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:net.hamnaberg.json.ValueFactory.java

public static Optional<Value> createOptionalValue(JsonNode value) {
    if (value == null) {
        return Optional.empty();
    }//from  w w  w.jav a2 s.c o m
    Value v = createValue(value);
    if (v.isNull()) {
        return Optional.empty();
    }
    return Optional.of(v);
}

From source file:com.formkiq.core.util.Zips.java

/**
 * Find bytes in zip by name./*from w ww .  j a  v a 2s.  co m*/
 * @param bytes byte[]
 * @param name {@link String}
 * @return {@link Optional}
 * @throws IOException IOException
 */
public static Optional<byte[]> findInZip(final byte[] bytes, final String name) throws IOException {

    Map<String, byte[]> map = Zips.extractZipToMap(bytes);
    if (map.containsKey(name)) {
        return Optional.of(map.get(name));
    }

    return Optional.empty();
}

From source file:com.facebook.buck.util.unarchive.Untar.java

public static Untar bzip2Unarchiver() {
    return new Untar(Optional.of(CompressorStreamFactory.BZIP2));
}

From source file:com.orange.ngsi2.utility.Utils.java

static public List<Entity> createListEntitiesReference() {

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

    Entity entityRoomDC = new Entity("DC_S1-D41", "Room");
    entityRoomDC.setAttributes("temperature", new Attribute(35.6));
    entities.add(entityRoomDC);//ww w .  jav  a2s. com

    Entity entityRoomBoe = new Entity("Boe-Idearium", "Room");
    entityRoomBoe.setAttributes("temperature", new Attribute(22.5));
    entities.add(entityRoomBoe);

    Entity entityCar = new Entity("P-9873-K", "Car");
    Attribute speedAttribute = new Attribute(100);
    speedAttribute.setType(Optional.of("number"));
    Metadata accuracyMetadata = new Metadata();
    accuracyMetadata.setValue(2);
    Metadata timestampMetadata = new Metadata();
    timestampMetadata.setValue("2015-06-04T07:20:27.378Z");
    timestampMetadata.setType("date");
    speedAttribute.addMetadata("accuracy", accuracyMetadata);
    speedAttribute.addMetadata("timestamp", timestampMetadata);
    entityCar.setAttributes("speed", speedAttribute);
    entities.add(entityCar);

    return entities;
}

From source file:cloudfoundry.norouter.f5.client.SubCollection.java

public SubCollection(@JsonProperty("link") URI link, @JsonProperty("items") Collection<T> items) {
    this.link = link;
    if (items == null) {
        this.items = Optional.empty();
    } else {/*from ww w.java 2s .  c  o m*/
        items = Collections.unmodifiableCollection(new ArrayList<>(items));
        this.items = Optional.of(items);
    }
}

From source file:de.ii.xtraplatform.feature.provider.wfs.FeatureProviderDataWfs.java

@Override
@Value.Derived//from   w w  w. jav a  2s .  co  m
public Optional<String> getDataSourceUrl() {
    URIBuilder uriBuilder = new URIBuilder(getConnectionInfo().getUri());
    return Optional.of(
            uriBuilder.addParameter("SERVICE", "WFS").addParameter("REQUEST", "GetCapabilities").toString());
}

From source file:org.openmhealth.shim.withings.mapper.WithingsHeartRateDataPointMapper.java

@Override
public Optional<Measure.Builder<HeartRate, ?>> newMeasureBuilder(JsonNode measuresNode) {

    Optional<BigDecimal> value = getValueForMeasureType(measuresNode, HEART_RATE);

    if (!value.isPresent()) {
        return empty();
    }/*from  ww w .  j  a va  2s .c o m*/

    return Optional.of(new HeartRate.Builder(value.get()));
}

From source file:org.lendingclub.mercator.aws.ASGScanner.java

@Override
public Optional<String> computeArn(JsonNode n) {
    return Optional.of(n.path("aws_autoScalingGroupARN").asText());
}

From source file:net.sf.jabref.importer.fetcher.BibsonomyScraper.java

/**
 * Return a BibEntry by looking up the given url from the BibSonomy scraper.
 * @param entryUrl/*from w  w w  .  jav  a  2  s  .  c o  m*/
 * @return
 */
public static Optional<BibEntry> getEntry(String entryUrl) {
    try {
        // Replace special characters by corresponding sequences:
        String cleanURL = entryUrl.replace("%", "%25").replace(":", "%3A").replace("/", "%2F")
                .replace("?", "%3F").replace("&", "%26").replace("=", "%3D");

        URL url = new URL(
                BibsonomyScraper.BIBSONOMY_SCRAPER + cleanURL + BibsonomyScraper.BIBSONOMY_SCRAPER_POST);
        String bibtex = new URLDownload(url).downloadToString(StandardCharsets.UTF_8);
        BibtexParser bp = new BibtexParser(new StringReader(bibtex));
        ParserResult pr = bp.parse();
        if ((pr != null) && pr.getDatabase().hasEntries()) {
            return Optional.of(pr.getDatabase().getEntries().iterator().next());
        } else {
            return Optional.empty();
        }

    } catch (IOException ex) {
        LOGGER.warn("Could not download entry", ex);
        return Optional.empty();
    } catch (RuntimeException ex) {
        LOGGER.warn("Could not get entry", ex);
        return Optional.empty();
    }
}

From source file:de.is24.aws.instancemetadataserver.RemoteHostRoleNameProducer.java

private Optional<String> toRoleName(String hostName) {
    return Optional.of(hostName).flatMap(this::getHostPart).flatMap(this::stripHostNr)
            .flatMap(this::unifyHamAndBerToPro).map(this::addRzPrefix);
}