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

Introduction

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

Prototype

public static <T> Optional<T> of(T reference)

Source Link

Document

Returns an Optional instance containing the given non-null reference.

Usage

From source file:org.wisepersist.UserDao.java

@NonTransactional
public Optional<User> findByEmail(String email) {
    TypedQuery<User> query = em().createQuery("SELECT user FROM User user WHERE user.email=:email", User.class);
    query.setParameter("email", email);
    List<User> users = query.getResultList();
    if (users.size() > 0) {
        return Optional.of(users.get(0));
    }//from   ww  w.  ja  va 2s.c  om
    return Optional.absent();
}

From source file:se.sics.ktoolbox.util.reference.SimpleKReference.java

public SimpleKReference(V value) {
    this.counter = new AtomicInteger(1);
    this.value = Optional.of(value);
}

From source file:de.flapdoodle.javaparser.parboiled.helper.ParameterWithChild.java

@Override
protected Optional<Parameter> asParameter() {
    return Optional.of(new Parameter(_typeAsString));
}

From source file:com.opower.rest.client.generator.util.StringConverters.java

private static ConcurrentMap<Class<?>, StringConverter<?>> init() {
    ConcurrentMap<Class<?>, StringConverter<?>> map = new MapMaker().makeMap();
    map.putAll(ImmutableMap.<Class<?>, StringConverter<?>>builder()
            .put(Optional.absent().getClass(), new OptionalConverter())
            .put(Optional.of(true).getClass(), new OptionalConverter())
            .put(Cookie.class, new CookieStringConverter()).put(EntityTag.class, new EntityTagDelegate())
            .put(Locale.class, new LocaleDelegate()).put(MediaType.class, new MediaTypeStringConverter())
            .put(URI.class, new UriStringConverter()).put(NewCookie.class, new NewCookieStringConverter())
            .put(CacheControl.class, new CacheControlDelegate()).build());
    return map;/*from w ww .  ja v  a 2  s  . c  o  m*/
}

From source file:com.google.devtools.build.lib.rules.apple.XcodeConfigProvider.java

XcodeConfigProvider(DottedVersion xcodeVersion) {
    this.xcodeVersion = Optional.of(xcodeVersion);
}

From source file:org.metaservice.core.dispatcher.postprocessor.CloseTempRepositoryPipe.java

@Override
public Optional<PostProcessorDispatcher.Context> process(PostProcessorDispatcher.Context context)
        throws Exception {
    context.resultConnection.close();//w  w  w  .  jav a2  s  . c o m
    context.resultRepository.shutDown();
    context.resultConnection = null;
    context.resultRepository = null;
    return Optional.of(context);
}

From source file:com.palantir.common.remoting.ServiceNotAvailableException.java

public ServiceNotAvailableException(String message, Throwable cause, HostAndPort serviceHint) {
    super(message, cause);
    this.serviceHint = Optional.of(serviceHint);
}

From source file:org.apache.giraph.utils.DistributedCacheUtils.java

/**
 * Get local path to file from a DistributedCache.
 *
 * @param conf Configuration/*www .j  av  a 2s  .  c om*/
 * @param pathToMatch Path that was used to insert into DistributedCache
 * @return Path matched, or Optional.absent()
 */
public static Optional<Path> getLocalCacheFile(Configuration conf, String pathToMatch) {
    String nameToPath = FilenameUtils.getName(pathToMatch);
    Path[] paths;
    try {
        paths = DistributedCache.getLocalCacheFiles(conf);
    } catch (IOException e) {
        return Optional.absent();
    }
    for (Path path : paths) {
        if (FilenameUtils.getName(path.toString()).equals(nameToPath)) {
            return Optional.of(path);
        }
    }
    return Optional.absent();
}

From source file:org.geogit.api.plumbing.ResolveBranchId.java

@Override
public Optional<Ref> call() {
    Preconditions.checkState(id != null, "id has not been set.");
    Predicate<Ref> filter = new Predicate<Ref>() {
        @Override/*from w w  w .  ja v a  2s. c om*/
        public boolean apply(@Nullable Ref ref) {
            return ref.getObjectId().equals(id);
        }
    };
    ImmutableSet<Ref> refs = command(ForEachRef.class).setFilter(filter).call();
    if (refs.isEmpty()) {
        return Optional.absent();
    } else {
        return Optional.of(refs.iterator().next());
    }
}

From source file:com.facebook.buck.rules.coercer.SetTypeCoercer.java

@Override
public Optional<ImmutableSet<T>> getOptionalValue() {
    return Optional.of(ImmutableSet.<T>of());
}