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

Introduction

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

Prototype

public static <T> Optional<T> fromNullable(@Nullable T nullableReference)

Source Link

Document

If nullableReference is non-null, returns an Optional instance containing that reference; otherwise returns Optional#absent .

Usage

From source file:org.eclipse.che.plugin.gdb.ide.configuration.GdbConfigurationPagePresenter.java

private static String getBinaryPath(DebugConfiguration editedConfiguration) {
    Map<String, String> connectionProperties = editedConfiguration.getConnectionProperties();
    Optional<String> binPathOptional = Optional
            .fromNullable(connectionProperties.get(BIN_PATH_CONNECTION_PROPERTY));
    return binPathOptional.or("");
}

From source file:org.geogit.rest.repository.GeogitResourceUtils.java

public static Optional<String> getRepositoryName(Request request) {
    final String repo = RESTUtils.getAttribute(request, "repository");
    if (repo != null && !repo.contains(":")) {
        throw new IllegalArgumentException(
                "Repository name should be of the form <workspace>:<datastore>: " + repo);
    }//from w  w  w.j ava2  s  .  c o m
    return Optional.fromNullable(repo);
}

From source file:info.archinnov.achilles.type.Options.java

public Optional<ConsistencyLevel> getConsistencyLevel() {
    return Optional.fromNullable(consistency);
}

From source file:gobblin.compliance.utils.DatasetUtils.java

public static String getProperty(HivePartitionDataset dataset, String property, long defaultValue) {
    Optional<String> propertyValueOptional = Optional.fromNullable(dataset.getParams().get(property));
    if (!propertyValueOptional.isPresent()) {
        return Long.toString(defaultValue);
    }//  w w w .  ja v  a2  s. c om
    try {
        long propertyVal = Long.parseLong(propertyValueOptional.get());
        if (propertyVal < 0) {
            return Long.toString(defaultValue);
        } else {
            return Long.toString(propertyVal);
        }
    } catch (NumberFormatException e) {
        return Long.toString(defaultValue);
    }
}

From source file:io.mesosphere.mesos.frameworks.cassandra.ZooKeeperSeedProviderConfig.java

private static Optional<Integer> optionalInteger(String key, Map<String, String> parameters) {
    Optional<String> stringOption = optionalString(key, parameters);

    if (stringOption.isPresent()) {

        try {//from  w w  w.  ja  va 2s.c om

            return Optional.fromNullable(Integer.parseInt(stringOption.get()));

        } catch (NumberFormatException nfe) {

            LOGGER.error(String.format("failed to parse %s", key), nfe);

            return Optional.absent();
        }

    } else {
        return Optional.absent();
    }

}

From source file:net.es.nsi.pce.pf.PfUtils.java

public static String getSourceStpOrFail(P2PServiceBaseType p2ps) {
    Optional<String> sourceStp = Optional.fromNullable(Strings.emptyToNull(p2ps.getSourceSTP()));
    if (sourceStp.isPresent()) {
        return sourceStp.get();
    }//from www  . ja  v  a  2 s.  c o m

    throw Exceptions.missingParameter(Point2PointTypes.getSourceStp().getNamespace(),
            Point2PointTypes.getSourceStp().getType(), "null");
}

From source file:com.googlesource.gerrit.plugins.github.git.GitHubUser.java

private static Optional<String> initFullName(GHUser gitHubUser) throws IOException {
    return Optional.fromNullable(gitHubUser != null ? Strings.emptyToNull(gitHubUser.getName()) : null);
}

From source file:org.spongepowered.api.entity.living.meta.HorseColors.java

public static Optional<HorseColor> valueOf(String name) {
    return Optional.fromNullable(null);
}

From source file:com.facebook.buck.java.JavaLibraryRules.java

static void addAccumulateClassNamesStep(JavaLibrary javaLibrary, BuildableContext buildableContext,
        ImmutableList.Builder<Step> steps) {
    Preconditions.checkNotNull(javaLibrary);

    Path pathToClassHashes = JavaLibraryRules.getPathToClassHashes(javaLibrary.getBuildTarget());
    steps.add(new MkdirStep(pathToClassHashes.getParent()));
    steps.add(new AccumulateClassNamesStep(Optional.fromNullable(javaLibrary.getPathToOutputFile()),
            pathToClassHashes));//from   w w  w. j  a  va2 s .c  om
    buildableContext.recordArtifact(pathToClassHashes);
}

From source file:com.ngdata.hbaseindexer.util.solr.SolrConnectionParamUtil.java

public static int getSolrMaxConnectionsPerRoute(Map<String, String> connectionParameters) {
    return Integer.parseInt(Optional
            .fromNullable(connectionParameters.get(SolrConnectionParams.MAX_CONNECTIONS_PER_HOST)).or("128"));
}