Пример #1
0
  /**
   * Returns a number of random songs.
   *
   * @param criteria Search criteria.
   * @return List of random songs.
   */
  public List<MediaFile> getRandomSongs(RandomSearchCriteria criteria) {
    List<MediaFile> result = new ArrayList<MediaFile>();

    IndexReader reader = null;
    try {
      reader = createIndexReader(SONG);
      Searcher searcher = new IndexSearcher(reader);

      BooleanQuery query = new BooleanQuery();
      query.add(
          new TermQuery(new Term(FIELD_MEDIA_TYPE, MediaFile.MediaType.MUSIC.name().toLowerCase())),
          BooleanClause.Occur.MUST);
      if (criteria.getGenre() != null) {
        String genre = normalizeGenre(criteria.getGenre());
        query.add(new TermQuery(new Term(FIELD_GENRE, genre)), BooleanClause.Occur.MUST);
      }
      if (criteria.getFromYear() != null || criteria.getToYear() != null) {
        NumericRangeQuery<Integer> rangeQuery =
            NumericRangeQuery.newIntRange(
                FIELD_YEAR, criteria.getFromYear(), criteria.getToYear(), true, true);
        query.add(rangeQuery, BooleanClause.Occur.MUST);
      }

      List<SpanTermQuery> musicFolderQueries = new ArrayList<SpanTermQuery>();
      for (MusicFolder musicFolder : criteria.getMusicFolders()) {
        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, Integer.MAX_VALUE);
      List<ScoreDoc> scoreDocs = Lists.newArrayList(topDocs.scoreDocs);
      Random random = new Random(System.currentTimeMillis());

      while (!scoreDocs.isEmpty() && result.size() < criteria.getCount()) {
        int index = random.nextInt(scoreDocs.size());
        Document doc = searcher.doc(scoreDocs.remove(index).doc);
        int id = Integer.valueOf(doc.get(FIELD_ID));
        try {
          addIfNotNull(mediaFileService.getMediaFile(id), result);
        } catch (Exception x) {
          LOG.warn("Failed to get media file " + id);
        }
      }

    } catch (Throwable x) {
      LOG.error("Failed to search or random songs.", x);
    } finally {
      FileUtil.closeQuietly(reader);
    }
    return result;
  }
Пример #2
0
  /**
   * Returns a number of random albums.
   *
   * @param count Number of albums to return.
   * @param musicFolders Only return albums from these folders.
   * @return List of random albums.
   */
  public List<MediaFile> getRandomAlbums(int count, List<MusicFolder> musicFolders) {
    List<MediaFile> result = new ArrayList<MediaFile>();

    IndexReader reader = null;
    try {
      reader = createIndexReader(ALBUM);
      Searcher searcher = new IndexSearcher(reader);

      List<SpanTermQuery> musicFolderQueries = new ArrayList<SpanTermQuery>();
      for (MusicFolder musicFolder : musicFolders) {
        musicFolderQueries.add(
            new SpanTermQuery(new Term(FIELD_FOLDER, musicFolder.getPath().getPath())));
      }
      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(mediaFileService.getMediaFile(id), result);
        } catch (Exception x) {
          LOG.warn("Failed to get media file " + id, x);
        }
      }

    } catch (Throwable x) {
      LOG.error("Failed to search for random albums.", x);
    } finally {
      FileUtil.closeQuietly(reader);
    }
    return result;
  }
Пример #3
0
  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;
  }