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source: code/branches/output/src/libraries/core/OrxonoxClass.h @ 8834

Last change on this file since 8834 was 8812, checked in by landauf, 13 years ago

removed COUT, CCOUT, and DOUT macros. COUT is now defined as a deprecated function.

  • Property svn:eol-style set to native
File size: 8.8 KB
Line 
1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Fabian 'x3n' Landau
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29/**
30    @defgroup OrxonoxClass OrxonoxClass
31    @ingroup Class
32*/
33
34/**
35    @file
36    @ingroup Class OrxonoxClass
37    @brief Declaration of OrxonoxClass, the base class of all objects and interfaces in Orxonox.
38
39    All objects and interfaces of the game-logic (not the engine) are derived from OrxonoxClass.
40    It stores the Identifier and the MetaObjectList and has all needed functions to create and use the class-hierarchy.
41*/
42
43#ifndef _OrxonoxClass_H__
44#define _OrxonoxClass_H__
45
46#include "CorePrereqs.h"
47
48#include <set>
49#include <vector>
50#include "Super.h"
51
52namespace orxonox
53{
54    /**
55        @brief The class all objects and interfaces of the game-logic (not the engine) are derived from.
56
57        The BaseObject and Interfaces are derived with @c virtual @c public @c OrxonoxClass from OrxonoxClass.
58        OrxonoxClass is needed to create the class-hierarchy at startup and to store the Identifier and the
59        MetaObjectList, as well as to provide an interface for SmartPtr and WeakPtr.
60    */
61    class _CoreExport OrxonoxClass
62    {
63        template <class T>
64        friend class ClassIdentifier;
65
66        template <class T>
67        friend class SmartPtr;
68
69        friend class DestructionListener;
70
71        public:
72            OrxonoxClass();
73            virtual ~OrxonoxClass();
74
75            void destroy();
76            void unregisterObject();
77
78            /// Function to collect the SetConfigValue-macro calls.
79            void setConfigValues() {};
80
81            /// Returns the Identifier of the object.
82            inline Identifier* getIdentifier() const { return this->identifier_; }
83
84            bool isA(const Identifier* identifier);
85            bool isExactlyA(const Identifier* identifier);
86            bool isChildOf(const Identifier* identifier);
87            bool isDirectChildOf(const Identifier* identifier);
88            bool isParentOf(const Identifier* identifier);
89            bool isDirectParentOf(const Identifier* identifier);
90
91            /// Returns true if the object's class is of the given type or a derivative.
92            template <class B> inline bool isA(const SubclassIdentifier<B>* identifier)
93                { return this->isA(*identifier); }
94            /// Returns true if the object's class is exactly of the given type.
95            template <class B> inline bool isExactlyA(const SubclassIdentifier<B>* identifier)
96                { return this->isExactlyA(*identifier); }
97            /// Returns true if the object's class is a child of the given type.
98            template <class B> inline bool isChildOf(const SubclassIdentifier<B>* identifier)
99                { return this->isChildOf(*identifier); }
100            /// Returns true if the object's class is a direct child of the given type.
101            template <class B> inline bool isDirectChildOf(const SubclassIdentifier<B>* identifier)
102                { return this->isDirectChildOf(*identifier); }
103            /// Returns true if the object's class is a parent of the given type.
104            template <class B> inline bool isParentOf(const SubclassIdentifier<B>* identifier)
105                { return this->isParentOf(*identifier); }
106            /// Returns true if the object's class is a direct parent of the given type.
107            template <class B> inline bool isDirectParentOf(const SubclassIdentifier<B>* identifier)
108                { return this->isDirectParentOf(*identifier); }
109
110            bool isA(const OrxonoxClass* object);
111            bool isExactlyA(const OrxonoxClass* object);
112            bool isChildOf(const OrxonoxClass* object);
113            bool isDirectChildOf(const OrxonoxClass* object);
114            bool isParentOf(const OrxonoxClass* object);
115            bool isDirectParentOf(const OrxonoxClass* object);
116
117            virtual void clone(OrxonoxClass*& item) {}
118
119            /// Returns the number of @ref orxonox::SmartPtr "smart pointers" that point to this object.
120            inline unsigned int getReferenceCount() const
121                { return this->referenceCount_; }
122
123            /**
124            @brief
125                Returns a valid pointer of any derived type that is
126                registered in the class hierarchy.
127            @return
128                Returns NULL if the no pointer was found.
129            */
130            ORX_FORCEINLINE void* getDerivedPointer(unsigned int classID)
131            {
132                for (int i = this->objectPointers_.size() - 1; i >= 0; --i)
133                {
134                    if (this->objectPointers_[i].first == classID)
135                        return this->objectPointers_[i].second;
136                }
137                return NULL;
138            }
139
140            /// Version of getDerivedPointer with template
141            template <class T> ORX_FORCEINLINE T* getDerivedPointer(unsigned int classID)
142            {   return static_cast<T*>(this->getDerivedPointer(classID));   }
143            /// Const version of getDerivedPointer with template
144            template <class T> ORX_FORCEINLINE const T* getDerivedPointer(unsigned int classID) const
145            {   return const_cast<OrxonoxClass*>(this)->getDerivedPointer<T>(classID);   }
146
147        protected:
148            /// This virtual function is called if destroy() is called and no SmartPtr points to this object. Used in some cases to create a new SmartPtr to prevent destruction.
149            virtual void preDestroy() {}
150
151        private:
152            /// Increments the reference counter (for smart pointers).
153            inline void incrementReferenceCount()
154                { ++this->referenceCount_; }
155            /// Decrements the reference counter (for smart pointers).
156            inline void decrementReferenceCount()
157            {
158                --this->referenceCount_;
159                if (this->referenceCount_ == 0 && this->requestedDestruction_)
160                    this->destroy();
161            }
162
163            /// Register a destruction listener (for example a weak pointer which points to this object).
164            inline void registerDestructionListener(DestructionListener* pointer)
165                { this->destructionListeners_.insert(pointer); }
166            /// Unegister a destruction listener (for example a weak pointer which pointed to this object before).
167            inline void unregisterDestructionListener(DestructionListener* pointer)
168                { this->destructionListeners_.erase(pointer); }
169
170            Identifier* identifier_;                                //!< The Identifier of the object
171            std::set<const Identifier*>* parents_;                  //!< List of all parents of the object
172            MetaObjectList* metaList_;                              //!< MetaObjectList, containing all ObjectLists and ObjectListElements the object is registered in
173            int referenceCount_;                                    //!< Counts the references from smart pointers to this object
174            bool requestedDestruction_;                             //!< Becomes true after someone called delete on this object
175            std::set<DestructionListener*> destructionListeners_;   //!< All destruction listeners (for example weak pointers which point to this object and like to get notified if it dies)
176
177            /// 'Fast map' that holds this-pointers of all derived types
178            std::vector<std::pair<unsigned int, void*> > objectPointers_;
179    };
180
181    /**
182        @brief This listener is used to inform weak pointers if an object of type OrxonoxClass gets destroyed.
183    */
184    class _CoreExport DestructionListener
185    {
186        friend class OrxonoxClass;
187
188        protected:
189            virtual ~DestructionListener() {}
190
191            inline void registerAsDestructionListener(OrxonoxClass* object)
192                { if (object) { object->registerDestructionListener(this); } }
193            inline void unregisterAsDestructionListener(OrxonoxClass* object)
194                { if (object) { object->unregisterDestructionListener(this); } }
195
196            virtual void objectDeleted() = 0;
197    };
198
199    SUPER_FUNCTION(11, OrxonoxClass, clone, false);
200}
201
202#endif /* _OrxonoxClass_H__ */
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