/**
* Returns a number of random albums, using ID3 tag.
*
* @param count Number of albums to return.
* @param musicFolders Only return albums from these folders.
* @return List of random albums.
*/
public List<Album> getRandomAlbumsId3(int count, List<MusicFolder> musicFolders) {
List<Album> result = new ArrayList<Album>();
IndexReader reader = null;
try {
reader = createIndexReader(ALBUM_ID3);
Searcher searcher = new IndexSearcher(reader);
List<SpanTermQuery> musicFolderQueries = new ArrayList<SpanTermQuery>();
for (MusicFolder musicFolder : musicFolders) {
musicFolderQueries.add(
new SpanTermQuery(
new Term(FIELD_FOLDER_ID, NumericUtils.intToPrefixCoded(musicFolder.getId()))));
}
Query query =
new SpanOrQuery(musicFolderQueries.toArray(new SpanQuery[musicFolderQueries.size()]));
TopDocs topDocs = searcher.search(query, null, Integer.MAX_VALUE);
List<ScoreDoc> scoreDocs = Lists.newArrayList(topDocs.scoreDocs);
Random random = new Random(System.currentTimeMillis());
while (!scoreDocs.isEmpty() && result.size() < count) {
int index = random.nextInt(scoreDocs.size());
Document doc = searcher.doc(scoreDocs.remove(index).doc);
int id = Integer.valueOf(doc.get(FIELD_ID));
try {
addIfNotNull(albumDao.getAlbum(id), result);
} catch (Exception x) {
LOG.warn("Failed to get album file " + id, x);
}
}
} catch (Throwable x) {
LOG.error("Failed to search for random albums.", x);
} finally {
FileUtil.closeQuietly(reader);
}
return result;
}
private File getAlbumImage(int id) {
Album album = albumDao.getAlbum(id);
return album == null || album.getCoverArtPath() == null
? null
: new File(album.getCoverArtPath());
}
public SearchResult search(
SearchCriteria criteria, List<MusicFolder> musicFolders, IndexType indexType) {
SearchResult result = new SearchResult();
int offset = criteria.getOffset();
int count = criteria.getCount();
result.setOffset(offset);
IndexReader reader = null;
try {
reader = createIndexReader(indexType);
Searcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new SubsonicAnalyzer();
MultiFieldQueryParser queryParser =
new MultiFieldQueryParser(
LUCENE_VERSION, indexType.getFields(), analyzer, indexType.getBoosts());
BooleanQuery query = new BooleanQuery();
query.add(queryParser.parse(analyzeQuery(criteria.getQuery())), BooleanClause.Occur.MUST);
List<SpanTermQuery> musicFolderQueries = new ArrayList<SpanTermQuery>();
for (MusicFolder musicFolder : musicFolders) {
if (indexType == ALBUM_ID3 || indexType == ARTIST_ID3) {
musicFolderQueries.add(
new SpanTermQuery(
new Term(FIELD_FOLDER_ID, NumericUtils.intToPrefixCoded(musicFolder.getId()))));
} else {
musicFolderQueries.add(
new SpanTermQuery(new Term(FIELD_FOLDER, musicFolder.getPath().getPath())));
}
}
query.add(
new SpanOrQuery(musicFolderQueries.toArray(new SpanQuery[musicFolderQueries.size()])),
BooleanClause.Occur.MUST);
TopDocs topDocs = searcher.search(query, null, offset + count);
result.setTotalHits(topDocs.totalHits);
int start = Math.min(offset, topDocs.totalHits);
int end = Math.min(start + count, topDocs.totalHits);
for (int i = start; i < end; i++) {
Document doc = searcher.doc(topDocs.scoreDocs[i].doc);
switch (indexType) {
case SONG:
case ARTIST:
case ALBUM:
MediaFile mediaFile = mediaFileService.getMediaFile(Integer.valueOf(doc.get(FIELD_ID)));
addIfNotNull(mediaFile, result.getMediaFiles());
break;
case ARTIST_ID3:
Artist artist = artistDao.getArtist(Integer.valueOf(doc.get(FIELD_ID)));
addIfNotNull(artist, result.getArtists());
break;
case ALBUM_ID3:
Album album = albumDao.getAlbum(Integer.valueOf(doc.get(FIELD_ID)));
addIfNotNull(album, result.getAlbums());
break;
default:
break;
}
}
} catch (Throwable x) {
LOG.error("Failed to execute Lucene search.", x);
} finally {
FileUtil.closeQuietly(reader);
}
return result;
}