code: public InputSource resolveEntity(String publicId, String systemId) throws
        SAXException, IOException {
      if (systemId == null) {
        return null;
      }
  
      URL url = new URL(systemId);
      String file = url.getFile();
  
      if ( (file != null) && (file.indexOf('/') > -1)) {
        file = file.substring(file.lastIndexOf('/') + 1);
      }
  
      if ("www.jdon.com".equals(url.getHost())) {
        InputStream is = getClass().getResourceAsStream("/META-INF/" + file);
  
        if (is == null) {
          is = getClass().getResourceAsStream("/" + file);
        }
  
        if (is != null) {
          return new InputSource(is);
        }
      }
  
      return null;
    }
docs: ~ Methods ////////////////////////////////////////////////////////////////