1 | // |
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2 | // StrategyCollection.h |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/include/Poco/StrategyCollection.h#1 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: Cache |
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8 | // Module: StrategyCollection |
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9 | // |
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10 | // Definition of the StrategyCollection class. |
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11 | // |
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12 | // Copyright (c) 2006, Applied Informatics Software Engineering GmbH. |
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13 | // and Contributors. |
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14 | // |
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15 | // Permission is hereby granted, free of charge, to any person or organization |
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16 | // obtaining a copy of the software and accompanying documentation covered by |
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17 | // this license (the "Software") to use, reproduce, display, distribute, |
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18 | // execute, and transmit the Software, and to prepare derivative works of the |
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19 | // Software, and to permit third-parties to whom the Software is furnished to |
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20 | // do so, all subject to the following: |
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21 | // |
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22 | // The copyright notices in the Software and this entire statement, including |
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23 | // the above license grant, this restriction and the following disclaimer, |
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24 | // must be included in all copies of the Software, in whole or in part, and |
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25 | // all derivative works of the Software, unless such copies or derivative |
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26 | // works are solely in the form of machine-executable object code generated by |
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27 | // a source language processor. |
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28 | // |
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29 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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30 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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31 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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32 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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33 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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34 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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35 | // DEALINGS IN THE SOFTWARE. |
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36 | // |
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37 | |
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38 | |
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39 | #ifndef Foundation_StrategyCollection_INCLUDED |
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40 | #define Foundation_StrategyCollection_INCLUDED |
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41 | |
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42 | |
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43 | #include "Poco/KeyValueArgs.h" |
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44 | #include "Poco/ValidArgs.h" |
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45 | #include "Poco/AbstractStrategy.h" |
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46 | #include "Poco/SharedPtr.h" |
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47 | #include <vector> |
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48 | |
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49 | |
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50 | namespace Poco { |
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51 | |
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52 | |
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53 | template <class TKey, class TValue> |
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54 | class StrategyCollection: public AbstractStrategy<TKey, TValue> |
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55 | /// An StrategyCollection is a decorator masking n collections as a single one |
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56 | { |
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57 | public: |
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58 | typedef std::vector<SharedPtr<AbstractStrategy<TKey, TValue> > > Strategies; |
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59 | typedef typename Strategies::iterator Iterator; |
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60 | typedef typename Strategies::const_iterator ConstIterator; |
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61 | |
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62 | public: |
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63 | StrategyCollection() |
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64 | { |
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65 | } |
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66 | |
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67 | ~StrategyCollection() |
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68 | { |
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69 | } |
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70 | |
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71 | void pushBack(AbstractStrategy<TKey, TValue>* pStrat) |
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72 | /// Adds an AbstractStrategy to the collection. Class takes ownership of pointer |
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73 | { |
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74 | _strategies.push_back(SharedPtr<AbstractStrategy<TKey, TValue> >(pStrat)); |
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75 | } |
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76 | |
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77 | void popBack() |
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78 | /// Removes the last added AbstractStrategy from the collection. |
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79 | { |
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80 | _strategies.pop_back(); |
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81 | } |
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82 | |
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83 | void onAdd(const void* pSender, const KeyValueArgs <TKey, TValue>& key) |
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84 | /// Adds the key to the strategy. |
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85 | /// If for the key already an entry exists, it will be overwritten. |
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86 | { |
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87 | Iterator it = _strategies.begin(); |
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88 | Iterator endIt = _strategies.end(); |
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89 | for (; it != endIt; ++it) |
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90 | { |
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91 | (*it)->onAdd(pSender, key); |
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92 | } |
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93 | } |
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94 | |
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95 | void onRemove(const void* pSender, const TKey& key) |
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96 | /// Removes an entry from the strategy. If the entry is not found |
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97 | /// the remove is ignored. |
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98 | { |
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99 | Iterator it = _strategies.begin(); |
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100 | Iterator endIt = _strategies.end(); |
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101 | for (; it != endIt; ++it) |
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102 | { |
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103 | (*it)->onRemove(pSender, key); |
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104 | } |
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105 | } |
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106 | |
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107 | void onGet(const void* pSender, const TKey& key) |
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108 | { |
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109 | Iterator it = _strategies.begin(); |
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110 | Iterator endIt = _strategies.end(); |
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111 | for (; it != endIt; ++it) |
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112 | { |
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113 | (*it)->onGet(pSender, key); |
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114 | } |
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115 | } |
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116 | |
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117 | void onClear(const void* pSender, const EventArgs& args) |
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118 | { |
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119 | Iterator it = _strategies.begin(); |
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120 | Iterator endIt = _strategies.end(); |
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121 | for (; it != endIt; ++it) |
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122 | { |
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123 | (*it)->onClear(pSender, args); |
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124 | } |
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125 | } |
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126 | |
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127 | void onIsValid(const void* pSender, ValidArgs<TKey>& key) |
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128 | { |
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129 | Iterator it = _strategies.begin(); |
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130 | Iterator endIt = _strategies.end(); |
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131 | for (; it != endIt && key.isValid(); ++it) |
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132 | { |
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133 | (*it)->onIsValid(pSender, key); |
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134 | } |
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135 | } |
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136 | |
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137 | void onReplace(const void* pSender, std::set<TKey>& elemsToRemove) |
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138 | { |
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139 | Iterator it = _strategies.begin(); |
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140 | Iterator endIt = _strategies.end(); |
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141 | for (; it != endIt; ++it) |
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142 | { |
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143 | (*it)->onReplace(pSender, elemsToRemove); |
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144 | } |
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145 | } |
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146 | |
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147 | protected: |
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148 | Strategies _strategies; |
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149 | }; |
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150 | |
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151 | |
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152 | } // namespace Poco |
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153 | |
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154 | |
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155 | #endif |
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