protected String extractDDMContent(DLFileVersion dlFileVersion, Locale locale) throws Exception {

    List<DLFileEntryMetadata> dlFileEntryMetadatas =
        DLFileEntryMetadataLocalServiceUtil.getFileVersionFileEntryMetadatas(
            dlFileVersion.getFileVersionId());

    StringBundler sb = new StringBundler(dlFileEntryMetadatas.size());

    for (DLFileEntryMetadata dlFileEntryMetadata : dlFileEntryMetadatas) {
      Fields fields = null;

      try {
        fields = StorageEngineUtil.getFields(dlFileEntryMetadata.getDDMStorageId());
      } catch (Exception e) {
      }

      if (fields != null) {
        DDMStructure ddmStructure =
            DDMStructureLocalServiceUtil.getStructure(dlFileEntryMetadata.getDDMStructureId());

        sb.append(DDMIndexerUtil.extractAttributes(ddmStructure, fields, locale));
      }
    }

    return sb.toString();
  }
  protected void addFileEntryTypeAttributes(Document document, DLFileVersion dlFileVersion)
      throws PortalException {

    List<DLFileEntryMetadata> dlFileEntryMetadatas =
        DLFileEntryMetadataLocalServiceUtil.getFileVersionFileEntryMetadatas(
            dlFileVersion.getFileVersionId());

    for (DLFileEntryMetadata dlFileEntryMetadata : dlFileEntryMetadatas) {
      Fields fields = null;

      try {
        fields = StorageEngineUtil.getFields(dlFileEntryMetadata.getDDMStorageId());
      } catch (Exception e) {
      }

      if (fields != null) {
        DDMStructure ddmStructure =
            DDMStructureLocalServiceUtil.getStructure(dlFileEntryMetadata.getDDMStructureId());

        DDMIndexerUtil.addAttributes(document, ddmStructure, fields);
      }
    }
  }