1 | /* |
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2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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3 | * > www.orxonox.net < |
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4 | * |
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5 | * |
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6 | * License notice: |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU General Public License |
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10 | * as published by the Free Software Foundation; either version 2 |
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11 | * of the License, or (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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21 | * |
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22 | * Author: |
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23 | * Fabian 'x3n' Landau |
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24 | * Co-authors: |
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25 | * ... |
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26 | * |
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27 | */ |
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28 | |
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29 | /** |
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30 | @defgroup Identifier Identifier |
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31 | @ingroup Class |
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32 | */ |
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33 | |
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34 | /** |
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35 | @file |
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36 | @ingroup Class Identifier |
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37 | @brief Declaration of Identifier, definition of ClassIdentifier<T>; used to identify the class of an object. |
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38 | |
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39 | @anchor IdentifierExample |
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40 | |
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41 | An Identifier "identifies" the class of an object. It contains different information about |
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42 | the class: Its name and ID, a list of all instances of this class, a factory to create new |
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43 | instances of this class, and more. |
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44 | |
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45 | It also contains information about the inheritance of this class: It stores a list of the |
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46 | Identifiers of all parent-classes as well as a list of all child-classes. These relationships |
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47 | can be tested using functions like @c isA(), @c isChildOf(), @c isParentOf(), and more. |
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48 | |
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49 | Every Identifier is in fact a ClassIdentifier<T> (where T is the class that is identified |
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50 | by the Identifier), Identifier is just the common base-class. |
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51 | |
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52 | Example: |
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53 | @code |
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54 | MyClass* object = new MyClass(); // create an instance of MyClass |
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55 | |
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56 | object->getIdentifier()->getName(); // returns "MyClass" |
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57 | |
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58 | Identifiable* other = object->getIdentifier()->fabricate(0); // fabricates a new instance of MyClass |
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59 | |
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60 | |
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61 | // test the class hierarchy |
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62 | object->getIdentifier()->isA(Class(MyClass)); // returns true |
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63 | object->isA(Class(MyClass)); // returns true (short version) |
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64 | |
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65 | object->isA(Class(BaseClass)); // returns true if MyClass is a child of BaseClass |
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66 | |
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67 | Class(ChildClass)->isChildOf(object->getIdentifier()); // returns true if ChildClass is a child of MyClass |
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68 | @endcode |
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69 | */ |
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70 | |
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71 | #ifndef _Identifier_H__ |
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72 | #define _Identifier_H__ |
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73 | |
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74 | #include "core/CorePrereqs.h" |
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75 | |
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76 | #include <cassert> |
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77 | #include <map> |
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78 | #include <set> |
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79 | #include <string> |
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80 | #include <typeinfo> |
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81 | #include <loki/TypeTraits.h> |
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82 | |
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83 | #include "util/Output.h" |
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84 | #include "core/object/ObjectList.h" |
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85 | #include "core/object/Listable.h" |
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86 | #include "core/object/Context.h" |
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87 | #include "core/object/Destroyable.h" |
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88 | #include "core/object/WeakPtr.h" |
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89 | #include "IdentifierManager.h" |
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90 | #include "Super.h" |
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91 | |
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92 | namespace orxonox |
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93 | { |
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94 | // ############################### |
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95 | // ### Identifier ### |
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96 | // ############################### |
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97 | /** |
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98 | @brief The Identifier is used to identify the class of an object and to store information about the class. |
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99 | |
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100 | Each Identifier stores information about one class. The Identifier can then be used to identify |
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101 | this class. On the other hand it's also possible to get the corresponding Identifier of a class, |
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102 | for example by using the macro Class(). |
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103 | |
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104 | @see See @ref IdentifierExample "Identifier.h" for more information and some examples. |
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105 | |
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106 | @note You can't directly create an Identifier, it's just the base-class of ClassIdentifier<T>. |
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107 | */ |
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108 | class _CoreExport Identifier : public Destroyable |
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109 | { |
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110 | public: |
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111 | Identifier(); |
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112 | Identifier(const Identifier& identifier); // don't copy |
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113 | virtual ~Identifier(); |
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114 | |
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115 | /// Returns the name of the class the Identifier belongs to. |
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116 | inline const std::string& getName() const { return this->name_; } |
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117 | void setName(const std::string& name); |
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118 | |
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119 | /// Returns the name of the class as it is returned by typeid(T).name() |
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120 | virtual const std::string& getTypeidName() = 0; |
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121 | |
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122 | /// Returns the network ID to identify a class through the network. |
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123 | inline uint32_t getNetworkID() const { return this->networkID_; } |
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124 | void setNetworkID(uint32_t id); |
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125 | |
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126 | /// Returns the unique ID of the class. |
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127 | ORX_FORCEINLINE unsigned int getClassID() const { return this->classID_; } |
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128 | |
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129 | /// Sets the Factory. |
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130 | void setFactory(Factory* factory); |
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131 | /// Returns true if the Identifier has a Factory. |
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132 | inline bool hasFactory() const { return (this->factory_ != 0); } |
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133 | |
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134 | Identifiable* fabricate(Context* context); |
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135 | |
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136 | /// Returns true if the class can be loaded through XML. |
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137 | inline bool isLoadable() const { return this->bLoadable_; } |
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138 | /// Set the class to be loadable through XML or not. |
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139 | inline void setLoadable(bool bLoadable) { this->bLoadable_ = bLoadable; } |
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140 | |
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141 | /// Returns true if the Identifier was completely initialized. |
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142 | inline bool isInitialized() const { return this->bInitialized_; } |
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143 | |
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144 | |
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145 | ///////////////////////////// |
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146 | ////// Class Hierarchy ////// |
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147 | ///////////////////////////// |
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148 | Identifier& inheritsFrom(Identifier* directParent); |
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149 | |
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150 | void initializeParents(const std::set<const Identifier*>& identifiers); |
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151 | void initializeDirectParentsOfAbstractClass(); |
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152 | void finishInitialization(); |
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153 | |
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154 | bool isA(const Identifier* identifier) const; |
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155 | bool isExactlyA(const Identifier* identifier) const; |
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156 | bool isChildOf(const Identifier* identifier) const; |
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157 | bool isDirectChildOf(const Identifier* identifier) const; |
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158 | bool isParentOf(const Identifier* identifier) const; |
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159 | bool isDirectParentOf(const Identifier* identifier) const; |
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160 | |
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161 | /// Returns the parents of the class the Identifier belongs to. |
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162 | inline const std::set<const Identifier*>& getParents() const { return this->parents_; } |
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163 | /// Returns the begin-iterator of the parents-list. |
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164 | inline std::set<const Identifier*>::const_iterator getParentsBegin() const { return this->parents_.begin(); } |
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165 | /// Returns the end-iterator of the parents-list. |
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166 | inline std::set<const Identifier*>::const_iterator getParentsEnd() const { return this->parents_.end(); } |
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167 | |
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168 | /// Returns the children of the class the Identifier belongs to. |
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169 | inline const std::set<const Identifier*>& getChildren() const { return this->children_; } |
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170 | /// Returns the begin-iterator of the children-list. |
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171 | inline std::set<const Identifier*>::const_iterator getChildrenBegin() const { return this->children_.begin(); } |
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172 | /// Returns the end-iterator of the children-list. |
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173 | inline std::set<const Identifier*>::const_iterator getChildrenEnd() const { return this->children_.end(); } |
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174 | |
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175 | /// Returns the direct parents of the class the Identifier belongs to. |
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176 | inline const std::set<const Identifier*>& getDirectParents() const { return this->directParents_; } |
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177 | /// Returns the begin-iterator of the direct-parents-list. |
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178 | inline std::set<const Identifier*>::const_iterator getDirectParentsBegin() const { return this->directParents_.begin(); } |
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179 | /// Returns the end-iterator of the direct-parents-list. |
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180 | inline std::set<const Identifier*>::const_iterator getDirectParentsEnd() const { return this->directParents_.end(); } |
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181 | |
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182 | /// Returns the direct children the class the Identifier belongs to. |
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183 | inline const std::set<const Identifier*>& getDirectChildren() const { return this->directChildren_; } |
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184 | /// Returns the begin-iterator of the direct-children-list. |
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185 | inline std::set<const Identifier*>::const_iterator getDirectChildrenBegin() const { return this->directChildren_.begin(); } |
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186 | /// Returns the end-iterator of the direct-children-list. |
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187 | inline std::set<const Identifier*>::const_iterator getDirectChildrenEnd() const { return this->directChildren_.end(); } |
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188 | |
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189 | |
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190 | ///////////////////////// |
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191 | ///// Config Values ///// |
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192 | ///////////////////////// |
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193 | virtual void updateConfigValues(bool updateChildren = true) const = 0; |
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194 | |
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195 | /// Returns true if this class has at least one config value. |
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196 | inline bool hasConfigValues() const { return this->bHasConfigValues_; } |
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197 | |
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198 | void addConfigValueContainer(const std::string& varname, ConfigValueContainer* container); |
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199 | ConfigValueContainer* getConfigValueContainer(const std::string& varname); |
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200 | |
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201 | |
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202 | /////////////////// |
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203 | ///// XMLPort ///// |
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204 | /////////////////// |
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205 | /// Returns the map that stores all XMLPort params. |
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206 | inline const std::map<std::string, XMLPortParamContainer*>& getXMLPortParamMap() const { return this->xmlportParamContainers_; } |
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207 | /// Returns a const_iterator to the beginning of the map that stores all XMLPort params. |
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208 | inline std::map<std::string, XMLPortParamContainer*>::const_iterator getXMLPortParamMapBegin() const { return this->xmlportParamContainers_.begin(); } |
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209 | /// Returns a const_iterator to the end of the map that stores all XMLPort params. |
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210 | inline std::map<std::string, XMLPortParamContainer*>::const_iterator getXMLPortParamMapEnd() const { return this->xmlportParamContainers_.end(); } |
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211 | |
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212 | /// Returns the map that stores all XMLPort objects. |
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213 | inline const std::map<std::string, XMLPortObjectContainer*>& getXMLPortObjectMap() const { return this->xmlportObjectContainers_; } |
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214 | /// Returns a const_iterator to the beginning of the map that stores all XMLPort objects. |
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215 | inline std::map<std::string, XMLPortObjectContainer*>::const_iterator getXMLPortObjectMapBegin() const { return this->xmlportObjectContainers_.begin(); } |
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216 | /// Returns a const_iterator to the end of the map that stores all XMLPort objects. |
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217 | inline std::map<std::string, XMLPortObjectContainer*>::const_iterator getXMLPortObjectMapEnd() const { return this->xmlportObjectContainers_.end(); } |
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218 | |
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219 | void addXMLPortParamContainer(const std::string& paramname, XMLPortParamContainer* container); |
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220 | XMLPortParamContainer* getXMLPortParamContainer(const std::string& paramname); |
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221 | |
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222 | void addXMLPortObjectContainer(const std::string& sectionname, XMLPortObjectContainer* container); |
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223 | XMLPortObjectContainer* getXMLPortObjectContainer(const std::string& sectionname); |
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224 | |
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225 | |
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226 | protected: |
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227 | virtual void createSuperFunctionCaller() const = 0; |
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228 | |
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229 | private: |
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230 | std::set<const Identifier*> parents_; //!< The parents of the class the Identifier belongs to |
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231 | std::set<const Identifier*> children_; //!< The children of the class the Identifier belongs to |
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232 | |
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233 | std::set<const Identifier*> directParents_; //!< The direct parents of the class the Identifier belongs to |
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234 | std::set<const Identifier*> directChildren_; //!< The direct children of the class the Identifier belongs to |
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235 | |
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236 | bool bInitialized_; //!< Is true if the Identifier was completely initialized |
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237 | bool bLoadable_; //!< False = it's not permitted to load the object through XML |
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238 | std::string name_; //!< The name of the class the Identifier belongs to |
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239 | Factory* factory_; //!< The Factory, able to create new objects of the given class (if available) |
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240 | uint32_t networkID_; //!< The network ID to identify a class through the network |
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241 | const unsigned int classID_; //!< Uniquely identifies a class (might not be the same as the networkID_) |
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242 | |
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243 | bool bHasConfigValues_; //!< True if this class has at least one assigned config value |
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244 | std::map<std::string, ConfigValueContainer*> configValues_; //!< A map to link the string of configurable variables with their ConfigValueContainer |
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245 | |
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246 | std::map<std::string, XMLPortParamContainer*> xmlportParamContainers_; //!< All loadable parameters |
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247 | std::map<std::string, XMLPortObjectContainer*> xmlportObjectContainers_; //!< All attachable objects |
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248 | }; |
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249 | |
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250 | _CoreExport std::ostream& operator<<(std::ostream& out, const std::set<const Identifier*>& list); |
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251 | |
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252 | |
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253 | // ############################### |
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254 | // ### ClassIdentifier ### |
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255 | // ############################### |
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256 | /** |
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257 | @brief The ClassIdentifier is derived from Identifier and holds all class-specific functions and variables the Identifier cannot have. |
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258 | |
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259 | ClassIdentifier is a Singleton, which means that only one ClassIdentifier for a given type T exists. |
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260 | This makes it possible to store information about a class, sharing them with all |
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261 | objects of that class without defining static variables in every class. |
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262 | |
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263 | To be really sure that not more than exactly one object exists (even with libraries), |
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264 | ClassIdentifiers are stored in a static map in Identifier. |
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265 | */ |
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266 | template <class T> |
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267 | class ClassIdentifier : public Identifier |
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268 | { |
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269 | #ifndef DOXYGEN_SHOULD_SKIP_THIS |
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270 | #define SUPER_INTRUSIVE_DECLARATION_INCLUDE |
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271 | #include "Super.h" |
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272 | #endif |
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273 | |
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274 | public: |
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275 | static ClassIdentifier<T>* getIdentifier(); |
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276 | static ClassIdentifier<T>* getIdentifier(const std::string& name); |
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277 | |
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278 | bool initializeObject(T* object); |
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279 | |
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280 | void setConfigValues(T* object, Configurable*) const; |
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281 | void setConfigValues(T* object, Identifiable*) const; |
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282 | |
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283 | void addObjectToList(T* object, Listable*); |
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284 | void addObjectToList(T* object, Identifiable*); |
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285 | |
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286 | virtual void updateConfigValues(bool updateChildren = true) const; |
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287 | |
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288 | virtual const std::string& getTypeidName() |
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289 | { return this->typeidName_; } |
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290 | |
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291 | private: |
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292 | static void initializeIdentifier(); |
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293 | |
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294 | ClassIdentifier(const ClassIdentifier<T>& identifier) {} // don't copy |
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295 | ClassIdentifier() |
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296 | { |
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297 | this->typeidName_ = typeid(T).name(); |
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298 | SuperFunctionInitialization<0, T>::initialize(this); |
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299 | } |
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300 | ~ClassIdentifier() |
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301 | { |
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302 | SuperFunctionDestruction<0, T>::destroy(this); |
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303 | } |
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304 | |
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305 | void updateConfigValues(bool updateChildren, Listable*) const; |
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306 | void updateConfigValues(bool updateChildren, Identifiable*) const; |
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307 | |
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308 | std::string typeidName_; |
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309 | static WeakPtr<ClassIdentifier<T> > classIdentifier_s; |
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310 | }; |
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311 | |
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312 | template <class T> |
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313 | WeakPtr<ClassIdentifier<T> > ClassIdentifier<T>::classIdentifier_s; |
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314 | |
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315 | /** |
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316 | @brief Returns the only instance of this class. |
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317 | @return The unique Identifier |
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318 | */ |
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319 | template <class T> |
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320 | inline ClassIdentifier<T>* ClassIdentifier<T>::getIdentifier() |
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321 | { |
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322 | // check if the Identifier already exists |
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323 | if (!ClassIdentifier<T>::classIdentifier_s) |
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324 | ClassIdentifier<T>::initializeIdentifier(); |
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325 | |
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326 | return ClassIdentifier<T>::classIdentifier_s; |
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327 | } |
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328 | |
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329 | /** |
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330 | @brief Does the same as getIdentifier() but sets the name if this wasn't done yet. |
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331 | @param name The name of this Identifier |
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332 | @return The Identifier |
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333 | */ |
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334 | template <class T> |
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335 | inline ClassIdentifier<T>* ClassIdentifier<T>::getIdentifier(const std::string& name) |
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336 | { |
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337 | ClassIdentifier<T>* identifier = ClassIdentifier<T>::getIdentifier(); |
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338 | identifier->setName(name); |
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339 | return identifier; |
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340 | } |
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341 | |
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342 | /** |
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343 | @brief Assigns the static field for the identifier singleton. |
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344 | */ |
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345 | template <class T> |
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346 | /*static */ void ClassIdentifier<T>::initializeIdentifier() |
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347 | { |
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348 | // create a new identifier anyway. Will be deleted if not used. |
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349 | ClassIdentifier<T>* proposal = new ClassIdentifier<T>(); |
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350 | |
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351 | // Get the entry from the map |
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352 | ClassIdentifier<T>::classIdentifier_s = (ClassIdentifier<T>*)IdentifierManager::getInstance().getGloballyUniqueIdentifier(proposal); |
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353 | |
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354 | if (ClassIdentifier<T>::classIdentifier_s == proposal) |
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355 | orxout(verbose, context::identifier) << "Requested Identifier for " << proposal->getTypeidName() << " was not yet existing and got created." << endl; |
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356 | else |
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357 | { |
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358 | orxout(verbose, context::identifier) << "Requested Identifier for " << proposal->getTypeidName() << " was already existing and got assigned." << endl; |
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359 | delete proposal; // delete proposal (it is not used anymore) |
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360 | } |
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361 | } |
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362 | |
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363 | /** |
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364 | @brief Adds an object of the given type to the ObjectList. |
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365 | @param object The object to add |
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366 | */ |
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367 | template <class T> |
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368 | bool ClassIdentifier<T>::initializeObject(T* object) |
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369 | { |
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370 | orxout(verbose, context::object_list) << "Register Object: " << this->getName() << endl; |
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371 | |
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372 | object->identifier_ = this; |
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373 | if (IdentifierManager::getInstance().isCreatingHierarchy()) |
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374 | { |
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375 | IdentifierManager::getInstance().createdObject(object); |
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376 | |
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377 | this->setConfigValues(object, object); |
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378 | return true; |
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379 | } |
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380 | else |
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381 | { |
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382 | this->addObjectToList(object, object); |
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383 | |
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384 | // Add pointer of type T to the map in the Identifiable instance that enables "dynamic_casts" |
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385 | object->objectPointers_.push_back(std::make_pair(this->getClassID(), static_cast<void*>(object))); |
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386 | return false; |
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387 | } |
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388 | } |
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389 | |
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390 | /** |
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391 | * @brief Only configures the object if is a @ref Configurable |
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392 | */ |
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393 | template <class T> |
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394 | void ClassIdentifier<T>::setConfigValues(T* object, Configurable*) const |
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395 | { |
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396 | object->setConfigValues(); |
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397 | } |
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398 | |
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399 | template <class T> |
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400 | void ClassIdentifier<T>::setConfigValues(T*, Identifiable*) const |
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401 | { |
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402 | // no action |
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403 | } |
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404 | |
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405 | /** |
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406 | * @brief Only adds the object to the object list if is a @ref Listable |
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407 | */ |
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408 | template <class T> |
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409 | void ClassIdentifier<T>::addObjectToList(T* object, Listable* listable) |
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410 | { |
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411 | if (listable->getContext()) |
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412 | listable->getContext()->addObject(object); |
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413 | } |
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414 | |
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415 | template <class T> |
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416 | void ClassIdentifier<T>::addObjectToList(T*, Identifiable*) |
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417 | { |
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418 | // no action |
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419 | } |
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420 | |
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421 | /** |
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422 | @brief Updates the config-values of all existing objects of this class by calling their setConfigValues() function. |
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423 | */ |
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424 | template <class T> |
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425 | void ClassIdentifier<T>::updateConfigValues(bool updateChildren) const |
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426 | { |
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427 | this->updateConfigValues(updateChildren, static_cast<T*>(NULL)); |
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428 | } |
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429 | |
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430 | template <class T> |
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431 | void ClassIdentifier<T>::updateConfigValues(bool updateChildren, Listable*) const |
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432 | { |
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433 | if (!this->hasConfigValues()) |
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434 | return; |
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435 | |
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436 | for (ObjectListIterator<T> it = ObjectList<T>::begin(); it; ++it) |
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437 | this->setConfigValues(*it, *it); |
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438 | |
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439 | if (updateChildren) |
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440 | for (std::set<const Identifier*>::const_iterator it = this->getChildrenBegin(); it != this->getChildrenEnd(); ++it) |
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441 | (*it)->updateConfigValues(false); |
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442 | } |
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443 | |
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444 | template <class T> |
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445 | void ClassIdentifier<T>::updateConfigValues(bool updateChildren, Identifiable*) const |
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446 | { |
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447 | // no action |
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448 | } |
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449 | |
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450 | |
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451 | // ############################### |
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452 | // ### orxonox_cast ### |
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453 | // ############################### |
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454 | /** |
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455 | @brief |
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456 | Casts on object of type Identifiable to any derived type that is |
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457 | registered in the class hierarchy. |
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458 | @return |
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459 | Returns NULL if the cast is not possible |
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460 | @note |
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461 | In case of NULL return (and using MSVC), a dynamic_cast might still be possible if |
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462 | a class forgot to register its objects. |
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463 | Also note that the function is implemented differently for GCC/MSVC. |
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464 | */ |
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465 | template <class T, class U> |
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466 | ORX_FORCEINLINE T orxonox_cast(U* source) |
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467 | { |
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468 | #ifdef ORXONOX_COMPILER_MSVC |
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469 | typedef Loki::TypeTraits<typename Loki::TypeTraits<T>::PointeeType>::NonConstType ClassType; |
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470 | if (source != NULL) |
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471 | return source->template getDerivedPointer<ClassType>(ClassIdentifier<ClassType>::getIdentifier()->getClassID()); |
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472 | else |
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473 | return NULL; |
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474 | #else |
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475 | return dynamic_cast<T>(source); |
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476 | #endif |
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477 | } |
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478 | } |
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479 | |
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480 | #endif /* _Identifier_H__ */ |
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