Definition algorithm.hpp:34