///////////////////////////////////////////////////////////////////////
// Reads ZDAB files and provides ROOT objects
//
// Author: Andy Mastbaum
///////////////////////////////////////////////////////////////////////

#ifndef __ZDAB_FILE__
#define __ZDAB_FILE__

#include <RAT/zdab_convert.hh>

#include <exception>
#include <string>

#include <stdio.h>

class TObject;
class PZdabFile;
class nZDAB;

namespace ratzdab {

    /* A ZDAB file */
    class zdabfile {
        public:
            /* Load a ZDAB file.
             * Throws a ratzdab::zdabfile::file_read_error if an error
             * is encountered.
             */
            zdabfile(std::string filename);

            /* Close the ZDAB file */
            virtual ~zdabfile();

            /* Get the next record in the file as a ROOT object.
               Throws an unknown_record_error if an unknown record type
               is encountered. */
            TObject* next();

            /* Exception thrown if there are problems reading file */
            class zdab_file_read_error : public std::exception {
                virtual const char* what() const throw() {
                    return "Error occurred reading ZDAB file.";
                }
            } zfileex;

        protected:
            /* Convert a ZDAB record of any type */
            TObject* convert(nZDAB* const z);

            FILE* f;
            PZdabFile* p;
    };

}  // namespace ratzdab

#endif  // __ZDAB_FILE__