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

Introduction

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

Prototype

public abstract boolean isPresent();

Source Link

Document

Returns true if this holder contains a (non-null) instance.

Usage

From source file:ninja.utils.NinjaModeHelper.java

/**
 * returns NinjaMode.dev if no mode is set. Or the valid mode
 * set via a System Property called "ninja.mode".
 * //from  w  w w  . ja  va 2s  .com
 * E.g. under mvn you can use mvn ... -Dninja.mode=prod or so. Valid values
 * for ninja.mode are "prod", "dev", "test".
 * 
 * @return The valid mode set via a System Property called "ninja.mode"
 *          or NinjaMode.dev if it is not set.
 */
public static NinjaMode determineModeFromSystemPropertiesOrProdIfNotSet() {

    Optional<NinjaMode> ninjaModeOptional = determineModeFromSystemProperties();
    NinjaMode ninjaMode;

    if (!ninjaModeOptional.isPresent()) {
        ninjaMode = NinjaMode.prod;
    } else {
        ninjaMode = ninjaModeOptional.get();
    }

    logger.info("Ninja is running in mode {}", ninjaMode.toString());

    return ninjaMode;

}

From source file:com.eucalyptus.cassandra.config.CassandraSysUtil.java

static void createKeyspaces() {
    CassandraKeyspaces.all(CassandraCluster.datacenter(), 1).forEach(t -> {
        final String keyspace = t._1();
        final Optional<Throwable> throwableOptional = t._2();
        if (throwableOptional.isPresent()) {
            logger.error("Error processing keyspace " + keyspace, throwableOptional.get());
        } else {/*ww  w.j  a va 2s . co  m*/
            logger.info("Processed keyspace " + keyspace);
        }
    });
}

From source file:com.github.jeluard.extend.osgi.OSGILoader.java

private static <T> T setIfAbsentAndReturn(final AtomicReference<Optional<T>> reference,
        final Supplier<T> callable) {
    //TODO conc./*from   w  ww  .  j  av  a  2  s  . co  m*/
    final Optional<T> optionalValue = reference.get();
    if (optionalValue.isPresent()) {
        return optionalValue.get();
    }

    final T value = callable.get();
    reference.set(Optional.fromNullable(value));
    return value;
}

From source file:org.opendaylight.restconf.restful.utils.RestconfInvokeOperationsUtil.java

/**
 * Invoking rpc via mount point/*from   w  ww. jav  a2  s.  com*/
 *
 * @param mountPoint
 *            - mount point
 * @param data
 *            - input data
 * @param schemaPath
 *            - schema path of data
 * @return {@link CheckedFuture}
 */
public static DOMRpcResult invokeRpcViaMountPoint(final DOMMountPoint mountPoint,
        final NormalizedNode<?, ?> data, final SchemaPath schemaPath) {
    final Optional<DOMRpcService> mountPointService = mountPoint.getService(DOMRpcService.class);
    if (mountPointService.isPresent()) {
        final CheckedFuture<DOMRpcResult, DOMRpcException> rpc = mountPointService.get().invokeRpc(schemaPath,
                data);
        return prepareResult(rpc);
    }
    final String errmsg = "RPC service is missing.";
    LOG.debug(errmsg);
    throw new RestconfDocumentedException(errmsg);
}

From source file:org.apache.gobblin.metrics.event.EventSubmitter.java

/**
 * Calls submit on submitter if present.
 *///from  w  w  w.  j  ava2 s.  c  om
public static void submit(Optional<EventSubmitter> submitter, String name) {
    if (submitter.isPresent()) {
        submitter.get().submit(name);
    }
}

From source file:org.kuali.rice.core.web.util.PropertySources.java

/**
 * Check system properties and servlet context init params for an annotated Spring configuration
 * class located under {@code key}. If present, create a new
 * {@AnnotationConfigWebApplicationContext} and register
 * the annotated configuration class. Refresh the context and then examine it for a
 * {@code PropertySource<?>} bean. There must be exactly one {@code PropertySource<?>} bean
 * present in the application context.//from  w  w w  .j a  v  a2s . c  o m
 */
public static Optional<PropertySource<?>> getPropertySource(ServletContextEvent sce, String key) {
    Optional<String> annotatedClass = getProperty(sce, key);
    if (annotatedClass.isPresent()) {
        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
        context.setServletContext(sce.getServletContext());
        PropertySource<?> propertySource = getPropertySource(annotatedClass.get(), context);
        return Optional.<PropertySource<?>>of(propertySource);
    } else {
        return Optional.absent();
    }
}

From source file:com.google.gitiles.ArchiveFormat.java

static ArchiveFormat getDefault(Config cfg) {
    for (String allowed : cfg.getStringList("archive", null, "format")) {
        Optional<ArchiveFormat> result = Enums.getIfPresent(ArchiveFormat.class, allowed.toUpperCase());
        if (result.isPresent()) {
            return result.get();
        }//w  w  w  .  ja  v a2  s  .  co  m
    }
    return TGZ;
}

From source file:com.arpnetworking.utility.SampleUtils.java

/**
 * Converts all of the samples to a single unit.
 *
 * @param samples samples to convert//from   ww  w .ja  v  a 2s  .  c om
 * @return list of samples with a unified unit
 */
public static List<Quantity> unifyUnits(final List<Quantity> samples) {
    //This is a 2-pass operation:
    //First pass is to grab the smallest unit in the samples
    //Second pass is to convert everything to that unit
    Optional<Unit> smallestUnit = Optional.absent();
    for (final Quantity sample : samples) {
        if (!smallestUnit.isPresent()) {
            smallestUnit = sample.getUnit();
        } else if (sample.getUnit().isPresent()
                && smallestUnit.get().getSmallerUnit(sample.getUnit().get()) != smallestUnit.get()) {
            smallestUnit = sample.getUnit();
        }
    }

    if (smallestUnit.isPresent()) {
        return FluentIterable.from(samples).transform(new SampleConverter(smallestUnit.get())).toList();
    }

    return samples;
}

From source file:org.opendaylight.genius.interfacemanager.globals.InterfaceServiceUtil.java

public static short getVlanId(String interfaceName, DataBroker broker) {
    InstanceIdentifier<Interface> id = InstanceIdentifier.builder(Interfaces.class)
            .child(Interface.class, new InterfaceKey(interfaceName)).build();
    Optional<Interface> ifInstance = MDSALUtil.read(LogicalDatastoreType.CONFIGURATION, id, broker);
    if (ifInstance.isPresent()) {
        IfL2vlan vlanIface = ifInstance.get().getAugmentation(IfL2vlan.class);
        return vlanIface.getVlanId() == null ? 0 : vlanIface.getVlanId().getValue().shortValue();
    }// w w  w  .  j  a va2 s .  c om
    return -1;
}

From source file:utils.PasswordManager.java

/**
 * Decrypt an encrypted password. A master password must have been provided in the constructor.
 * @param encrypted An encrypted password.
 * @return The decrypted password./*  w  w  w . j  a  v a  2  s  . c o m*/
 */
public static String decryptPassword(String encrypted, Optional<String> masterPassword) {
    Optional<BasicTextEncryptor> encryptor = getEncryptor(masterPassword);
    Preconditions.checkArgument(encryptor.isPresent(), ERROR_DECRY_MSG);

    try {
        return encryptor.get().decrypt(encrypted);
    } catch (Exception e) {
        throw new RuntimeException("Failed to decrypt password " + encrypted, e);
    }
}