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:com.dangdang.ddframe.rdb.sharding.parser.result.router.Table.java

public Table(final String name, final String alias) {
    this(name, Optional.fromNullable(alias));
}

From source file:net.awairo.mcmod.spawnchecker.client.common.Refrection.java

/**
 * ??????????./*from   w w  w.j  ava 2 s. c om*/
 * 
 * @return ??.
 */
public static Optional<InetSocketAddress> getServerAddress() {
    checkState(GAME.theWorld != null, "world is not started");
    checkState(GAME.getIntegratedServer() == null, "current mode is the single player.");

    final NetHandlerPlayClient sendQueue = getFieldValue(WorldClient.class, GAME.theWorld, "sendQueue",
            ConstantsConfig.instance().sendQueueSrgName);

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

    final NetworkManager netManager = sendQueue.getNetworkManager();

    if (netManager.getSocketAddress() instanceof InetSocketAddress)
        return Optional.fromNullable((InetSocketAddress) netManager.getSocketAddress());

    if (LOGGER.isDebugEnabled() && netManager.getSocketAddress() != null)
        LOGGER.debug(netManager.getSocketAddress().getClass().getName());

    LOGGER.warn("not found InetSocketAddress");

    return Optional.absent();
}

From source file:ph.devcon.android.speaker.fragment.AllSpeakerFragment.java

@Override
public void onResume() {
    super.onResume();
    FetchedAllSpeakerListEvent event = eventBus.getStickyEvent(FetchedAllSpeakerListEvent.class);
    Optional<FetchedAllSpeakerListEvent> eventOptional = Optional.fromNullable(event);
    if (eventOptional.isPresent()) {
        setSpeakerList(eventOptional.get().speakers);
    }/*www . j  a va  2 s  . co m*/
}

From source file:gobblin.converter.http.RestEntry.java

public RestEntry(String resourcePath, T restEntryVal) {
    this.resourcePath = Optional.fromNullable(resourcePath);
    this.restEntryVal = restEntryVal;
}

From source file:ninja.utils.NinjaModeHelper.java

/**
 * returns an empty Optional<NinjaMode> if no mode is set. Or the valid mode
 * set via a System Property called "ninja.mode".
 * //  w  w w  .  ja  va2 s .c o  m
 * 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 Optional absent if we cannot get one.
 */
public static Optional<NinjaMode> determineModeFromSystemProperties() {

    NinjaMode ninjaMode = null;

    // Get mode possibly set via a system property
    String modeFromGetSystemProperty = System.getProperty(NinjaConstant.MODE_KEY_NAME);

    // If the user specified a mode we set the mode accordingly:
    if (modeFromGetSystemProperty != null) {

        if (modeFromGetSystemProperty.equals(NinjaConstant.MODE_TEST)) {

            ninjaMode = NinjaMode.test;

        } else if (modeFromGetSystemProperty.equals(NinjaConstant.MODE_DEV)) {

            ninjaMode = NinjaMode.dev;

        } else if (modeFromGetSystemProperty.equals(NinjaConstant.MODE_PROD)) {

            ninjaMode = NinjaMode.prod;

        }

    }

    return Optional.fromNullable(ninjaMode);

}

From source file:org.onos.yangtools.yang.data.api.schema.tree.spi.MaterializedContainerNode.java

@Override
public Optional<TreeNode> getChild(final PathArgument key) {
    return Optional.fromNullable(children.get(key));
}

From source file:com.github.nethad.clustermeister.api.impl.ExecutorServiceMode.java

/**
 * Bundles Callables/Runnables and executes them after the given timeout.
 * @param timeout in milliseconds/*from   w w w.  ja v  a 2  s  .  com*/
 * @return 
 */
public static ExecutorServiceMode timeConstraint(long timeout) {
    return new GenericExecutorServiceMode(Optional.fromNullable(timeout), Optional.<Integer>absent());
}

From source file:org.asoem.greyfish.utils.base.Memoizer.java

@Override
public final T get() {
    if (!isValid(value)) {
        synchronized (this) {
            if (!isValid(value)) {
                T t = delegate().get();/*w  w w . j a  v a 2  s  .  c o  m*/
                value = Optional.fromNullable(t);
                loaded(t);
                return t;
            }
        }
    }
    return value.orNull();
}

From source file:org.locationtech.geogig.plumbing.diff.DiffSummary.java

public Optional<M> getMergedResult() {
    return Optional.fromNullable(merged);
}

From source file:google.registry.keyring.api.KeyModule.java

@Provides
@Key("marksdbLordnPassword")
static Optional<String> provideMarksdbLordnPassword(Keyring keyring) {
    return Optional.fromNullable(emptyToNull(keyring.getMarksdbLordnPassword()));
}