Example usage for java.util Optional of

Introduction

In this page you can find the example usage for java.util Optional of.

Prototype

public static <T> Optional<T> of(T value)

Source Link

Document

Returns an Optional describing the given non- null value.

Usage

From source file:org.jhk.pulsing.web.dao.prod.db.redis.RedisPulseDao.java

@Override
public Optional<Pulse> getPulse(PulseId pulseId) {
    _LOGGER.debug("RedisPulseDao.getPulse: " + pulseId);

    String pulseJson = getJedis().get(PULSE_.toString() + pulseId.getId());
    Optional<Pulse> pulse = Optional.empty();

    if (pulseJson != null) {
        try {// w ww  . ja va 2  s .com
            pulse = Optional.of(SerializationHelper.deserializeFromJSONStringToAvro(Pulse.class,
                    Pulse.getClassSchema(), pulseJson));
        } catch (IOException dException) {
            dException.printStackTrace();
        }
    }

    return pulse;
}

From source file:se.omegapoint.facepalm.infrastructure.FilePolicyRepository.java

@Override
public Optional<Policy> retrievePolicyWith(final String filename) {
    notBlank(filename);//w ww .  j  a  va 2s.c  om

    final ExecutorService executorService = Executors.newSingleThreadExecutor();
    final Command command = commandBasedOnOperatingSystem(filename);
    final Future<String> future = executorService.submit(command);

    try {
        eventService.publish(new GenericEvent(format("About to execute command[%s]", command.command)));
        return Optional.of(new Policy(future.get(TIMEOUT, TimeUnit.SECONDS)));
    } catch (Exception e) {
        return Optional.empty();
    }
}

From source file:net.cyphoria.cylus.web.controller.KontoBearbeitenControllerTest.java

@Test
public void kontoModellObjektWirdberKontoNummerGeladen() throws ResourceNotFoundException {
    when(kontoService.findeKontoMitKontoNummer(KONTO_NUMMER)).thenReturn(Optional.of(KONTO));

    assertThat(controller.getKonto(KONTO_NUMMER), is(KONTO));
}

From source file:net.sf.jabref.logic.util.io.FileUtil.java

/**
 * Returns the extension of a file name or Optional.empty() if the file does not have one (no . in name).
 *
 * @param fileName//from w w w . j  av  a 2 s. c  o m
 * @return The extension, trimmed and in lowercase.
 */
public static Optional<String> getFileExtension(String fileName) {
    int pos = fileName.lastIndexOf('.');
    if ((pos > 0) && (pos < (fileName.length() - 1))) {
        return Optional.of(fileName.substring(pos + 1).trim().toLowerCase());
    } else {
        return Optional.empty();
    }
}

From source file:org.ulyssis.ipp.config.Config.java

/**
 * Create a configuration from the given JSON configuration string.
 *///from   www.  jav  a 2s.  co m
public static Optional<Config> fromConfigurationString(String configuration) {
    ObjectMapper mapper = new ObjectMapper();
    mapper.findAndRegisterModules();
    try {
        Config result = mapper.readValue(configuration, Config.class);
        return Optional.of(result);
    } catch (IOException e) {
        LOG.error("Error reading configuration", e);
        return Optional.empty();
    }
}

From source file:com.example.config.WithAccessTokenSecurityContextFactory.java

@Override
public SecurityContext createSecurityContext(final WithAccessToken annotation) {
    final SecurityContext context = SecurityContextHolder.createEmptyContext();
    final GivenAccessToken accessToken = new GivenAccessToken(annotation);
    final OAuth2Authentication oauth2 = accessToken.oauth2();

    final MockingDetails mockingDetails = Mockito.mockingDetails(accessTokenRepository);
    if (mockingDetails.isMock()) {
        when(accessTokenRepository.findByAccessToken(accessToken.accessToken))
                .thenReturn(Optional.of(accessToken.accessTokenEntity()));
    }/* w  ww .j  a v a  2 s . c o m*/

    context.setAuthentication(oauth2);
    return context;
}

From source file:com.liferay.blade.cli.util.Prompter.java

private static Optional<Boolean> _getBooleanAnswer(String questionWithPrompt, InputStream inputStream,
        PrintStream printStream, Optional<Boolean> defaultAnswer) {

    Optional<Boolean> answer = null;

    try (CloseShieldInputStream closeShieldInputStream = new CloseShieldInputStream(inputStream);
            Scanner scanner = new Scanner(closeShieldInputStream)) {

        while ((answer == null) || !answer.isPresent()) {
            printStream.println(questionWithPrompt);

            String readLine = null;

            while (((answer == null) || !answer.isPresent()) && !Objects.equals(answer, defaultAnswer)
                    && scanner.hasNextLine()) {

                readLine = scanner.nextLine();

                if (readLine != null) {
                    readLine = readLine.toLowerCase();

                    switch (readLine.trim()) {
                    case "y":
                    case "yes":
                        answer = Optional.of(true);

                        break;
                    case "n":
                    case "no":
                        answer = Optional.of(false);

                        break;
                    default:
                        if (defaultAnswer.isPresent()) {
                            answer = defaultAnswer;
                        } else {
                            printStream.println("Unrecognized input: " + readLine);

                            continue;
                        }//from   www  .j ava  2s. co m

                        break;
                    }
                } else {
                    answer = defaultAnswer;
                }
            }
        }
    } catch (IllegalStateException ise) {
        throw new RuntimeException(ise);
    } catch (Exception exception) {
        if (defaultAnswer.isPresent()) {
            answer = defaultAnswer;
        }
    }

    return answer;
}

From source file:org.onosproject.sdxl3.config.SdxParticipantsConfig.java

/**
 * Gets the set of configured BGP peers.
 *
 * @return BGP peers/*from  ww  w.j a  va  2s  .  co m*/
 */
public Set<PeerConfig> bgpPeers() {
    Set<PeerConfig> peers = Sets.newHashSet();

    JsonNode peersNode = object.get(PEERS);

    if (peersNode == null) {
        return peers;
    }
    peersNode.forEach(jsonNode -> {
        Optional<String> name;
        if (jsonNode.get(NAME) == null) {
            name = Optional.empty();
        } else {
            name = Optional.of(jsonNode.get(NAME).asText());
        }

        peers.add(new PeerConfig(name, IpAddress.valueOf(jsonNode.path(IP).asText()),
                ConnectPoint.deviceConnectPoint(jsonNode.path(CONN_POINT).asText()),
                jsonNode.path(INTF_NAME).asText()));
    });

    return peers;
}

From source file:com.github.cbismuth.fdupes.collect.PathAnalyser.java

public Optional<Path> getTimestampPath(final Path destination, final Path path) {
    final Optional<Path> result;

    final String name = FilenameUtils.getName(path.toString());

    final Matcher matcher_1 = PATTERN_1.matcher(name);
    if (matcher_1.matches()) {
        result = Optional.of(onMatch(destination, matcher_1));
    } else {/*from   ww w  .  j a v a 2 s .com*/
        final Matcher matcher_2 = PATTERN_2.matcher(name);
        if (matcher_2.matches()) {
            result = Optional.of(onMatch(destination, matcher_2));
        } else {
            LOGGER.warn("File [{}] doesn't match pattern", path);

            result = Optional.empty();
        }
    }

    return result;
}

From source file:alfio.controller.support.TemplateProcessorTest.java

private void assertDimensionsUnder300x150(Pair<String, String> p) {
    Map<String, String> parameters = new HashMap<>();
    parameters.put(FileBlobMetadata.ATTR_IMG_WIDTH, p.getLeft());
    parameters.put(FileBlobMetadata.ATTR_IMG_HEIGHT, p.getRight());
    FileBlobMetadata metadata = mock(FileBlobMetadata.class);
    when(metadata.getAttributes()).thenReturn(parameters);
    Event e = mock(Event.class);
    when(e.getFileBlobIdIsPresent()).thenReturn(true);
    FileUploadManager fileUploadManager = mock(FileUploadManager.class);
    when(fileUploadManager.findMetadata(e.getFileBlobId())).thenReturn(Optional.of(metadata));
    TemplateProcessor.extractImageModel(e, fileUploadManager).ifPresent(imageData -> {
        assertTrue(imageData.getImageWidth() <= 300);
        assertTrue(imageData.getImageHeight() <= 150);
    });//from  w  w w. ja va  2  s . c om
}