* @return the embedded file, or null if not found
     */
    protected PDEmbeddedFile getEmbeddedFile(final PDComplexFileSpecification fileSpec) {
        // search for the first available alternative of the embedded file
        PDEmbeddedFile embeddedFile = null;
        if (fileSpec != null) {
            embeddedFile = fileSpec.getEmbeddedFileUnicode();
            if (embeddedFile == null) {

        try {
            final StandardQueryParser parser = new StandardQueryParser();
            parser.setDefaultOperator(StandardQueryConfigHandler.Operator.AND);

            // Parse with the first field if available, otherwise use "default"
            String defaultField = fields != null && fields.length > 0 ? fields[0] : "default";
            termQueryList = getTermQueryList(parser.parse(q, defaultField), fields);

        final MimeTypeHelper mimeTypeHelper = crawlerContainer.getComponent("mimeTypeHelper");
        if (mimeTypeHelper == null) {
            throw new CrawlerSystemException("MimeTypeHelper is unavailable.");
        }
        return mimeTypeHelper;
    }

    /**
     * Returns the ExtractorFactory instance from the CrawlerContainer.
     * @return The ExtractorFactory instance.
     */

        <match value="facet " offset="7:256" type="string"/>
      </match>
    </magic>
  </mime-type>
  <mime-type type="model/x.stl-binary">
    <_comment>no magic available</_comment>
    <glob pattern="*.stl"/>
  </mime-type>
  <mime-type type="model/vnd.dwf">
    <acronym>DWF</acronym>
    <_comment>AutoCAD Design Web Format</_comment>
    <alias type="drawing/x-dwf"/>

     */
    protected FTPClient getClient(final FtpInfo info) throws IOException {
        FTPClient ftpClient = ftpClientQueue.poll();
        if (ftpClient != null) {
            if (ftpClient.isAvailable()) {
                return ftpClient;
            }
            try {
                ftpClient.disconnect();
            } catch (final Exception e) {