filefilterframewithheader.hpp

一个gps小工具包

         /// Returns the contents of the header data list, const.
      std::list<FileHeader> getHeaderData(void) const {return headerList;}

         /// Returns the number of data items in the header list.
      typename std::list<FileHeader>::size_type getHeaderCount(void) const 
         { return headerList.size(); }

      typename std::list<FileHeader>::const_iterator beginHeader() const
         throw(gpstk::InvalidRequest);

      typename std::list<FileHeader>::const_iterator endHeader() const
         throw(gpstk::InvalidRequest);

      typename std::list<FileHeader>::iterator beginHeader() 
         throw(gpstk::InvalidRequest);

      typename std::list<FileHeader>::iterator endHeader() 
         throw(gpstk::InvalidRequest);

      bool emptyHeader() const
         { return headerList.empty(); }

      typename std::list<FileHeader>::size_type sizeHeader()
         { return headerList.size(); }

      FileHeader& frontHeader()
         throw(gpstk::InvalidRequest);

      const FileHeader& frontHeader() const
         throw(gpstk::InvalidRequest);

      FileHeader& backHeader()
         throw(gpstk::InvalidRequest);

      const FileHeader& backHeader() const
         throw(gpstk::InvalidRequest);

   protected:
         ///  Run init() to load the data into the filter.  
      void init(const std::vector<FileHunter::FilterPair>& filter= 
                std::vector<FileHunter::FilterPair>()) 
         throw(gpstk::Exception);

         /// Check to make sure headerList is empty
         /// @throw InvalidRequest if headerList is empty
      inline void chl(const std::string& req) throw(gpstk::InvalidRequest)
      {
         gpstk::InvalidRequest exc("Header list is empty attempting to"
                                    " satisfy "+req+" request.");
         if (headerList.empty())
         {
            GPSTK_THROW(exc);
         }
      }

   protected:   
      std::list<FileHeader> headerList;
   };

   //@}

   template <class FileStream, class FileData, class FileHeader>
   bool FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::
   writeFile(const std::string& outputFile,
             const FileHeader& fh) const
      throw(gpstk::Exception)
   {
         // make the directory (if needed)
      std::string::size_type pos = outputFile.rfind('/');
      if (pos != std::string::npos)
         gpstk::FileUtils::makeDir(outputFile.substr(0,pos).c_str(), 0755);
      
      FileStream stream(outputFile.c_str(), std::ios::out|std::ios::trunc);
      stream.exceptions(std::ios::failbit);

      stream << fh;

      typename std::list<FileData>::const_iterator index;
      for(index = this->dataVec.begin(); index != this->dataVec.end(); index++)
         stream << (*index);
      return true;
   }

    template <class FileStream, class FileData, class FileHeader>
   typename std::list<FileHeader>::const_iterator
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::beginHeader()
      const throw(gpstk::InvalidRequest)
   {
      try { chl("beginHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.begin();
   }

   template <class FileStream, class FileData, class FileHeader>
   typename std::list<FileHeader>::const_iterator
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::endHeader()
      const throw(gpstk::InvalidRequest)
   {
      try { chl("endHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.end();
   }

   template <class FileStream, class FileData, class FileHeader>
   typename std::list<FileHeader>::iterator
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::beginHeader()
      throw(gpstk::InvalidRequest)
   {
      try { chl("beginHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.begin();
   }


   template <class FileStream, class FileData, class FileHeader>
   typename std::list<FileHeader>::iterator
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::endHeader()
      throw(gpstk::InvalidRequest)
   {
      try { chl("endHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.end();
   }

   template <class FileStream, class FileData, class FileHeader>
   FileHeader&
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::frontHeader()
      throw(gpstk::InvalidRequest)
   {
      try { chl("frontHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.front();
   }


   template <class FileStream, class FileData, class FileHeader>
   const FileHeader&
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::frontHeader()
      const throw(gpstk::InvalidRequest)
   {
      try { chl("frontHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.front();
   }


   template <class FileStream, class FileData, class FileHeader>
   FileHeader&
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::backHeader()
      throw(gpstk::InvalidRequest)
   {
      try { chl("backHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.back();
   }


   template <class FileStream, class FileData, class FileHeader>
   const FileHeader&
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader>::backHeader()
      const throw(gpstk::InvalidRequest)
   {
      try { chl("backHeader"); }
      catch(gpstk::InvalidRequest exc)
      { GPSTK_RETHROW(exc); }
      return headerList.back();
   }

   template <class FileStream, class FileData, class FileHeader>
   void
   FileFilterFrameWithHeader<FileStream,FileData,FileHeader> :: 
   init(const std::vector<FileHunter::FilterPair>& filter)
      throw(gpstk::Exception)
   {
         // find the files
      FileHunter fh(this->fs);
   
      typename std::vector<FileHunter::FilterPair>::const_iterator itr = 
         filter.begin();
      while (itr != filter.end())
      {
         fh.setFilter((*itr).first, (*itr).second);
         itr++;
      }

      std::vector<std::string> listOfFiles = 
         fh.find(this->startTime, this->endTime, FileSpec::ascending);

         // for each file, just read the header
      typename std::vector<std::string>::iterator i;
      for(i = listOfFiles.begin(); i != listOfFiles.end(); i++)
      {
         FileStream s((*i).c_str());

         if (s.good())
         {
            s.exceptions(std::ios::failbit);

            FileHeader header;
            s >> header;
            headerList.push_back(header);
         }
      }
   }  

} // namespace gpstk

#endif //GPSTK_FILEFILTERFRAMEWITHHEADER_HPP