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:com.atlassian.connect.spring.internal.AtlassianConnectContextModelAttributeProvider.java

private Optional<String> getHostBaseUrlFromQueryParameters() {
    String hostUrl = request.getParameter("xdm_e");
    String contextPath = request.getParameter("cp");

    Optional<String> optionalBaseUrl = Optional.empty();
    if (!StringUtils.isEmpty(hostUrl)) {
        if (!StringUtils.isEmpty(contextPath)) {
            optionalBaseUrl = Optional.of(hostUrl + contextPath);
        } else {// w  w  w  . j  a v  a 2s  .c  o m
            optionalBaseUrl = Optional.of(hostUrl);
        }
    }
    return optionalBaseUrl;
}

From source file:net.sf.jabref.logic.fetcher.ScienceDirect.java

@Override
public Optional<URL> findFullText(BibEntry entry) throws IOException {
    Objects.requireNonNull(entry);
    Optional<URL> pdfLink = Optional.empty();

    // Try unique DOI first
    Optional<DOI> doi = DOI.build(entry.getField("doi"));

    if (doi.isPresent()) {
        // Available in catalog?
        try {/*w  w w .  ja v a 2 s. c om*/
            String sciLink = getUrlByDoi(doi.get().getDOI());

            if (!sciLink.isEmpty()) {
                // Retrieve PDF link
                Document html = Jsoup.connect(sciLink).ignoreHttpErrors(true).get();
                Element link = html.getElementById("pdfLink");

                if (link != null) {
                    LOGGER.info("Fulltext PDF found @ ScienceDirect.");
                    pdfLink = Optional.of(new URL(link.attr("pdfurl")));
                }
            }
        } catch (UnirestException e) {
            LOGGER.warn("ScienceDirect API request failed", e);
        }
    }
    return pdfLink;
}

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

static Optional<KeyBag> keyBag(CloudKit.RecordRetrieveResponse response, ProtectionZone zone) {
    Optional<byte[]> keyBagData = field(response.getRecord(), "keybagData", zone::decrypt);
    if (!keyBagData.isPresent()) {
        logger.warn("-- keyBag() - failed to acquire key bag");
        return Optional.empty();
    }//from w  w  w .ja  va  2  s .co m

    Optional<byte[]> secret = field(response.getRecord(), "secret", zone::decrypt);
    if (!secret.isPresent()) {
        logger.warn("-- keyBag() - failed to acquire key bag pass code");
        return Optional.empty();
    }

    KeyBag keyBag = KeyBagFactory.create(keyBagData.get(), secret.get());
    return Optional.of(keyBag);
}

From source file:net.sf.jabref.logic.fulltext.SpringerLink.java

@Override
public Optional<URL> findFullText(BibEntry entry) throws IOException {
    Objects.requireNonNull(entry);
    Optional<URL> pdfLink = Optional.empty();

    // Try unique DOI first
    Optional<DOI> doi = entry.getFieldOptional(FieldName.DOI).flatMap(DOI::build);

    if (doi.isPresent()) {
        // Available in catalog?
        try {//  w ww.j av a2 s  . co m
            HttpResponse<JsonNode> jsonResponse = Unirest.get(API_URL).queryString("api_key", API_KEY)
                    .queryString("q", String.format("doi:%s", doi.get().getDOI())).asJson();

            JSONObject json = jsonResponse.getBody().getObject();
            int results = json.getJSONArray("result").getJSONObject(0).getInt("total");

            if (results > 0) {
                LOGGER.info("Fulltext PDF found @ Springer.");
                pdfLink = Optional.of(new URL("http", CONTENT_HOST,
                        String.format("/content/pdf/%s.pdf", doi.get().getDOI())));
            }
        } catch (UnirestException e) {
            LOGGER.warn("SpringerLink API request failed", e);
        }
    }
    return pdfLink;
}

From source file:org.openmhealth.shim.ihealth.mapper.IHealthBodyWeightDataPointMapper.java

@Override
protected Optional<DataPoint<BodyWeight>> asDataPoint(JsonNode listEntryNode, Integer measureUnitMagicNumber) {

    checkNotNull(measureUnitMagicNumber);

    IHealthBodyWeightUnit bodyWeightUnitType = IHealthBodyWeightUnit.fromIntegerValue(measureUnitMagicNumber);
    MassUnit bodyWeightUnit = bodyWeightUnitType.getOmhUnit();

    double bodyWeightValue = getBodyWeightValueForUnitType(listEntryNode, bodyWeightUnitType);

    if (bodyWeightValue == 0) {

        return Optional.empty();
    }//from   w ww  .java2  s. com

    BodyWeight.Builder bodyWeightBuilder = new BodyWeight.Builder(
            new MassUnitValue(bodyWeightUnit, bodyWeightValue));

    getEffectiveTimeFrameAsDateTime(listEntryNode).ifPresent(bodyWeightBuilder::setEffectiveTimeFrame);

    getUserNoteIfExists(listEntryNode).ifPresent(bodyWeightBuilder::setUserNotes);

    BodyWeight bodyWeight = bodyWeightBuilder.build();

    return Optional.of(new DataPoint<>(createDataPointHeader(listEntryNode, bodyWeight), bodyWeight));
}

From source file:com.ikanow.aleph2.distributed_services.utils.TestKafkaUtils.java

License:asdf

@Test
public void test_kafkaConnectionFromZookeeper() throws Exception {
    final ObjectMapper mapper = BeanTemplateUtils.configureMapper(Optional.empty());
    assertEquals(Integer.toString(_cds.getKafkaBroker().getBrokerPort()), KafkaUtils
            .getBrokerListFromZookeeper(_cds.getCuratorFramework(), Optional.empty(), mapper).split(":")[1]);
    assertEquals(Integer.toString(_cds.getKafkaBroker().getBrokerPort()),
            KafkaUtils/*from w w  w.ja  v a 2 s  .c o m*/
                    .getBrokerListFromZookeeper(_cds.getCuratorFramework(), Optional.of("/brokers/ids"), mapper)
                    .split(":")[1]);
}

From source file:lumbermill.internal.http.PostHandler.java

public PostHandler(Codec<IN> codec, OnPostCreatedCallback callback) {
    this.httpHandlerSupplier = Optional.of(new CodecHttpHandlerWrapper(codec));
    this.callback = callback;
}

From source file:com.google.testing.web.screenshotter.Screenshotter.java

/** Returns a copy of this configured to take a screenshot of element. */
public Screenshotter of(WebElement element) {
    return new Screenshotter(this.url, Optional.of(element), this.excluding);
}

From source file:com.vsct.dt.strowgr.admin.template.locator.UriTemplateLocator.java

public Optional<String> readTemplate(String uri) {
    try {//from   w w w. jav a  2s  .c  o m
        HttpGet getTemplate = new HttpGet(uri);
        getTemplate.addHeader("Content-Type", "text/plain; charset=utf-8");
        LOGGER.debug("get template {}", uri);
        return client.execute(getTemplate, (response) -> {
            Optional<String> result = Optional.empty();
            int status = response.getStatusLine().getStatusCode();
            if (status >= 200 && status < 300) {
                HttpEntity entity = response.getEntity();
                String entitySer = EntityUtils.toString(entity, "UTF-8");
                if (entitySer == null) {
                    throw new IllegalStateException("template from " + uri + " has null content.");
                } else {
                    LOGGER.debug("template from " + uri + " starts with "
                            + entitySer.substring(0, Math.max(20, entitySer.length())));
                }
                result = Optional.of(entitySer);
            } else if (status != 404) {
                throw new ClientProtocolException("Unexpected response status: " + status);
            }
            return result;
        });
    } catch (IOException e) {
        LOGGER.error("Can't retrieve template from " + uri, e);
        throw new RuntimeException(e);
    }
}

From source file:com.epam.training.service.impl.DefaultSergiiService.java

private Optional<CatalogUnawareMediaModel> findExistingLogo(final String logoCode) {
    final FlexibleSearchQuery fQuery = new FlexibleSearchQuery(FIND_LOGO_QUERY);
    fQuery.addQueryParameter("code", logoCode);

    try {//from   w  w  w. j a v a  2  s. c  o m
        return Optional.of(flexibleSearchService.searchUnique(fQuery));
    } catch (final SystemException e) {
        return Optional.empty();
    }
}