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:org.fusesource.fabric.service.jclouds.functions.ToAdminAccess.java

public static Optional<AdminAccess> apply(CreateJCloudsContainerOptions input) {
    AdminAccess.Builder builder = AdminAccess.builder();
    //There are images that have issues with copying of public keys, creation of admin user accounts,etc
    //To allow//from   w  w w. java  2  s . c  o  m
    if (input.isAdminAccess()) {
        if (!Strings.isNullOrEmpty(input.getPublicKeyFile())) {
            File publicKey = new File(input.getPublicKeyFile());
            if (publicKey.exists()) {
                builder.adminPublicKey(publicKey);
            } else {
                LOGGER.warn("Public key has been specified file: {} files cannot be found. Ignoring.",
                        publicKey.getAbsolutePath());
                return Optional.of(AdminAccess.standard());
            }
        }

        if (!Strings.isNullOrEmpty(input.getUser())) {
            builder.adminUsername(input.getUser());
        }

        return Optional.of(builder.build());
    }
    return Optional.absent();
}

From source file:org.sonar.server.computation.task.projectanalysis.scm.DbScmInfo.java

static Optional<ScmInfo> create(Component component, Iterable<DbFileSources.Line> lines) {
    LineToChangeset lineToChangeset = new LineToChangeset();
    List<Changeset> lineChangesets = StreamSupport.stream(lines.spliterator(), false).map(lineToChangeset)
            .filter(Objects::nonNull).collect(MoreCollectors.toList());
    if (lineChangesets.isEmpty()) {
        return Optional.absent();
    }/*from  ww w. ja  v  a 2  s . com*/
    checkState(!lineToChangeset.isEncounteredLineWithoutScmInfo(),
            "Partial scm information stored in DB for component '%s'. Not all lines have SCM info. Can not proceed",
            component);
    return Optional.of(new DbScmInfo(new ScmInfoImpl(lineChangesets)));
}

From source file:si.klepra.dropwizardbookmarks.auth.HelloAuthenticator.java

@Override
public Optional<User> authenticate(BasicCredentials c) throws AuthenticationException {

    //call db or auth service here!
    if (configuration.getPassword().equals(c.getPassword())) {
        return Optional.of(new User());
    }/*  w  w  w  .j  av  a 2 s .  c  om*/
    return Optional.absent();
}

From source file:com.jivesoftware.os.hwal.permit.ExpirablePermit.java

public Optional<Integer> getPermit() {
    Permit permit = expirableDelegatePermit.get();
    if (permit == null) {
        return Optional.absent();
    } else {//from   w  ww  .  j  a  v a 2 s .  co  m
        return Optional.of(permit.id);
    }
}

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

public TargetAndClient(final HeliosClient client) {
    this.target = Optional.absent();
    this.client = client;
}

From source file:ec.nbdemetra.ui.tsproviders.ProvidersUtil.java

public static Optional<Node> findNode(DataSource dataSource, Node node) {
    if (node instanceof ProvidersNode) {
        return find(dataSource, (ProvidersNode) node);
    }/* w  w w.  j a v  a  2  s  . c om*/
    if (node instanceof ProviderNode) {
        return find(dataSource, (ProviderNode) node);
    }
    return Optional.absent();
}

From source file:org.spongepowered.api.util.rotation.Rotations.java

public static Optional<Rotation> getRotationForDegree(int degrees) {
    return Optional.absent();
}

From source file:com.google.template.soy.shared.RangeArgs.java

/**
 * Returns a optional {@link RangeArgs} object if the for loop expression is a {@code range(...)}
 * expression./*from  w w w  .  j  a  v a  2s .  c  o  m*/
 */
public static final Optional<RangeArgs> createFromNode(ForNode node) {
    if (node.getExpr().getRoot() instanceof FunctionNode) {
        FunctionNode fn = (FunctionNode) node.getExpr().getRoot();
        if (fn.getSoyFunction() instanceof RangeFunction) {
            return Optional.of(create(fn.getChildren()));
        }
    }
    return Optional.absent();
}

From source file:org.excalibur.core.ssh.SshClientFactory.java

public static SshClient.Factory defaultSshClientFactory() {
    return new SshClient.Factory() {
        int timeout = SystemUtils2.getIntegerProperty("org.excalibur.ssh.default.connection.timeout.ms", 60000);

        Optional<Connector> agentConnector = getAgentConnector();

        @Override//from   www  .j a va 2  s  .c  o m
        public boolean isAgentAvailable() {
            return agentConnector.isPresent();
        }

        @Override
        public SshClient create(HostAndPort socket, LoginCredentials credentials) {
            return new JschSshClient(socket, credentials, timeout, agentConnector,
                    new BackoffLimitedRetryHandler());
        }

        Optional<Connector> getAgentConnector() {
            try {
                return Optional.of(ConnectorFactory.getDefault().createConnector());
            } catch (final AgentProxyException e) {
                return Optional.absent();
            }
        }
    };
}

From source file:info.gehrels.voting.singleTransferableVote.VoteState.java

public static <CANDIDATE_TYPE extends Candidate> Optional<VoteState<CANDIDATE_TYPE>> forBallotAndElection(
        Ballot<CANDIDATE_TYPE> ballot, Election<CANDIDATE_TYPE> election) {
    validateThat(ballot, is(notNullValue()));
    validateThat(election, is(notNullValue()));

    Optional<Vote<CANDIDATE_TYPE>> vote = ballot.getVote(election);
    if (!vote.isPresent()) {
        return Optional.absent();
    }//from   ww  w  .  j a v  a 2s.com

    return Optional.of(new VoteState<>(ballot.id, vote.get()));
}