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.openmhealth.shim.withings.mapper.WithingsBodyHeightDataPointMapper.java

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

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

    if (!value.isPresent()) {
        return empty();
    }//from   www  . j ava2  s .co  m

    return Optional.of(new BodyHeight.Builder(new LengthUnitValue(METER, value.get())));
}

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

public static Untar xzUnarchiver() {
    return new Untar(Optional.of(CompressorStreamFactory.XZ));
}

From source file:com.macrossx.wechat.impl.WechatHelper.java

/**
 * {@code _token_time}<tokentoken(7200-60)
 *///  w w  w.j  av a 2s  . co m
public Optional<WechatAccessToken> getAccessToken() {
    try {
        if (System.currentTimeMillis() < _token_time) {
            return Optional.of(_access_token);
        }
        long current = System.currentTimeMillis();
        HttpGet httpGet = new HttpGet();
        httpGet.setURI(new URI(MessageFormat.format(WechatConstants.ACCESS_TOKEN_URL, appid, appsecret)));
        return new WechatHttpClient().send(httpGet, WechatAccessToken.class).map((e) -> {
            _access_token = e;
            _token_time = current + _access_token.getExpires_in() - 60;
            return _access_token;
        });
    } catch (URISyntaxException e) {
        log.info(e.getMessage());
        return Optional.empty();
    }

}

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

@Override
protected Optional<String> getMeasureUnitNodeName() {
    return Optional.of("WeightUnit");
}

From source file:com.comphenix.protocol.events.PacketMetadata.java

public static <T> Optional<T> get(Object packet, String key) {
    Validate.notNull(key, "Null keys are not permitted!");

    if (META_CACHE == null) {
        return Optional.empty();
    }/*from   ww w.  j  a va 2  s.  co  m*/

    List<MetaObject> meta = META_CACHE.getIfPresent(packet);
    if (meta == null) {
        return Optional.empty();
    }

    for (MetaObject object : meta) {
        if (object.key.equals(key)) {
            return Optional.of((T) object.value);
        }
    }

    return Optional.empty();
}

From source file:it.unibo.alchemist.SupportedIncarnations.java

/**
 * Fetches an incarnation whose name matches the supplied string.
 * //from   w w w  . ja v a  2 s .c  om
 * @param s
 *            the name of the {@link Incarnation}
 * @param <T>
 *            {@link Concentration} type
 * @return an {@link Optional} containing the incarnation, if one with a
 *         matching name exists
 */
@SuppressWarnings("unchecked")
public static <T> Optional<Incarnation<T>> get(final String s) {
    final String cmp = preprocess(s);
    return INCARNATIONS.stream()
            .map(clazz -> new Pair<>(METRIC.distance(preprocess(clazz.getSimpleName()), cmp), clazz))
            .min((p1, p2) -> Double.compare(p1.getFirst(), p2.getFirst())).map(Pair::getSecond)
            .flatMap(clazz -> {
                try {
                    return Optional.of(clazz.newInstance());
                } catch (Exception e) {
                    L.error("Unable to instance incarnation " + clazz + " (closest match to " + s + " among "
                            + INCARNATIONS + ")", e);
                    return Optional.empty();
                }
            });
}

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

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

    Optional<CaloriesBurned> caloriesBurned = getMeasure(itemNode);

    if (caloriesBurned.isPresent()) {
        return Optional
                .of(new DataPoint<>(getDataPointHeader(itemNode, caloriesBurned.get()), caloriesBurned.get()));
    } else {/*www  .  j a va  2  s . c o  m*/
        return Optional.empty(); // return empty if there was no calories information to generate a datapoint
    }

}

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

@JsonIgnore
public UUID getGuid() {
    Optional<CcSpace> space = Optional.of(this);
    return space.map(CcSpace::getMetadata).map(CcMetadata::getGuid).orElse(null);
}

From source file:ch.zweivelo.renderer.simple.shapes.Plane.java

@Override
public Optional<Double> calculateIntersectionDistance(final Ray ray) {
    double numerator = origin.subtract(ray.getOrigin()).dotProduct(normal);
    double denominator = ray.getDirection().dotProduct(normal);

    if (denominator == 0d) {
        if (numerator != 0d) {
            return Optional.empty();
        }//  www.  j  a  va  2 s.  c o m
        return Optional.of(ray.getInterval().getStart());
    }

    double distance = numerator / denominator;
    return ray.isValidT(distance) ? Optional.of(distance) : Optional.empty();
}

From source file:de.mas.wiiu.jnus.utils.FSTUtils.java

public static Optional<FSTEntry> getFileEntryDir(FSTEntry curEntry, String string) {
    string = string.replace(File.separator, "/");

    // We add the "/" at the end so we don't get false results when using the "startWith" function.
    if (!string.endsWith("/")) {
        string += "/";
    }//from w  ww . j a v  a 2 s.  co  m
    for (val curChild : curEntry.getDirChildren()) {
        String compareTo = curChild.getFullPath();
        if (!compareTo.endsWith("/")) {
            compareTo += "/";
        }
        if (string.startsWith(compareTo)) {
            if (string.equals(compareTo)) {
                return Optional.of(curChild);
            }
            return getFileEntryDir(curChild, string);
        }
    }

    return Optional.empty();
}