OptionalEntity<Date> dateOpt = OptionalUtil.ofNullable(new Date());

        assertTrue(stringOpt.isPresent());
        assertTrue(intOpt.isPresent());
        assertTrue(boolOpt.isPresent());
        assertTrue(dateOpt.isPresent());

        assertEquals("string", stringOpt.get());
        assertEquals(Integer.valueOf(42), intOpt.get());

        OptionalThing<Locale> result3 = provider.findBusinessLocale(null, mockRequestManager);

        // Verify all return same result
        assertTrue(result1.isPresent());
        assertTrue(result2.isPresent());
        assertTrue(result3.isPresent());
        assertEquals(Locale.GERMANY, result1.get());
        assertEquals(Locale.GERMANY, result2.get());
        assertEquals(Locale.GERMANY, result3.get());
    }

        assertFalse(result.isPresent());
    }

    // Test get method with valid data
    public void test_get_validData() throws Exception {
        writeTestFile("a,b => c\nd,e => f\n");

        OptionalEntity<CharMappingItem> result1 = charMappingFile.get(1L);
        assertTrue(result1.isPresent());
        CharMappingItem item1 = result1.get();

                + "</globalparams></config></eef>";

        parser.parse(new InputSource(new StringReader(minimalXml)));

        assertTrue(parser.getWebConfig().isPresent());
        assertFalse(parser.getFileConfig().isPresent());
        assertEquals(0, parser.getLabelTypes().length);
    }

    public void test_parseWithFileUrls() {
        GsaConfigParser parser = new GsaConfigParser();

        assertTrue(result.isPresent());
        assertEquals("the", result.get().getInput());
    }

    public void test_get_nonExistingItem() {
        // Load test data
        loadTestData();

        OptionalEntity<StopwordsItem> result = stopwordsFile.get(999);
        assertFalse(result.isPresent());
    }

    public void test_get_withNullList() {

        return !((java.util.Optional<?>) value).isPresent();
      } else if (value instanceof OptionalInt) {
        return !((OptionalInt) value).isPresent();
      } else if (value instanceof OptionalLong) {
        return !((OptionalLong) value).isPresent();
      } else if (value instanceof OptionalDouble) {
        return !((OptionalDouble) value).isPresent();
      } else if (value instanceof Optional) {

        OptionalEntity<ProtwordsItem> item = protwordsFile.get(999);
        assertFalse(item.isPresent());
    }

    public void test_get_withUnloadedData() {
        // Test getting item when data is not loaded yet
        OptionalEntity<ProtwordsItem> item = protwordsFile.get(1);
        assertTrue(item.isPresent());
        assertEquals("test1", item.get().getInput());
    }

   *
   * @throws IOException if an I/O error occurs
   * @since 15.0
   */
  public boolean isEmpty() throws IOException {
    Optional<Long> sizeIfKnown = sizeIfKnown();
    if (sizeIfKnown.isPresent()) {
      return sizeIfKnown.get() == 0L;
    }
    Closer closer = Closer.create();
    try {
      InputStream in = closer.register(openStream());
      return in.read() == -1;
    } catch (Throwable e) {

   * otherwise returns an empty stream.
   */
  public static <T> Stream<T> stream(com.google.common.base.Optional<T> optional) {
    return optional.isPresent() ? Stream.of(optional.get()) : Stream.empty();
  }

  /**
   * If a value is present in {@code optional}, returns a stream containing only that element,
   * otherwise returns an empty stream.
   *

   * @since 19.0
   */
  public long length() throws IOException {
    Optional<Long> lengthIfKnown = lengthIfKnown();
    if (lengthIfKnown.isPresent()) {
      return lengthIfKnown.get();
    }

    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      return countBySkipping(reader);