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pass all tags trough a filter

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This commit is contained in:
Adrian Ulrich 2016-11-27 14:16:16 +01:00
parent d2559dcaf0
commit d493056cc9
1 changed files with 44 additions and 11 deletions
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55
src/ch/blinkenlights/android/medialibrary/MediaMetadataExtractor.java
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@ -44,7 +44,15 @@ public class MediaMetadataExtractor extends HashMap<String, ArrayList<String>> {
/**
* Regexp used to match a year in a date field
*/
private static final Pattern sExtractYear = Pattern.compile("(\\d{4})");
private static final Pattern sFilterYear = Pattern.compile("(\\d{4})");
/**
* Regexp matching the first lefthand integer
*/
private static final Pattern sFilterLeftInt = Pattern.compile("^0*(\\d+)");
/**
* Regexp matching anything
*/
private static final Pattern sFilterAny = Pattern.compile("^(.*)$");
/**
* Constructor for MediaMetadataExtractor
@ -132,23 +140,24 @@ public class MediaMetadataExtractor extends HashMap<String, ArrayList<String>> {
String[] map = new String[]{ "TITLE", TITLE, "ARTIST", ARTIST, "ALBUM", ALBUM, "ALBUMARTIST", ALBUMARTIST, "COMPOSER", COMPOSER, "GENRE", GENRE,
"TRACKNUMBER", TRACK_NUMBER, "TRACKTOTAL", TRACK_COUNT, "DISCNUMBER", DISC_NUMBER, "DISCTOTAL", DISC_COUNT,
"YEAR", YEAR };
// switch to integer filter if i >= x
int filterByIntAt = 12;
// the filter we are normally using
Pattern filter = sFilterAny;
for (int i=0; i<map.length; i+=2) {
if (i >= filterByIntAt)
filter = sFilterLeftInt;
if (bastp.containsKey(map[i])) {
ArrayList<String> tags = (ArrayList<String>)bastp.get(map[i]);
put(map[i+1], tags);
addFiltered(filter, map[i+1], (ArrayList<String>)bastp.get(map[i]));
}
}
// Try to guess YEAR from date field if only DATE was specified
// We expect it to match \d{4}
if (containsKey(YEAR) == false && bastp.containsKey("DATE")) {
ArrayList<String> dateList = (ArrayList<String>)bastp.get("DATE");
Matcher dateMatch = sExtractYear.matcher(dateList.get(0));
if (dateMatch.matches()) {
ArrayList<String> year = new ArrayList<String>(1);
year.add(dateMatch.group(1));
this.put(YEAR, year);
}
addFiltered(sFilterYear, YEAR, (ArrayList<String>)bastp.get("DATE"));
}
}
@ -163,15 +172,39 @@ public class MediaMetadataExtractor extends HashMap<String, ArrayList<String>> {
MediaMetadataRetriever.METADATA_KEY_ALBUMARTIST, MediaMetadataRetriever.METADATA_KEY_COMPOSER, MediaMetadataRetriever.METADATA_KEY_GENRE,
MediaMetadataRetriever.METADATA_KEY_CD_TRACK_NUMBER, MediaMetadataRetriever.METADATA_KEY_YEAR };
String[] selfMap = new String[]{ TITLE, ARTIST, ALBUM, ALBUMARTIST, COMPOSER, GENRE, TRACK_NUMBER, YEAR };
int filterByIntAt = 6;
Pattern filter = sFilterAny;
for (int i=0; i<selfMap.length; i++) {
String data = tags.extractMetadata(mediaMap[i]);
if (i >= filterByIntAt)
filter = sFilterLeftInt;
if (data != null) {
ArrayList<String> md = new ArrayList<String>(1);
md.add(data);
put(selfMap[i], md);
addFiltered(filter, selfMap[i], md);
}
}
}
/**
* Matches all elements of `data' with `filter' and adds the result as `key'
*
* @param filter the pattern to use, result is expected to be in capture group 1
* @param key the key to use for the data to put
* @param data the array list to inspect
*/
private void addFiltered(Pattern filter, String key, ArrayList<String> data) {
ArrayList<String> list = new ArrayList<String>();
for (String s : data) {
Matcher matcher = filter.matcher(s);
if (matcher.matches()) {
list.add(matcher.group(1));
}
}
if (list.size() > 0)
put(key, list);
}
}