public static Io_stream_rdr Get_rdr_or_null(
Io_url src_fil, Io_url src_dir, Io_stream_unzip_mgr unzip_mgr, String... filter_ary) {
IoItmFil src_itm = null;
if (src_fil != null) src_itm = Io_mgr.I.QueryFil(src_fil);
// specified file doesn't exist; try to find similar file based on filter
if (src_itm == null || !src_itm.Exists()) {
src_itm = Get_itm_by_filters(src_dir, filter_ary);
if (src_itm == null) return null;
}
// return rdr
Io_url src_itm_url = src_itm.Url();
Io_stream_rdr rv =
unzip_mgr.Handles(src_itm_url)
? unzip_mgr.New_rdr(src_itm_url)
: Io_stream_rdr_.file_(src_itm_url);
rv.Len_(src_itm.Size());
return rv;
}
public Io_stream_rdr New_rdr(Io_url url) {
return stdout_enabled
? Io_stream_rdr_process.new_(
stdout_process.Exe_url(), url, stdout_process.Xto_process_bldr_args(url.Raw()))
: Io_stream_rdr_.bzip2_(url);
}