2 // Copyright (C) 2004 Ricardo Cruz <rick2@aeiou.pt>
3 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
5 // This program is free software: you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation, either version 3 of the License, or
8 // (at your option) any later version.
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program. If not, see <http://www.gnu.org/licenses/>.
18 #ifndef HEADER_SUPERTUX_SUPERTUX_OBJECT_FACTORY_HPP
19 #define HEADER_SUPERTUX_SUPERTUX_OBJECT_FACTORY_HPP
23 #include "supertux/direction.hpp"
24 #include "util/reader_fwd.hpp"
35 /** Creates a new gameobject from a lisp node.
36 * Remember to delete the objects later
38 virtual GameObject* create_object(const Reader& reader) = 0;
40 typedef std::map<std::string, Factory*> Factories;
41 static Factories &get_factories()
43 static Factories object_factories;
44 return object_factories;
48 GameObject* create_object(const std::string& name, const Reader& reader);
49 GameObject* create_object(const std::string& name, const Vector& pos, const Direction dir = AUTO);
51 /** comment from Matze:
52 * Yes I know macros are evil, but in this specific case they save
53 * A LOT of typing and evil code duplication.
54 * I'll happily accept alternatives if someone can present me one that does
55 * not involve typing 4 or more lines for each object class
57 #define IMPLEMENT_FACTORY(CLASS, NAME) \
58 class INTERN_##CLASS##Factory : public Factory \
61 INTERN_##CLASS##Factory() \
63 get_factories()[NAME] = this; \
66 ~INTERN_##CLASS##Factory() \
68 get_factories().erase(NAME); \
71 virtual GameObject* create_object(const Reader& reader) \
73 return new CLASS(reader); \
76 static INTERN_##CLASS##Factory factory_##CLASS