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;
}
private static IoItmFil Get_itm_by_filters(Io_url dir, String... filter_ary) {
// create array of matches based on filters
int match_ary_len = filter_ary.length;
Criteria_ioMatch[] match_ary = new Criteria_ioMatch[match_ary_len];
for (int i = 0; i < match_ary_len; ++i)
match_ary[i] = Criteria_ioMatch.parse_(true, filter_ary[i], dir.Info().CaseSensitive());
// get files and check each file for match
IoItmFil rv = null;
IoItmHash itm_hash = Io_mgr.I.QueryDir_args(dir).ExecAsItmHash();
int len = itm_hash.Count();
for (int i = 0; i < len; ++i) {
IoItm_base itm = itm_hash.Get_at(i);
for (int j = 0; j < match_ary_len; ++j) {
if (itm.Type_fil() && match_ary[j].Matches(itm.Url()))
rv =
(IoItmFil)
itm; // NOTE: this will return the last match; useful for getting latest dump when
// multiple dumps are in one dir; (assuming latest should alphabetize last)
}
}
return rv;
}