source/directorycollection.h

   1 #ifndef MSP_DATAFILE_DIRECTORYCOLLECTION_H_
   2 #define MSP_DATAFILE_DIRECTORYCOLLECTION_H_
   3
   4 #include <msp/fs/path.h>
   5 #include "collection.h"
   6
   7 namespace Msp {
   8 namespace DataFile {
   9
  10 /**
  11 A Collection that can automatically load items from files in a directory.
  12 */
  13 class DirectoryCollection: public Collection
  14 {
  15 private:
  16         std::list<FS::Path> dirs;
  17
  18 public:
  19         DirectoryCollection();
  20
  21 protected:
  22         void set_directory(const FS::Path &);
  23         void add_directory(const FS::Path &);
  24
  25         template<typename T>
  26         CollectionItemType<T> &add_type()
  27         {
  28                 return Collection::add_type<T>().creator(&DirectoryCollection::create<T>);
  29         }
  30
  31 private:
  32         template<typename T>
  33         T *create(const std::string &name)
  34         {
  35                 FS::Path file;
  36                 if(lookup_file(name, file))
  37                 {
  38                         RefPtr<T> item = new T;
  39                         load(*item, file.str());
  40                         return item.release();
  41                 }
  42                 else
  43                         return 0;
  44         }
  45
  46 protected:
  47         bool lookup_file(const std::string &, FS::Path &) const;
  48 };
  49
  50 } // namespace DataFile
  51 } // namespace Msp
  52
  53 #endif