my_file_rec

let s:save_cpo  = &cpo                                                           
set cpo&vim

function! unite#sources#my_file_rec#define()
  return s:source
endfunction

let s:source = {
      \ 'name': 'my/file_rec',
      \ 'description': 'my files.'
      \ }

function! s:source.gather_candidates(args, context)

  return map(unite#get_candidates([['file_rec', '/path/to/my_file']]), "{
      \ 'word' v:val.word,
      \ 'action_path': v:val.action__path,
      \ 'kind': 'my/file' 
      \ }")

endfunction

let &cpo = s:save_cpo
unlet s:save_cpo