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

Introduction

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

Prototype

public static <T> Optional<T> absent()

Source Link

Document

Returns an Optional instance with no contained reference.

Usage

From source file:se.sics.sweep.webservice.toolbox.Result.java

public static Result badRequest(String reason) {
    return new Result(Status.BAD_REQUEST, Optional.of(reason), Optional.absent());
}

From source file:io.crate.planner.node.management.KillPlan.java

public KillPlan(UUID id) {
    this.id = id;
    this.jobToKill = Optional.absent();
}

From source file:de.flapdoodle.logparser.StreamMatcher.java

@Override
public Optional<IMatch<StreamEntry>> match(IReader reader, IBackBuffer backBuffer) throws IOException {
    Optional<String> optionalFirstLine = reader.nextLine();
    if (optionalFirstLine.isPresent()) {
        if (!optionalFirstLine.get().startsWith(">")) {
            return Optional.<IMatch<StreamEntry>>of(new StreamMatch(optionalFirstLine.get()));
        }//from w w  w .  j  a v  a 2  s .  c  o m
    }
    return Optional.absent();
}

From source file:io.github.cdelmas.spike.dropwizard.infrastructure.auth.FacebookTokenAuthenticator.java

@Override
public Optional<User> authenticate(String token) throws AuthenticationException {
    Try<User> user = accessTokenVerificationCommandFactory.createVerificationCommand(token).executeCommand();
    return user.toJavaOptional().map(Optional::of).orElse(Optional.absent());
}

From source file:se.sics.kompics.network.netty.MessageWrapper.java

MessageWrapper(Msg msg) {
    this.msg = msg;
    this.notify = Optional.absent();
}

From source file:google.registry.flows.domain.RegistryExtraFlowLogicProxy.java

public static Optional<RegistryExtraFlowLogic> newInstanceForTld(String tld) throws EppException {
    if (extraLogicOverrideMap.containsKey(tld)) {
        try {//www .j a  va 2  s .c  o m
            return Optional
                    .<RegistryExtraFlowLogic>of(extraLogicOverrideMap.get(tld).getConstructor().newInstance());
        } catch (ReflectiveOperationException ex) {
            throw new CommandFailedException();
        }
    }
    return Optional.absent();
}

From source file:org.gradle.model.internal.core.EmptyReferenceProjection.java

@Override
public Optional<String> getValueDescription(MutableModelNode mutableModelNode) {
    return Optional.absent();
}

From source file:org.opendaylight.netvirt.qosservice.UuidUtil.java

Optional<Uuid> newUuidIfValidPattern(String possibleUuid) {
    Preconditions.checkNotNull(possibleUuid, "possibleUuid == null");

    if (uuidPattern == null) {
        // Thread safe because it really doesn't matter even if we were to do this initialization more than once
        if (Uuid.PATTERN_CONSTANTS.size() != 1) {
            throw new IllegalStateException("Uuid.PATTERN_CONSTANTS.size() != 1");
        }/*  w w w  .j  av  a2  s .co  m*/
        uuidPattern = Pattern.compile(Uuid.PATTERN_CONSTANTS.get(0));
    }

    if (uuidPattern.matcher(possibleUuid).matches()) {
        return Optional.of(new Uuid(possibleUuid));
    } else {
        return Optional.absent();
    }
}

From source file:org.apache.gobblin.data.management.conversion.hive.entities.HiveProcessingEntity.java

public HiveProcessingEntity(HiveDataset hiveDataset, Table table) {
    this(hiveDataset, table, Optional.absent());
}

From source file:io.urmia.md.model.storage.ObjectName.java

/**
 * root:        /owner//* w  ww . jav a2  s. co  m*/
 * namespace:   /owner/ns/path
 */
public static Optional<ObjectName> of(URI uri) {

    if (uri == null)
        return Optional.absent();

    final String uriPath = appendTrailingSlash(uri.getPath());

    if (!startsWith('/', uriPath))
        return Optional.absent();

    int secondSlashPos = uriPath.indexOf('/', 1);

    if (secondSlashPos == -1)
        return Optional.absent();

    final String owner = uriPath.substring(1, secondSlashPos);

    if (isEmpty(owner)) // no owner
        return Optional.absent();

    // todo: only if mds.userExists(owner)
    if (secondSlashPos == uriPath.length() - 1) // special case of /user/ only. for listing root namespaces
        return Optional.of(new ObjectName(owner, Namespace.ROOT, "/", ""));

    String nsPath = uriPath.substring(secondSlashPos + 1);

    int thirdSlashPos = nsPath.indexOf('/');

    if (thirdSlashPos <= 0) // no namespace
        return Optional.absent();

    final String nsName = nsPath.substring(0, thirdSlashPos);

    final ObjectName.Namespace ns = ObjectName.Namespace.of(nsName);
    if (ns.unknown())
        return Optional.absent(); // unknown ns

    final String normalPath = normalize(nsPath.substring(thirdSlashPos));
    final String parent = UnixPathUtils.parent(normalPath);
    final String name = UnixPathUtils.name(normalPath);

    final ObjectName on = new ObjectName(owner, ns, parent, name);

    return Optional.of(on);
}