Long transferred;
        synchronized (transfers) {
            transferred = transfers.remove(transferEvent.getResource());
        }
        if (transferred != null) {
            event.setTransferredBytes(transferred);
        }

        synchronized (artifacts) {
            artifacts.remove(transferEvent.getResource());
        }

        listener.transferCompleted(event);
    }

  }

  public void testToString() throws IOException {
    URL resource = getClass().getResource("testdata/i18n.txt");
    assertEquals(I18N, Resources.toString(resource, UTF_8));
    assertThat(Resources.toString(resource, US_ASCII)).isNotEqualTo(I18N);
  }

  public void testToByteArray() throws IOException {
    URL resource = getClass().getResource("testdata/i18n.txt");

  }

  public void testToString() throws IOException {
    URL resource = getClass().getResource("testdata/i18n.txt");
    assertEquals(I18N, Resources.toString(resource, UTF_8));
    assertThat(Resources.toString(resource, US_ASCII)).isNotEqualTo(I18N);
  }

  public void testToByteArray() throws IOException {
    URL resource = getClass().getResource("testdata/i18n.txt");

                        return new FileModelSource(new File(getClass()
                                .getResource("/poms/depmgmt/import.xml")
                                .getFile()));
                    case "test:other:pom":
                        return new FileModelSource(new File(getClass()
                                .getResource("/poms/depmgmt/other-import.xml")
                                .getFile()));

     */
    @Test
    public void testForEachJarFile() throws Exception {
        final String classFilePath = TestCase.class.getName().replace('.', '/') + ".class";
        final URL classURL = ResourceUtil.getResource(classFilePath);
        final JarURLConnection con = (JarURLConnection) classURL.openConnection();
        ResourceTraversalUtil.forEach(con.getJarFile(), (ResourceHandler) (path, is) -> {
            try {

        println(
                "transferInitiated",
                message + ": " + event.getResource().getRepositoryUrl()
                        + event.getResource().getResourceName());
    }

    @Override
    public void transferProgressed(TransferEvent event) {
        TransferResource resource = event.getResource();
        downloads.put(resource, event.getTransferredBytes());

  // e.g. Optional<URL> tryGetResource or boolean resourceExists
  public static URL getResource(String resourceName) {
    ClassLoader loader =
        MoreObjects.firstNonNull(
            Thread.currentThread().getContextClassLoader(), Resources.class.getClassLoader());
    URL url = loader.getResource(resourceName);
    checkArgument(url != null, "resource %s not found.", resourceName);
    return url;
  }

        ongoing.putIfAbsent(new TransferResourceIdentifier(event.getResource()), Boolean.TRUE);
        put(event, false);
    }

    @Override
    public void transferStarted(TransferEvent event) throws TransferCancelledException {
        if (ongoing.get(new TransferResourceIdentifier(event.getResource())) == Boolean.FALSE) {
            throw new TransferCancelledException();
        }

    }

    /**
     * @throws Exception
     */
    public void testGetResource() throws Exception {
        assertNotNull(ResourceUtil.getResource("java/lang/String.class", "class"));
        assertNotNull(ResourceUtil.getResource("org/codelibs"));
        try {
            ResourceUtil.getResource("hoge", "xml");
            fail("2");
        } catch (final ResourceNotFoundRuntimeException e) {
            System.out.println(e);

     *
     * @param path
     *            リソースのパス。{@literal null}や空文字列であってはいけません
     * @return リソースの{@link URL}
     * @see #getResource(String, String)
     */
    public static URL getResource(final String path) {
        assertArgumentNotEmpty("path", path);

        return getResource(path, null);
    }

    /**
     * コンテキストクラスローダからリソースを返します。
     *
     * @param path