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:com.eucalyptus.auth.tokens.RoleSecurityTokenAttributes.java

public static <T extends RoleSecurityTokenAttributes> Optional<T> fromContext(Class<T> type) {
    try {// w  w w. ja va2  s.c om
        final Context context = Contexts.lookup();
        final UserPrincipal principal = context.getUser();
        if (principal != null) {
            final Optional<RoleSecurityTokenAttributes> attributes = RoleSecurityTokenAttributes
                    .forUser(principal);
            if (attributes.isPresent() && type.isInstance(attributes.get())) {
                return Optional.of(type.cast(attributes.get()));
            }
        }
    } catch (final IllegalContextAccessException e) {
        // absent
    }
    return Optional.absent();

}

From source file:google.registry.tools.params.OptionalParameterConverterValidator.java

@Override
public final Optional<T> convert(String value) {
    if (value.equals(NULL_STRING) || value.isEmpty()) {
        return Optional.absent();
    } else {/*from  w  ww .  j ava 2s .c o  m*/
        return Optional.of(validator.convert(value));
    }
}

From source file:org.sonar.server.computation.task.projectanalysis.measure.MeasureDtoToMeasure.java

public Optional<Measure> toMeasure(@Nullable MeasureDto measureDto, Metric metric) {
    requireNonNull(metric);//  w  ww .ja  v a 2s.  c  om
    if (measureDto == null) {
        return Optional.absent();
    }
    Double value = measureDto.getValue();
    String data = measureDto.getData();
    switch (metric.getType().getValueType()) {
    case INT:
        return toIntegerMeasure(measureDto, value, data);
    case LONG:
        return toLongMeasure(measureDto, value, data);
    case DOUBLE:
        return toDoubleMeasure(measureDto, value, data);
    case BOOLEAN:
        return toBooleanMeasure(measureDto, value, data);
    case STRING:
        return toStringMeasure(measureDto, data);
    case LEVEL:
        return toLevelMeasure(measureDto, data);
    case NO_VALUE:
        return toNoValueMeasure(measureDto);
    default:
        throw new IllegalArgumentException("Unsupported Measure.ValueType " + metric.getType().getValueType());
    }
}

From source file:org.apache.usergrid.persistence.index.CandidateResults.java

public CandidateResults(List<CandidateResult> candidates,
        final Collection<SelectFieldMapping> getFieldMappings) {
    this.candidates = candidates;
    this.getFieldMappings = getFieldMappings;
    offset = Optional.absent();
}

From source file:org.zanata.email.ContactAdminAnonymousEmailStrategy.java

@Override
public Optional<InternetAddress[]> getReplyToAddress() {
    return Optional.absent();
}

From source file:com.wealdtech.jersey.exceptions.HttpException.java

/**
 * Generate an HTTP exception with underlying application exception.
 * @param status an HTTP status to be sent back to the requestor
 * @param message an explanation of the error
 * @param userMessage TODO/*from w  w w  .  java 2  s .  c  om*/
 */
public HttpException(final Status status, final String message, String userMessage) {
    super(message, userMessage, null, null);
    this.status = status;
    this.retryAfter = Optional.absent();
}

From source file:org.splevo.jamopp.refactoring.java.caslicensehandler.cheatsheet.actions.JaMoPPRoutines.java

/**
 * Returns the concrete classifier (JaMoPP) for the given type (JavaCore).
 * //from  w w w  .j  a v a 2  s .co m
 * @param type
 *            represents the type.
 * @return the matched classifier.
 */
public static Optional<ConcreteClassifier> getConcreteClassifierOf(IType type) {
    ResourceSet resourceSet = ((JaMoPPJavaSoftwareElement) CASLicenseHandlerConfiguration.getInstance()
            .getVariationPoint().getLocation()).getJamoppElement().eResource().getResourceSet();

    final String typeName = type.getElementName();
    URI resourceURI = URI.createPlatformResourceURI(type.getResource().getFullPath().toString(), true);
    Resource r = resourceSet.getResource(resourceURI, true);
    for (CompilationUnit cu : Iterables.filter(r.getContents(), CompilationUnit.class)) {
        LinkedList<ConcreteClassifier> queue = Lists.newLinkedList(cu.getClassifiers());
        while (!queue.isEmpty()) {
            ConcreteClassifier classifier = queue.pop();
            if (typeName.equals(classifier.getName())) {
                return Optional.of(classifier);
            }
        }
    }

    return Optional.absent();
}

From source file:org.sonar.server.platform.ServerIdLoader.java

public Optional<ServerId> get() {
    Optional<String> rawId = getRaw();
    if (!rawId.isPresent()) {
        return Optional.absent();
    }/*  w w w .  ja  va 2  s  . c  om*/

    String organization = settings.getString(CoreProperties.ORGANISATION);
    String ipAddress = settings.getString(CoreProperties.SERVER_ID_IP_ADDRESS);
    boolean validated = organization != null && ipAddress != null
            && idGenerator.validate(organization, ipAddress, rawId.get());

    return Optional.of(new ServerId(rawId.get(), validated));
}

From source file:com.dasasian.chok.command.StartLuceneNodeCommand.java

@Override
protected void parseArguments(ZkConfiguration zkConf, String[] args, Map<String, String> optionMap) {
    Optional<Integer> startPort = Optional.absent();
    if (optionMap.containsKey("-p")) {
        startPort = Optional.of(Integer.parseInt(optionMap.get("-p")));
    }/*from  w  ww .  j a  va  2 s . c o m*/

    Optional<File> shardFolder = Optional.absent();
    if (optionMap.containsKey("-f")) {
        shardFolder = Optional.of(new File(optionMap.get("-f")));
    }

    try {
        nodeConfiguration = LuceneNodeConfigurationLoader.loadConfiguration(startPort, shardFolder);
    } catch (ClassNotFoundException e) {
        throw new RuntimeException(e);
    }

    server = new LuceneServer();
}

From source file:com.hellblazer.glassHouse.demo.ExampleAuthenticator.java

@Override
public Optional<AuthenticatedUser> authenticate(final BasicCredentials credentials)
        throws AuthenticationException {
    if ("secret".equals(credentials.getPassword())) {
        AuthenticatedUser user = new AuthenticatedUser() {
            private final String name = credentials.getUsername();

            @Override//from  w ww.  ja  va  2  s . c  o  m
            public String getName() {
                return name;
            }
        };
        return Optional.of(user);
    }
    return Optional.absent();
}