1 | |
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2 | /*! |
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3 | \file |
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4 | \brief Bayesian Models (bm) that use Bayes rule to learn from observations |
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5 | \author Vaclav Smidl. |
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6 | |
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7 | ----------------------------------- |
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8 | BDM++ - C++ library for Bayesian Decision Making under Uncertainty |
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9 | |
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10 | Using IT++ for numerical operations |
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11 | ----------------------------------- |
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12 | */ |
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13 | |
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14 | #ifndef root_H |
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15 | #define root_H |
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16 | |
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17 | #include <string> |
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18 | #include <bitset> |
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19 | |
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20 | #include "itpp_ext.h" |
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21 | #include "bdmerror.h" |
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22 | |
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23 | #ifdef MEX |
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24 | #include "base/libconfig/lib/libconfig.h++" |
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25 | // TODO DODELAT A NAHRADIT #include "base/libconfig_mex.h" |
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26 | #else |
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27 | #include "base/libconfig/lib/libconfig.h++" |
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28 | #endif |
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29 | |
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30 | |
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31 | using namespace libconfig; |
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32 | using namespace itpp; |
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33 | using namespace std; |
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34 | |
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35 | namespace bdm { |
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36 | |
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37 | //! auxiliary function for debugging |
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38 | void UI_DBG (const Setting &S, const string &spc, ostream &out ); |
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39 | |
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40 | //! This class stores a details that will be logged to a logger |
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41 | template<class T> class log_level_template { |
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42 | private: |
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43 | // UserInfo class have to be able to read all the internal |
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44 | // attributes to be able to write/read log_level to/from a Setting structure |
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45 | friend class UI; |
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46 | |
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47 | //! boolean flags related indicating which details will be logged to a logger |
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48 | bitset<32> values; |
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49 | |
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50 | //! string equivalents of the used enumerations which are filled with a help of #LOG_LEVEL macro within class T |
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51 | const Array<string> &names() const |
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52 | { |
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53 | return T::log_level_names(); |
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54 | } |
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55 | |
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56 | public: |
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57 | |
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58 | //! a general utility transforming a comma-separated sequence of strings into an instance of Array<strings> |
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59 | static Array<string> string2Array( const string &input ) |
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60 | { |
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61 | string result = input; |
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62 | string::size_type loc; |
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63 | while( loc = result.find( ',' ), loc != string::npos ) |
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64 | result[loc] = ' '; |
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65 | return Array<string>("{ " + result + " }" ); |
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66 | } |
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67 | |
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68 | //! is any field of log_level active? |
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69 | bool any() const |
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70 | { |
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71 | return values.any(); |
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72 | } |
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73 | |
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74 | //! read only operator for testing individual fields of log_level |
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75 | //! |
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76 | //! it is necessary to acces it with a proper enumeration type, thus this approach is type-safe |
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77 | bool operator [] (const enum T::log_level_enums &log_level ) const |
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78 | { |
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79 | return values[log_level]; |
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80 | } |
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81 | |
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82 | //! operator for setting an individual field of log_level |
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83 | //! |
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84 | //! it is necessary to acces it with a proper enumeration type, thus this approach is type-safe |
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85 | bitset<32>::reference operator [] (const enum T::log_level_enums &log_level ) |
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86 | { |
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87 | return values[log_level]; |
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88 | } |
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89 | }; |
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90 | |
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91 | /*! |
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92 | \def LOG_LEVEL(classname,...) |
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93 | \brief Macro for defining a log_level attribute with a specific set of enumerations related to a specific class |
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94 | |
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95 | This macro has to be called within a class declaration. Its argument \a classname has to correspond to that wrapping class. |
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96 | This macro defines a log_level instance which can be modified either directly or by the means of #UI class. |
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97 | |
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98 | One of the main purposes of this macro is to allow variability in using enumerations. By relating them to their names through |
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99 | an array of strings, we are no more dependant on their precise ordering. What is more, we can add or remove any without harming |
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100 | any applications which are using this library. |
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101 | |
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102 | \todo Write a more detailed explanation including also examples |
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103 | |
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104 | \ref ui |
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105 | */ |
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106 | #define LOG_LEVEL(classname,...) public: enum log_level_enums { __VA_ARGS__ }; log_level_template<classname> log_level; private: friend class log_level_template<classname>; static const Array<string> &log_level_names() { static const Array<string> log_level_names = log_level_template<classname>::string2Array( #__VA_ARGS__ ); return log_level_names; } |
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107 | |
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108 | //forward declaration |
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109 | class logger; |
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110 | |
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111 | //! information about connection to a logger |
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112 | class log_record { |
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113 | public: |
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114 | //!remember which logger is registered |
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115 | logger &L; |
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116 | //! vector of log IDs - one element for each entry |
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117 | ivec ids; |
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118 | |
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119 | //!default constructor |
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120 | log_record ( logger &L0 ) : L ( L0 ), ids ( 0 ) {} |
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121 | }; |
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122 | |
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123 | //! Root class of BDM objects |
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124 | class root { |
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125 | private: |
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126 | //! It is necessary to allow calling of from_setting and to_setting within the UI class ++ i log_options |
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127 | friend class UI; |
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128 | |
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129 | //! This method is a dummy method closely related to to the #LOG_LEVEL macro, do not remove it |
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130 | static const string &log_level_names() |
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131 | { |
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132 | static const string log_level_names; |
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133 | return log_level_names; |
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134 | }; |
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135 | |
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136 | protected: |
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137 | //! record of connections to the logger |
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138 | log_record* logrec; |
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139 | |
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140 | /*! |
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141 | \brief Read instance properties according the data stored in the Setting structure. |
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142 | It has to be called only through UI class, therefore it is protected |
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143 | |
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144 | At the begining of this method, it is obligatory to call |
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145 | the corresponding base::from_setting method. Sometimes, there can be |
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146 | an exception from this rule. If so, the programmer is encouraged |
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147 | to describe the reasons for this exception in the documentation in detail. |
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148 | |
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149 | Then, all the configuration components should be read through the UI mechanism. |
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150 | Those with UI::SettingPresence set to optional shoud have their defaults fulfilled |
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151 | within the body of this method. |
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152 | |
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153 | For instance, declaring a class \c trunk derived from our #root class, |
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154 | the implementation of the from_setting method should look like this |
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155 | |
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156 | \code |
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157 | |
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158 | public trunk : public root { |
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159 | |
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160 | anytype xxx, yyy; |
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161 | |
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162 | virtual void from_setting ( const Setting &set ) { |
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163 | root::from_setting( set ); |
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164 | |
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165 | UI::get ( xxx, set, "xxx", UI::compulsory ); |
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166 | |
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167 | if ( !UI::get ( yyy, set, "yyy", UI::optional ) ) { |
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168 | ... // here, it is necessary to set the default of attribute yyy |
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169 | } |
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170 | |
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171 | ... // another stuff related to trunk class |
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172 | } |
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173 | |
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174 | ... // other members of this class |
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175 | }; |
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176 | |
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177 | \endcode |
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178 | */ |
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179 | virtual void from_setting ( const Setting &set ) { |
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180 | } |
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181 | |
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182 | /*! |
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183 | \brief Save all the instance properties into the Setting structure. |
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184 | It has to be called only through UI class, therefore it is protected |
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185 | |
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186 | The only obligatory rule concerning the body of this method is to call |
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187 | the corresponding base::to_setting method first. Sometimes, there can |
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188 | be an exception from this rule. If so, the programmer is encouraged |
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189 | to describe the reasons for this exception in the documentation in detail. |
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190 | |
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191 | For instance, declaring |
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192 | a class \c trunk derived from our #root class, the implementation of |
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193 | the to_setting method should look like this |
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194 | |
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195 | \code |
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196 | public trunk : public root { |
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197 | |
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198 | anytype xxx; |
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199 | |
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200 | virtual void to_setting ( const Setting &set ) { |
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201 | root::to_setting( set ); |
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202 | |
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203 | UI::save ( xxx, set, "xxx" ); |
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204 | |
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205 | ... // another stuff related directly to trunk class |
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206 | |
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207 | } |
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208 | |
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209 | ... // other members of this class |
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210 | |
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211 | }; |
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212 | |
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213 | \endcode |
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214 | */ |
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215 | virtual void to_setting ( Setting &set ) const { |
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216 | } |
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217 | |
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218 | public: |
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219 | //! This enumeration defines all possible options specifing the level of details logged by a logger about this specific class |
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220 | //! |
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221 | //! It has to be reimplemented in descendant classes using the #LOG_LEVEL macro |
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222 | enum log_level_enums { }; |
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223 | |
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224 | //!default constructor |
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225 | root() : logrec ( NULL ) {}; |
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226 | |
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227 | //! make sure this is a virtual object |
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228 | virtual ~root() { |
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229 | if ( logrec ) delete logrec; |
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230 | } |
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231 | |
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232 | //! Returns basic textual info about the current instance |
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233 | virtual string to_string() const { |
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234 | Config C; |
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235 | Setting &set=C.getRoot(); |
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236 | this->to_setting(set); |
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237 | ostringstream os; |
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238 | UI_DBG(set, "", os); |
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239 | return os.str(); |
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240 | } |
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241 | //! Register itself in a logger, i.e. allocate space for data from this class |
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242 | //! The level of details (parameter \c level ) is individual for each class. |
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243 | virtual void log_register ( logger &L, const string &prefix ) { |
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244 | logrec = new log_record ( L ); |
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245 | } |
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246 | |
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247 | //! Write current information into the given logger |
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248 | virtual void log_write() const { |
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249 | } |
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250 | |
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251 | /*! |
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252 | \brief This method checks that all internal structures has been set up correctly. |
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253 | |
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254 | It is called automatically after the call of the #from_setting method by the mechanism of the UI class. |
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255 | However, it can be called in any other situation to assure the correctness of an instance. |
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256 | |
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257 | The only obligatory rule concerning the body of this method is to call |
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258 | the corresponding base::validate method first. Sometimes, there can be |
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259 | an exception from this rule. If so, the programmer is encouraged |
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260 | to describe the reasons for this exception in the documentation in detail. |
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261 | |
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262 | Then, only those checks which are not implemented in the base method |
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263 | are implemented here. For instance, declaring a class \c trunk derived from our |
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264 | #root class, the implementation of the method validate should |
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265 | look like this |
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266 | |
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267 | \code |
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268 | public trunk : public root { |
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269 | |
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270 | virtual void validate ( ) { |
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271 | root::validate( ); |
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272 | |
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273 | ... // checks related directly to trunk class |
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274 | } |
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275 | |
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276 | ... // other members of this class |
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277 | |
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278 | }; |
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279 | |
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280 | \endcode |
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281 | |
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282 | */ |
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283 | virtual void validate() { |
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284 | } |
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285 | |
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286 | //! Virtual method providing deep copy of instances |
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287 | virtual root* _copy() const NOT_IMPLEMENTED(NULL); |
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288 | |
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289 | }; |
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290 | |
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291 | }; //namespace |
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292 | #endif // root_H |
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