assertThat(limiter.getRate()).isEqualTo(5.0);
    limiter.setRate(10.0);
    assertThat(limiter.getRate()).isEqualTo(10.0);

    assertThrows(IllegalArgumentException.class, () -> limiter.setRate(0.0));
    assertThrows(IllegalArgumentException.class, () -> limiter.setRate(-10.0));
    assertThrows(IllegalArgumentException.class, () -> limiter.setRate(Double.NaN));
  }

    assertThat(limiter.getRate()).isEqualTo(5.0);
    limiter.setRate(10.0);
    assertThat(limiter.getRate()).isEqualTo(10.0);

    assertThrows(IllegalArgumentException.class, () -> limiter.setRate(0.0));
    assertThrows(IllegalArgumentException.class, () -> limiter.setRate(-10.0));
    assertThrows(IllegalArgumentException.class, () -> limiter.setRate(Double.NaN));
  }

   * passed in the factory method that produced this {@code RateLimiter}, and it is only updated
   * after invocations to {@linkplain #setRate}.
   */
  public final double getRate() {
    synchronized (mutex()) {
      return doGetRate();
    }
  }

  abstract double doGetRate();

  /**

   * passed in the factory method that produced this {@code RateLimiter}, and it is only updated
   * after invocations to {@linkplain #setRate}.
   */
  public final double getRate() {
    synchronized (mutex()) {
      return doGetRate();
    }
  }

  abstract double doGetRate();

  /**

     *
     */
    @Override
    public Object getData(final AccessResultData<?> accessResultData) {
        // check transformer name
        if (!getName().equals(accessResultData.getTransformerName())) {
            throw new CrawlerSystemException(
                    "Transformer is invalid. Use " + accessResultData.getTransformerName() + ". This transformer is " + getName() + ".");
        }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.codelibs.fess.crawler.transformer.Transformer#getData(org.codelibs.fess.crawler.entity
     * .AccessResultData)
     */
    @Override
    public Object getData(final AccessResultData<?> accessResultData) {
        // check transformer name
        if (!getName().equals(accessResultData.getTransformerName())) {
            throw new CrawlerSystemException(

        final PathInfo pi = convertToItem(id);
        if (StringUtil.isEmpty(pi.getPath()) && StringUtil.isEmpty(pi.getName())) {
            return StringUtil.EMPTY;
        }
        if (StringUtil.isEmpty(pi.getPath())) {
            return pi.getName();
        }
        return pi.getPath() + "/" + pi.getName();
    }

    public static PathInfo convertToItem(final String id) {

    /*
     * (non-Javadoc)
     *
     * @see
     * org.codelibs.fess.crawler.transformer.Transformer#getData(org.codelibs.fess.crawler.entity
     * .AccessResultData)
     */
    @Override
    public Object getData(final AccessResultData<?> accessResultData) {
        // check transformer name
        if (!getName().equals(accessResultData.getTransformerName())) {
            throw new CrawlerSystemException(

    }

    /**
     * @throws Exception
     */
    @Test
    public void testReadUTF8() throws Exception {
        assertThat(FileUtil.readUTF8(getPath("hoge_utf8.txt")), is("あ"));
    }

    private String getPath(final String fileName) {
        return getClass().getName().replace('.', '/').replaceFirst(getClass().getSimpleName(), fileName);
    }

                indent += "  ";
            }
        } else if (collectStepTrace != null) {
            if (collectStepTrace.getPath().get(0).getArtifact() == null) {
                return;
            }
            baseName = ArtifactIdUtils.toId(collectStepTrace.getPath().get(0).getArtifact())
                    .replace(":", "_");
            trackingFile = trackingDir.resolve(baseName + ext);