configset.hh
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00001 #ifndef UTILMM_CONFIG_SET_HH
00002 #define UTILMM_CONFIG_SET_HH
00003 
00004 #include <map>
00005 #include <string>
00006 #include <boost/noncopyable.hpp>
00007 #include <boost/lexical_cast.hpp>
00008 #include <boost/utility/enable_if.hpp>
00009 
00010 #include <list>
00011 
00012 namespace utilmm
00013 {
00014     /* To discriminate between list and non-list get<> */
00015     namespace details
00016     {
00017         template<typename T> struct is_list
00018         { static const bool value = false; };
00019         template<typename T> struct is_list< std::list<T> >
00020         { static const bool value = true; };
00021     }
00022 
00024     class config_set 
00025         : private boost::noncopyable
00026     {
00027         friend class ConfigFile;
00028 
00029     private:
00030         typedef std::list<std::string> stringlist;
00031         template<typename T>
00032         static T convert(std::string const& value);
00033         
00034     protected:
00035         config_set* m_parent;
00036         typedef std::multimap<std::string, std::string> ValueMap;
00037         ValueMap m_values;
00038         typedef std::multimap<std::string, const config_set*> ChildMap;
00039         ChildMap m_children;
00040 
00041     protected:
00043         void clear();
00044         
00045     public:
00046         explicit config_set(config_set* parent = 0);
00047         ~config_set();
00048         
00049         typedef std::list<const config_set*> subsets;
00050 
00052         bool empty() const;
00053 
00055         bool exists (const std::string& attribute) const;
00056         
00060         const config_set* parent() const;
00061         config_set* parent();
00062 
00064         std::list<const config_set*> children(const std::string& name) const;
00066         config_set const& child(std::string const& name) const;
00067 
00074         template<typename T> 
00075         T get(std::string const& name, T const& defval = T(),
00076                 typename boost::enable_if< details::is_list<T> >::type *enabler = 0) const;
00084         template<typename T> 
00085         T get(std::string const& name, T const& defval = T(),
00086                 typename boost::disable_if< details::is_list<T> >::type *enabler = 0) const;
00087 
00091         void set(std::string const& name, std::string const& value);
00096         void set(std::string const& name, std::list<std::string> const& value);
00098         void insert(std::string const& name, std::string const& value);
00100         void insert(std::string const& name, std::list<std::string> const& value);
00102         void insert(std::string const& name, config_set const* value);
00104         void erase(std::string const& name);
00105     };
00106 
00107     namespace details {
00108         typedef std::list<std::string> stringlist;
00109     }
00110 
00111     template<> bool config_set::convert(std::string const& value);
00112     template<typename T> 
00113     T config_set::convert(const std::string& value)
00114     { return boost::lexical_cast<T>(value); }
00115 
00116 
00117     template<>
00118     config_set::stringlist config_set::get(std::string const& name,
00119             config_set::stringlist const& defval,
00120             boost::enable_if< details::is_list<config_set::stringlist> >::type *enabler) const;
00121 
00122     template<typename T> 
00123     T config_set::get(std::string const& name, T const& defval,
00124             typename boost::enable_if< details::is_list<T> >::type *enabler) const
00125     {
00126         stringlist values = get< stringlist >(name);
00127         if (values.empty())
00128             return defval;
00129         
00130         T result;
00131         for (stringlist::const_iterator it = values.begin(); it != values.end(); ++it)
00132             result.push_back(convert<typename T::value_type>(*it));
00133 
00134         return result;
00135     }
00136 
00137     template<typename T>
00138     T config_set::get(std::string const& name, T const& defval,
00139             typename boost::disable_if< details::is_list<T> >::type *enabler) const
00140     {   
00141         std::list<T> deflist;
00142         deflist.push_back(defval);
00143         return get< std::list<T> >(name, deflist).front();
00144     }
00145 }
00146 
00147 #endif
00148 
00149 
00150 


utilmm
Author(s): Sylvain Joyeux/sylvain.joyeux@m4x.org
autogenerated on Mon Oct 6 2014 03:17:01