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:io.kamax.mxisd.dns.FederationDnsOverwrite.java

public Optional<String> findHost(String lookup) {
    Entry mapping = mappings.get(lookup);
    if (mapping == null) {
        return Optional.empty();
    }//from   www  .  j  a v a  2  s  .  c  o m

    return Optional.of(mapping.getValue());
}

From source file:com.github.horrorho.inflatabledonkey.cloud.clients.MBKSyncClient.java

public static Optional<ProtectionZone> mbksync(HttpClient httpClient, CloudKitty kitty,
        Collection<Key<ECPrivate>> keys) throws IOException {

    List<CloudKit.ZoneRetrieveResponse> responses = kitty.zoneRetrieveRequest(httpClient, "_defaultZone",
            "mbksync");
    logger.debug("-- baseZones() - responses: {}", responses);

    if (responses.size() != 2) {
        logger.warn("-- baseZones() - bad response list size: {}", responses);
        return Optional.empty();
    }//  w w  w . j ava  2  s  .  c o m

    ProtectionZone zone = ProtectionZone.createBaseZone(keys);

    List<CloudKit.ProtectionInfo> protectionInfoList = zone(responses, zone);
    for (CloudKit.ProtectionInfo protectionInfo : protectionInfoList) {
        zone = zone.newProtectionZone(protectionInfo).orElse(zone);
    }
    return Optional.of(zone);
}

From source file:de.lgblaumeiser.ptm.store.filesystem.FileStore.java

@Override
public Optional<T> retrieveById(Long id) {
    checkState(id != null);//w  w w.  ja  v a 2 s .  c  om
    File searchedFile = getFileInformation(id);
    if (!filesystemAccess.dataAvailable(searchedFile)) {
        return Optional.empty();
    }
    try {
        return Optional.of(extractFileContent(filesystemAccess.retrieveFromFile(searchedFile)));
    } catch (IOException e) {
        return Optional.empty();
    }
}

From source file:com.devicehive.dao.rdbms.NetworkDaoRdbmsImpl.java

@Override
public List<NetworkVO> findByName(String name) {
    List<Network> result = createNamedQuery(Network.class, "Network.findByName", Optional.of(CacheConfig.get()))
            .setParameter("name", name).getResultList();
    Stream<NetworkVO> objectStream = result.stream().map(Network::convertNetwork);
    return objectStream.collect(Collectors.toList());
}

From source file:org.openmhealth.shim.runkeeper.mapper.RunkeeperPhysicalActivityDataPointMapper.java

@Override
protected Optional<DataPoint<PhysicalActivity>> asDataPoint(JsonNode itemNode) {

    PhysicalActivity measure = getMeasure(itemNode);
    DataPointHeader header = getDataPointHeader(itemNode, measure);

    return Optional.of(new DataPoint<>(header, measure));
}

From source file:org.openwms.core.ServiceLayerExceptionTranslator.java

/**
 * Override method to handle the transaction yourself and skip to the default exception handling .
 *
 * @param ex Exception to handle/*from  w  w w . j a  v a 2 s.  c  o  m*/
 * @return An empty Optional to use the default exception handling or an Exception to skip default handling
 */
@Override
protected Optional<Exception> doTranslateException(Exception ex) {
    if (ex instanceof ConstraintViolationException) {
        return Optional.of(ex);
    }
    if (ex instanceof ServiceLayerException) {
        return Optional.of(ex);
    }
    return Optional.of(new ServiceLayerException(ex.getMessage()));
}

From source file:org.trustedanalytics.cloud.cc.api.CcSpace.java

@JsonIgnore
public String getName() {
    Optional<CcSpace> space = Optional.of(this);
    return space.map(CcSpace::getEntity).map(CcSpaceEntity::getName).orElse(null);
}

From source file:org.springsource.restbucks.payment.PaymentRepositoryIntegrationTest.java

@Test
public void savesCreditCardPayment() {

    CreditCard creditCard = creditCards.save(createCreditCard());
    Order order = orders.save(createOrder());

    CreditCardPayment payment = payments.save(new CreditCardPayment(creditCard, order));

    assertThat(payment.getId(), is(notNullValue()));
    assertThat(payments.findByOrder(order), is(Optional.of(payment)));
}

From source file:org.springsource.restbucks.payment.PaymentServiceIntegrationTest.java

@Test
public void marksOrderAsPaid() {

    Order order = orders.save(createOrder());
    CreditCard creditCard = creditCards.save(createCreditCard());
    CreditCardPayment payment = paymentService.pay(order, creditCard.getNumber());

    assertThat(paymentService.getPaymentFor(order), is(Optional.of(payment)));
    assertThat(order.isPaid(), is(true));
}

From source file:com.create.security.RepositoryUserDetailsService.java

private User getUser(String username) {
    return Optional.of(username).map(userRepository::findByUsername).filter(Objects::nonNull)
            .orElseThrow(() -> new UsernameNotFoundException("User " + username + " does not exists"));
}