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.moo.propane.sources.ClasspathFileConfigurationSource.java

@Override
public Optional<ConfigData> read(final Class clazz) {

    try (InputStreamReader reader = new InputStreamReader(
            getClass().getClassLoader().getResourceAsStream(source))) {

        List<ConfigurationEntity> entities = new ArrayList<>();

        parse(getSource(), mapper.readTree(reader), new ArrayList<>(), entities, 0);

        return Optional.of(new ConfigData(getSource(), entities));

    } catch (IOException e) {
        LOG.error(e);//  w  w  w  . j a va  2 s.c  om
        return Optional.empty();
    }
}

From source file:org.ow2.proactive.workflow_catalog.rest.controller.WorkflowRevisionControllerTest.java

@Test
public void testList() throws Exception {
    Pageable mockedPageable = mock(Pageable.class);
    PagedResourcesAssembler mockedAssembler = mock(PagedResourcesAssembler.class);
    workflowRevisionController.list(BUCKET_ID, WF_ID, Optional.empty(), mockedPageable, mockedAssembler);
    verify(workflowRevisionService, times(1)).listWorkflows(BUCKET_ID, Optional.of(WF_ID), Optional.empty(),
            mockedPageable, mockedAssembler);
}

From source file:org.zalando.logbook.httpclient.Request.java

@Override
public String getContentType() {
    return Optional.of(request).map(request -> request.getFirstHeader("Content-Type")).map(Header::getValue)
            .orElse("");
}

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

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

    Optional<DOI> doi = DOI.build(entry.getField("doi"));

    if (doi.isPresent()) {
        String sciLink = doi.get().getURLAsASCIIString();

        // follow all redirects and scan for a single pdf link
        if (!sciLink.isEmpty()) {
            try {
                Connection connection = Jsoup.connect(sciLink);
                connection.followRedirects(true);
                connection.ignoreHttpErrors(true);
                // some publishers are quite slow (default is 3s)
                connection.timeout(5000);

                Document html = connection.get();
                // scan for PDF
                Elements elements = html.body().select("[href]");
                List<Optional<URL>> links = new ArrayList<>();

                for (Element element : elements) {
                    String href = element.attr("abs:href");
                    // Only check if pdf is included in the link
                    // See https://github.com/lehner/LocalCopy for scrape ideas
                    if (href.contains("pdf") && MimeTypeDetector.isPdfContentType(href)) {
                        links.add(Optional.of(new URL(href)));
                    }//from  w ww .  j ava 2  s.  c  o m
                }
                // return if only one link was found (high accuracy)
                if (links.size() == 1) {
                    LOGGER.info("Fulltext PDF found @ " + sciLink);
                    pdfLink = links.get(0);
                }
            } catch (IOException e) {
                LOGGER.warn("DoiResolution fetcher failed: ", e);
            }
        }
    }
    return pdfLink;
}

From source file:jobhunter.persistence.Persistence.java

private Optional<Profile> _readProfile(final File file) {

    try (ZipFile zfile = new ZipFile(file)) {
        l.debug("Reading profile from JHF File");
        final InputStream in = zfile.getInputStream(new ZipEntry("profile.xml"));

        MessageDigest md = MessageDigest.getInstance("MD5");
        DigestInputStream dis = new DigestInputStream(in, md);

        final Object obj = xstream.fromXML(dis);

        updateLastMod(file, md);//from   w  ww  .j  a  v a 2  s  .c om

        return Optional.of((Profile) obj);
    } catch (Exception e) {
        l.error("Failed to read file: {}", e.getMessage());
    }

    return Optional.empty();
}

From source file:org.sonarqube.shell.commands.SonarSession.java

void connect(String host, Integer port, String protocol) {
    try {//  ww  w.j av a 2 s  . com
        URI uri = new URL(protocol, host, port, "").toURI();
        consoleOut(String.format("Connecting to: %s", uri));
        rootContext = client.target(uri);
        Optional<Status> status = get("api/system/status", Status.class, empty());
        if (status.isPresent()) {
            consoleOut("Successfully connected to: " + rootContext.getUri());
            consoleOut("Server " + status.get().toString());
            return;
        }
        Optional<QualityGates> failover = get("api/qualitygates/list", QualityGates.class, empty());
        if (failover.isPresent()) {
            consoleOut("Successfully connected to: " + rootContext.getUri());
            return;
        }
    } catch (URISyntaxException | MalformedURLException e) {
        LOGGER.error("Failed to create URI", e);
    }
    disconnect(Optional.of("Server connection failed"));
}

From source file:com.ejisto.util.collector.FieldNode.java

public Optional<FieldNode> findDirectParent(MockedField mockedField) {
    String difference = difference(path, mockedField.getComparisonKey());
    if (isNotEmpty(difference) && difference.substring(1).equals(mockedField.getFieldName())) {
        return Optional.of(this);
    }//ww  w  . j  av  a2  s . c  om
    return children.stream().filter(c -> c.isParentOf(mockedField)).map(c -> c.findDirectParent(mockedField))
            .filter(Optional::isPresent).map(Optional::get).findAny();
}

From source file:it.polimi.diceH2020.SPACE4Cloud.shared.inputData.old.InstanceData_old.java

public InstanceData_old(String id, int gamma, String provider, List<JobClass_old> classes,
        Map<String, List<TypeVM>> types, Map<TypeVMJobClassKey, Profile_old> profiles) {
    this.id = id;
    this.setGamma(gamma);
    this.setProvider(provider);
    this.scenario = Optional.of(Scenarios.PublicPeakWorkload);
    lstClass = classes;/*from  w w w.ja  v  a2  s  .  c  o  m*/
    mapTypeVMs = Optional.of(types);
    mapProfiles = profiles;
}

From source file:ninja.eivind.hotsreplayuploader.versions.ReleaseManager.java

public Optional<GitHubRelease> getNewerVersionIfAny() {
    final ReleaseComparator releaseComparator = new ReleaseComparator();
    try {/*from w w w  .  j ava 2s .c  o m*/
        final List<GitHubRelease> latest = getLatest();
        latest.sort(releaseComparator);

        final GitHubRelease latestRelease = latest.get(0);
        final int compare = releaseComparator.compare(currentRelease, latestRelease);
        if (!latest.isEmpty() && compare > 0) {
            LOG.info("Newer  release is: " + latestRelease);
            return Optional.of(latestRelease);
        } else {
            LOG.info(currentRelease + " is the newest version.");
        }
    } catch (IOException e) {
        LOG.error("Unable to get latest versions", e);
    }
    return Optional.empty();
}

From source file:org.openmhealth.shim.misfit.mapper.MisfitPhysicalActivityDataPointMapper.java

@Override
public Optional<DataPoint<PhysicalActivity>> asDataPoint(JsonNode sessionNode) {

    checkNotNull(sessionNode);//from   w  ww  . j av  a2 s .co m

    String activityName = asRequiredString(sessionNode, "activityType");

    PhysicalActivity.Builder builder = new PhysicalActivity.Builder(activityName);

    Optional<Double> distance = asOptionalDouble(sessionNode, "distance");

    if (distance.isPresent()) {
        builder.setDistance(new LengthUnitValue(MILE, distance.get()));
    }

    Optional<OffsetDateTime> startDateTime = asOptionalOffsetDateTime(sessionNode, "startTime");
    Optional<Double> durationInSec = asOptionalDouble(sessionNode, "duration");

    if (startDateTime.isPresent() && durationInSec.isPresent()) {
        DurationUnitValue durationUnitValue = new DurationUnitValue(SECOND, durationInSec.get());
        builder.setEffectiveTimeFrame(ofStartDateTimeAndDuration(startDateTime.get(), durationUnitValue));
    }

    asOptionalBigDecimal(sessionNode, "calories")
            .ifPresent(calories -> builder.setCaloriesBurned(new KcalUnitValue(KILOCALORIE, 96.8)));

    PhysicalActivity measure = builder.build();

    Optional<String> externalId = asOptionalString(sessionNode, "id");

    return Optional.of(newDataPoint(measure, RESOURCE_API_SOURCE_NAME, externalId.orElse(null), null));
}