[1505] | 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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[2171] | 30 | @file |
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[7363] | 31 | @ingroup Object ObjectList |
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[1505] | 32 | @brief Definition and implementation of the Iterator class. |
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| 33 | |
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[1747] | 34 | The Iterator of a given class allows to iterate through an ObjectList. Objects in |
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[7271] | 35 | this list are cast to the template argument of the Iterator. |
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[1505] | 36 | |
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| 37 | Usage: |
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[1854] | 38 | for (Iterator<myClass> it = anyidentifier->getObjects()->begin(); it != anyidentifier->getObjects()->end(); ++it) |
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[1505] | 39 | { |
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| 40 | it->someFunction(...); |
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[1747] | 41 | myClass* myObject = *it; |
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[1505] | 42 | } |
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| 43 | */ |
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| 44 | |
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| 45 | #ifndef _Iterator_H__ |
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| 46 | #define _Iterator_H__ |
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| 47 | |
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| 48 | #include "CorePrereqs.h" |
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| 49 | |
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[3196] | 50 | #include "Identifier.h" |
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[1747] | 51 | #include "ObjectListBase.h" |
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[1505] | 52 | |
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| 53 | namespace orxonox |
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| 54 | { |
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[1747] | 55 | //! The Iterator allows to iterate through a given ObjectList |
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| 56 | template <class T = OrxonoxClass> |
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[1505] | 57 | class Iterator |
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| 58 | { |
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| 59 | public: |
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| 60 | /** |
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| 61 | @brief Constructor: Sets the element, whereon the iterator points, to zero. |
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| 62 | */ |
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[1747] | 63 | inline Iterator() |
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[1505] | 64 | { |
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| 65 | this->element_ = 0; |
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[1747] | 66 | this->list_ = 0; |
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[1505] | 67 | } |
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| 68 | |
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| 69 | /** |
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[1747] | 70 | @brief Constructor: Sets this element to the exported element. |
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| 71 | @param exp The exported element |
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[1505] | 72 | */ |
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[1747] | 73 | inline Iterator(const ObjectListBase::Export& exp) |
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[1505] | 74 | { |
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[1747] | 75 | this->element_ = exp.element_; |
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| 76 | this->list_ = exp.list_; |
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[2784] | 77 | this->list_->registerIterator(this); |
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[1505] | 78 | } |
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| 79 | |
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| 80 | /** |
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[1747] | 81 | @brief Constructor: Sets this element to the element of another Iterator. |
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| 82 | @param other The other Iterator |
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| 83 | */ |
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| 84 | inline Iterator(const Iterator<T>& other) |
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| 85 | { |
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| 86 | this->element_ = other.element_; |
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| 87 | this->list_ = other.list_; |
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[2784] | 88 | this->list_->registerIterator(this); |
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[1747] | 89 | } |
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| 90 | |
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| 91 | /** |
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| 92 | @brief Constructor: Sets this element to a given element |
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| 93 | @param element The element |
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| 94 | */ |
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| 95 | template <class O> |
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| 96 | inline Iterator(ObjectListElement<O>* element) |
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| 97 | { |
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[7271] | 98 | this->element_ = element; |
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[1747] | 99 | this->list_ = ClassIdentifier<O>::getIdentifier()->getObjects(); |
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[2784] | 100 | this->list_->registerIterator(this); |
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[1747] | 101 | } |
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| 102 | |
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| 103 | /** |
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| 104 | @brief Constructor: Sets this element to the element an ObjectListIterator. |
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| 105 | @param other The ObjectListIterator |
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| 106 | */ |
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| 107 | template <class O> |
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| 108 | inline Iterator(const ObjectListIterator<O>& other) |
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| 109 | { |
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[7271] | 110 | this->element_ = other.element_; |
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[1747] | 111 | this->list_ = ClassIdentifier<O>::getIdentifier()->getObjects(); |
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[2784] | 112 | this->list_->registerIterator(this); |
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[1747] | 113 | } |
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| 114 | |
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| 115 | /** |
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[1505] | 116 | @brief Unregisters the Iterator from the ObjectList. |
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| 117 | */ |
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[1747] | 118 | inline ~Iterator() |
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[1505] | 119 | { |
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[2784] | 120 | this->list_->unregisterIterator(this); |
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[1505] | 121 | } |
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| 122 | |
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| 123 | /** |
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[1747] | 124 | @brief Assigns an exported element. |
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| 125 | @param exp The exported element |
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| 126 | */ |
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[7268] | 127 | inline Iterator<T>& operator=(const ObjectListBase::Export& exp) |
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[1747] | 128 | { |
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| 129 | if (this->list_) |
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[2784] | 130 | this->list_->unregisterIterator(this); |
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[1747] | 131 | |
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| 132 | this->element_ = exp.element_; |
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| 133 | this->list_ = exp.list_; |
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[2784] | 134 | this->list_->registerIterator(this); |
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[1747] | 135 | |
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| 136 | return (*this); |
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| 137 | } |
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| 138 | |
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| 139 | /** |
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| 140 | @brief Assigns the element of another Iterator. |
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| 141 | @param other The other Iterator |
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| 142 | */ |
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[7268] | 143 | inline Iterator<T>& operator=(const Iterator<T>& other) |
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[1747] | 144 | { |
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| 145 | if (this->list_) |
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[2784] | 146 | this->list_->unregisterIterator(this); |
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[1747] | 147 | |
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| 148 | this->element_ = other.element_; |
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| 149 | this->list_ = other.list_; |
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[2784] | 150 | this->list_->registerIterator(this); |
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[1747] | 151 | |
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| 152 | return (*this); |
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| 153 | } |
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| 154 | |
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| 155 | /** |
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| 156 | @brief Assigns a given element. |
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[1505] | 157 | @param element The element |
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| 158 | */ |
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[1747] | 159 | template <class O> |
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[7268] | 160 | inline Iterator<T>& operator=(ObjectListElement<O>* element) |
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[1505] | 161 | { |
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[1747] | 162 | if (this->list_) |
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[2784] | 163 | this->list_->unregisterIterator(this); |
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[1747] | 164 | |
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[7271] | 165 | this->element_ = element; |
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[1747] | 166 | this->list_ = ClassIdentifier<O>::getIdentifier()->getObjects(); |
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[2784] | 167 | this->list_->registerIterator(this); |
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[1747] | 168 | |
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| 169 | return (*this); |
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[1505] | 170 | } |
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| 171 | |
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| 172 | /** |
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[1747] | 173 | @brief Assigns the element of an ObjectListIterator. |
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| 174 | @param other The ObjectListIterator |
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| 175 | */ |
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| 176 | template <class O> |
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[7268] | 177 | inline Iterator<T>& operator=(const ObjectListIterator<O>& other) |
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[1747] | 178 | { |
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| 179 | if (this->list_) |
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[2784] | 180 | this->list_->unregisterIterator(this); |
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[1747] | 181 | |
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[7271] | 182 | this->element_ = other.element_; |
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[1747] | 183 | this->list_ = ClassIdentifier<O>::getIdentifier()->getObjects(); |
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[2784] | 184 | this->list_->registerIterator(this); |
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[1747] | 185 | |
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| 186 | return (*this); |
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| 187 | } |
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| 188 | |
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| 189 | /** |
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[1505] | 190 | @brief Overloading of the ++it operator: Iterator points to the next object in the list. |
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| 191 | @return The Iterator itself |
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| 192 | */ |
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[1747] | 193 | inline const Iterator<T>& operator++() |
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[1505] | 194 | { |
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[5929] | 195 | this->element_ = this->element_->next_; |
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[1505] | 196 | return *this; |
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| 197 | } |
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| 198 | |
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| 199 | /** |
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| 200 | @brief Overloading of the it++ operator: Iterator points to the next object in the list. |
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| 201 | @return The Iterator itself |
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| 202 | */ |
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[7323] | 203 | inline Iterator<T> operator++(int) |
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[1505] | 204 | { |
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| 205 | Iterator<T> copy = *this; |
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[5929] | 206 | this->element_ = this->element_->next_; |
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[1505] | 207 | return copy; |
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| 208 | } |
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| 209 | |
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| 210 | /** |
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| 211 | @brief Overloading of the --it operator: Iterator points to the previous object in the list. |
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| 212 | @return The Iterator itself |
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| 213 | */ |
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[1747] | 214 | inline const Iterator<T>& operator--() |
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[1505] | 215 | { |
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[5929] | 216 | this->element_ = this->element_->prev_; |
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[1505] | 217 | return *this; |
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| 218 | } |
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| 219 | |
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| 220 | /** |
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| 221 | @brief Overloading of the it-- operator: Iterator points to the previous object in the list. |
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| 222 | @return The Iterator itself |
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| 223 | */ |
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[1747] | 224 | inline Iterator<T> operator--(int i) |
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[1505] | 225 | { |
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| 226 | Iterator<T> copy = *this; |
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[5929] | 227 | this->element_ = this->element_->prev_; |
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[1505] | 228 | return copy; |
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| 229 | } |
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| 230 | |
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| 231 | /** |
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| 232 | @brief Overloading of the *it operator: returns the pointer to the object. |
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| 233 | @return The object the Iterator points at |
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| 234 | */ |
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[1747] | 235 | inline T* operator*() const |
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[1505] | 236 | { |
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[5929] | 237 | return orxonox_cast<T*>(this->element_->objectBase_); |
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[1505] | 238 | } |
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| 239 | |
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| 240 | /** |
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| 241 | @brief Overloading of the it-> operator: returns the pointer to the object. |
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| 242 | @return The object the Iterator points at |
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| 243 | */ |
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[1747] | 244 | inline T* operator->() const |
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[1505] | 245 | { |
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[5929] | 246 | return orxonox_cast<T*>(this->element_->objectBase_); |
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[1505] | 247 | } |
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| 248 | |
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| 249 | /** |
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| 250 | @brief Overloading of the typecast-operator to bool: returns true if the iterator points to an existing object. |
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[1747] | 251 | @return True if the Iterator points to an existing object. |
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[1505] | 252 | */ |
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[1747] | 253 | inline operator bool() const |
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[1505] | 254 | { |
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| 255 | return (this->element_ != 0); |
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| 256 | } |
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| 257 | |
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| 258 | /** |
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[1747] | 259 | @brief Overloading of the == operator to compare with another Iterator. |
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| 260 | @param compare The other Iterator |
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| 261 | @return True if the iterators point to the same element |
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[1505] | 262 | */ |
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[1747] | 263 | inline bool operator==(const Iterator<T>& compare) const |
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[1505] | 264 | { |
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[1747] | 265 | return (this->element_ == compare.element_); |
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[1505] | 266 | } |
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| 267 | |
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[1747] | 268 | /** |
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| 269 | @brief Overloading of the != operator to compare with another Iterator. |
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| 270 | @param compare The other Iterator |
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| 271 | @return True if the iterators point to different elements |
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| 272 | */ |
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| 273 | inline bool operator!=(const Iterator<T>& compare) const |
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| 274 | { |
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| 275 | return (this->element_ != compare.element_); |
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| 276 | } |
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| 277 | |
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| 278 | /** |
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| 279 | @brief Increments the Iterator if it points at the given object. |
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| 280 | @param object The object to compare with |
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| 281 | */ |
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| 282 | inline void incrementIfEqual(OrxonoxClass* object) |
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| 283 | { |
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| 284 | if (this->element_ && this->element_->objectBase_ == object) |
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| 285 | this->operator++(); |
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| 286 | } |
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| 287 | |
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| 288 | protected: |
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| 289 | ObjectListBaseElement* element_; //!< The element the Iterator points at |
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| 290 | ObjectListBase* list_; //!< The list wherein the element is |
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[1505] | 291 | }; |
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[1747] | 292 | |
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| 293 | typedef Iterator<OrxonoxClass> BaseIterator; |
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[1505] | 294 | } |
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| 295 | |
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| 296 | #endif /* _Iterator_H__ */ |
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