# File lib/bio/io/flatfile/index.rb, line 457
457:         def initialize(dbname, name)
458:           @dbname = dbname
459:           @name = name.dup
460:           @name.freeze
461:           @file = mapping(filename)
462:         end

     # File lib/bio/io/flatfile/index.rb, line 470
470:         def close
471:           @file.close
472:         end

     # File lib/bio/io/flatfile/index.rb, line 446
446:         def filename
447:           # should be redifined in child class
448:           raise NotImplementedError, "should be redefined in child class"
449:         end

     # File lib/bio/io/flatfile/index.rb, line 474
474:         def include?(key)
475:           r = search(key)
476:           unless r.empty? then
477:             key
478:           else
479:             nil
480:           end
481:         end

     # File lib/bio/io/flatfile/index.rb, line 451
451:         def mapping(filename)
452:           # should be redifined in child class
453:           raise NotImplementedError, "should be redefined in child class"
454:           #Flat_1::FlatMappingFile.new(filename)
455:         end

     # File lib/bio/io/flatfile/index.rb, line 465
465:         def search(key)
466:           @file.open
467:           @file.search(key)
468:         end