1 | /*! |
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2 | \file |
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3 | \brief UI (user info) class for loading/saving objects from/to configuration files. |
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4 | It is designed with use of libconfig C/C++ Configuration File Library |
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5 | \ref ui |
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6 | \author Vaclav Smidl. |
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7 | |
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8 | ----------------------------------- |
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9 | BDM++ - C++ library for Bayesian Decision Making under Uncertainty |
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10 | |
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11 | Using IT++ for numerical operations |
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12 | ----------------------------------- |
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13 | */ |
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14 | |
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15 | #ifndef USER_INFO_H |
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16 | #define USER_INFO_H |
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17 | |
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18 | #include <stdio.h> |
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19 | #include <string> |
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20 | #include <typeinfo> |
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21 | #include <map> |
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22 | #include <stdexcept> |
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23 | |
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24 | #include "../bdmroot.h" |
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25 | #include "../shared_ptr.h" |
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26 | #include "itpp/itbase.h" |
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27 | #include "../math/square_mat.h" |
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28 | #include "../math/chmat.h" |
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29 | |
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30 | using std::string; |
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31 | using namespace std; |
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32 | using namespace libconfig; |
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33 | |
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34 | namespace bdm { |
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35 | |
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36 | //! Generic exception for reporting configuration errors |
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37 | //! |
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38 | //! \ref ui |
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39 | class UIException : public std::exception { |
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40 | private: |
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41 | //! Error message |
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42 | const string message; |
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43 | |
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44 | public: |
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45 | /*! |
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46 | \brief The constructor |
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47 | \param message the reason for throwing the exception. Should be a complete English sentence (or a couple sentences), starting with "UIException: ". |
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48 | */ |
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49 | UIException ( const string &message ) : |
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50 | message ( message ) { |
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51 | } |
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52 | |
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53 | //! Overriden method for reporting the error message |
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54 | virtual const char* what() const throw() { |
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55 | return message.c_str(); |
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56 | } |
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57 | |
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58 | ~UIException() throw() {}; |
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59 | |
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60 | protected: |
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61 | /*! |
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62 | Formats error messages for derived classes, which use a |
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63 | Setting path in addition to the message. |
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64 | */ |
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65 | static string format_message ( const string &reason, const string &path ); |
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66 | }; |
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67 | |
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68 | //! Exception for reporting configuration errors related to some concrete Setting path |
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69 | //! |
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70 | //! \ref ui |
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71 | class UISettingException : public UIException { |
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72 | public: |
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73 | //! Use this constructor when you can pass the problematical Setting as a parameter |
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74 | UISettingException ( const string &message, const Setting &element ) : |
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75 | UIException ( format_message ( message, string ( element.getPath() ) ) ) { |
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76 | } |
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77 | |
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78 | //! This constructor is for other occasions, when only path of problematical Setting is known |
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79 | UISettingException ( const string &message, const string &path ) : |
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80 | UIException ( format_message ( message, path ) ) { |
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81 | } |
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82 | |
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83 | ~UISettingException() throw() {}; |
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84 | }; |
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85 | |
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86 | //! Exception for reporting configuration errors in the "class" attribute |
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87 | //! |
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88 | //! \ref ui |
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89 | class UIClassException : public UIException { |
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90 | public: |
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91 | //! Use this constructor when you can pass the problematical Setting as a parameter |
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92 | UIClassException ( const string &message, const Setting &element ) : |
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93 | UIException ( format_message ( message, string ( element.getPath() ) ) ) { |
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94 | } |
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95 | |
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96 | //! This constructor is for other occasions, when only path of problematical Setting is known |
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97 | UIClassException ( const string &message, const string &path ) : |
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98 | UIException ( format_message ( message, path ) ) { |
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99 | } |
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100 | |
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101 | ~UIClassException() throw() {}; |
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102 | }; |
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103 | |
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104 | /*! |
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105 | @brief This class serves to load and/or save user-infos into/from |
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106 | configuration files stored on a hard-disk. |
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107 | |
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108 | Firstly, save some user-infos into the new UIFile instance. Then, |
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109 | call the save method with a filename as its only argument: |
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110 | |
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111 | \code |
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112 | CAudi audi; |
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113 | UIFile file; |
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114 | UI::save( audi, file, "TT"); |
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115 | file.save("cars.cfg"); |
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116 | \endcode |
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117 | |
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118 | In the other way round, when loading object from a configuration file, |
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119 | the appropriate code looks like this: |
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120 | |
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121 | \code |
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122 | UIFile file("cars.cfg"); |
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123 | CAudi *audi = UI::build<CAudi>(file,"TT"); |
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124 | \endcode |
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125 | |
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126 | \ref ui |
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127 | */ |
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128 | class UIFile : public Config { |
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129 | public: |
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130 | //! Create empty file instance prepared to store Settings |
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131 | UIFile(); |
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132 | |
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133 | //! Creates instance and fills it from the configuration file file_name |
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134 | UIFile ( const string &file_name ); |
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135 | |
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136 | //! Save all the stored Settings into the configuration file file_name |
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137 | void save ( const string &file_name ); |
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138 | |
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139 | //! This operator allows the ability of substituting Setting parameter by UIFile instance |
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140 | operator Setting&(); |
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141 | }; |
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142 | |
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143 | /*! |
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144 | @brief This class serves to expand links used within configuration files. |
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145 | |
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146 | Value of any type but string can be linked to some other value of the same type |
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147 | defined elsewhere in the current configuration file or even in some different |
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148 | configuration file. |
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149 | |
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150 | Link have three parts, \<name\> : \<path\> \<\@filename\>. Field \<name\> contains the |
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151 | name of the new setting, \<path\> is the relative path to the referenced setting, which |
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152 | has to be taken from the %root Setting element. The last part \<\@filename\> is optional, |
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153 | it contains filename in the case the link should refer to a variable stored in a different |
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154 | file. From the previous part \<path\>, it has to be separated by '@'. |
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155 | |
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156 | \code |
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157 | ... |
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158 | jardovo : |
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159 | { |
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160 | class = "Car"; |
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161 | year = 1992; |
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162 | manufacturer = "liaz"; |
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163 | kilometers = 1555000; |
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164 | }; |
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165 | ondrejovo : |
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166 | { |
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167 | class = "Bike"; |
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168 | year = 1996; |
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169 | manufacturer = "author"; |
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170 | electricLights = true; |
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171 | matr = ( 2, 2, [ 1.0, 0.0, 0.0, 1.0 ] ); |
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172 | }; |
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173 | |
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174 | #this is the example of local link to another mean of transport |
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175 | elisky = "jardovo"; |
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176 | |
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177 | ... |
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178 | |
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179 | # And this link is external link pointing to the file "other_cars.cfg" stored in the |
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180 | # same directory. In that file, it refers to the local Setting "magic_cars.skubankovo". |
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181 | kati = "magic_cars.skubankovo@other_cars.cfg"; |
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182 | |
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183 | ... |
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184 | \endcode |
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185 | |
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186 | When you want to expand a possible linked setting "element" within your code, it has to be treated this way: |
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187 | |
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188 | \code |
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189 | ... |
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190 | |
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191 | const SettingResolver link( element ); |
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192 | |
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193 | ... |
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194 | |
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195 | int len = link.result.getLength(); |
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196 | |
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197 | ... |
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198 | \endcode |
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199 | |
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200 | The whole point is that a resolved link (class member #result, i.e., "link.result" in the previous example) could point |
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201 | into a different configuration file. In that case there has to be an UIFile instance managing reading from this |
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202 | file. As the libconfig::Config deletes all its Settings when dealocated, UIFile must not be dealocated until all |
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203 | the necessary operation on the linked Setting are finished (otherwise, the link #result would be invalid just after |
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204 | the UIFile dealocation). And that is exactly the mechanism implemented within SettingResolver class. It assures, |
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205 | that the #result Setting reference is valid within the scope of SettingResolver instance. |
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206 | |
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207 | \ref ui |
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208 | */ |
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209 | class SettingResolver : root { |
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210 | private: |
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211 | //! If necessary, this pointer stores an addres of an opened UIFile, else it equals NULL |
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212 | UIFile *file; |
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213 | |
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214 | //! This method initialize #result reference, i.e., it executes the main code of SettingResolver class |
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215 | //! |
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216 | //! This code could be also located directly in constructor. The only reason why we made this |
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217 | //! method is the keyword 'const' within the declaration of #result reference . Such a reference |
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218 | //! have to be intialized before any other constructor command, exactly in the way it is implemented now. |
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219 | const Setting &initialize_reference ( UIFile* &file, const Setting &potential_link ); |
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220 | |
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221 | public: |
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222 | //! Reference to a resolved link or to the original Setting in the case it does not contain a link |
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223 | const Setting &result; |
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224 | |
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225 | //! If potential_link contains a link to some other setting, it is resolved here. Anyway, the Setting reference #result is prepared for use. |
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226 | SettingResolver ( const Setting &potential_link ); |
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227 | |
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228 | //! An opened UIFile file is closed here if necessary. |
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229 | ~SettingResolver(); |
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230 | }; |
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231 | |
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232 | |
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233 | |
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234 | /*! |
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235 | @brief UI is an abstract class which collects all the auxiliary functions useful to prepare some concrete |
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236 | user-infos. |
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237 | |
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238 | See static methods 'build', 'get' and 'save'. Writing user-infos with these methods is rather simple. The |
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239 | rest of this class is intended for internal purposes only. Its meaning is to allow pointers to its templated |
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240 | descendant ParticularUI<T>. |
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241 | |
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242 | \ref ui |
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243 | */ |
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244 | class UI { |
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245 | private: |
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246 | //! Class with state shared across all its instances ("monostate"), encapsulating two maps, one mapping names to UI instances and the other mapping type_infos to class names |
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247 | //! |
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248 | //! The key property of this class is that it initializes the internal maps on global init, |
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249 | //! before the instance is used for a first time. Therefore, we do not have to care about initialization |
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250 | //! during a call of UIREGISTER macro operating with both these mappings. |
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251 | class MappedUI { |
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252 | private: |
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253 | //! Type definition of mapping which transforms class names to the related UI instances |
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254 | typedef map< const string, const UI* const > StringToUIMap; |
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255 | |
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256 | //! Type definition of mapping which transforms RTTI type_infos to the related class names |
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257 | typedef map< const type_info * const, const string > TypeInfoToStringMap; |
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258 | |
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259 | //! Immediately initialized instance of type StringToUIMap |
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260 | static StringToUIMap& mapped_strings(); |
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261 | |
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262 | //! Immediately initialized instance of type TypeInfoToStringMap |
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263 | static TypeInfoToStringMap& mapped_type_infos(); |
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264 | |
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265 | //! Method for reporting a error when an attempt to operate with an unregistered class occures |
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266 | static void unregistered_class_error ( const string &unregistered_class_name ); |
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267 | |
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268 | public: |
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269 | //! Add a pair key-userinfo into the internal map |
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270 | static void add_class ( const string &class_name, const type_info * const class_type_info, const UI* const ui ); |
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271 | |
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272 | //! Search for an userinfo related to the passed class name within the internal map |
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273 | static const UI& retrieve_ui ( const string &class_name ); |
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274 | |
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275 | //! Search for an class name related to the passed type_info within the internal map |
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276 | static const string& retrieve_class_name ( const type_info* const class_type_info ); |
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277 | }; |
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278 | |
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279 | //! Function assertting that the setting element is of the SettingType type |
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280 | static void assert_type ( const Setting &element, Setting::Type type ); |
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281 | |
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282 | /*! |
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283 | \brief Method constructing a configured instance |
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284 | |
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285 | The returned pointer must be allocated using operator new |
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286 | (it's deleted at the end of its life cycle). The method is |
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287 | implemented in descendant class ParticularUI<T>, which knows |
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288 | the correct type T. |
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289 | */ |
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290 | virtual root* new_instance() const = 0; |
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291 | |
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292 | //! Method switching from the \a element to its child Setting according the passed \a index, it also does all the necessary error-checking |
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293 | static const Setting& to_child_setting ( const Setting &element, const int index ); |
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294 | |
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295 | //! Method switching from the \a element to its child Setting according the passed \a name, it also does all the necessary error-checking |
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296 | static const Setting& to_child_setting ( const Setting &element, const string &name ); |
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297 | |
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298 | //! A shortcut for calling instance.from_setting( set ); with some error catches added |
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299 | static void call_from_setting( root &instance, const Setting &set, string class_name = "unknown"); |
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300 | |
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301 | //! A shortcut for calling instance.to_setting( set ); with some error catches added |
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302 | static void call_to_setting( const root &instance, Setting &set, string class_name = "unknown" ); |
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303 | |
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304 | //! This method converts a Setting into a matrix |
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305 | static void from_setting ( mat& matrix, const Setting &element ); |
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306 | //! This method converts a Setting into a ldmat |
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307 | static void from_setting ( ldmat& matrix, const Setting &element ); |
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308 | //! This method converts a Setting into an integer vector |
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309 | static void from_setting ( ivec &vector, const Setting &element ); |
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310 | //! This method converts a Setting into a string |
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311 | static void from_setting ( string &str, const Setting &element ); |
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312 | //! This method converts a Setting into a real vector |
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313 | static void from_setting ( vec &vector, const Setting &element ); |
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314 | //! This method converts a Setting into a integer scalar |
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315 | static void from_setting ( int &integer, const Setting &element ); |
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316 | //! This method converts a Setting into a real scalar |
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317 | static void from_setting ( double &real, const Setting &element ); |
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318 | //! This method converts a Setting into a staticallly allocated root descendant |
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319 | static void from_setting ( root &instance, const Setting &element ); |
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320 | //! This method converts a Setting into a log_level |
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321 | //! |
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322 | //! Data is stored in string which has different meaning than usally. For that reason, a specialized |
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323 | //! method is necessary here to avoid the default call of "const SettingResolver link ( element );", |
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324 | //! which would lead to erroneous behaviour in this case |
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325 | static void from_setting ( log_level_base &log_level, const Setting &element ); |
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326 | //! This method converts a Setting into a dynamically allocated root descendant |
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327 | template<class T> static void from_setting ( T* &instance, const Setting &element ) { |
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328 | const SettingResolver link ( element ); |
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329 | assert_type( link.result, Setting::TypeGroup ); |
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330 | |
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331 | // we get a value stored in the "class" attribute |
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332 | string class_name; |
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333 | if ( !link.result.lookupValue ( "class", class_name ) ) |
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334 | throw UIClassException ( "UIException: the obligatory \"class\" identifier is missing.", link.result ); |
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335 | |
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336 | // then we find a user-info related to this type |
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337 | const UI& related_UI = MappedUI::retrieve_ui ( class_name ); |
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338 | |
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339 | root *typeless_instance = related_UI.new_instance(); |
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340 | bdm_assert ( typeless_instance, "UI::new_instance failed" ); |
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341 | |
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342 | instance = dynamic_cast<T*> ( typeless_instance ); |
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343 | if ( !instance ) { |
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344 | delete typeless_instance; |
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345 | throw UIClassException ( "UIException: class " + class_name + " is not a descendant of the desired output class. Try to call the UI::build<T> function with a different type parameter.", link.result ); |
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346 | } |
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347 | |
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348 | try { |
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349 | call_from_setting( *instance, link.result, class_name ); |
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350 | } catch ( ... ) { |
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351 | delete instance; |
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352 | instance = 0; |
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353 | throw; |
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354 | } |
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355 | } |
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356 | |
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357 | //! This method converts a Setting into a descendant of class |
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358 | //! T, wrapped in an instance of bdm::shared_ptr<T> . |
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359 | template<class T> static void from_setting ( bdm::shared_ptr<T> &instance, const Setting &element ) { |
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360 | T *tmp_inst = 0; |
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361 | from_setting ( tmp_inst, element ); |
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362 | bdm_assert ( tmp_inst, "UI::from_setting failed" ); |
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363 | instance = tmp_inst; |
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364 | } |
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365 | |
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366 | //! This methods converts a Setting into a new templated array of type Array<T> |
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367 | template<class T> static void from_setting ( Array<T> &array_to_load, const Setting &element ) { |
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368 | const SettingResolver link ( element ); |
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369 | |
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370 | assert_type ( link.result, Setting::TypeList ); |
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371 | |
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372 | int len = link.result.getLength(); |
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373 | array_to_load.set_length ( len ); |
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374 | if ( len == 0 ) return; |
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375 | |
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376 | for ( int i = 0; i < len; i++ ) |
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377 | from_setting ( array_to_load ( i ), link.result[i] ); |
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378 | } |
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379 | |
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380 | protected: |
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381 | //! Constructor for internal use only, see \sa ParticularUI<T> |
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382 | UI ( const string& class_name, const type_info * const class_type_info ) { |
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383 | MappedUI::add_class ( class_name, class_type_info, this ); |
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384 | } |
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385 | |
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386 | public: |
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387 | |
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388 | //! Enum type used to determine whether the data for concrete Settingis is compulsory or optional |
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389 | enum SettingPresence { optional, compulsory } ; |
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390 | |
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391 | //! \name Initialization of classes |
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392 | //!@{ |
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393 | //! The type T has to be a #bdm::root descendant class |
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394 | |
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395 | //! The new instance of type T* is constructed and initialized with values stored in the Setting element[name] |
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396 | //! |
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397 | //! If there does not exist any sub-element named name and settingPresence is optional, an empty bdm::shared_ptr<T> is returned. |
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398 | //! When settingPresence is compulsory, the returned bdm::shared_ptr<T> is never empty (an exception is thrown when the object isn't found). |
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399 | template<class T> |
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400 | static bdm::shared_ptr<T> build ( const Setting &element, const string &name, SettingPresence settingPresence = optional ) { |
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401 | if ( !element.exists ( name ) ) { |
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402 | if ( settingPresence == optional ) |
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403 | return bdm::shared_ptr<T>(); |
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404 | else |
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405 | throw UISettingException ( "UIException: the compulsory Setting named \"" + name + "\" is missing.", element ); |
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406 | } |
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407 | |
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408 | bdm::shared_ptr<T> instance; |
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409 | from_setting<T> ( instance, to_child_setting ( element, name ) ); |
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410 | return instance; |
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411 | } |
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412 | |
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413 | //! The new instance of type T* is constructed and initialized with values stored in the Setting element[index] |
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414 | //! |
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415 | //! If there does not exist any sub-element indexed by index, and settingPresence is optional, an empty bdm::shared_ptr<T> is returned. |
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416 | //! When settingPresence is compulsory, the returned bdm::shared_ptr<T> is never empty (an exception is thrown when the object isn't found). |
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417 | template<class T> |
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418 | static bdm::shared_ptr<T> build ( const Setting &element, const int index, SettingPresence settingPresence = optional ) { |
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419 | if ( element.getLength() <= index ) { |
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420 | if ( settingPresence == optional ) |
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421 | return bdm::shared_ptr<T>(); |
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422 | else { |
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423 | stringstream stream; |
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424 | stream << index; |
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425 | throw UISettingException ( "UIException: the compulsory Setting with the index " + stream.str() + " is missing.", element ); |
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426 | } |
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427 | } |
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428 | |
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429 | bdm::shared_ptr<T> instance; |
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430 | from_setting<T> ( instance, to_child_setting ( element, index ) ); |
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431 | return instance; |
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432 | } |
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433 | |
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434 | //! The new instance of type T* is constructed and initialized with values stored in the given Setting |
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435 | //! |
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436 | //! Handy in mex files. Use with care. |
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437 | template<class T> |
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438 | static bdm::shared_ptr<T> build ( const Setting &element, SettingPresence settingPresence = optional ) { |
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439 | bdm::shared_ptr<T> instance; |
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440 | from_setting<T> ( instance, element ); |
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441 | return instance; |
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442 | } |
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443 | |
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444 | //!@} |
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445 | |
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446 | //! \name Initialization of structures |
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447 | //!@{ |
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448 | //! The type T has to be int, double, string, vec, ivec or mat. |
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449 | |
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450 | //! The existing instance of type T is initialized with values stored in the Setting element[name] |
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451 | //! If there does not exist any sub-element named name, this method returns false. |
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452 | template<class T> static bool get ( T &instance, const Setting &element, const string &name, SettingPresence settingPresence = optional ) { |
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453 | if ( !element.exists ( name ) ) { |
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454 | if ( settingPresence == optional ) |
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455 | return false; |
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456 | else |
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457 | throw UISettingException ( "UIException: the compulsory Setting named \"" + name + "\" is missing.", element ); |
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458 | } |
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459 | |
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460 | from_setting ( instance, to_child_setting ( element, name ) ); |
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461 | return true; |
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462 | } |
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463 | |
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464 | //! The existing instance of type T is initialized with values stored in the Setting element[index] |
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465 | //! If there does not exist any sub-element indexed by index, this method returns false. |
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466 | template<class T> static bool get ( T &instance, const Setting &element, const int index, SettingPresence settingPresence = optional ) { |
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467 | if ( element.getLength() <= index ) { |
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468 | if ( settingPresence == optional ) |
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469 | return false; |
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470 | else { |
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471 | stringstream stream; |
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472 | stream << "UIException: the compulsory Setting with the index " << index << " is missing."; |
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473 | stream << index; |
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474 | throw UISettingException ( stream.str(), element ); |
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475 | } |
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476 | } |
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477 | |
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478 | from_setting ( instance, to_child_setting ( element, index ) ); |
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479 | return true; |
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480 | } |
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481 | |
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482 | //! The existing instance of type T is initialized with values stored in the Setting element directly |
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483 | template<class T> static bool get ( T &instance, const Setting &element ) { |
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484 | from_setting ( instance, element ); |
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485 | return true; |
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486 | } |
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487 | //!@} |
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488 | |
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489 | //! \name Initialization of arrays Array<T> |
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490 | //!@{ |
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491 | //! The type T has to be int, double, string, vec, ivec or mat, or pointer to any root descendant. |
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492 | |
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493 | //! The existing array of type T is initialized with values stored in the Setting element[name] |
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494 | //! If there is not any sub-element named name, this method returns false. |
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495 | template<class T> static bool get ( Array<T> &array_to_load, const Setting &element, const string &name, SettingPresence settingPresence = optional ) { |
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496 | if ( !element.exists ( name ) ) { |
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497 | if ( settingPresence == optional ) |
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498 | return false; |
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499 | else |
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500 | throw UISettingException ( "UIException: the compulsory Setting named \"" + name + "\" is missing.", element ); |
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501 | } |
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502 | |
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503 | from_setting ( array_to_load, to_child_setting ( element, name ) ); |
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504 | return true; |
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505 | } |
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506 | |
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507 | //! The existing array of type T is initialized with values stored in the Setting element[index] |
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508 | //! If there is not any sub-element indexed by index, this method returns false. |
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509 | template<class T> static bool get ( Array<T> &array_to_load, const Setting &element, const int index, SettingPresence settingPresence = optional ) { |
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510 | if ( element.getLength() <= index ) { |
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511 | if ( settingPresence == optional ) |
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512 | return bdm::shared_ptr<T>(); |
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513 | else { |
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514 | stringstream stream; |
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515 | stream << index; |
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516 | throw UISettingException ( "UIException: the compulsory Setting with the index " + stream.str() + " is missing.", element ); |
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517 | } |
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518 | } |
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519 | |
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520 | from_setting ( array_to_load, to_child_setting ( element, index ) ); |
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521 | return true; |
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522 | } |
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523 | |
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524 | //! The existing array of type T is initialized with values stored in the Setting element |
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525 | template<class T> static bool get ( Array<T> &array_to_load, const Setting &element ) { |
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526 | from_setting ( array_to_load, element ); |
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527 | return true; |
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528 | } |
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529 | //!@} |
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530 | |
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531 | //! \name Serialization of objects and structures into a new Setting |
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532 | //!@{ |
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533 | //! The new child Setting can be accessed either by its name - if some name is passed as a parameter - |
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534 | //! or by its integer index. In that case, the new element is added at the very end of the current list of child Settings. |
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535 | |
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536 | //! A root descendant is stored in the new child Setting appended to the passed element |
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537 | static void save ( const root &instance, Setting &element, const string &name = "" ); |
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538 | |
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539 | //! A pointer to root descendant is stored in the new child Setting appended to the passed element |
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540 | static void save ( const root * const instance, Setting &element, const string &name = "" ); |
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541 | |
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542 | //! A shared pointer to root descendant is stored in the new child Setting appended to the passed element |
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543 | template< class T> static void save ( const bdm::shared_ptr<T> &instance, Setting &element, const string &name = "" ) { |
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544 | save( instance.get(), element, name ); |
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545 | } |
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546 | |
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547 | //! An Array<T> instance is stored in the new child Setting appended to the passed element |
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548 | template<class T> static void save ( const Array<T> &array_to_save, Setting &element, const string &name = "" ) { |
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549 | assert_type ( element, Setting::TypeGroup ); |
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550 | Setting &list = ( name == "" ) ? element.add ( Setting::TypeList ) |
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551 | : element.add ( name, Setting::TypeList ); |
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552 | for ( int i = 0; i < array_to_save.length(); i++ ) |
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553 | save ( array_to_save ( i ), list ); |
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554 | } |
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555 | |
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556 | //! A matrix(of type mat) is stored in the new child Setting appended to the passed element |
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557 | static void save ( const mat &matrix, Setting &element, const string &name = "" ); |
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558 | |
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559 | //! A matrix(of type mat) is stored in the new child Setting appended to the passed element |
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560 | static void save ( const ldmat &matrix, Setting &element, const string &name = "" ); |
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561 | |
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562 | //! An integer vector (of type ivec) is stored in the new child Setting appended to the passed element |
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563 | static void save ( const ivec &vec, Setting &element, const string &name = "" ); |
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564 | |
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565 | //! A double vector (of type vec) is stored in the new child Setting appended to the passed element |
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566 | static void save ( const vec &vector, Setting &element, const string &name = "" ); |
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567 | |
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568 | //! A string is stored in the new child Setting appended to the passed element |
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569 | static void save ( const string &str, Setting &element, const string &name = "" ); |
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570 | |
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571 | //! An integer is stored in the new child Setting appended to the passed element |
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572 | static void save ( const int &integer, Setting &element, const string &name = "" ); |
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573 | |
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574 | //! A double is stored in the new child Setting appended to the passed element |
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575 | static void save ( const double &real, Setting &element, const string &name = "" ); |
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576 | |
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577 | // The only difference from classical UserInfo approach here is the fact |
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578 | // that the actual UI element related to log_level_base could possibly exists yet. In this case, |
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579 | // we do not want to throw an exception as usually. We rather append current data into the existig element. This way, it is |
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580 | // possible that more instances of log_level_base (templated with different classes) |
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581 | // can be stored in only one line in a configuration file |
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582 | static void save ( const log_level_base &log_level, Setting &element ); |
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583 | |
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584 | //!@} |
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585 | |
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586 | //! for future use |
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587 | virtual ~UI() {} |
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588 | }; |
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589 | |
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590 | |
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591 | //! The only UI descendant class which is not intended for direct use. It should be accessed within the UIREGISTER macro only. |
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592 | //! \ref ui |
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593 | template<typename T> class ParticularUI : private UI { |
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594 | public: |
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595 | //! Constructor used by the UIREGISTER macro. |
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596 | ParticularUI<T> ( const string &class_name ) : UI ( class_name, &typeid ( T ) ) {}; |
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597 | |
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598 | //! A method returning a brand new instance of class T, this method is the reason why there have to be a parameterless constructor in class T |
---|
599 | root* new_instance() const { |
---|
600 | return new T(); |
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601 | } |
---|
602 | }; |
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603 | |
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604 | } |
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605 | |
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606 | /*! |
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607 | \def UIREGISTER(class_name) |
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608 | \brief Macro for registration of class into map of user-infos, registered class is scriptable using UI static methods |
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609 | |
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610 | Argument \a class_name has to be a descendant of root class and also to have a default constructor. |
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611 | This macro should be used in header file, immediately after a class declaration. |
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612 | |
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613 | \ref ui |
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614 | */ |
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615 | #ifndef BDMLIB |
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616 | #define UIREGISTER(class_name) static bdm::ParticularUI<class_name> UI##class_name(#class_name) |
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617 | #else |
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618 | #define UIREGISTER(class_name) |
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619 | #endif |
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620 | |
---|
621 | //! Instrumental macro for UIREGISTER2 |
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622 | #define QUOTEME(x) #x |
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623 | |
---|
624 | /*! |
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625 | \def UIREGISTER2(class_name,template_name) |
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626 | \brief Variant of UIREGISTER for templated classes |
---|
627 | |
---|
628 | Technical meann of registering UIREGISTER(class_name<template_name>). |
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629 | |
---|
630 | \ref ui |
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631 | */ |
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632 | #ifndef BDMLIB |
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633 | #define UIREGISTER2(class_name, temp_name) static bdm::ParticularUI<class_name<temp_name> > UI##class_name##_##temp_name( QUOTEME(class_name<temp_name>) ) |
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634 | #else |
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635 | #define UIREGISTER2(class_name,temp_name) |
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636 | #endif |
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637 | |
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638 | #endif // #ifndef USER_INFO_H |
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