Example usage for com.google.common.base Optional of

Introduction

In this page you can find the example usage for com.google.common.base Optional of.

Prototype

public static <T> Optional<T> of(T reference)

Source Link

Document

Returns an Optional instance containing the given non-null reference.

Usage

From source file:com.github.rinde.rinsim.ui.renderers.PointUtil.java

static Optional<Point> intersectionPoint(Point own1, Point own2, Point oth1, Point oth2) {

    final double dx1 = own2.x - own1.x;
    final double dy1 = own2.y - own1.y;
    final double dx2 = oth2.x - oth1.x;
    final double dy2 = oth2.y - oth1.y;

    final double angle1 = Math.PI + Math.atan2(-dy1, -dx1);
    final double angle2 = Math.PI + Math.atan2(-dy2, -dx2);

    final double sin1 = Math.sin(angle1);
    final double sin2 = Math.sin(angle2);
    final double cos1 = Math.cos(angle1);
    final double cos2 = Math.cos(angle2);

    final double d = sin1 * cos2 - sin2 * cos1;
    if (Math.abs(d) < TOLERANCE) {
        return Optional.absent();
    }/*from   ww  w  .j ava 2s. c o  m*/
    final double d1 = Math.hypot(dx1, dy1);
    final double d2 = Math.hypot(dx2, dy2);
    final double offset1 = own2.x * own1.y - own1.x * own2.y / d1;
    final double offset2 = oth2.x * oth1.y - oth1.x * oth2.y / d2;

    return Optional.of(new Point((cos1 * offset2 - cos2 * offset1) / d, (sin1 * offset2 - sin2 * offset1) / d));
}

From source file:fi.vm.sade.osoitepalvelu.kooste.common.util.CriteriaHelper.java

public static Optional<Criteria> inAnyKoodiVersion(Criteria c, String key, Collection<String> koodis) {
    if (koodis == null || koodis.isEmpty()) {
        return Optional.absent();
    }/* w w w  .  jav  a  2s. co m*/

    Criteria[] criteria = new Criteria[koodis.size()];
    int i = 0;
    for (String koodi : koodis) {
        // Strip the version part if specified:
        Matcher m = KOODI_WITH_VERSION.matcher(koodi);
        if (m.find()) {
            koodi = m.group(1);
        }
        criteria[i++] = Criteria.where(key).regex(Pattern.compile(koodi + OPTIONAL_KOODI_VERSION_POSTFIX));
    }
    return Optional.of(c.orOperator(criteria));
}

From source file:com.stepstone.sonar.plugin.coldfusion.cflint.xml.TagAttribute.java

protected Optional<String> getAttributeValue(String name, XMLStreamReader stream) {

    for (int i = 0; i < stream.getAttributeCount(); i++) {

        if (name.equalsIgnoreCase(stream.getAttributeLocalName(i))) {
            return Optional.of(StringUtils.trimToEmpty(stream.getAttributeValue(i)));
        }//from  w  w w  . j a  v  a 2  s .  c om
    }

    return Optional.absent();
}

From source file:com.spotify.helios.cli.command.TargetAndClient.java

public TargetAndClient(final Target target, final HeliosClient client) {
    this.target = Optional.of(Preconditions.checkNotNull(target));
    this.client = client;
}

From source file:org.terasology.commonworld.geom.BoundingBox.java

/**
 * @param pts a collection of Vector2is//from   w w  w .  ja  va2s . co m
 * @return the bounding rectangle of pts or absent() if pts is empty
 */
public static Optional<Rectangle> getBoundingRect(Collection<Vector2i> pts) {
    if (pts.isEmpty()) {
        return Optional.absent();
    }

    BoundingBox bbox = new BoundingBox(pts);
    return Optional.of(bbox.toRectangle());
}

From source file:im.dadoo.teak.biz.bo.impl.DefaultSignBO.java

@Override
public Optional<UserPO> signin(String name, String password) {
    UserPO userPO = this.userDAO.findByName(name);
    if (userPO != null && userPO.getPassword().equals(password)) {
        return Optional.of(userPO);
    } else {/*ww  w . j  ava2  s . c  o  m*/
        return Optional.absent();
    }
}

From source file:org.jclouds.compute.util.AutomaticHardwareIdSpec.java

public static AutomaticHardwareIdSpec parseId(String hardwareId) {
    AutomaticHardwareIdSpec spec = new AutomaticHardwareIdSpec();
    String hardwareSpec = hardwareId.substring(10);
    Map<String, String> specValues = Splitter.on(';').trimResults().omitEmptyStrings()
            .withKeyValueSeparator('=').split(hardwareSpec);
    if (!specValues.containsKey("ram") || !specValues.containsKey("cores")) {
        throw new IllegalArgumentException(String.format(
                "Omitted keys on hardwareId: %s. Please set number " + "of cores and ram amount.", hardwareId));
    }/*from   ww  w . ja  v  a  2s .  c o m*/
    if (specValues.containsKey("disk")) {
        float disk = Float.parseFloat(specValues.get("disk"));
        if (disk > 0.0f) {
            spec.disk = Optional.of(disk);
        } else {
            throw new IllegalArgumentException(String.format("Invalid disk value: %s", hardwareId));
        }
    }
    spec.ram = Integer.parseInt(specValues.get("ram"));
    spec.cores = Double.parseDouble(specValues.get("cores"));
    return spec;
}

From source file:org.eclipse.mylyn.internal.wikitext.commonmark.inlines.BackslashEscapeSpan.java

@Override
public Optional<? extends Inline> createInline(Cursor cursor) {
    char c = cursor.getChar();
    if (c == '\\' && cursor.hasNext()) {
        if (cursor.getNext() == '\n') {
            return Optional.of(new HardLineBreak(cursor.getLineAtOffset(), cursor.getOffset(), 2));
        } else if (ESCAPABLE.matches(cursor.getNext())) {
            return Optional
                    .of(new EscapedCharacter(cursor.getLineAtOffset(), cursor.getOffset(), cursor.getNext()));
        }//from   ww  w. j a  v  a  2s .  co  m
    }
    return Optional.absent();
}

From source file:springfox.documentation.swagger1.web.ApiListingMerger.java

public static Optional<ApiListing> mergedApiListing(Collection<ApiListing> apiListings) {
    if (nullToEmptyList(apiListings).size() > 1) {
        ApiListing merged = new ApiListing();
        merged.setSwaggerVersion("1.2");
        merged.setPosition(0);/*w w  w .  j  a va2 s . co  m*/
        for (ApiListing each : apiListings) {
            merged.setApiVersion(each.getApiVersion());
            merged.setBasePath(each.getBasePath());
            merged.setResourcePath(each.getResourcePath());
            merged.setDescription(each.getDescription());
            merged.appendAuthorizations(each.getAuthorizations());
            merged.appendApis(each.getApis());
            merged.appendProtocols(newHashSet(each.getProtocols()));
            merged.appendConsumes(newHashSet(each.getConsumes()));
            merged.appendModels(each.getModels());
            merged.appendProduces(newHashSet(each.getProduces()));
        }
        return Optional.of(merged);
    }
    return from(nullToEmptyList(apiListings)).first();
}

From source file:org.sfs.util.ExceptionHelper.java

public static <T extends Throwable> Optional<T> unwrapCause(Class<T> exception, Throwable t) {
    int counter = 0;
    Throwable result = t;/*from   w ww  .j av  a 2  s  . c om*/
    while (result != null && !exception.isAssignableFrom(result.getClass())) {
        if (result.getCause() == null) {
            return Optional.absent();
        }
        if (result.getCause() == result) {
            return Optional.absent();
        }
        if (counter++ > 10) {
            LOGGER.warn("Exception cause unwrapping ran for 10 levels...", t);
            return Optional.absent();
        }
        result = result.getCause();
    }
    if (exception.isAssignableFrom(result.getClass())) {
        return Optional.of((T) result);
    } else {
        return Optional.absent();
    }
}